update READMEs
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Lunny Xiao
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70
README.md
70
README.md
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@ -148,11 +148,14 @@ affected, err := engine.Exec("update user set age = ? where name = ?", age, name
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```Go
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affected, err := engine.Insert(&user)
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// INSERT INTO struct () values ()
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affected, err := engine.Insert(&user1, &user2)
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// INSERT INTO struct1 () values ()
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// INSERT INTO struct2 () values ()
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affected, err := engine.Insert(&users)
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// INSERT INTO struct () values (),(),()
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affected, err := engine.Insert(&user1, &users)
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// INSERT INTO struct1 () values ()
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// INSERT INTO struct2 () values (),(),()
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@ -163,18 +166,23 @@ affected, err := engine.Insert(&user1, &users)
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```Go
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has, err := engine.Get(&user)
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// SELECT * FROM user LIMIT 1
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has, err := engine.Where("name = ?", name).Desc("id").Get(&user)
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// SELECT * FROM user WHERE name = ? ORDER BY id DESC LIMIT 1
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var name string
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has, err := engine.Where("id = ?", id).Cols("name").Get(&name)
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// SELECT name FROM user WHERE id = ?
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var id int64
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has, err := engine.Where("name = ?", name).Cols("id").Get(&id)
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has, err := engine.SQL("select id from user").Get(&id)
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// SELECT id FROM user WHERE name = ?
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var valuesMap = make(map[string]string)
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has, err := engine.Where("id = ?", id).Get(&valuesMap)
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// SELECT * FROM user WHERE id = ?
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var valuesSlice = make([]interface{}, len(cols))
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has, err := engine.Where("id = ?", id).Cols(cols...).Get(&valuesSlice)
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// SELECT col1, col2, col3 FROM user WHERE id = ?
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@ -185,16 +193,21 @@ has, err := engine.Where("id = ?", id).Cols(cols...).Get(&valuesSlice)
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```Go
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has, err := testEngine.Exist(new(RecordExist))
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// SELECT * FROM record_exist LIMIT 1
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has, err = testEngine.Exist(&RecordExist{
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Name: "test1",
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})
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// SELECT * FROM record_exist WHERE name = ? LIMIT 1
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has, err = testEngine.Where("name = ?", "test1").Exist(&RecordExist{})
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// SELECT * FROM record_exist WHERE name = ? LIMIT 1
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has, err = testEngine.SQL("select * from record_exist where name = ?", "test1").Exist()
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// select * from record_exist where name = ?
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has, err = testEngine.Table("record_exist").Exist()
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// SELECT * FROM record_exist LIMIT 1
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has, err = testEngine.Table("record_exist").Where("name = ?", "test1").Exist()
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// SELECT * FROM record_exist WHERE name = ? LIMIT 1
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```
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@ -279,7 +292,9 @@ affected, err := engine.Id(1).AllCols().Update(&user)
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```Go
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affected, err := engine.Where(...).Delete(&user)
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// DELETE FROM user Where ...
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affected, err := engine.Id(2).Delete(&user)
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affected, err := engine.ID(2).Delete(&user)
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// DELETE FROM user Where id = ?
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```
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* `Count` count records
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@ -312,6 +327,59 @@ err := engine.Where(builder.NotIn("a", 1, 2).And(builder.In("b", "c", "d", "e"))
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// SELECT id, name ... FROM user WHERE a NOT IN (?, ?) AND b IN (?, ?, ?)
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```
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* Multiple operations in one go routine, no transation here but resue session memory
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```Go
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session := engine.NewSession()
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defer session.Close()
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user1 := Userinfo{Username: "xiaoxiao", Departname: "dev", Alias: "lunny", Created: time.Now()}
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if _, err := session.Insert(&user1); err != nil {
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return err
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}
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user2 := Userinfo{Username: "yyy"}
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if _, err := session.Where("id = ?", 2).Update(&user2); err != nil {
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return err
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}
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if _, err := session.Exec("delete from userinfo where username = ?", user2.Username); err != nil {
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return err
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}
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return nil
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```
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* Transation should on one go routine. There is transaction and resue session memory
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```Go
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session := engine.NewSession()
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defer session.Close()
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// add Begin() before any action
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if err := session.Begin(); err != nil {
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// if returned then will rollback automatically
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return err
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}
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user1 := Userinfo{Username: "xiaoxiao", Departname: "dev", Alias: "lunny", Created: time.Now()}
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if _, err := session.Insert(&user1); err != nil {
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return err
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}
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user2 := Userinfo{Username: "yyy"}
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if _, err := session.Where("id = ?", 2).Update(&user2); err != nil {
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return err
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}
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if _, err := session.Exec("delete from userinfo where username = ?", user2.Username); err != nil {
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return err
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}
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// add Commit() after all actions
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return session.Commit()
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```
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# Cases
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* [studygolang](http://studygolang.com/) - [github.com/studygolang/studygolang](https://github.com/studygolang/studygolang)
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69
README_CN.md
69
README_CN.md
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@ -155,11 +155,14 @@ affected, err := engine.Exec("update user set age = ? where name = ?", age, name
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```Go
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affected, err := engine.Insert(&user)
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// INSERT INTO struct () values ()
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affected, err := engine.Insert(&user1, &user2)
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// INSERT INTO struct1 () values ()
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// INSERT INTO struct2 () values ()
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affected, err := engine.Insert(&users)
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// INSERT INTO struct () values (),(),()
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affected, err := engine.Insert(&user1, &users)
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// INSERT INTO struct1 () values ()
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// INSERT INTO struct2 () values (),(),()
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@ -170,18 +173,23 @@ affected, err := engine.Insert(&user1, &users)
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```Go
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has, err := engine.Get(&user)
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// SELECT * FROM user LIMIT 1
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has, err := engine.Where("name = ?", name).Desc("id").Get(&user)
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// SELECT * FROM user WHERE name = ? ORDER BY id DESC LIMIT 1
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var name string
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has, err := engine.Where("id = ?", id).Cols("name").Get(&name)
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// SELECT name FROM user WHERE id = ?
