redisearch

package
v2.1.1 Latest Latest
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 Go to latest Published: Jul 25, 2022 License: BSD-3-Clause Imports: 12 Imported by: 18

Documentation

Index

Examples

Constants

View Source 
const (
	// GroupByReducerCount is an alias for GROUPBY reducer COUNT
	GroupByReducerCount = GroupByReducers("COUNT")

	// GroupByReducerCountDistinct is an alias for GROUPBY reducer COUNT_DISTINCT
	GroupByReducerCountDistinct = GroupByReducers("COUNT_DISTINCT")

	// GroupByReducerCountDistinctish is an alias for GROUPBY reducer COUNT_DISTINCTISH
	GroupByReducerCountDistinctish = GroupByReducers("COUNT_DISTINCTISH")

	// GroupByReducerSum is an alias for GROUPBY reducer SUM
	GroupByReducerSum = GroupByReducers("SUM")

	// GroupByReducerMin is an alias for GROUPBY reducer MIN
	GroupByReducerMin = GroupByReducers("MIN")

	// GroupByReducerMax is an alias for GROUPBY reducer MAX
	GroupByReducerMax = GroupByReducers("MAX")

	// GroupByReducerAvg is an alias for GROUPBY reducer AVG
	GroupByReducerAvg = GroupByReducers("AVG")

	// GroupByReducerStdDev is an alias for GROUPBY reducer STDDEV
	GroupByReducerStdDev = GroupByReducers("STDDEV")

	// GroupByReducerQuantile is an alias for GROUPBY reducer QUANTILE
	GroupByReducerQuantile = GroupByReducers("QUANTILE")

	// GroupByReducerToList is an alias for GROUPBY reducer TOLIST
	GroupByReducerToList = GroupByReducers("TOLIST")

	// GroupByReducerFirstValue is an alias for GROUPBY reducer FIRST_VALUE
	GroupByReducerFirstValue = GroupByReducers("FIRST_VALUE")

	// GroupByReducerRandomSample is an alias for GROUPBY reducer RANDOM_SAMPLE
	GroupByReducerRandomSample = GroupByReducers("RANDOM_SAMPLE")
)
View Source 
const (
	Flat algorithm = "FLAT"
	HNSW algorithm = "HNSW"
)

Supported algorithms for Vector field

Variables

View Source 
var DefaultIndexingOptions = IndexingOptions{
	Language:         "",
	NoSave:           false,
	Replace:          false,
	Partial:          false,
	ReplaceCondition: "",
}

DefaultIndexingOptions are the default options for document indexing

View Source 
var DefaultOptions = Options{
	NoSave:            false,
	NoFieldFlags:      false,
	NoFrequencies:     false,
	NoOffsetVectors:   false,
	Stopwords:         nil,
	Temporary:         false,
	TemporaryPeriod:   0,
	MaxTextFieldsFlag: false,
	NoHighlights:      false,
	SkipInitialScan:   false,
}

DefaultOptions represents the default options

View Source 
var DefaultSuggestOptions = SuggestOptions{
	Num:          5,
	Fuzzy:        false,
	WithPayloads: false,
	WithScores:   false,
}

DefaultIndexingOptions are the default options for document indexing

Functions

func EscapeTextFileString 

func EscapeTextFileString(value string) string

All punctuation marks and whitespaces (besides underscores) separate the document and queries into tokens. e.g. any character of `,.<>{}[]"':;!@#$%^&*()-+=~` will break the text into terms. So the text `foo-bar.baz...bag` will be tokenized into `[foo, bar, baz, bag]` Escaping separators in both queries and documents is done by prepending a backslash to any separator. e.g. the text `hello\-world hello-world` will be tokenized as `[hello-world, hello, world]`. **NOTE** that in most languages you will need an extra backslash when formatting the document or query, to signify an actual backslash, so the actual text in redis-cli for example, will be entered as `hello\\-world`. Underscores (`_`) are not used as separators in either document or query. So the text `hello_world` will remain as is after tokenization.

func ProcessAggResponse deprecated 

func ProcessAggResponse(res []interface{}) [][]string

Deprecated: Please use processAggReply() instead

func ProcessAggResponseSS 

func ProcessAggResponseSS(res []interface{}) [][]string

func SerializeIndexingOptions 

func SerializeIndexingOptions(opts IndexingOptions, args redis.Args) redis.Args

func SerializeSchema 

func SerializeSchema(s *Schema, args redis.Args) (argsOut redis.Args, err error)

Types

type AggregateQuery 

type AggregateQuery struct {
	Query         *Query
	AggregatePlan redis.Args
	Paging        *Paging
	Max           int
	WithSchema    bool
	Verbatim      bool
	WithCursor    bool
	Cursor        *Cursor
}

AggregateQuery

func NewAggregateQuery 

func NewAggregateQuery() *AggregateQuery

func (*AggregateQuery) Apply 

func (a *AggregateQuery) Apply(expression Projection) *AggregateQuery

Apply a 1-to-1 transformation on some property

func (*AggregateQuery) CursorHasResults 

func (a *AggregateQuery) CursorHasResults() (res bool)

func (*AggregateQuery) Filter 

func (a *AggregateQuery) Filter(expression string) *AggregateQuery

Filter the results using predicate expressions relating to values in each result. They are is applied post-query and relate to the current state of the pipeline.

func (*AggregateQuery) GroupBy 

func (a *AggregateQuery) GroupBy(group GroupBy) *AggregateQuery

Adds a GROUPBY clause to the aggregate plan

func (*AggregateQuery) Limit 

func (a *AggregateQuery) Limit(offset int, num int) *AggregateQuery

Limit the number of results to return just num results starting at index offset (zero-based).

func (*AggregateQuery) Load 

func (a *AggregateQuery) Load(Properties []string) *AggregateQuery

Load document fields from the document HASH objects (if they are not in the sortables). Empty array will load all properties.

func (AggregateQuery) Serialize 

func (q AggregateQuery) Serialize() redis.Args

func (*AggregateQuery) SetCursor 

func (a *AggregateQuery) SetCursor(cursor *Cursor) *AggregateQuery

func (*AggregateQuery) SetMax 

func (a *AggregateQuery) SetMax(value int) *AggregateQuery

SetMax is used to optimized sorting, by sorting only for the n-largest elements

func (*AggregateQuery) SetQuery 

func (a *AggregateQuery) SetQuery(query *Query) *AggregateQuery

SetQuery sets the query to the AggregateQuery

func (*AggregateQuery) SetVerbatim 

func (a *AggregateQuery) SetVerbatim(value bool) *AggregateQuery

SetVerbatim - If set, we do not try to use stemming for query expansion but search the query terms verbatim.

func (*AggregateQuery) SetWithSchema 

func (a *AggregateQuery) SetWithSchema(value bool) *AggregateQuery

func (*AggregateQuery) SortBy 

func (a *AggregateQuery) SortBy(SortByProperties []SortingKey) *AggregateQuery

Adds a SORTBY clause to the aggregate plan

type Autocompleter 

type Autocompleter struct {
	// contains filtered or unexported fields
}

Autocompleter implements a redisearch auto-completer API

func NewAutocompleter 

func NewAutocompleter(addr, name string) *Autocompleter

NewAutocompleter creates a new Autocompleter with the given host and key name

func NewAutocompleterFromPool 

func NewAutocompleterFromPool(pool *redis.Pool, name string) *Autocompleter

NewAutocompleter creates a new Autocompleter with the given pool and key name

func (*Autocompleter) AddTerms 

func (a *Autocompleter) AddTerms(terms ...Suggestion) error

AddTerms pushes new term suggestions to the index

func (*Autocompleter) Delete 

func (a *Autocompleter) Delete() error

Delete deletes the Autocompleter key for this AC

func (*Autocompleter) DeleteTerms 

func (a *Autocompleter) DeleteTerms(terms ...Suggestion) error

DeleteTerms deletes term suggestions from the index

func (*Autocompleter) Length 

func (a *Autocompleter) Length() (len int64, err error)

