xorm

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 Go to latest Published: Aug 20, 2015 License: BSD-3-Clause, Apache-2.0 Imports: 24 Imported by: 0

README

中文

Xorm is a simple and powerful ORM for Go.

Build Status Go Walker Bitdeli Badge

Features

  • Struct <-> Table Mapping Support

  • Chainable APIs

  • Transaction Support

  • Both ORM and raw SQL operation Support

  • Sync database schema Support

  • Query Cache speed up

  • Database Reverse support, See Xorm Tool README

  • Simple cascade loading support

  • Optimistic Locking support

Drivers Support

Drivers for Go's sql package which currently support database/sql includes:

Changelog

  • v0.4.1 Features:

    • Add deleted xorm tag for soft delete and add unscoped

  • v0.4.0 RC1 Changes:

    Improvements:

    • Prepared statement cache
    • Add Incr API
    • Specify Timezone Location

More changelogs ...

Installation

If you have gopm installed,

gopm get github.com/go-xorm/xorm

Or

go get github.com/go-xorm/xorm

Documents

Cases

Discuss

Please visit Xorm on Google Groups

Contributing

If you want to pull request, please see CONTRIBUTING

LICENSE

BSD License http://creativecommons.org/licenses/BSD/

Documentation

Overview

Package xorm is a simple and powerful ORM for Go.

Installation

Make sure you have installed Go 1.1+ and then: 

go get github.com/go-xorm/xorm

Create Engine

Firstly, we should new an engine for a database 

engine, err := xorm.NewEngine(driverName, dataSourceName)

Method NewEngine's parameters is the same as sql.Open. It depends drivers' implementation. Generally, one engine for an application is enough. You can set it as package variable.

Raw Methods

Xorm also support raw sql execution:

1. query a SQL string, the returned results is []map[string][]byte 

results, err := engine.Query("select * from user")

2. execute a SQL string, the returned results 

affected, err := engine.Exec("update user set .... where ...")

ORM Methods

There are 7 major ORM methods and many helpful methods to use to operate database.

1. Insert one or multipe records to database 

affected, err := engine.Insert(&struct)
// INSERT INTO struct () values ()
affected, err := engine.Insert(&struct1, &struct2)
// INSERT INTO struct1 () values ()
// INSERT INTO struct2 () values ()
affected, err := engine.Insert(&sliceOfStruct)
// INSERT INTO struct () values (),(),()
affected, err := engine.Insert(&struct1, &sliceOfStruct2)
// INSERT INTO struct1 () values ()
// INSERT INTO struct2 () values (),(),()

2. Query one record from database 

has, err := engine.Get(&user)
// SELECT * FROM user LIMIT 1

3. Query multiple records from database 

sliceOfStructs := new(Struct)
err := engine.Find(sliceOfStructs)
// SELECT * FROM user

4. Query multiple records and record by record handle, there two methods, one is Iterate, another is Rows 

err := engine.Iterate(...)
// SELECT * FROM user

rows, err := engine.Rows(...)
// SELECT * FROM user
defer rows.Close()
bean := new(Struct)
for rows.Next() {
    err = rows.Scan(bean)
}

5. Update one or more records 

affected, err := engine.Id(...).Update(&user)
// UPDATE user SET ...

6. Delete one or more records, Delete MUST has conditon 

affected, err := engine.Where(...).Delete(&user)
// DELETE FROM user Where ...

7. Count records 

counts, err := engine.Count(&user)
// SELECT count(*) AS total FROM user

Conditions

The above 7 methods could use with condition methods chainable. Attention: the above 7 methods should be the last chainable method.

1. Id, In 

engine.Id(1).Get(&user) // for single primary key
// SELECT * FROM user WHERE id = 1
engine.Id(core.PK{1, 2}).Get(&user) // for composite primary keys
// SELECT * FROM user WHERE id1 = 1 AND id2 = 2
engine.In("id", 1, 2, 3).Find(&users)
// SELECT * FROM user WHERE id IN (1, 2, 3)
engine.In("id", []int{1, 2, 3})
// SELECT * FROM user WHERE id IN (1, 2, 3)

2. Where, And, Or 

engine.Where().And().Or().Find()
// SELECT * FROM user WHERE (.. AND ..) OR ...

3. OrderBy, Asc, Desc 

engine.Asc().Desc().Find()
// SELECT * FROM user ORDER BY .. ASC, .. DESC
engine.OrderBy().Find()
// SELECT * FROM user ORDER BY ..