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var id int64
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has, err := engine.Where("name = ?", name).Cols("id").Get(&id)
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has, err := engine.SQL("select id from user").Get(&id)
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// SELECT id FROM user WHERE name = ?
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var valuesMap = make(map[string]string)
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has, err := engine.Where("id = ?", id).Get(&valuesMap)
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// SELECT * FROM user WHERE id = ?
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var valuesSlice = make([]interface{}, len(cols))
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has, err := engine.Where("id = ?", id).Cols(cols...).Get(&valuesSlice)
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// SELECT col1, col2, col3 FROM user WHERE id = ?
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@ -192,16 +200,21 @@ has, err := engine.Where("id = ?", id).Cols(cols...).Get(&valuesSlice)
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```Go
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has, err := testEngine.Exist(new(RecordExist))
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// SELECT * FROM record_exist LIMIT 1
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has, err = testEngine.Exist(&RecordExist{
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Name: "test1",
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})
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// SELECT * FROM record_exist WHERE name = ? LIMIT 1
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has, err = testEngine.Where("name = ?", "test1").Exist(&RecordExist{})
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// SELECT * FROM record_exist WHERE name = ? LIMIT 1
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has, err = testEngine.SQL("select * from record_exist where name = ?", "test1").Exist()
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// select * from record_exist where name = ?
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has, err = testEngine.Table("record_exist").Exist()
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// SELECT * FROM record_exist LIMIT 1
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has, err = testEngine.Table("record_exist").Where("name = ?", "test1").Exist()
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// SELECT * FROM record_exist WHERE name = ? LIMIT 1
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```
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@ -286,6 +299,9 @@ affected, err := engine.Id(1).AllCols().Update(&user)
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```Go
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affected, err := engine.Where(...).Delete(&user)
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// DELETE FROM user Where ...
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affected, err := engine.ID(2).Delete(&user)
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// DELETE FROM user Where id = ?
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```
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* `Count` 获取记录条数
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@ -318,6 +334,59 @@ err := engine.Where(builder.NotIn("a", 1, 2).And(builder.In("b", "c", "d", "e"))
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// SELECT id, name ... FROM user WHERE a NOT IN (?, ?) AND b IN (?, ?, ?)
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```
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* 在一个Go程中多次操作数据库，但没有事务
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```Go
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session := engine.NewSession()
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defer session.Close()
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user1 := Userinfo{Username: "xiaoxiao", Departname: "dev", Alias: "lunny", Created: time.Now()}
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if _, err := session.Insert(&user1); err != nil {
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return err
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}
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user2 := Userinfo{Username: "yyy"}
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if _, err := session.Where("id = ?", 2).Update(&user2); err != nil {
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return err
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}
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if _, err := session.Exec("delete from userinfo where username = ?", user2.Username); err != nil {
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return err
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}
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return nil
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```
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* 在一个Go程中有事务
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```Go
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session := engine.NewSession()
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defer session.Close()
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// add Begin() before any action
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if err := session.Begin(); err != nil {
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// if returned then will rollback automatically
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return err
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}
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user1 := Userinfo{Username: "xiaoxiao", Departname: "dev", Alias: "lunny", Created: time.Now()}
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if _, err := session.Insert(&user1); err != nil {
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return err
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}
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user2 := Userinfo{Username: "yyy"}
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if _, err := session.Where("id = ?", 2).Update(&user2); err != nil {
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return err
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}
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if _, err := session.Exec("delete from userinfo where username = ?", user2.Username); err != nil {
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return err
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}
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// add Commit() after all actions
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return session.Commit()
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```
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# 案例
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* [Go语言中文网](http://studygolang.com/) - [github.com/studygolang/studygolang](https://github.com/studygolang/studygolang)
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