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orm docs update
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# beego orm
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a powerful orm framework
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[](https://drone.io/github.com/astaxie/beego/latest)
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A powerful orm framework for go.
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It is heavily influenced by Django ORM, SQLAlchemy.
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now, beta, unstable, may be changing some api make your app build failed.
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@ -14,12 +18,25 @@ Passed all test, but need more feedback.
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**Features:**
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...
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* full go type support
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* easy for usage, simple CRUD operation
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* auto join with relation table
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* cross DataBase compatible query
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* Raw SQL query / mapper without orm model
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* full test keep stable and strong
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more features please read the docs
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**Install:**
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go get github.com/astaxie/beego/orm
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## Changelog
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* 2013-08-13: update test for database types
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* 2013-08-13: go type support, such as int8, uint8, byte, rune
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* 2013-08-13: date / datetime timezone support very well
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## Quick Start
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#### Simple Usage
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@ -143,5 +160,3 @@ more details and examples in docs and test
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- some unrealized api
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- examples
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- docs
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##
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@ -164,27 +164,91 @@ type Profile struct {
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```
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## Struct Field 类型与数据库的对应
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## 模型字段与数据库类型的对应
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现在 orm 支持下面的字段形式
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在此列出 orm 推荐的对应数据库类型，自动建表功能也会以此为标准。
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| go type | field type | mysql type
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| :--- | :--- | :---
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| bool | TypeBooleanField | tinyint
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| string | TypeCharField | varchar
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| string | TypeTextField | longtext
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| time.Time | TypeDateField | date
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| time.TIme | TypeDateTimeField | datetime
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| int16 |TypeSmallIntegerField | int(4)
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| int, int32 |TypeIntegerField | int(11)
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| int64 |TypeBigIntegerField | bigint(20)
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| uint, uint16 |TypePositiveSmallIntegerField | int(4) unsigned
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| uint32 |TypePositiveIntegerField | int(11) unsigned
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| uint64 |TypePositiveBigIntegerField | bigint(20) unsigned
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| float32, float64 | TypeFloatField | double
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| float32, float64 | TypeDecimalField | double(digits, decimals)
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默认所有的字段都是 **NOT NULL**
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关系型的字段，其字段类型取决于对应的主键。
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#### MySQL
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| go |mysql
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| :--- | :---
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| bool | bool
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| string - 设置 size 时 | varchar(size)
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| string | longtext
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| time.Time - 设置 type 为 date 时 | date
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| time.TIme | datetime
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| byte | tinyint unsigned
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| rune | integer
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| int | integer
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| int8 | tinyint
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| int16 | smallint
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| int32 | integer
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| int64 | bigint
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| uint | integer unsigned
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| uint8 | tinyint unsigned
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| uint16 | smallint unsigned
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| uint32 | integer unsigned
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| uint64 | bigint unsigned
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| float32 | double precision
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| float64 | double precision
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| float64 - 设置 digits, decimals 时 | numeric(digits, decimals)
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#### Sqlite3
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| go | sqlite3
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| :--- | :---
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| bool | bool
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| string - 设置 size 时 | varchar(size)
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| string | text
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| time.Time - 设置 type 为 date 时 | date
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| time.TIme | datetime
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| byte | tinyint unsigned
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| rune | integer
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| int | integer
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| int8 | tinyint
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| int16 | smallint
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| int32 | integer
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| int64 | bigint
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| uint | integer unsigned
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| uint8 | tinyint unsigned
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| uint16 | smallint unsigned
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| uint32 | integer unsigned
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| uint64 | bigint unsigned
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| float32 | real
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| float64 | real
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| float64 - 设置 digits, decimals 时 | decimal
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#### PostgreSQL
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| go | postgres