4. Limit, Top 

engine.Limit().Find()
// SELECT * FROM user LIMIT .. OFFSET ..
engine.Top(5).Find()
// SELECT TOP 5 * FROM user // for mssql
// SELECT * FROM user LIMIT .. OFFSET 0 //for other databases

5. Sql, let you custom SQL 

engine.Sql("select * from user").Find()

6. Cols, Omit, Distinct 

engine.Cols("col1, col2").Find()
// SELECT col1, col2 FROM user
engine.Cols("col1", "col2").Where().Update(user)
// UPDATE user set col1 = ?, col2 = ? Where ...
engine.Omit("col1").Find()
// SELECT col2, col3 FROM user
engine.Omit("col1").Insert()
// INSERT INTO table (non-col1) VALUES ()
engine.Distinct("col1").Find()
// SELECT DISTINCT col1 FROM user

7. Join, GroupBy, Having 

engine.GroupBy("name").Having("name='xlw'").Find()
//SELECT * FROM user GROUP BY name HAVING name='xlw'
engine.Join("LEFT", "userdetail", "user.id=userdetail.id").Find()
//SELECT * FROM user LEFT JOIN userdetail ON user.id=userdetail.id

More usage, please visit http://xorm.io/docs

LRUCacher implements Cacher according to LRU algorithm

MemoryStore implements CacheStore provide local machine

Index

Constants

View Source 
const (
	DEFAULT_LOG_PREFIX = "[xorm]"
	DEFAULT_LOG_FLAG   = log.Ldate | log.Lmicroseconds
	DEFAULT_LOG_LEVEL  = core.LOG_DEBUG
)
View Source 
const (
	Version string = "0.4.2.0225"
)

Variables

View Source 
var (
	ErrParamsType      error = errors.New("Params type error")
	ErrTableNotFound   error = errors.New("Not found table")
	ErrUnSupportedType error = errors.New("Unsupported type error")
	ErrNotExist        error = errors.New("Not exist error")
	ErrCacheFailed     error = errors.New("Cache failed")
	ErrNeedDeletedCond error = errors.New("Delete need at least one condition")
	ErrNotImplemented  error = errors.New("Not implemented.")
)
View Source 
var (
	NULL_TIME time.Time
)

Functions

func Atot 

func Atot(s string, tp reflect.Type) (interface{}, error)

Types

type AfterDeleteProcessor 

type AfterDeleteProcessor interface {
	AfterDelete()
}

Executed after an object has been deleted

type AfterInsertProcessor 

type AfterInsertProcessor interface {
	AfterInsert()
}

Executed after an object is persisted to the database

type AfterUpdateProcessor 

type AfterUpdateProcessor interface {
	AfterUpdate()
}

Executed after an object has been updated

type BeforeDeleteProcessor 

type BeforeDeleteProcessor interface {
	BeforeDelete()
}

Executed before an object is deleted

type BeforeInsertProcessor 

type BeforeInsertProcessor interface {
	BeforeInsert()
}

Executed before an object is initially persisted to the database

type BeforeSetProcessor 

type BeforeSetProcessor interface {
	BeforeSet(string, Cell)
}

type BeforeUpdateProcessor 

type BeforeUpdateProcessor interface {
	BeforeUpdate()
}

Executed before an object is updated

type Cell 

type Cell *interface{}

type Engine 

type Engine struct {
	ColumnMapper  core.IMapper
	TableMapper   core.IMapper
	TagIdentifier string
	Tables        map[reflect.Type]*core.Table

	Cacher core.Cacher

	ShowSQL bool

	// !nashtsai! TODO ought to deprecate these but having logger to control its log level
	ShowInfo  bool
	ShowErr   bool
	ShowDebug bool
	ShowWarn  bool

	Logger     core.ILogger
	TZLocation *time.Location
	// contains filtered or unexported fields
}

Engine is the major struct of xorm, it means a database manager. Commonly, an application only need one engine

func NewEngine 

func NewEngine(driverName string, dataSourceName string) (*Engine, error)

new a db manager according to the parameter. Currently support four drivers

func (*Engine) After 

func (engine *Engine) After(closures func(interface{})) *Session

Apply after insert Processor, affected bean is passed to closure arg

func (*Engine) Alias 

func (engine *Engine) Alias(alias string) *Session

set the table alias

func (*Engine) AllCols 

func (engine *Engine) AllCols() *Session

func (*Engine) Asc 

func (engine *Engine) Asc(colNames ...string) *Session

Method Asc will generate "ORDER BY column1,column2 Asc" This method can chainable use. 

engine.Desc("name").Asc("age").Find(&users)
// SELECT * FROM user ORDER BY name DESC, age ASC

func (*Engine) AutoIncrStr 

func (engine *Engine) AutoIncrStr() string

Database's autoincrement statement

func (*Engine) Before 

func (engine *Engine) Before(closures func(interface{})) *Session

Apply before Processor, affected bean is passed to closure arg

func (*Engine) Cascade 

func (engine *Engine) Cascade(trueOrFalse ...bool) *Session

use cascade or not

func (*Engine) Charset 

func (engine *Engine) Charset(charset string) *Session

set charset when create table, only support mysql now

func (*Engine) ClearCache 

func (engine *Engine) ClearCache(beans ...interface{}) error

If enabled cache, clear some tables' cache

func (*Engine) ClearCacheBean 

func (engine *Engine) ClearCacheBean(bean interface{}, id string) error

If enabled cache, clear the cache bean

func (*Engine) Clone 

func (engine *Engine) Clone() (*Engine, error)

clone an engine

func (*Engine) Close 

func (engine *Engine) Close() error

Close the engine

func (*Engine) Cols 

func (engine *Engine) Cols(columns ...string) *Session

only use the paramters as select or update columns

func (*Engine) Count 

func (engine *Engine) Count(bean interface{}) (int64, error)

Count counts the records. bean's non-empty fields are conditions.