Length gets the size of the suggestion

func (*Autocompleter) Serialize 

func (a *Autocompleter) Serialize(prefix string, opts SuggestOptions) (redis.Args, int)

func (*Autocompleter) Suggest deprecated 

func (a *Autocompleter) Suggest(prefix string, num int, fuzzy bool) (ret []Suggestion, err error)

Suggest gets completion suggestions from the Autocompleter dictionary to the given prefix. If fuzzy is set, we also complete for prefixes that are in 1 Levenshten distance from the given prefix

Deprecated: Please use SuggestOpts() instead

func (*Autocompleter) SuggestOpts 

func (a *Autocompleter) SuggestOpts(prefix string, opts SuggestOptions) (ret []Suggestion, err error)

SuggestOpts gets completion suggestions from the Autocompleter dictionary to the given prefix. SuggestOptions are passed allowing you specify if the returned values contain a payload, and scores. If SuggestOptions.Fuzzy is set, we also complete for prefixes that are in 1 Levenshtein distance from the given prefix

type Client 

type Client struct {
	// contains filtered or unexported fields
}

Client is an interface to redisearch's redis commands

func NewClient 

func NewClient(addr, name string) *Client

NewClient creates a new client connecting to the redis host, and using the given name as key prefix. Addr can be a single host:port pair, or a comma separated list of host:port,host:port... In the case of multiple hosts we create a multi-pool and select connections at random

Example

exemplifies the NewClient function 

package main

import (
	"fmt"
	"log"
	"time"

	"github.com/RediSearch/redisearch-go/v2/redisearch"
)

func main() {
	// Create a client. By default a client is schemaless
	// unless a schema is provided when creating the index
	c := redisearch.NewClient("localhost:6379", "myIndex")

	// Create a schema
	sc := redisearch.NewSchema(redisearch.DefaultOptions).
		AddField(redisearch.NewTextField("body")).
		AddField(redisearch.NewTextFieldOptions("title", redisearch.TextFieldOptions{Weight: 5.0, Sortable: true})).
		AddField(redisearch.NewNumericField("date"))

	// Drop an existing index. If the index does not exist an error is returned
	c.Drop()

	// Create the index with the given schema
	if err := c.CreateIndex(sc); err != nil {
		log.Fatal(err)
	}

	// Create a document with an id and given score
	doc := redisearch.NewDocument("ExampleNewClient:doc1", 1.0)
	doc.Set("title", "Hello world").
		Set("body", "foo bar").
		Set("date", time.Now().Unix())

	// Index the document. The API accepts multiple documents at a time
	if err := c.Index([]redisearch.Document{doc}...); err != nil {
		log.Fatal(err)
	}

	// Wait for all documents to be indexed
	info, _ := c.Info()
	for info.IsIndexing {
		time.Sleep(time.Second)
		info, _ = c.Info()
	}

	// Searching with limit and sorting
	docs, total, err := c.Search(redisearch.NewQuery("hello world").
		Limit(0, 2).
		SetReturnFields("title"))

	fmt.Println(docs[0].Id, docs[0].Properties["title"], total, err)
	

Output:

func NewClientFromPool 

func NewClientFromPool(pool *redis.Pool, name string) *Client

NewClientFromPool creates a new Client with the given pool and index name

Example

exemplifies the NewClientFromPool function 

package main

import (
	"fmt"
	"log"
	"time"

	"github.com/RediSearch/redisearch-go/v2/redisearch"
	"github.com/gomodule/redigo/redis"
)

func main() {
	host := "localhost:6379"
	password := ""
	pool := &redis.Pool{Dial: func() (redis.Conn, error) {
		return redis.Dial("tcp", host, redis.DialPassword(password))
	}}
	c := redisearch.NewClientFromPool(pool, "search-client-1")

	// Create a schema
	sc := redisearch.NewSchema(redisearch.DefaultOptions).
		AddField(redisearch.NewTextField("body")).
		AddField(redisearch.NewTextFieldOptions("title", redisearch.TextFieldOptions{Weight: 5.0, Sortable: true})).
		AddField(redisearch.NewNumericField("date"))

	// Drop an existing index. If the index does not exist an error is returned
	c.Drop()

	// Create the index with the given schema
	if err := c.CreateIndex(sc); err != nil {
		log.Fatal(err)
	}

	// Create a document with an id and given score
	doc := redisearch.NewDocument("ExampleNewClientFromPool:doc2", 1.0)
	doc.Set("title", "Hello world").
		Set("body", "foo bar").
		Set("date", time.Now().Unix())

	// Index the document. The API accepts multiple documents at a time
	if err := c.Index([]redisearch.Document{doc}...); err != nil {
		log.Fatal(err)
	}

	// Searching with limit and sorting
	docs, total, err := c.Search(redisearch.NewQuery("hello world").
		Limit(0, 2).
		SetReturnFields("title"))

	fmt.Println(docs[0].Id, docs[0].Properties["title"], total, err)
	

Output:
Example (Ssl)

Example of how to establish an SSL connection from your app to the RedisAI Server 

package main

import (
	"crypto/tls"
	"crypto/x509"
	"fmt"
	"io/ioutil"
	"log"
	"os"
	"time"

	"github.com/RediSearch/redisearch-go/v2/redisearch"
	"github.com/gomodule/redigo/redis"
)

func main() {
	// Consider the following helper methods that provide us with the connection details (host and password)
	// and the paths for:
	//     tls_cert - A a X.509 certificate to use for authenticating the  server to connected clients, masters or cluster peers. The file should be PEM formatted
	//     tls_key - A a X.509 private key to use for authenticating the  server to connected clients, masters or cluster peers. The file should be PEM formatted
	//	   tls_cacert - A PEM encoded CA's certificate file
	host, password := getConnectionDetails()
	tlsready, tls_cert, tls_key, tls_cacert := getTLSdetails()

	// Skip if we dont have all files to properly connect
	if tlsready == false {
		return
	}

	// Load client cert
	cert, err := tls.LoadX509KeyPair(tls_cert, tls_key)
	if err != nil {
		log.Fatal(err)
	}

	// Load CA cert
	caCert, err := ioutil.ReadFile(tls_cacert)
	if err != nil {
		log.Fatal(err)
	}
	caCertPool := x509.NewCertPool()
	caCertPool.AppendCertsFromPEM(caCert)

	clientTLSConfig := &tls.Config{
		Certificates: []tls.Certificate{cert},
		RootCAs:      caCertPool,
	}

	// InsecureSkipVerify controls whether a client verifies the
	// server's certificate chain and host name.
	// If InsecureSkipVerify is true, TLS accepts any certificate
	// presented by the server and any host name in that certificate.
	// In this mode, TLS is susceptible to man-in-the-middle attacks.
	// This should be used only for testing.
	clientTLSConfig.InsecureSkipVerify = true

	pool := &redis.Pool{Dial: func() (redis.Conn, error) {
		return redis.Dial("tcp", host,
			redis.DialPassword(password),
			redis.DialTLSConfig(clientTLSConfig),
			redis.DialUseTLS(true),
			redis.DialTLSSkipVerify(true),
		)
	}}

	c := redisearch.NewClientFromPool(pool, "search-client-1")

	// Create a schema
	sc := redisearch.NewSchema(redisearch.DefaultOptions).
		AddField(redisearch.NewTextField("body")).
		AddField(redisearch.NewTextFieldOptions("title", redisearch.TextFieldOptions{Weight: 5.0, Sortable: true})).
		AddField(redisearch.NewNumericField("date"))

