go 数据库包之"github.com/didi/gendry/builder"

我从源码中找了一个例子 BuildUpdate

import (
    "database/sql"
    _ "github.com/go-sql-driver/mysql"
    qb "github.com/didi/gendry/builder"
)

#### `BuildUpdate`

sign: `BuildUpdate(table string, where map[string]interface{}, update map[string]interface{}) (string, []interface{}, error)`

BuildUpdate is very likely to BuildSelect but it **doesn't support**:

* _orderby
* _groupby
* _limit
* _having

``` go
where := map[string]interface{}{
    "foo <>": "aha",
    "bar <=": 45,
    "sex in": []interface{}{"girl", "boy"},
}
update := map[string]interface{}{
    "role": "primaryschoolstudent",
    "rank": 5,
}
cond,vals,err := qb.BuildUpdate("table_name", where, update)

db.Exec(cond, vals...)

// 查询条件的封装
where := map[string]interface{}{
    "foo <>": "aha",
    "bar <=": 45,
    "sex in": []interface{}{"girl", "boy"},
}

// 更新的数据
update := map[string]interface{}{
    "role": "primaryschoolstudent",
    "rank": 5,
}

// 函数传入 数据表名 查询条件 新数据  生成操作
cond,vals,err := qb.BuildUpdate("table_name", where, update)
// 执行更新操作
db.Exec(cond, vals...)