func (*Engine) CreateIndexes 

func (engine *Engine) CreateIndexes(bean interface{}) error

create indexes

func (*Engine) CreateTables 

func (engine *Engine) CreateTables(beans ...interface{}) error

CreateTables create tabls according bean

func (*Engine) CreateUniques 

func (engine *Engine) CreateUniques(bean interface{}) error

create uniques

func (*Engine) DB 

func (engine *Engine) DB() *core.DB

func (*Engine) DBMetas 

func (engine *Engine) DBMetas() ([]*core.Table, error)

Retrieve all tables, columns, indexes' informations from database.

func (*Engine) DataSourceName 

func (engine *Engine) DataSourceName() string

func (*Engine) Decr 

func (engine *Engine) Decr(column string, arg ...interface{}) *Session

Method Decr provides a update string like "column = column - ?"

func (*Engine) Delete 

func (engine *Engine) Delete(bean interface{}) (int64, error)

Delete records, bean's non-empty fields are conditions

func (*Engine) Desc 

func (engine *Engine) Desc(colNames ...string) *Session

Method Desc will generate "ORDER BY column1 DESC, column2 DESC" This will

func (*Engine) Dialect 

func (engine *Engine) Dialect() core.Dialect

func (*Engine) Distinct 

func (engine *Engine) Distinct(columns ...string) *Session

use for distinct columns. Caution: when you are using cache, distinct will not be cached because cache system need id, but distinct will not provide id

func (*Engine) DriverName 

func (engine *Engine) DriverName() string

func (*Engine) DropTables 

func (engine *Engine) DropTables(beans ...interface{}) error

func (*Engine) DumpAll 

func (engine *Engine) DumpAll(w io.Writer) error

dump database all table structs and data to w

func (*Engine) DumpAllToFile 

func (engine *Engine) DumpAllToFile(fp string) error

dump database all table structs and data to a file

func (*Engine) Exec 

func (engine *Engine) Exec(sql string, args ...interface{}) (sql.Result, error)

Exec raw sql

func (*Engine) Find 

func (engine *Engine) Find(beans interface{}, condiBeans ...interface{}) error

Find retrieve records from table, condiBeans's non-empty fields are conditions. beans could be []Struct, []*Struct, map[int64]Struct map[int64]*Struct

func (*Engine) FormatTime 

func (engine *Engine) FormatTime(sqlTypeName string, t time.Time) (v interface{})

func (*Engine) Get 

func (engine *Engine) Get(bean interface{}) (bool, error)

Get retrieve one record from table, bean's non-empty fields are conditions

func (*Engine) GobRegister 

func (engine *Engine) GobRegister(v interface{}) *Engine

func (*Engine) GroupBy 

func (engine *Engine) GroupBy(keys string) *Session

Generate Group By statement

func (*Engine) Having 

func (engine *Engine) Having(conditions string) *Session

Generate Having statement

func (*Engine) Id 

func (engine *Engine) Id(id interface{}) *Session

Id mehtod provoide a condition as (id) = ?

func (*Engine) IdOf 

func (engine *Engine) IdOf(bean interface{}) core.PK

func (*Engine) IdOfV 

func (engine *Engine) IdOfV(rv reflect.Value) core.PK

func (*Engine) Import 

func (engine *Engine) Import(r io.Reader) ([]sql.Result, error)

Import SQL DDL file

func (*Engine) ImportFile 

func (engine *Engine) ImportFile(ddlPath string) ([]sql.Result, error)

Import SQL DDL file

func (*Engine) In 

func (engine *Engine) In(column string, args ...interface{}) *Session

This method will generate "column IN (?, ?)"

func (*Engine) Incr 

func (engine *Engine) Incr(column string, arg ...interface{}) *Session

Method Inc provides a update string like "column = column + ?"

func (*Engine) Insert 

func (engine *Engine) Insert(beans ...interface{}) (int64, error)

Insert one or more records

func (*Engine) InsertOne 

func (engine *Engine) InsertOne(bean interface{}) (int64, error)

Insert only one record

func (*Engine) IsTableEmpty 

func (engine *Engine) IsTableEmpty(bean interface{}) (bool, error)

If a table has any reocrd

func (*Engine) IsTableExist 

func (engine *Engine) IsTableExist(beanOrTableName interface{}) (bool, error)

If a table is exist

func (*Engine) Iterate 

func (engine *Engine) Iterate(bean interface{}, fun IterFunc) error

Iterate record by record handle records from table, bean's non-empty fields are conditions.

func (*Engine) Join 

func (engine *Engine) Join(join_operator string, tablename interface{}, condition string) *Session

