schema

package
v1.0.0-alpha.52 Latest Latest
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 Go to latest Published: Sep 17, 2022 License: Apache-2.0 Imports: 16 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	PrimaryKeyIndexName = "pkey"
	AutoPrimaryKeyF     = "id"
	PrimaryKeySchemaK   = "primary_key"
	// DateTimeFormat represents the supported date time format
	DateTimeFormat  = time.RFC3339Nano
	CollectionTypeF = "collection_type"
)
View Source 
const (
	ObjFlattenDelimiter = "."
)
View Source 
const (
	SearchId = "id"
)

Variables

View Source 
var (
	MsgFieldNameAsLanguageKeyword = "Invalid collection field name, It contains language keyword for fieldName = '%s'"
	MsgFieldNameInvalidPattern    = "" /* 131-byte string literal not displayed */
	ValidFieldNamePattern         = regexp.MustCompile(`^[a-zA-Z_$][a-zA-Z0-9_$]*$`)
)
View Source 
var (
	ErrMissingField           = errors.InvalidArgument("removing a field is a backward incompatible change")
	ErrCollectionNameMismatch = errors.InvalidArgument("mismatch in the collection name")
)
View Source 
var FieldNames = [...]string{
	UnknownType:  "unknown",
	NullType:     "null",
	BoolType:     "bool",
	Int32Type:    "int32",
	Int64Type:    "int64",
	DoubleType:   "double",
	StringType:   "string",
	ByteType:     "byte",
	UUIDType:     "uuid",
	DateTimeType: "datetime",
	ArrayType:    "array",
	ObjectType:   "object",
}
View Source 
var ReservedFields = [...]string{
	CreatedAt:           "created_at",
	UpdatedAt:           "updated_at",
	Metadata:            "metadata",
	IdToSearchKey:       "_tigris_id",
	DateSearchKeyPrefix: "_tigris_date_",
}
View Source 
var SupportedFieldProperties = container.NewHashSet(
	"type",
	"format",
	"items",
	"maxLength",
	"description",
	"contentEncoding",
	"properties",
	"autoGenerate",
)

Functions

func ApplySchemaRules 

func ApplySchemaRules(existing *DefaultCollection, current *Factory) error

ApplySchemaRules is to validate incoming collection request against the existing present collection. It performs following validations,

  • Primary Key Changed, or order of fields part of the primary key is changed
  • Collection name change
  • Type of existing field is changed
  • A validation on field property is also applied like for instance if existing field has some property, but it is removed in the new schema
  • Removing a field
  • Any index exist on the collection will also have same checks like type, etc

func FacetableField 

func FacetableField(fieldType FieldType) bool

func GetSearchDeltaFields 

func GetSearchDeltaFields(existingFields []*QueryableField, incomingFields []*Field) []tsApi.Field

func IndexableField 

func IndexableField(fieldType FieldType) bool

func IsReservedField 

func IsReservedField(name string) bool

func IsSearchID 

func IsSearchID(name string) bool

func IsValidIndexType 

func IsValidIndexType(t FieldType) bool

func SortableField 

func SortableField(fieldType FieldType) bool

func ToSearchDateKey 

func ToSearchDateKey(key string) string

ToSearchDateKey can be used to generate storage field for search backend Original date strings are persisted as it is under this field

Types

type CollectionType 

type CollectionType string
const (
	DocumentsType CollectionType = "documents"
	MessagesType  CollectionType = "messages"
)

func GetCollectionType 

func GetCollectionType(reqSchema jsoniter.RawMessage) (CollectionType, error)