	// Drop an existing index. If the index does not exist an error is returned
	c.Drop()

	// Create the index with the given schema
	if err := c.CreateIndex(sc); err != nil {
		log.Fatal(err)
	}

	// Create a document with an id and given score
	doc := redisearch.NewDocument("ExampleNewClientFromPool_ssl:doc3", 1.0)
	doc.Set("title", "Hello world").
		Set("body", "foo bar").
		Set("date", time.Now().Unix())

	// Index the document. The API accepts multiple documents at a time
	if err := c.Index([]redisearch.Document{doc}...); err != nil {
		log.Fatal(err)
	}

	// Searching with limit and sorting
	docs, total, err := c.Search(redisearch.NewQuery("hello world").
		Limit(0, 2).
		SetReturnFields("title"))

	fmt.Println(docs[0].Id, docs[0].Properties["title"], total, err)

	// Drop the existing index
	c.Drop()
}

func getConnectionDetails() (host string, password string) {
	value, exists := os.LookupEnv("REDISEARCH_TEST_HOST")
	host = "localhost:6379"
	password = ""
	valuePassword, existsPassword := os.LookupEnv("REDISEARCH_TEST_PASSWORD")
	if exists && value != "" {
		host = value
	}
	if existsPassword && valuePassword != "" {
		password = valuePassword
	}
	return
}

func getTLSdetails() (tlsready bool, tls_cert string, tls_key string, tls_cacert string) {
	tlsready = false
	value, exists := os.LookupEnv("TLS_CERT")
	if exists && value != "" {
		info, err := os.Stat(value)
		if os.IsNotExist(err) || info.IsDir() {
			return
		}
		tls_cert = value
	} else {
		return
	}
	value, exists = os.LookupEnv("TLS_KEY")
	if exists && value != "" {
		info, err := os.Stat(value)
		if os.IsNotExist(err) || info.IsDir() {
			return
		}
		tls_key = value
	} else {
		return
	}
	value, exists = os.LookupEnv("TLS_CACERT")
	if exists && value != "" {
		info, err := os.Stat(value)
		if os.IsNotExist(err) || info.IsDir() {
			return
		}
		tls_cacert = value
	} else {
		return
	}
	tlsready = true
	return
}

Output:

func (*Client) AddField 

func (i *Client) AddField(f Field) error

AddField Adds a new field to the index.

func (*Client) AddHash 

func (i *Client) AddHash(docId string, score float32, language string, replace bool) (string, error)

Adds a document to the index from an existing HASH key in Redis. Deprecated: This function is not longer supported on RediSearch 2.0 and above, use HSET instead See the example ExampleClient_CreateIndexWithIndexDefinition for a deeper understanding on how to move towards using hashes on your application

func (*Client) Aggregate deprecated 

func (i *Client) Aggregate(q *AggregateQuery) (aggregateReply [][]string, total int, err error)

Deprecated: Use AggregateQuery() instead.

func (*Client) AggregateQuery 

func (i *Client) AggregateQuery(q *AggregateQuery) (total int, aggregateReply []map[string]interface{}, err error)

AggregateQuery replaces the Aggregate() function. The reply is slice of maps, with values of either string or []string.

func (*Client) AliasAdd 

func (i *Client) AliasAdd(name string) (err error)

AliasAdd adds an alias to an index. Indexes can have more than one alias, though an alias cannot refer to another alias.

func (*Client) AliasDel 

func (i *Client) AliasDel(name string) (err error)

AliasDel deletes an alias from index.

func (*Client) AliasUpdate 

func (i *Client) AliasUpdate(name string) (err error)

AliasUpdate differs from the AliasAdd in that it will remove the alias association with a previous index, if any. AliasAdd will fail, on the other hand, if the alias is already associated with another index.

func (*Client) CreateIndex 

func (i *Client) CreateIndex(schema *Schema) (err error)

CreateIndex configures the index and creates it on redis

func (*Client) CreateIndexWithIndexDefinition 

func (i *Client) CreateIndexWithIndexDefinition(schema *Schema, definition *IndexDefinition) (err error)

CreateIndexWithIndexDefinition configures the index and creates it on redis IndexDefinition is used to define a index definition for automatic indexing on Hash update

Example

RediSearch 2.0, marks the re-architecture of the way indices are kept in sync with the data. Instead of having to write data through the index (using the FT.ADD command), RediSearch will now follow the data written in hashes and automatically index it. The following example illustrates how to achieve it with the go client 

package main

import (
	"fmt"
	"time"

	"github.com/RediSearch/redisearch-go/v2/redisearch"
	"github.com/gomodule/redigo/redis"
)

func main() {
	host := "localhost:6379"
	password := ""
	pool := &redis.Pool{Dial: func() (redis.Conn, error) {
		return redis.Dial("tcp", host, redis.DialPassword(password))
	}}
	c := redisearch.NewClientFromPool(pool, "products-from-hashes")

	// Create a schema
	schema := redisearch.NewSchema(redisearch.DefaultOptions).
		AddField(redisearch.NewTextFieldOptions("name", redisearch.TextFieldOptions{Sortable: true})).
		AddField(redisearch.NewTextFieldOptions("description", redisearch.TextFieldOptions{Weight: 5.0, Sortable: true})).
		AddField(redisearch.NewNumericField("price"))

	// IndexDefinition is available for RediSearch 2.0+
	// Create a index definition for automatic indexing on Hash updates.
	// In this example we will only index keys started by product:
	indexDefinition := redisearch.NewIndexDefinition().AddPrefix("product:")

	// Add the Index Definition
	c.CreateIndexWithIndexDefinition(schema, indexDefinition)

	// Get a vanilla connection and create 100 hashes
	vanillaConnection := pool.Get()
	for productNumber := 0; productNumber < 100; productNumber++ {
		vanillaConnection.Do("HSET", fmt.Sprintf("product:%d", productNumber), "name", fmt.Sprintf("product name %d", productNumber), "description", "product description", "price", 10.99)
	}

	// Wait for all documents to be indexed
	info, _ := c.Info()
	for info.IsIndexing {
		time.Sleep(time.Second)
		info, _ = c.Info()
	}

	_, total, _ := c.Search(redisearch.NewQuery("description"))

	fmt.Printf("Total documents containing \"description\": %d.\n", total)
}

Output:
Example (Phonetic)

exemplifies the CreateIndex function with phonetic matching on it in searches by default 

package main

import (
	"fmt"
	"time"

	"github.com/gomodule/redigo/redis"

	"github.com/RediSearch/redisearch-go/v2/redisearch"
)

func main() {
	// Create a client
	host := "localhost:6379"
	password := ""
	pool := &redis.Pool{Dial: func() (redis.Conn, error) {
		return redis.Dial("tcp", host, redis.DialPassword(password))
	}}
	c := redisearch.NewClientFromPool(pool, "myPhoneticIndex")

	// Create a schema
	schema := redisearch.NewSchema(redisearch.DefaultOptions).
		AddField(redisearch.NewTextFieldOptions("name", redisearch.TextFieldOptions{Sortable: true, PhoneticMatcher: redisearch.PhoneticDoubleMetaphoneEnglish})).
		AddField(redisearch.NewNumericField("age"))

	// IndexDefinition is available for RediSearch 2.0+
	// Create a index definition for automatic indexing on Hash updates.
	// In this example we will only index keys started by product:
	indexDefinition := redisearch.NewIndexDefinition().AddPrefix("myPhoneticIndex:")

	// Add the Index Definition
	c.CreateIndexWithIndexDefinition(schema, indexDefinition)