The join_operator should be one of INNER, LEFT OUTER, CROSS etc - this will be prepended to JOIN

func (*Engine) Limit 

func (engine *Engine) Limit(limit int, start ...int) *Session

This method will generate "LIMIT start, limit"

func (*Engine) LogDebug 

func (engine *Engine) LogDebug(contents ...interface{})

logging debug

func (*Engine) LogDebugf 

func (engine *Engine) LogDebugf(format string, contents ...interface{})

func (*Engine) LogError 

func (engine *Engine) LogError(contents ...interface{})

func (*Engine) LogErrorf 

func (engine *Engine) LogErrorf(format string, contents ...interface{})

func (*Engine) LogInfo 

func (engine *Engine) LogInfo(contents ...interface{})

logging info

func (*Engine) LogInfof 

func (engine *Engine) LogInfof(format string, contents ...interface{})

func (*Engine) LogSQLExecutionTime 

func (engine *Engine) LogSQLExecutionTime(sqlStr string, args interface{}, executionBlock func() (sql.Result, error)) (sql.Result, error)

func (*Engine) LogSQLQueryTime 

func (engine *Engine) LogSQLQueryTime(sqlStr string, args interface{}, executionBlock func() (*core.Stmt, *core.Rows, error)) (*core.Stmt, *core.Rows, error)

func (*Engine) LogWarn 

func (engine *Engine) LogWarn(contents ...interface{})

logging warn

func (*Engine) LogWarnf 

func (engine *Engine) LogWarnf(format string, contents ...interface{})

func (*Engine) MapCacher 

func (engine *Engine) MapCacher(bean interface{}, cacher core.Cacher)

Set a table use a special cacher

func (*Engine) MustCols 

func (engine *Engine) MustCols(columns ...string) *Session

func (*Engine) NewDB 

func (engine *Engine) NewDB() (*core.DB, error)

NewDB provides an interface to operate database directly

func (*Engine) NewSession 

func (engine *Engine) NewSession() *Session

New a session

func (*Engine) NoAutoTime 

func (engine *Engine) NoAutoTime() *Session

Default if your struct has "created" or "updated" filed tag, the fields will automatically be filled with current time when Insert or Update invoked. Call NoAutoTime if you dont' want to fill automatically.

func (*Engine) NoCache 

func (engine *Engine) NoCache() *Session

If you has set default cacher, and you want temporilly stop use cache, you can use NoCache()

func (*Engine) NoCascade 

func (engine *Engine) NoCascade() *Session

func (*Engine) NowTime 

func (engine *Engine) NowTime(sqlTypeName string) interface{}

func (*Engine) NowTime2 

func (engine *Engine) NowTime2(sqlTypeName string) (interface{}, time.Time)

func (*Engine) Omit 

func (engine *Engine) Omit(columns ...string) *Session

Only not use the paramters as select or update columns

func (*Engine) OrderBy 

func (engine *Engine) OrderBy(order string) *Session

Method OrderBy will generate "ORDER BY order"

func (*Engine) Ping 

func (engine *Engine) Ping() error

Ping tests if database is alive

func (*Engine) Query 

func (engine *Engine) Query(sql string, paramStr ...interface{}) (resultsSlice []map[string][]byte, err error)

Exec a raw sql and return records as []map[string][]byte

func (*Engine) Quote 

func (engine *Engine) Quote(sql string) string

Use QuoteStr quote the string sql

func (*Engine) QuoteStr 

func (engine *Engine) QuoteStr() string

Engine's database use which charactor as quote. mysql, sqlite use ` and postgres use "

func (*Engine) Rows 

func (engine *Engine) Rows(bean interface{}) (*Rows, error)

Return sql.Rows compatible Rows obj, as a forward Iterator object for iterating record by record, bean's non-empty fields are conditions.

func (*Engine) SetColumnMapper 

func (engine *Engine) SetColumnMapper(mapper core.IMapper)

func (*Engine) SetDefaultCacher 

func (engine *Engine) SetDefaultCacher(cacher core.Cacher)

SetDefaltCacher set the default cacher. Xorm's default not enable cacher.

func (*Engine) SetDisableGlobalCache 

func (engine *Engine) SetDisableGlobalCache(disable bool)

func (*Engine) SetExpr 

func (engine *Engine) SetExpr(column string, expression string) *Session

Method SetExpr provides a update string like "column = {expression}"

func (*Engine) SetLogger 

func (engine *Engine) SetLogger(logger core.ILogger)

func (*Engine) SetMapper 

func (engine *Engine) SetMapper(mapper core.IMapper)

func (*Engine) SetMaxConns 

func (engine *Engine) SetMaxConns(conns int)

@Deprecated

func (*Engine) SetMaxIdleConns 

func (engine *Engine) SetMaxIdleConns(conns int)

SetMaxIdleConns

func (*Engine) SetMaxOpenConns 

func (engine *Engine) SetMaxOpenConns(conns int)

SetMaxOpenConns is only available for go 1.2+

func (*Engine) SetTableMapper 

func (engine *Engine) SetTableMapper(mapper core.IMapper)

func (*Engine) Sql 

func (engine *Engine) Sql(querystring string, args ...interface{}) *Session

Sql method let's you manualy write raw sql and operate For example: 

engine.Sql("select * from user").Find(&users)

This code will execute "select * from user" and set the records to users

func (*Engine) SqlType 

func (engine *Engine) SqlType(c *core.Column) string

A simple wrapper to dialect's core.SqlType method

func (*Engine) StoreEngine 

func (engine *Engine) StoreEngine(storeEngine string) *Session

set store engine when create table, only support mysql now

func (*Engine) SupportInsertMany 

func (engine *Engine) SupportInsertMany() bool

If engine's database support batch insert records like "insert into user values (name, age), (name, age)". When the return is ture, then engine.Insert(&users) will generate batch sql and exeute.

