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orm update docs about debug log queries
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@ -107,6 +107,29 @@ if err != nil {
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```
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#### Debug Log Queries
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In development env, you can simple use
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```go
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func main() {
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orm.Debug = true
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...
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```
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enable log queries.
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output include all queries, such as exec / prepare / transaction.
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like this:
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```go
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[ORM] - 2013-08-09 13:18:16 - [Queries/default] - [ db.Exec / 0.4ms] - [INSERT INTO `user` (`name`) VALUES (?)] - `slene`
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...
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```
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note: not recommend use this in product env.
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## Docs
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more details and examples in docs and test
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@ -198,3 +198,46 @@ fmt.Println(dr.Name() == "db2") // true
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fmt.Println(dr.Type() == orm.DR_Sqlite) // true
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```
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## 调试模式打印查询语句
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简单的设置 Debug 为 true 打印查询的语句
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可能存在性能问题,不建议使用在产品模式
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```go
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func main() {
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orm.Debug = true
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...
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```
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默认使用 os.Stderr 输出日志信息
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改变输出到你自己的 io.Writer
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```go
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var w io.Writer
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...
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// 设置为你的 io.Writer
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...
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orm.DebugLog = orm.NewLog(w)
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```
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日志格式
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```go
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[ORM] - 时间 - [Queries/数据库名] - [执行操作/执行时间] - [SQL语句] - 使用标点 `,` 分隔的参数列表 - 打印遇到的错误
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```
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```go
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[ORM] - 2013-08-09 13:18:16 - [Queries/default] - [ db.Exec / 0.4ms] - [INSERT INTO `user` (`name`) VALUES (?)] - `slene`
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[ORM] - 2013-08-09 13:18:16 - [Queries/default] - [ db.Exec / 0.5ms] - [UPDATE `user` SET `name` = ? WHERE `id` = ?] - `astaxie`, `14`
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[ORM] - 2013-08-09 13:18:16 - [Queries/default] - [db.QueryRow / 0.4ms] - [SELECT `id`, `name` FROM `user` WHERE `id` = ?] - `14`
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[ORM] - 2013-08-09 13:18:16 - [Queries/default] - [ db.Exec / 0.4ms] - [INSERT INTO `post` (`user_id`,`title`,`content`) VALUES (?, ?, ?)] - `14`, `beego orm`, `powerful amazing`
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[ORM] - 2013-08-09 13:18:16 - [Queries/default] - [ db.Query / 0.4ms] - [SELECT T1.`name` `User__Name`, T0.`user_id` `User`, T1.`id` `User__Id` FROM `post` T0 INNER JOIN `user` T1 ON T1.`id` = T0.`user_id` WHERE T0.`id` = ? LIMIT 1000] - `68`
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[ORM] - 2013-08-09 13:18:16 - [Queries/default] - [ db.Exec / 0.4ms] - [DELETE FROM `user` WHERE `id` = ?] - `14`
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[ORM] - 2013-08-09 13:18:16 - [Queries/default] - [ db.Query / 0.3ms] - [SELECT T0.`id` FROM `post` T0 WHERE T0.`user_id` IN (?) ] - `14`
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[ORM] - 2013-08-09 13:18:16 - [Queries/default] - [ db.Exec / 0.4ms] - [DELETE FROM `post` WHERE `id` IN (?)] - `68`
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```
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日志内容包括 **所有的数据库操作**,事务,Prepare,等
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@ -4,6 +4,7 @@
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1. [Orm 使用方法](Orm.md)
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- [数据库的设置](Orm.md#数据库的设置)
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- [ORM 接口使用](Orm.md#orm-接口使用)
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- [调试模式打印查询语句](Orm.md#调试模式打印查询语句)
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2. [对象的CRUD操作](Object.md)
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3. [高级查询](Query.md)
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- [使用的表达式语法](Query.md#expr)
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@ -1,3 +1,17 @@
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## 事务处理
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orm 可以简单的进行事务操作
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```go
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o := NewOrm()
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err := o.Begin()
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// 事务处理过程
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...
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...
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// 此过程中的所有使用 o Ormer 对象的查询都在事务处理范围内
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if SomeError {
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err = o.Rollback()
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} else {
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err = o.Commit()
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}
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```
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