	// Create docs with a name that has the same phonetic matcher
	vanillaConnection := pool.Get()
	vanillaConnection.Do("HSET", "myPhoneticIndex:doc1", "name", "Jon", "age", 25)
	// Create a second document with a name that has the same phonetic matcher
	vanillaConnection.Do("HSET", "myPhoneticIndex:doc2", "name", "John", "age", 20)
	// Create a third document with a name that does not have the same phonetic matcher
	vanillaConnection.Do("HSET", "myPhoneticIndex:doc3", "name", "Pieter", "age", 30)

	// Wait for all documents to be indexed
	info, _ := c.Info()
	for info.IsIndexing {
		time.Sleep(time.Second)
		info, _ = c.Info()
	}

	_, total, _ := c.Search(redisearch.NewQuery("Jon").
		SetReturnFields("name"))

	// Verify that the we've received 2 documents ( Jon and John )
	fmt.Printf("Total docs replied %d\n", total)

}

Output:

Total docs replied 2

func (*Client) Delete 

func (i *Client) Delete(docId string, deleteDocument bool) (err error)

Delete the document from the index, optionally delete the actual document WARNING: As of RediSearch 2.0 and above, FT.DEL always deletes the underlying document. Deprecated: This function is deprecated on RediSearch 2.0 and above, use DeleteDocument() instead

func (*Client) DeleteDocument 

func (i *Client) DeleteDocument(docId string) (err error)

DeleteDocument delete the document from the index and also delete the HASH key in which the document is stored

func (*Client) DictAdd 

func (i *Client) DictAdd(dictionaryName string, terms []string) (newTerms int, err error)

DictAdd adds terms to a dictionary.

func (*Client) DictDel 

func (i *Client) DictDel(dictionaryName string, terms []string) (deletedTerms int, err error)

DictDel deletes terms from a dictionary

func (*Client) DictDump 

func (i *Client) DictDump(dictionaryName string) (terms []string, err error)

DictDump dumps all terms in the given dictionary.

func (*Client) Drop 

func (i *Client) Drop() error

Drop deletes the index and all the keys associated with it.

func (*Client) DropIndex 

func (i *Client) DropIndex(deleteDocuments bool) error

Deletes the secondary index and optionally the associated hashes

Available since RediSearch 2.0.

By default, DropIndex() which is a wrapper for RediSearch FT.DROPINDEX does not delete the document hashes associated with the index. Setting the argument deleteDocuments to true deletes the hashes as well.

Example

The following example illustrates an index creation and deletion. By default, DropIndex() which is a wrapper for RediSearch FT.DROPINDEX does not delete the document hashes associated with the index. Setting the argument deleteDocuments to true deletes the hashes as well. Available since RediSearch 2.0 

package main

import (
	"fmt"
	"log"
	"time"

	"github.com/RediSearch/redisearch-go/v2/redisearch"
	"github.com/gomodule/redigo/redis"
)

func main() {

	host := "localhost:6379"
	password := ""
	pool := &redis.Pool{Dial: func() (redis.Conn, error) {
		return redis.Dial("tcp", host, redis.DialPassword(password))
	}}
	c := redisearch.NewClientFromPool(pool, "products-from-hashes")

	// Create a schema
	schema := redisearch.NewSchema(redisearch.DefaultOptions).
		AddField(redisearch.NewTextFieldOptions("name", redisearch.TextFieldOptions{Sortable: true})).
		AddField(redisearch.NewTextFieldOptions("description", redisearch.TextFieldOptions{Weight: 5.0, Sortable: true})).
		AddField(redisearch.NewNumericField("price"))

	// IndexDefinition is available for RediSearch 2.0+
	// Create a index definition for automatic indexing on Hash updates.
	// In this example we will only index keys started by product:
	indexDefinition := redisearch.NewIndexDefinition().AddPrefix("product:")

	// Add the Index Definition
	c.CreateIndexWithIndexDefinition(schema, indexDefinition)

	// Get a vanilla connection and create 100 hashes
	vanillaConnection := pool.Get()
	for productNumber := 0; productNumber < 100; productNumber++ {
		vanillaConnection.Do("HSET", fmt.Sprintf("product:%d", productNumber), "name", fmt.Sprintf("product name %d", productNumber), "description", "product description", "price", 10.99)
	}

	// Wait for all documents to be indexed
	info, _ := c.Info()
	for info.IsIndexing {
		time.Sleep(time.Second)
		info, _ = c.Info()
	}

	// Delete Index and Documents
	err := c.DropIndex(true)
	if err != nil {
		log.Fatal(err)
	}

}

Output:

func (*Client) Explain 

func (i *Client) Explain(q *Query) (string, error)

Explain Return a textual string explaining the query (execution plan)

func (*Client) Get 

func (i *Client) Get(docId string) (doc *Document, err error)

Get - Returns the full contents of a document

func (*Client) GetConfig 

func (i *Client) GetConfig(option string) (map[string]string, error)

Get runtime configuration option value

func (*Client) GetTagVals 

func (i *Client) GetTagVals(index string, filedName string) ([]string, error)

Get the distinct tags indexed in a Tag field

func (*Client) Index 

func (i *Client) Index(docs ...Document) error

Index indexes a list of documents with the default options

func (*Client) IndexOptions 

func (i *Client) IndexOptions(opts IndexingOptions, docs ...Document) error

IndexOptions indexes multiple documents on the index, with optional Options passed to options

func (*Client) Info 

func (i *Client) Info() (*IndexInfo, error)

Info - Get information about the index. This can also be used to check if the index exists

func (*Client) List 

func (i *Client) List() ([]string, error)

Returns a list of all existing indexes.

func (*Client) MultiGet 

func (i *Client) MultiGet(documentIds []string) (docs []*Document, err error)

MultiGet - Returns the full contents of multiple documents. Returns an array with exactly the same number of elements as the number of keys sent to the command. Each element in it is either an Document or nil if it was not found.

func (*Client) Search 

func (i *Client) Search(q *Query) (docs []Document, total int, err error)

Search searches the index for the given query, and returns documents, the total number of results, or an error if something went wrong

Example

The following example illustrates geospatial search using RediSearch. This examples maps to the Redis vanilla example showcased on https://redis.io/commands/georadius#examples. We'll start by adding two docs ( one for each city ) and then do a georadius search based on a starting point and 2 distinct radius: 1)- First query with 100KM radius centered at long,lat 15,37 that should only output the city named "Catania"; 2)- Second query with 200KM radius centered at long,lat 15,37 that should output the cities named "Palermo" and "Catania"; 

package main

import (
	"fmt"
	"log"

	"github.com/RediSearch/redisearch-go/v2/redisearch"
)

func main() {
	// Create a client. By default a client is schemaless
	// unless a schema is provided when creating the index
	c := redisearch.NewClient("localhost:6379", "cityIndex")

	// Create a schema
	sc := redisearch.NewSchema(redisearch.DefaultOptions).
		AddField(redisearch.NewTextField("city")).
		AddField(redisearch.NewGeoField("location"))

	// Drop an existing index. If the index does not exist an error is returned
	c.Drop()

	// Create the index with the given schema
	if err := c.CreateIndex(sc); err != nil {
		log.Fatal(err)
	}

	// Create the city docs
	// Note While Specifying location you should specify in following order -> longitude,latitude
	// Same look and feel as GEOADD https://redis.io/commands/geoadd
	// This example maps to https://redis.io/commands/geoadd#examples
	docPalermo := redisearch.NewDocument("doc:Palermo", 1.0)
	docPalermo.Set("name", "Palermo").
		Set("location", "13.361389,38.115556")

	docCatania := redisearch.NewDocument("doc:Catania", 1.0)
	docCatania.Set("name", "Catania").
		Set("location", "15.087269,37.502669")