func (*Engine) Sync 

func (engine *Engine) Sync(beans ...interface{}) error

Sync the new struct changes to database, this method will automatically add table, column, index, unique. but will not delete or change anything. If you change some field, you should change the database manually.

func (*Engine) Sync2 

func (engine *Engine) Sync2(beans ...interface{}) error

func (*Engine) TZTime 

func (engine *Engine) TZTime(t time.Time) time.Time

func (*Engine) Table 

func (engine *Engine) Table(tableNameOrBean interface{}) *Session

Temporarily change the Get, Find, Update's table

func (*Engine) TableInfo 

func (engine *Engine) TableInfo(bean interface{}) *core.Table

func (*Engine) Unscoped 

func (engine *Engine) Unscoped() *Session

Always disable struct tag "deleted"

func (*Engine) Update 

func (engine *Engine) Update(bean interface{}, condiBeans ...interface{}) (int64, error)

Update records, bean's non-empty fields are updated contents, condiBean' non-empty filds are conditions CAUTION: 

1.bool will defaultly be updated content nor conditions
 You should call UseBool if you have bool to use.
2.float32 & float64 may be not inexact as conditions

func (*Engine) UseBool 

func (engine *Engine) UseBool(columns ...string) *Session

Xorm automatically retrieve condition according struct, but if struct has bool field, it will ignore them. So use UseBool to tell system to do not ignore them. If no paramters, it will use all the bool field of struct, or it will use paramters's columns

func (*Engine) Where 

func (engine *Engine) Where(querystring string, args ...interface{}) *Session

Where method provide a condition query

type IterFunc 

type IterFunc func(idx int, bean interface{}) error

IterFunc only use by Iterate

type LRUCacher 

type LRUCacher struct {

	// maxSize    int
	MaxElementSize int
	Expired        time.Duration
	GcInterval     time.Duration
	// contains filtered or unexported fields
}

func NewLRUCacher 

func NewLRUCacher(store core.CacheStore, maxElementSize int) *LRUCacher

func NewLRUCacher2 

func NewLRUCacher2(store core.CacheStore, expired time.Duration, maxElementSize int) *LRUCacher

func (*LRUCacher) ClearBeans 

func (m *LRUCacher) ClearBeans(tableName string)

func (*LRUCacher) ClearIds 

func (m *LRUCacher) ClearIds(tableName string)

func (*LRUCacher) DelBean 

func (m *LRUCacher) DelBean(tableName string, id string)

func (*LRUCacher) DelIds 

func (m *LRUCacher) DelIds(tableName, sql string)

func (*LRUCacher) GC 

func (m *LRUCacher) GC()

GC check ids lit and sql list to remove all element expired

func (*LRUCacher) GetBean 

func (m *LRUCacher) GetBean(tableName string, id string) interface{}

Get bean according tableName and id from cache

func (*LRUCacher) GetIds 

func (m *LRUCacher) GetIds(tableName, sql string) interface{}

Get all bean's ids according to sql and parameter from cache

func (*LRUCacher) PutBean 

func (m *LRUCacher) PutBean(tableName string, id string, obj interface{})

func (*LRUCacher) PutIds 

func (m *LRUCacher) PutIds(tableName, sql string, ids interface{})

func (*LRUCacher) RunGC 

func (m *LRUCacher) RunGC()

RunGC run once every m.GcInterval

type MemoryStore 

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

memory store

func NewMemoryStore 

func NewMemoryStore() *MemoryStore

func (*MemoryStore) Del 

func (s *MemoryStore) Del(key string) error

func (*MemoryStore) Get 

func (s *MemoryStore) Get(key string) (interface{}, error)

func (*MemoryStore) Put 

func (s *MemoryStore) Put(key string, value interface{}) error

type Rows 

type Rows struct {
	NoTypeCheck bool
	// contains filtered or unexported fields
}

func (*Rows) Close 

func (rows *Rows) Close() error

close session if session.IsAutoClose is true, and claimed any opened resources

func (*Rows) Err 

func (rows *Rows) Err() error

Err returns the error, if any, that was encountered during iteration. Err may be called after an explicit or implicit Close.

func (*Rows) Next 

func (rows *Rows) Next() bool

move cursor to next record, return false if end has reached

func (*Rows) Scan 

func (rows *Rows) Scan(bean interface{}) error

scan row record to bean properties

type Session 

type Session struct {
	Engine                 *Engine
	Tx                     *core.Tx
	Statement              Statement
	IsAutoCommit           bool
	IsCommitedOrRollbacked bool
	TransType              string
	IsAutoClose            bool

	// Automatically reset the statement after operations that execute a SQL
	// query such as Count(), Find(), Get(), ...
	AutoResetStatement bool
	// contains filtered or unexported fields
}

Struct Session keep a pointer to sql.DB and provides all execution of all kind of database operations.

func (*Session) After 

func (session *Session) After(closures func(interface{})) *Session

Apply after Processor, affected bean is passed to closure arg

func (*Session) Alias 

func (session *Session) Alias(alias string) *Session

set the table alias

func (*Session) AllCols 

func (session *Session) AllCols() *Session

func (*Session) And 

func (session *Session) And(querystring string, args ...interface{}) *Session

Method Where provides custom query condition.