type DefaultCollection 

type DefaultCollection struct {
	// Id is the dictionary encoded value for this collection.
	Id uint32
	// SchVer returns the schema version
	SchVer int32
	// Name is the name of the collection.
	Name string
	// Fields are derived from the user schema.
	Fields []*Field
	// Indexes is a wrapper on the indexes part of this collection.
	Indexes *Indexes
	// Validator is used to validate the JSON document. As it is expensive to create this, it is only created once
	// during constructor of the collection.
	Validator *jsonschema.Schema
	// JSON schema
	Schema jsoniter.RawMessage
	// search schema
	Search *tsApi.CollectionSchema
	// QueryableFields are similar to Fields but these are flattened forms of fields. For instance, a simple field
	// will be one to one mapped to queryable field but complex fields like object type field there may be more than
	// one queryableFields. As queryableFields represent a flattened state these can be used as-is to index in memory.
	QueryableFields []*QueryableField
	// CollectionType is the type of the collection. Only two types of collections are supported "messages" and "documents"
	CollectionType CollectionType
}

DefaultCollection is used to represent a collection. The tenant in the metadata package is responsible for creating the collection.

func NewDefaultCollection 

func NewDefaultCollection(name string, id uint32, schVer int, ctype CollectionType, fields []*Field, indexes *Indexes, schema jsoniter.RawMessage, searchCollectionName string) *DefaultCollection

func (*DefaultCollection) GetFields 

func (d *DefaultCollection) GetFields() []*Field

func (*DefaultCollection) GetIndexes 

func (d *DefaultCollection) GetIndexes() *Indexes

func (*DefaultCollection) GetName 

func (d *DefaultCollection) GetName() string

func (*DefaultCollection) GetQueryableField 

func (d *DefaultCollection) GetQueryableField(name string) (*QueryableField, error)

func (*DefaultCollection) GetQueryableFields 

func (d *DefaultCollection) GetQueryableFields() []*QueryableField

func (*DefaultCollection) GetVersion 

func (d *DefaultCollection) GetVersion() int32

func (*DefaultCollection) SearchCollectionName 

func (d *DefaultCollection) SearchCollectionName() string

func (*DefaultCollection) Type 

func (d *DefaultCollection) Type() CollectionType

func (*DefaultCollection) Validate 

func (d *DefaultCollection) Validate(document interface{}) error

Validate expects an unmarshalled document which it will validate again the schema of this collection.

type Factory 

type Factory struct {
	// Name is the collection name of this schema.
	Name string
	// Fields are derived from the user schema.
	Fields []*Field
	// Indexes is a wrapper on the indexes part of this collection. At this point the dictionary encoded value is not
	// set for these indexes which is set as part of collection creation.
	Indexes *Indexes
	// Schema is the raw JSON schema received as part of CreateOrUpdateCollection request. This is stored as-is in the
	// schema subspace.
	Schema jsoniter.RawMessage
	// CollectionType is the type of the collection. Only two types of collections are supported "messages" and "documents"
	CollectionType CollectionType
}

Factory is used as an intermediate step so that collection can be initialized with properly encoded values.

func Build 

func Build(collection string, reqSchema jsoniter.RawMessage) (*Factory, error)

Build is used to deserialize the user json schema into a schema factory.

type Field 

type Field struct {
	FieldName       string
	DataType        FieldType
	MaxLength       *int32
	UniqueKeyField  *bool
	PrimaryKeyField *bool
	AutoGenerated   *bool
	// Nested fields are the fields where we know the schema of nested attributes like if properties are
	//defined for the object data type. If no properties are specified, there will be only a top-level field of the
	//data type object.
	Fields []*Field
}

func (*Field) IsAutoGenerated 

func (f *Field) IsAutoGenerated() bool

func (*Field) IsCompatible 

func (f *Field) IsCompatible(f1 *Field) error

func (*Field) IsPrimaryKey 

func (f *Field) IsPrimaryKey() bool

func (*Field) Name 

func (f *Field) Name() string

func (*Field) Type 

func (f *Field) Type() FieldType

type FieldBuilder 

type FieldBuilder struct {
	FieldName   string
	Description string              `json:"description,omitempty"`
	Type        string              `json:"type,omitempty"`
	Format      string              `json:"format,omitempty"`
	Encoding    string              `json:"contentEncoding,omitempty"`
	MaxLength   *int32              `json:"maxLength,omitempty"`
	Auto        *bool               `json:"autoGenerate,omitempty"`
	Items       *FieldBuilder       `json:"items,omitempty"`
	Properties  jsoniter.RawMessage `json:"properties,omitempty"`
	Primary     *bool
	Fields      []*Field
}