	// Index the documents. The API accepts multiple documents at a time
	if err := c.IndexOptions(redisearch.DefaultIndexingOptions, docPalermo, docCatania); err != nil {
		log.Fatal(err)
	}

	// Searching for 100KM radius should only output Catania
	docs, _, _ := c.Search(redisearch.NewQuery("*").AddFilter(
		redisearch.Filter{
			Field: "location",
			Options: redisearch.GeoFilterOptions{
				Lon:    15,
				Lat:    37,
				Radius: 100,
				Unit:   redisearch.KILOMETERS,
			},
		},
	).Limit(0, 2))

	fmt.Println("100KM Radius search from longitude 15 latitude 37")
	fmt.Println(docs[0])

	// Searching for 200KM radius should output Catania and Palermo
	docs, _, _ = c.Search(redisearch.NewQuery("*").AddFilter(
		redisearch.Filter{
			Field: "location",
			Options: redisearch.GeoFilterOptions{
				Lon:    15,
				Lat:    37,
				Radius: 200,
				Unit:   redisearch.KILOMETERS,
			},
		},
	).Limit(0, 2).SetSortBy("location", true))
	fmt.Println("200KM Radius search from longitude 15 latitude 37")
	fmt.Println(docs[0])
	fmt.Println(docs[1])

}

Output:

100KM Radius search from longitude 15 latitude 37
{doc:Catania 1 [] map[location:15.087269,37.502669 name:Catania]}
200KM Radius search from longitude 15 latitude 37
{doc:Palermo 1 [] map[location:13.361389,38.115556 name:Palermo]}
{doc:Catania 1 [] map[location:15.087269,37.502669 name:Catania]}

func (*Client) SetConfig 

func (i *Client) SetConfig(option string, value string) (string, error)

Set runtime configuration option

func (*Client) SpellCheck 

func (i *Client) SpellCheck(q *Query, s *SpellCheckOptions) (suggs []MisspelledTerm, total int, err error)

SpellCheck performs spelling correction on a query, returning suggestions for misspelled terms, the total number of results, or an error if something went wrong

func (*Client) SynAdd 

func (i *Client) SynAdd(indexName string, terms []string) (int64, error)

SynAdd adds a synonym group. Deprecated: This function is not longer supported on RediSearch 2.0 and above, use SynUpdate instead

func (*Client) SynDump 

func (i *Client) SynDump(indexName string) (map[string][]int64, error)

SynDump dumps the contents of a synonym group.

func (*Client) SynUpdate 

func (i *Client) SynUpdate(indexName string, synonymGroupId int64, terms []string) (string, error)

SynUpdate updates a synonym group, with additional terms.

type ConnPool 

type ConnPool interface {
	Get() redis.Conn
	Close() error
}

type Cursor 

type Cursor struct {
	Id      int
	Count   int
	MaxIdle int
}

Cursor

func NewCursor 

func NewCursor() *Cursor

func (Cursor) Serialize 

func (c Cursor) Serialize() redis.Args

func (*Cursor) SetCount 

func (c *Cursor) SetCount(count int) *Cursor

func (*Cursor) SetId 

func (c *Cursor) SetId(id int) *Cursor

func (*Cursor) SetMaxIdle 

func (c *Cursor) SetMaxIdle(maxIdle int) *Cursor

type Document 

type Document struct {
	Id         string
	Score      float32
	Payload    []byte
	Properties map[string]interface{}
}

Document represents a single document to be indexed or returned from a query. Besides a score and id, the Properties are completely arbitrary

func NewDocument 

func NewDocument(id string, score float32) Document

NewDocument creates a document with the specific id and score

func (*Document) EstimateSize 

func (d *Document) EstimateSize() (sz int)

func (Document) Set 

func (d Document) Set(name string, value interface{}) Document

Set sets a property and its value in the document

func (*Document) SetPayload 

func (d *Document) SetPayload(payload []byte)

SetPayload Sets the document payload

type DocumentList 

type DocumentList []Document

DocumentList is used to sort documents by descending score

func (DocumentList) Len 

func (l DocumentList) Len() int

Len returns the length of the DocumentList

func (DocumentList) Less 

func (l DocumentList) Less(i, j int) bool

func (DocumentList) Sort 

func (l DocumentList) Sort()

Sort the DocumentList

func (DocumentList) Swap 

func (l DocumentList) Swap(i, j int)

Swap two documents in the list by their index

type Field 

type Field struct {
	Name     string
	Type     FieldType
	Sortable bool
	Options  interface{}
}

Field represents a single field's Schema

func NewGeoField 

func NewGeoField(name string) Field

NewGeoField creates a new geo field with the given name

func NewGeoFieldOptions 

func NewGeoFieldOptions(name string, options GeoFieldOptions) Field

NewGeoFieldOptions creates a new geo field with the given name and additional options

func NewNumericField 

func NewNumericField(name string) Field

NewNumericField creates a new numeric field with the given name

func NewNumericFieldOptions 

func NewNumericFieldOptions(name string, options NumericFieldOptions) Field

NewNumericFieldOptions defines a numeric field with additional options

func NewSortableNumericField 

func NewSortableNumericField(name string) Field

NewSortableNumericField creates a new numeric field with the given name and a sortable flag

func NewSortableTextField 

func NewSortableTextField(name string, weight float32) Field

NewSortableTextField creates a text field with the sortable flag set

func NewTagField 

func NewTagField(name string) Field

NewTagField creates a new text field with default options (separator: ,)

func NewTagFieldOptions 

func NewTagFieldOptions(name string, opts TagFieldOptions) Field

NewTagFieldOptions creates a new tag field with the given options

func NewTextField 

func NewTextField(name string) Field

NewTextField creates a new text field with the given weight

func NewTextFieldOptions 

func NewTextFieldOptions(name string, opts TextFieldOptions) Field

NewTextFieldOptions creates a new text field with given options (weight/sortable)

func NewVectorFieldOptions 

func NewVectorFieldOptions(name string, options VectorFieldOptions) Field

NewVectorFieldOptions creates a new geo field with the given name and additional options

type FieldType 

type FieldType int

FieldType is an enumeration of field/property types 

const (
	// TextField full-text field
	TextField FieldType = iota

	// NumericField numeric range field
	NumericField

	// GeoField geo-indexed point field
	GeoField

	// TagField is a field used for compact indexing of comma separated values
	TagField

	//VectorField allows vector similarity queries against the value in this attribute.
	VectorField
)

Field Types

type Filter 

type Filter struct {
	Field   string
	Options interface{}
}

Common filter

type Flag 

type Flag uint64

Flag is a type for query flags 

const (
	// Treat the terms verbatim and do not perform expansion
	QueryVerbatim Flag = 0x1

	// Do not load any content from the documents, return just IDs
	QueryNoContent Flag = 0x2

	// Fetch document scores as well as IDs and fields
	QueryWithScores Flag = 0x4

	// The query terms must appear in order in the document
	QueryInOrder Flag = 0x08

	// Fetch document payloads as well as fields. See documentation for payloads on redisearch.io
	QueryWithPayloads Flag = 0x10

	// The query will not filter stopwords
	QueryWithStopWords Flag = 0x20

	DefaultOffset = 0
	DefaultNum    = 10
)

Query Flags

type GeoFieldOptions 

type GeoFieldOptions struct {
	NoIndex bool
	As      string
}

GeoFieldOptions Options for geo fields

type GeoFilterOptions 

type GeoFilterOptions struct {
	Lon    float64
	Lat    float64
	Radius float64
	Unit   Unit
}