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| :--- | :---
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| bool | bool
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| string - 设置 size 时 | varchar(size)
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| string | text
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| time.Time - 设置 type 为 date 时 | date
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| time.TIme | timestamp with time zone
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| byte | smallint CHECK("column" >= 0 AND "column" <= 255)
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| rune | integer
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| int | integer
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| int8 | smallint CHECK("column" >= -127 AND "column" <= 128)
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| int16 | smallint
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| int32 | integer
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| int64 | bigint
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| uint | bigint CHECK("column" >= 0)
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| uint8 | smallint CHECK("column" >= 0 AND "column" <= 255)
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| uint16 | integer CHECK("column" >= 0)
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| uint32 | bigint CHECK("column" >= 0)
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| uint64 | bigint CHECK("column" >= 0)
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| float32 | double precision
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| float64 | double precision
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| float64 - 设置 digits, decimals 时 | numeric(digits, decimals)
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## 关系型字段
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其字段类型取决于对应的主键。
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* RelForeignKey
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* RelOneToOne
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@ -80,7 +80,7 @@ import (
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#### RegisterDriver
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三种数据库类型
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三种默认数据库类型
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```go
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orm.DR_MySQL
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@ -93,7 +93,7 @@ orm.DR_Postgres
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// 参数2 数据库类型
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// 这个用来设置 driverName 对应的数据库类型
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// mysql / sqlite3 / postgres 这三种是默认已经注册过的，所以可以无需设置
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orm.RegisterDriver("mysql", orm.DR_MySQL)
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orm.RegisterDriver("mymysql", orm.DR_MySQL)
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```
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#### RegisterDataBase
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@ -108,6 +108,56 @@ orm 必须注册一个名称为 `default` 的数据库，用以作为默认使
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orm.RegisterDataBase("default", "mysql", "root:root@/orm_test?charset=utf8", 30)
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```
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#### 时区设置
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orm 默认使用 time.Local 本地时区
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* 作用于 orm 自动创建的时间
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* 从数据库中取回的时间转换成 orm 本地时间
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如果需要的话，你也可以进行更改
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```go
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// 设置为 UTC 时间
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orm.DefaultTimeLoc = time.UTC
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```
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orm 在进行 RegisterDataBase 的同时，会获取数据库使用的时区，然后在 time.Time 类型存取的时做相应转换，以匹配时间系统，从而保证时间不会出错。
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**注意:** 鉴于 Sqlite3 的设计，存取默认都为 UTC 时间
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## RegisterModel
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如果使用 orm.QuerySeter 进行高级查询的话，这个是必须的。
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反之，如果只使用 Raw 查询和 map struct，是无需这一步的。您可以去查看 [Raw SQL 查询](Raw.md)
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将你定义的 Model 进行注册，最佳设计是有单独的 models.go 文件，在他的 init 函数中进行注册。
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迷你版 models.go
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```go
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package main
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import "github.com/astaxie/beego/orm"
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type User struct {
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Id int `orm:"auto"`
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name string
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}
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func init(){
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orm.RegisterModel(new(User))
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}
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```
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RegisterModel 也可以同时注册多个 model
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```go
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orm.RegisterModel(new(User), new(Profile), new(Post))
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```
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## ORM 接口使用
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使用 orm 必然接触的 Ormer 接口，我们来熟悉一下
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@ -15,7 +15,7 @@ qs = o.QueryTable(user) // 返回 QuerySeter
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```
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## expr
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QuerySeter 中用于描述字段和 sql 操作符使用简单的 expr 查询方法
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QuerySeter 中用于描述字段和 sql 操作符，使用简单的 expr 查询方法
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字段组合的前后顺序依照表的关系，比如 User 表拥有 Profile 的外键，那么对 User 表查询对应的 Profile.Age 为条件，则使用 `Profile__Age` 注意，字段的分隔符号使用双下划线 `__`，除了描述字段， expr 的尾部可以增加操作符以执行对应的 sql 操作。比如 `Profile__Age__gt` 代表 Profile.Age > 18 的条件查询。
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@ -1,8 +1,11 @@
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## 文档目录
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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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* [驱动类型设置](Orm.md#registerdriver)
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* [参数设置](Orm.md#registerdataBase)
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* [时区设置](Orm.md#时区设置)
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- [注册 ORM 使用的模型](Orm.md#registermodel)
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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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@ -15,6 +18,12 @@
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6. [模型定义](Models.md)
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- [Struct Tag 设置参数](Models.md#struct-tag-设置参数)
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- [表关系设置](Models.md#表关系设置)
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- [Struct Field 类型与数据库的对应](Models.md#struct-field-类型与数据库的对应)
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- [模型字段与数据库类型的对应](Models.md#模型字段与数据库类型的对应)
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7. Custom Fields
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8. Faq
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### 文档更新记录
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* 2013-08-13: ORM 的 [时区设置](Orm.md#时区设置)
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* 2013-08-13: [模型字段与数据库类型的对应](Models.md#模型字段与数据库类型的对应) 推荐的数据库对应使用的类型
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