func (*Session) Asc 

func (session *Session) Asc(colNames ...string) *Session

Method Asc provide asc order by query condition, the input parameters are columns.

func (*Session) Before 

func (session *Session) Before(closures func(interface{})) *Session

Apply before Processor, affected bean is passed to closure arg

func (*Session) Begin 

func (session *Session) Begin() error

Begin a transaction

func (*Session) Cascade 

func (session *Session) Cascade(trueOrFalse ...bool) *Session

Method Cascade indicates if loading sub Struct

func (*Session) Charset 

func (session *Session) Charset(charset string) *Session

Method Charset is only avialble mysql dialect currently

func (*Session) Close 

func (session *Session) Close()

Method Close release the connection from pool

func (*Session) Cols 

func (session *Session) Cols(columns ...string) *Session

Method Cols provides some columns to special

func (*Session) Commit 

func (session *Session) Commit() error

When using transaction, Commit will commit all operations.

func (*Session) Count 

func (session *Session) Count(bean interface{}) (int64, error)

Count counts the records. bean's non-empty fields are conditions.

func (*Session) CreateIndexes 

func (session *Session) CreateIndexes(bean interface{}) error

create indexes

func (*Session) CreateTable 

func (session *Session) CreateTable(bean interface{}) error

this function create a table according a bean

func (*Session) CreateUniques 

func (session *Session) CreateUniques(bean interface{}) error

create uniques

func (*Session) DB 

func (session *Session) DB() *core.DB

func (*Session) Decr 

func (session *Session) Decr(column string, arg ...interface{}) *Session

Method Decr provides a query string like "count = count - 1"

func (*Session) Delete 

func (session *Session) Delete(bean interface{}) (int64, error)

Delete records, bean's non-empty fields are conditions

func (*Session) Desc 

func (session *Session) Desc(colNames ...string) *Session

Method Desc provide desc order by query condition, the input parameters are columns.

func (*Session) Distinct 

func (session *Session) Distinct(columns ...string) *Session

use for distinct columns. Caution: when you are using cache, distinct will not be cached because cache system need id, but distinct will not provide id

func (*Session) DropIndexes 

func (session *Session) DropIndexes(bean interface{}) error

drop indexes

func (*Session) DropTable 

func (session *Session) DropTable(beanOrTableName interface{}) error

drop table will drop table if exist, if drop failed, it will return error

func (*Session) Exec 

func (session *Session) Exec(sqlStr string, args ...interface{}) (sql.Result, error)

Exec raw sql

func (*Session) Find 

func (session *Session) Find(rowsSlicePtr interface{}, condiBean ...interface{}) error

Find retrieve records from table, condiBeans's non-empty fields are conditions. beans could be []Struct, []*Struct, map[int64]Struct map[int64]*Struct

func (*Session) Get 

func (session *Session) Get(bean interface{}) (bool, error)

get retrieve one record from database, bean's non-empty fields will be as conditions

func (*Session) GroupBy 

func (session *Session) GroupBy(keys string) *Session

Generate Group By statement

func (*Session) Having 

func (session *Session) Having(conditions string) *Session

Generate Having statement

func (*Session) Id 

func (session *Session) Id(id interface{}) *Session

Method Id provides converting id as a query condition

func (*Session) In 

func (session *Session) In(column string, args ...interface{}) *Session

Method In provides a query string like "id in (1, 2, 3)"

func (*Session) Incr 

func (session *Session) Incr(column string, arg ...interface{}) *Session

Method In provides a query string like "count = count + 1"

func (*Session) Init 

func (session *Session) Init()

Method Init reset the session as the init status.

func (*Session) Insert 

func (session *Session) Insert(beans ...interface{}) (int64, error)

insert one or more beans

func (*Session) InsertMulti 

func (session *Session) InsertMulti(rowsSlicePtr interface{}) (int64, error)

Insert multiple records

func (*Session) InsertOne 

func (session *Session) InsertOne(bean interface{}) (int64, error)

Method InsertOne insert only one struct into database as a record. The in parameter bean must a struct or a point to struct. The return parameter is inserted and error

func (*Session) IsTableEmpty 

func (session *Session) IsTableEmpty(bean interface{}) (bool, error)

func (*Session) IsTableExist 

func (session *Session) IsTableExist(beanOrTableName interface{}) (bool, error)

func (*Session) Iterate 

func (session *Session) Iterate(bean interface{}, fun IterFunc) error

Iterate record by record handle records from table, condiBeans's non-empty fields are conditions. beans could be []Struct, []*Struct, map[int64]Struct map[int64]*Struct

func (*Session) Join 

func (session *Session) Join(join_operator string, tablename interface{}, condition string) *Session

The join_operator should be one of INNER, LEFT OUTER, CROSS etc - this will be prepended to JOIN

func (*Session) Limit 

func (session *Session) Limit(limit int, start ...int) *Session

Method Limit provide limit and offset query condition

func (*Session) MustCols 

func (session *Session) MustCols(columns ...string) *Session

func (*Session) NoAutoTime 

func (session *Session) NoAutoTime() *Session

Method NoAutoTime means do not automatically give created field and updated field the current time on the current session temporarily

func (*Session) NoCache 

func (session *Session) NoCache() *Session

Method NoCache ask this session do not retrieve data from cache system and get data from database directly.