FilterExpression the results to a given radius from lon and lat. Radius is given as a number and units

type GroupBy 

type GroupBy struct {
	Fields   []string
	Reducers []Reducer
	Paging   *Paging
}

GroupBy groups the results in the pipeline based on one or more properties. Each group should have at least one reducer, a function that handles the group entries, either counting them, or performing multiple aggregate operations.

func NewGroupBy 

func NewGroupBy() *GroupBy

NewGroupBy creates a new GroupBy object

func (*GroupBy) AddFields 

func (g *GroupBy) AddFields(fields interface{}) *GroupBy

AddFields to the group. Can be single string or list of strings.

func (*GroupBy) Limit 

func (g *GroupBy) Limit(offset int, num int) *GroupBy

Limit adds Paging to the GroupBy object

func (*GroupBy) Reduce 

func (g *GroupBy) Reduce(reducer Reducer) *GroupBy

Reduce adds reducer to the group's list

func (GroupBy) Serialize 

func (g GroupBy) Serialize() redis.Args

type GroupByReducers 

type GroupByReducers string

GroupByReducers

type HighlightOptions 

type HighlightOptions struct {
	Fields []string
	Tags   [2]string
}

HighlightOptions represents the options to higlight specific document fields. See http://redisearch.io/Highlight/

type IndexDefinition 

type IndexDefinition struct {
	IndexOn          string
	Async            bool
	Prefix           []string
	FilterExpression string
	Language         string
	LanguageField    string
	Score            float64
	ScoreField       string
	PayloadField     string
}

IndexDefinition is used to define a index definition for automatic indexing on Hash update This is only valid for >= RediSearch 2.0

func NewIndexDefinition 

func NewIndexDefinition() *IndexDefinition

This is only valid for >= RediSearch 2.0

func (*IndexDefinition) AddPrefix 

func (defintion *IndexDefinition) AddPrefix(prefix string) (outDef *IndexDefinition)

This is only valid for >= RediSearch 2.0

func (*IndexDefinition) Serialize 

func (defintion *IndexDefinition) Serialize(args redis.Args) redis.Args

This is only valid for >= RediSearch 2.0

func (*IndexDefinition) SetAsync 

func (defintion *IndexDefinition) SetAsync(value bool) (outDef *IndexDefinition)

This is only valid for >= RediSearch 2.0

func (*IndexDefinition) SetFilterExpression 

func (defintion *IndexDefinition) SetFilterExpression(value string) (outDef *IndexDefinition)

func (*IndexDefinition) SetIndexOn 

func (defintion *IndexDefinition) SetIndexOn(value IndexType) (outDef *IndexDefinition)

This is only valid for >= RediSearch 2.2

func (*IndexDefinition) SetLanguage 

func (defintion *IndexDefinition) SetLanguage(value string) (outDef *IndexDefinition)

This is only valid for >= RediSearch 2.0

func (*IndexDefinition) SetLanguageField 

func (defintion *IndexDefinition) SetLanguageField(value string) (outDef *IndexDefinition)

This is only valid for >= RediSearch 2.0

func (*IndexDefinition) SetPayloadField 

func (defintion *IndexDefinition) SetPayloadField(value string) (outDef *IndexDefinition)

This is only valid for >= RediSearch 2.0

func (*IndexDefinition) SetScore 

func (defintion *IndexDefinition) SetScore(value float64) (outDef *IndexDefinition)

This is only valid for >= RediSearch 2.0

func (*IndexDefinition) SetScoreField 

func (defintion *IndexDefinition) SetScoreField(value string) (outDef *IndexDefinition)

This is only valid for >= RediSearch 2.0

type IndexInfo 

type IndexInfo struct {
	Schema               Schema
	Name                 string  `redis:"index_name"`
	DocCount             uint64  `redis:"num_docs"`
	RecordCount          uint64  `redis:"num_records"`
	TermCount            uint64  `redis:"num_terms"`
	MaxDocID             uint64  `redis:"max_doc_id"`
	InvertedIndexSizeMB  float64 `redis:"inverted_sz_mb"`
	OffsetVectorSizeMB   float64 `redis:"offset_vector_sz_mb"`
	DocTableSizeMB       float64 `redis:"doc_table_size_mb"`
	KeyTableSizeMB       float64 `redis:"key_table_size_mb"`
	RecordsPerDocAvg     float64 `redis:"records_per_doc_avg"`
	BytesPerRecordAvg    float64 `redis:"bytes_per_record_avg"`
	OffsetsPerTermAvg    float64 `redis:"offsets_per_term_avg"`
	OffsetBitsPerTermAvg float64 `redis:"offset_bits_per_record_avg"`
	IsIndexing           bool    `redis:"indexing"`
	PercentIndexed       float64 `redis:"percent_indexed"`
	HashIndexingFailures uint64  `redis:"hash_indexing_failures"`
}

IndexInfo - Structure showing information about an existing index

type IndexType 

type IndexType int

IndexType - Enum of existing index types 

const (
	HASH IndexType = iota
	JSON
)

func (IndexType) String 

func (it IndexType) String() string

Parse IndexType enum to string

type IndexingOptions 

type IndexingOptions struct {

	// If set, we use a stemmer for the supplied language during indexing. If set to "", we Default to English.
	Language string

	// If set to true, we will not save the actual document in the database and only index it.
	// As of RediSearch 2.0 and above NOSAVE is no longer supported, and will have no effect
	NoSave bool

	//  If set, we will do an UPSERT style insertion - and delete an older version of the document if it exists.
	Replace bool

	// (only applicable with Replace): If set, you do not have to specify all fields for reindexing.
	Partial bool

	// Applicable only in conjunction with Replace and optionally Partial
	// Update the document only if a boolean expression applies to the document before the update
	ReplaceCondition string
}

IndexingOptions represent the options for indexing a single document

type MisspelledSuggestion 

type MisspelledSuggestion struct {
	Suggestion string
	Score      float32
}

MisspelledSuggestion is a single suggestion from the spelling corrections

func NewMisspelledSuggestion 

func NewMisspelledSuggestion(term string, score float32) MisspelledSuggestion

NewMisspelledSuggestion creates a MisspelledSuggestion with the specific term and score

type MisspelledTerm 

type MisspelledTerm struct {
	Term string
	// MisspelledSuggestionList is a sortable list of suggestions returned from an engine
	MisspelledSuggestionList []MisspelledSuggestion
}

MisspelledTerm contains the misspelled term and a sortable list of suggestions returned from an engine

func NewMisspelledTerm 

func NewMisspelledTerm(term string) MisspelledTerm

func (MisspelledTerm) Len 

func (l MisspelledTerm) Len() int

Len returns the length of the MisspelledSuggestionList

func (MisspelledTerm) Less 

func (l MisspelledTerm) Less(i, j int) bool

func (MisspelledTerm) Sort 

func (l MisspelledTerm) Sort()

Sort the SuggestionList

func (MisspelledTerm) Swap 

func (l MisspelledTerm) Swap(i, j int)

Swap two suggestions in the list

type MultiError 

type MultiError []error

MultiError Represents one or more errors

func NewMultiError 

func NewMultiError(len int) MultiError

NewMultiError initializes a multierror with the given len, and all sub-errors set to nil

func (MultiError) Error 

func (e MultiError) Error() string

Error returns a string representation of the error, in this case it just chains all the sub errors if they are not nil

type MultiHostPool 

type MultiHostPool struct {
	sync.Mutex
	// contains filtered or unexported fields
}

func NewMultiHostPool 

func NewMultiHostPool(hosts []string) *MultiHostPool

func (*MultiHostPool) Close 

func (p *MultiHostPool) Close() (err error)

func (*MultiHostPool) Get 

func (p *MultiHostPool) Get() redis.Conn

type NumericFieldOptions 

type NumericFieldOptions struct {
	Sortable bool
	NoIndex  bool
	As       string
}