func (*FieldBuilder) Build 

func (f *FieldBuilder) Build(isArrayElement bool) (*Field, error)

func (*FieldBuilder) Validate 

func (f *FieldBuilder) Validate(v []byte) error

type FieldSchemaValidator 

type FieldSchemaValidator struct{}

func (*FieldSchemaValidator) Validate 

func (v *FieldSchemaValidator) Validate(existing *DefaultCollection, current *Factory) error

type FieldType 

type FieldType int
const (
	UnknownType FieldType = iota
	NullType
	BoolType
	Int32Type
	Int64Type
	DoubleType
	StringType
	// ByteType is a base64 encoded characters, this means if this type is used as key then we need to decode it
	// and then use it as key.
	ByteType
	UUIDType
	// DateTimeType is a valid date representation as defined by RFC 3339, see https://datatracker.ietf.org/doc/html/rfc3339#section-5.6
	DateTimeType
	ArrayType
	ObjectType
)

func ToFieldType 

func ToFieldType(jsonType string, encoding string, format string) FieldType

type Index 

type Index struct {
	// Fields that are part of this index. An index can have a single or composite fields.
	Fields []*Field
	// Name is used by dictionary encoder for this index.
	Name string
	// Id is assigned to this index by the dictionary encoder.
	Id uint32
}

Index can be composite, so it has a list of fields, each index has name and encoded id. The encoded is used for key building.

func (*Index) IsCompatible 

func (i *Index) IsCompatible(i1 *Index) error

type IndexSchemaValidator 

type IndexSchemaValidator struct{}

func (*IndexSchemaValidator) Validate 

func (v *IndexSchemaValidator) Validate(existing *DefaultCollection, current *Factory) error

type Indexes 

type Indexes struct {
	PrimaryKey *Index
}

Indexes is to wrap different index that a collection can have.

func (*Indexes) GetIndexes 

func (i *Indexes) GetIndexes() []*Index

type JSONSchema 

type JSONSchema struct {
	Name           string              `json:"title,omitempty"`
	Description    string              `json:"description,omitempty"`
	Properties     jsoniter.RawMessage `json:"properties,omitempty"`
	PrimaryKeys    []string            `json:"primary_key,omitempty"`
	CollectionType string              `json:"collection_type,omitempty"`
}

type QueryableField 

type QueryableField struct {
	FieldName     string
	InMemoryAlias string
	Faceted       bool
	Indexed       bool
	Sortable      bool
	DataType      FieldType
	SearchType    string
}

func BuildQueryableFields 

func BuildQueryableFields(fields []*Field) []*QueryableField

func NewQueryableField 

func NewQueryableField(name string, tigrisType FieldType) *QueryableField

func (*QueryableField) InMemoryName 

func (q *QueryableField) InMemoryName() string

InMemoryName returns key name that is used to index this field in the indexing store. For example, an "id" key is indexed with "_tigris_id" name.

func (*QueryableField) IsReserved 

func (q *QueryableField) IsReserved() bool

IsReserved returns true if the queryable field is internal field.

func (*QueryableField) Name 

func (q *QueryableField) Name() string

Name returns the name of this field as defined in the schema.

func (*QueryableField) ShouldPack 

func (q *QueryableField) ShouldPack() bool

ShouldPack returns true if we need to pack this field before sending to indexing store.

type ReservedField 

type ReservedField uint8
const (
	CreatedAt ReservedField = iota
	UpdatedAt
	Metadata
	IdToSearchKey
	DateSearchKeyPrefix
)

type Validator 

type Validator interface {
	Validate(existing *DefaultCollection, current *Factory) error
}

Source Files

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