func (*Session) NoCascade 

func (session *Session) NoCascade() *Session

func (*Session) Omit 

func (session *Session) Omit(columns ...string) *Session

Only not use the paramters as select or update columns

func (*Session) Or 

func (session *Session) Or(querystring string, args ...interface{}) *Session

Method Where provides custom query condition.

func (*Session) OrderBy 

func (session *Session) OrderBy(order string) *Session

Method OrderBy provide order by query condition, the input parameter is the content after order by on a sql statement.

func (*Session) Ping 

func (session *Session) Ping() error

Test if database is ok

func (*Session) Query 

func (session *Session) Query(sqlStr string, paramStr ...interface{}) (resultsSlice []map[string][]byte, err error)

Exec a raw sql and return records as []map[string][]byte

func (*Session) Rollback 

func (session *Session) Rollback() error

When using transaction, you can rollback if any error

func (*Session) Rows 

func (session *Session) Rows(bean interface{}) (*Rows, error)

Return sql.Rows compatible Rows obj, as a forward Iterator object for iterating record by record, bean's non-empty fields are conditions.

func (*Session) SetExpr 

func (session *Session) SetExpr(column string, expression string) *Session

Method SetExpr provides a query string like "column = {expression}"

func (*Session) Sql 

func (session *Session) Sql(querystring string, args ...interface{}) *Session

Method Sql provides raw sql input parameter. When you have a complex SQL statement and cannot use Where, Id, In and etc. Methods to describe, you can use Sql.

func (*Session) StoreEngine 

func (session *Session) StoreEngine(storeEngine string) *Session

Method StoreEngine is only avialble mysql dialect currently

func (*Session) Sync2 

func (s *Session) Sync2(beans ...interface{}) error

func (*Session) Table 

func (session *Session) Table(tableNameOrBean interface{}) *Session

Method core.Table can input a string or pointer to struct for special a table to operate.

func (*Session) Unscoped 

func (session *Session) Unscoped() *Session

Always disable struct tag "deleted"

func (*Session) Update 

func (session *Session) Update(bean interface{}, condiBean ...interface{}) (int64, error)

Update records, bean's non-empty fields are updated contents, condiBean' non-empty filds are conditions CAUTION: 

1.bool will defaultly be updated content nor conditions
 You should call UseBool if you have bool to use.
2.float32 & float64 may be not inexact as conditions

func (*Session) UseBool 

func (session *Session) UseBool(columns ...string) *Session

Xorm automatically retrieve condition according struct, but if struct has bool field, it will ignore them. So use UseBool to tell system to do not ignore them. If no paramters, it will use all the bool field of struct, or it will use paramters's columns

func (*Session) Where 

func (session *Session) Where(querystring string, args ...interface{}) *Session

Method Where provides custom query condition.

type SimpleLogger 

type SimpleLogger struct {
	DEBUG *log.Logger
	ERR   *log.Logger
	INFO  *log.Logger
	WARN  *log.Logger
	// contains filtered or unexported fields
}

func NewSimpleLogger 

func NewSimpleLogger(out io.Writer) *SimpleLogger

func NewSimpleLogger2 

func NewSimpleLogger2(out io.Writer, prefix string, flag int) *SimpleLogger

func NewSimpleLogger3 

func NewSimpleLogger3(out io.Writer, prefix string, flag int, l core.LogLevel) *SimpleLogger

func (*SimpleLogger) Debug 

func (s *SimpleLogger) Debug(v ...interface{}) (err error)

func (*SimpleLogger) Debugf 

func (s *SimpleLogger) Debugf(format string, v ...interface{}) (err error)

func (*SimpleLogger) Err 

func (s *SimpleLogger) Err(v ...interface{}) (err error)

func (*SimpleLogger) Errf 

func (s *SimpleLogger) Errf(format string, v ...interface{}) (err error)

func (*SimpleLogger) Info 

func (s *SimpleLogger) Info(v ...interface{}) (err error)

func (*SimpleLogger) Infof 

func (s *SimpleLogger) Infof(format string, v ...interface{}) (err error)

func (*SimpleLogger) Level 

func (s *SimpleLogger) Level() core.LogLevel

func (*SimpleLogger) SetLevel 

func (s *SimpleLogger) SetLevel(l core.LogLevel) (err error)

func (*SimpleLogger) Warning 

func (s *SimpleLogger) Warning(v ...interface{}) (err error)

func (*SimpleLogger) Warningf 

func (s *SimpleLogger) Warningf(format string, v ...interface{}) (err error)

type Statement 

type Statement struct {
	RefTable   *core.Table
	Engine     *Engine
	Start      int
	LimitN     int
	WhereStr   string
	IdParam    *core.PK
	Params     []interface{}
	OrderStr   string
	JoinStr    string
	GroupByStr string
	HavingStr  string
	ColumnStr  string