NumericFieldOptions Options for numeric fields

type NumericFilterOptions 

type NumericFilterOptions struct {
	Min          float64
	ExclusiveMin bool
	Max          float64
	ExclusiveMax bool
}

Limit results to those having numeric values ranging between min and max. min and max follow ZRANGE syntax, and can be -inf, +inf

type Operator 

type Operator string
const (
	Eq Operator = "="

	Gt  Operator = ">"
	Gte Operator = ">="

	Lt  Operator = "<"
	Lte Operator = "<="

	Between          Operator = "BETWEEN"
	BetweenInclusive Operator = "BETWEEEN_EXCLUSIVE"
)

type Options 

type Options struct {

	// If set, we will not save the documents contents, just index them, for fetching ids only.
	NoSave bool

	// If set, we avoid saving field bits for each term.
	// This saves memory, but does not allow filtering by specific fields.
	// This is an option that is applied and index level.
	NoFieldFlags bool

	// If set, we avoid saving the term frequencies in the index.
	// This saves memory but does not allow sorting based on the frequencies of a given term within the document.
	// This is an option that is applied and index level.
	NoFrequencies bool

	// If set, we avoid saving the term offsets for documents.
	// This saves memory but does not allow exact searches or highlighting. Implies NOHL
	// This is an option that is applied and index level.
	NoOffsetVectors bool

	// Set the index with a custom stop-words list, to be ignored during indexing and search time
	// This is an option that is applied and index level.
	// If the list is nil the default stop-words list is used.
	// See https://oss.redislabs.com/redisearch/Stopwords.html#default_stop-word_list
	Stopwords []string

	// If set to true, creates a lightweight temporary index which will expire after the specified period of inactivity.
	// The internal idle timer is reset whenever the index is searched or added to.
	// Because such indexes are lightweight, you can create thousands of such indexes without negative performance implications.
	Temporary       bool
	TemporaryPeriod int

	// For efficiency, RediSearch encodes indexes differently if they are created with less than 32 text fields.
	// If set to true This option forces RediSearch to encode indexes as if there were more than 32 text fields,
	// which allows you to add additional fields (beyond 32).
	MaxTextFieldsFlag bool

	// If set to true, conserves storage space and memory by disabling highlighting support.
	// Also implied by NoOffsetVectors
	NoHighlights bool

	// If set to true, we do not scan and index.
	SkipInitialScan bool
}

Options are flags passed to the the abstract Index call, which receives them as interface{}, allowing for implementation specific options

func NewOptions 

func NewOptions() *Options

func (*Options) SetMaxTextFieldsFlag 

func (options *Options) SetMaxTextFieldsFlag(flag bool) *Options

For efficiency, RediSearch encodes indexes differently if they are created with less than 32 text fields. If set to true, this flag forces RediSearch to encode indexes as if there were more than 32 text fields, which allows you to add additional fields (beyond 32).

func (*Options) SetNoHighlight 

func (options *Options) SetNoHighlight(flag bool) *Options

SetNoHighlight conserves storage space and memory by disabling highlighting support.

func (*Options) SetSkipInitialScan 

func (options *Options) SetSkipInitialScan(flag bool) *Options

SetSkipInitialScan determines if scan the index on creation

func (*Options) SetStopWords 

func (options *Options) SetStopWords(stopwords []string) *Options

Set the index with a custom stop-words list, to be ignored during indexing and search time This is an option that is applied and index level. If the list is nil the default stop-words list is used. See https://oss.redislabs.com/redisearch/Stopwords.html#default_stop-word_list

func (*Options) SetTemporary 

func (options *Options) SetTemporary(temporary bool) *Options

If set to true, creates a lightweight temporary index which will expire after the specified period of inactivity. The internal idle timer is reset whenever the index is searched or added to. To enable the temporary index creation, use SetTemporaryPeriod(). This method should be preferably used for disabling the flag

func (*Options) SetTemporaryPeriod 

func (options *Options) SetTemporaryPeriod(period int) *Options

If set to a positive integer, creates a lightweight temporary index which will expire after the specified period of inactivity (in seconds). The internal idle timer is reset whenever the index is searched or added to.

type Paging 

type Paging struct {
	Offset int
	Num    int
}

Paging represents the offset paging of a search result

func NewPaging 

func NewPaging(offset int, num int) *Paging

type PhoneticMatcherType 

type PhoneticMatcherType string

PhoneticMatcherType is an enumeration of the phonetic algorithm and language used. 

const (
	PhoneticDoubleMetaphoneEnglish    PhoneticMatcherType = "dm:en"
	PhoneticDoubleMetaphoneFrench     PhoneticMatcherType = "dm:fr"
	PhoneticDoubleMetaphonePortuguese PhoneticMatcherType = "dm:pt"
	PhoneticDoubleMetaphoneSpanish    PhoneticMatcherType = "dm:es"
)

Phonetic Matchers

type Predicate 

type Predicate struct {
	Property string
	Operator Operator
	Value    []interface{}
}

func Equals 

func Equals(property string, value interface{}) Predicate

func GreaterThan 

func GreaterThan(property string, value interface{}) Predicate

func GreaterThanEquals 

func GreaterThanEquals(property string, value interface{}) Predicate

func InRange 

func InRange(property string, min, max interface{}, inclusive bool) Predicate

func LessThan 

func LessThan(property string, value interface{}) Predicate

func LessThanEquals 

func LessThanEquals(property string, value interface{}) Predicate

func NewPredicate 

func NewPredicate(property string, operator Operator, values ...interface{}) Predicate

type Projection 

type Projection struct {
	Expression string
	Alias      string
}

Projection - Apply a 1-to-1 transformation on one or more properties, and either store the result as a new property down the pipeline, or replace any property using this transformation. Expression is an expression that can be used to perform arithmetic operations on numeric properties, or functions that can be applied on properties depending on their types, or any combination thereof.

func NewProjection 

func NewProjection(expression string, alias string) *Projection

func (Projection) Serialize 

func (p Projection) Serialize() redis.Args

type Query 

type Query struct {
	Raw string

	Paging Paging
	Flags  Flag
	Slop   *int

	Filters       []Filter
	InKeys        []string
	InFields      []string
	ReturnFields  []string
	Language      string
	Expander      string
	Scorer        string
	Payload       []byte
	SortBy        *SortingKey
	HighlightOpts *HighlightOptions
	SummarizeOpts *SummaryOptions
	Params        map[string]interface{}
	Dialect       int
}

Query is a single search query containing all its parameters and predicates

func NewQuery 

func NewQuery(raw string) *Query

NewQuery creates a new query for a given index with the given search term. For currently the index parameter is ignored

func (*Query) AddFilter 

func (q *Query) AddFilter(f Filter) *Query

AddFilter adds a filter to the query.