	OmitStr      string
	ConditionStr string
	AltTableName string
	RawSQL       string
	RawParams    []interface{}
	UseCascade   bool
	UseAutoJoin  bool
	StoreEngine  string
	Charset      string
	BeanArgs     []interface{}
	UseCache     bool
	UseAutoTime  bool
	IsDistinct   bool
	TableAlias   string
	// contains filtered or unexported fields
}

statement save all the sql info for executing SQL

func (*Statement) Alias 

func (statement *Statement) Alias(alias string) *Statement

set the table alias

func (*Statement) AllCols 

func (statement *Statement) AllCols() *Statement

Update use only: update all columns

func (*Statement) And 

func (statement *Statement) And(querystring string, args ...interface{}) *Statement

add Where & and statment

func (*Statement) Asc 

func (statement *Statement) Asc(colNames ...string) *Statement

Method Asc provide asc order by query condition, the input parameters are columns.

func (*Statement) Cols 

func (statement *Statement) Cols(columns ...string) *Statement

Generate "col1, col2" statement

func (*Statement) Decr 

func (statement *Statement) Decr(column string, arg ...interface{}) *Statement

Generate "Update ... Set column = column - arg" statment

func (*Statement) Desc 

func (statement *Statement) Desc(colNames ...string) *Statement

func (*Statement) Distinct 

func (statement *Statement) Distinct(columns ...string) *Statement

Generate "Distince col1, col2 " statment

func (*Statement) GroupBy 

func (statement *Statement) GroupBy(keys string) *Statement

Generate "Group By keys" statement

func (*Statement) Having 

func (statement *Statement) Having(conditions string) *Statement

Generate "Having conditions" statement

func (*Statement) Id 

func (statement *Statement) Id(id interface{}) *Statement

Generate "where id = ? " statment or for composite key "where key1 = ? and key2 = ?"

func (*Statement) In 

func (statement *Statement) In(column string, args ...interface{}) *Statement

Generate "Where column IN (?) " statment

func (*Statement) Incr 

func (statement *Statement) Incr(column string, arg ...interface{}) *Statement

Generate "Update ... Set column = column + arg" statment

func (*Statement) Init 

func (statement *Statement) Init()

init

func (*Statement) Join 

func (statement *Statement) Join(join_operator string, tablename interface{}, condition string) *Statement

The join_operator should be one of INNER, LEFT OUTER, CROSS etc - this will be prepended to JOIN

func (*Statement) JoinColumns 

func (statement *Statement) JoinColumns(cols []*core.Column) string

func (*Statement) Limit 

func (statement *Statement) Limit(limit int, start ...int) *Statement

Generate LIMIT start, limit statement

func (*Statement) MustCols 

func (statement *Statement) MustCols(columns ...string) *Statement

Update use only: must update columns

func (*Statement) Omit 

func (statement *Statement) Omit(columns ...string)

do not use the columns

func (*Statement) Or 

func (statement *Statement) Or(querystring string, args ...interface{}) *Statement

add Where & Or statment

func (*Statement) OrderBy 

func (statement *Statement) OrderBy(order string) *Statement

Generate "Order By order" statement

func (*Statement) SetExpr 

func (statement *Statement) SetExpr(column string, expression string) *Statement

Generate "Update ... Set column = {expression}" statment

func (*Statement) Sql 

func (statement *Statement) Sql(querystring string, args ...interface{}) *Statement

add the raw sql statement

func (*Statement) Table 

func (statement *Statement) Table(tableNameOrBean interface{}) *Statement

tempororily set table name

func (*Statement) TableName 

func (statement *Statement) TableName() string

return current tableName

func (*Statement) Top 

func (statement *Statement) Top(limit int) *Statement

Generate LIMIT limit statement

func (*Statement) Unscoped 

func (statement *Statement) Unscoped() *Statement

Always disable struct tag "deleted"

func (*Statement) UseBool 

func (statement *Statement) UseBool(columns ...string) *Statement

indicates that use bool fields as update contents and query contiditions

func (*Statement) Where 

func (statement *Statement) Where(querystring string, args ...interface{}) *Statement

add Where statment

type SyslogLogger 

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

func NewSyslogLogger 

func NewSyslogLogger(w *syslog.Writer) *SyslogLogger

func (*SyslogLogger) Debug 

func (s *SyslogLogger) Debug(v ...interface{}) (err error)

func (*SyslogLogger) Debugf 

func (s *SyslogLogger) Debugf(format string, v ...interface{}) (err error)

func (*SyslogLogger) Err 

func (s *SyslogLogger) Err(v ...interface{}) (err error)

func (*SyslogLogger) Errf 

func (s *SyslogLogger) Errf(format string, v ...interface{}) (err error)

func (*SyslogLogger) Info 

func (s *SyslogLogger) Info(v ...interface{}) (err error)

func (*SyslogLogger) Infof 

func (s *SyslogLogger) Infof(format string, v ...interface{}) (err error)

func (*SyslogLogger) Level 

func (s *SyslogLogger) Level() core.LogLevel

func (*SyslogLogger) SetLevel 

func (s *SyslogLogger) SetLevel(l core.LogLevel) (err error)

SetLevel always return error, as current log/syslog package doesn't allow to set priority level after syslog.Writer created

func (*SyslogLogger) Warning 

func (s *SyslogLogger) Warning(v ...interface{}) (err error)

func (*SyslogLogger) Warningf 

func (s *SyslogLogger) Warningf(format string, v ...interface{}) (err error)

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