func (*Query) AddParam 

func (q *Query) AddParam(name string, value interface{}) *Query

AddParam adds a new param to the parameters list

func (*Query) AddReturnField 

func (q *Query) AddReturnField(field string, asName string) *Query

AddReturnField adds a single field with AS name that should be returned from each result to the ReturnFields property

func (*Query) AddReturnFields 

func (q *Query) AddReturnFields(fields ...string) *Query

AddReturnFields adds the fields that should be returned from each result to the ReturnFields property

func (*Query) Highlight 

func (q *Query) Highlight(fields []string, openTag, closeTag string) *Query

Highlight sets highighting on given fields. Highlighting marks all the query terms with the given open and close tags (i.e. <b> and </b> for HTML)

func (*Query) Limit 

func (q *Query) Limit(offset, num int) *Query

Limit sets the paging offset and limit for the query you can use LIMIT 0 0 to count the number of documents in the resultset without actually returning them

func (*Query) SetDialect 

func (q *Query) SetDialect(dialect int) *Query

SetDialect can have one of 2 options: 1 or 2

func (*Query) SetExpander 

func (q *Query) SetExpander(exp string) *Query

SetExpander sets a custom user query expander to be used

func (*Query) SetFlags 

func (q *Query) SetFlags(flags Flag) *Query

SetFlags sets the query's optional flags

func (*Query) SetInFields 

func (q *Query) SetInFields(fields ...string) *Query

SetInFields sets the INFIELDS argument of the query - filter the results to ones appearing only in specific fields of the document

func (*Query) SetInKeys 

func (q *Query) SetInKeys(keys ...string) *Query

SetInKeys sets the INKEYS argument of the query - limiting the search to a given set of IDs

func (*Query) SetLanguage 

func (q *Query) SetLanguage(lang string) *Query

SetLanguage sets the query language, used by the stemmer to expand the query

func (*Query) SetParams 

func (q *Query) SetParams(params map[string]interface{}) *Query

SetParams sets parameters that can be referenced in the query string by a $ , followed by the parameter name, e.g., $user , and each such reference in the search query to a parameter name is substituted by the corresponding parameter value.

func (*Query) SetPayload 

func (q *Query) SetPayload(payload []byte) *Query

SetPayload sets a binary payload to the query, that can be used by custom scoring functions

func (*Query) SetReturnFields 

func (q *Query) SetReturnFields(fields ...string) *Query

SetReturnFields sets the fields that should be returned from each result. By default we return everything

func (*Query) SetScorer 

func (q *Query) SetScorer(scorer string) *Query

SetScorer sets an alternative scoring function to be used. The only pre-compiled supported one at the moment is DISMAX

func (*Query) SetSortBy 

func (q *Query) SetSortBy(field string, ascending bool) *Query

SetSortBy sets the sorting key for the query

func (*Query) Summarize 

func (q *Query) Summarize(fields ...string) *Query

Summarize sets summarization on the given list of fields. It will instruct the engine to extract the most relevant snippets from the fields and return them as the field content. This function works with the default values of the engine, and only sets the fields. There is a function that accepts all options - SummarizeOptions

func (*Query) SummarizeOptions 

func (q *Query) SummarizeOptions(opts SummaryOptions) *Query

SummarizeOptions sets summarization on the given list of fields. It will instruct the engine to extract the most relevant snippets from the fields and return them as the field content.

This function accepts advanced settings for snippet length, separators and number of snippets

type Reducer 

type Reducer struct {
	Name  GroupByReducers
	Alias string
	Args  []string
}

Reducer represents an index schema Schema, or how the index would treat documents sent to it.

func NewReducer 

func NewReducer(name GroupByReducers, args []string) *Reducer

NewReducer creates a new Reducer object

func NewReducerAlias 

func NewReducerAlias(name GroupByReducers, args []string, alias string) *Reducer

NewReducer creates a new Reducer object

func (Reducer) Serialize 

func (r Reducer) Serialize() redis.Args

func (*Reducer) SetAlias 

func (r *Reducer) SetAlias(a string) *Reducer

func (*Reducer) SetArgs 

func (r *Reducer) SetArgs(args []string) *Reducer

func (*Reducer) SetName 

func (r *Reducer) SetName(reducer GroupByReducers) *Reducer

type Schema 

type Schema struct {
	Fields  []Field
	Options Options
}

Schema represents an index schema Schema, or how the index would treat documents sent to it.

func NewSchema 

func NewSchema(opts Options) *Schema

NewSchema creates a new Schema object

func (*Schema) AddField 

func (m *Schema) AddField(f Field) *Schema

AddField adds a field to the Schema object

type SingleHostPool 

type SingleHostPool struct {
	*redis.Pool
}

func NewSingleHostPool 

func NewSingleHostPool(host string) *SingleHostPool

type SortingKey 

type SortingKey struct {
	Field     string
	Ascending bool
}

SortingKey represents the sorting option if the query needs to be sorted based on a sortable fields and not a ranking function. See http://redisearch.io/Sorting/

func NewSortingKeyDir 

func NewSortingKeyDir(field string, ascending bool) *SortingKey

func (SortingKey) Serialize 

func (s SortingKey) Serialize() redis.Args

type SpellCheckOptions 

type SpellCheckOptions struct {
	Distance       int
	ExclusionDicts []string
	InclusionDicts []string
}

SpellCheckOptions are options which are passed when performing spelling correction on a query

func NewSpellCheckOptions 

func NewSpellCheckOptions(distance int) *SpellCheckOptions

func NewSpellCheckOptionsDefaults 

func NewSpellCheckOptionsDefaults() *SpellCheckOptions

func (*SpellCheckOptions) AddExclusionDict 

func (s *SpellCheckOptions) AddExclusionDict(dictname string) *SpellCheckOptions

AddExclusionDict adds a custom dictionary named {dictname} to the exclusion list

func (*SpellCheckOptions) AddInclusionDict 

func (s *SpellCheckOptions) AddInclusionDict(dictname string) *SpellCheckOptions

AddInclusionDict adds a custom dictionary named {dictname} to the inclusion list

func (*SpellCheckOptions) SetDistance 

func (s *SpellCheckOptions) SetDistance(distance int) (*SpellCheckOptions, error)

SetDistance Sets the the maximal Levenshtein distance for spelling suggestions (default: 1, max: 4)

type SuggestOptions 

type SuggestOptions struct {
	Num          int
	Fuzzy        bool
	WithPayloads bool
	WithScores   bool
}

SuggestOptions are options which are passed when recieving suggestions from the Autocompleter

type Suggestion 

type Suggestion struct {
	Term    string
	Score   float64
	Payload string
	Incr    bool
}

Suggestion is a single suggestion being added or received from the Autocompleter

func ProcessSugGetVals 

func ProcessSugGetVals(vals []string, inc int, WithScores, WithPayloads bool) (ret []Suggestion)

type SuggestionList 

type SuggestionList []Suggestion

SuggestionList is a sortable list of suggestions returned from an engine

func (SuggestionList) Len 

func (l SuggestionList) Len() int

func (SuggestionList) Less 

func (l SuggestionList) Less(i, j int) bool

func (SuggestionList) Sort 

func (l SuggestionList) Sort()

Sort the SuggestionList

func (SuggestionList) Swap 

func (l SuggestionList) Swap(i, j int)

type SummaryOptions 

type SummaryOptions struct {
	Fields       []string
	FragmentLen  int    // default 20
	NumFragments int    // default 3
	Separator    string // default "..."
}

SummaryOptions represents the configuration used to create field summaries. See http://redisearch.io/Highlight/

type TagFieldOptions 

type TagFieldOptions struct {
	// Separator is the custom separator between tags. defaults to comma (,)
	Separator     byte
	NoIndex       bool
	Sortable      bool
	CaseSensitive bool
	As            string
}

TagFieldOptions options for indexing tag fields

type TextFieldOptions 

type TextFieldOptions struct {
	Weight          float32
	Sortable        bool
	NoStem          bool
	NoIndex         bool
	PhoneticMatcher PhoneticMatcherType
	As              string
}

TextFieldOptions Options for text fields - weight and stemming enabled/disabled.

type Unit 

type Unit string

units of Radius 

const (
	KILOMETERS Unit = "km"
	METERS     Unit = "m"
	FEET       Unit = "ft"
	MILES      Unit = "mi"
)

type VectorFieldOptions 

type VectorFieldOptions struct {
	Algorithm  algorithm
	Attributes map[string]interface{}
}

VectorFieldOptions Options for vector fields

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