From 74a95f6cbf2d5a4e8023a3cd6b70b63da806c9e4 Mon Sep 17 00:00:00 2001 From: slene Date: Thu, 8 Aug 2013 11:07:08 +0800 Subject: [PATCH] docs update --- orm/README.md | 2 + orm/docs/zh/Models.md | 192 ++++++++++--------------------------- orm/docs/zh/Object.md | 16 ++-- orm/docs/zh/Orm.md | 58 ++++++++--- orm/docs/zh/Query.md | 96 ++++++++++--------- orm/docs/zh/README.md | 30 +++--- orm/docs/zh/Raw.md | 108 +++++++++++++++++++++ orm/docs/zh/Transaction.md | 3 + 8 files changed, 281 insertions(+), 224 deletions(-) create mode 100644 orm/docs/zh/Raw.md create mode 100644 orm/docs/zh/Transaction.md diff --git a/orm/README.md b/orm/README.md index 67b9eed3..b612672d 100644 --- a/orm/README.md +++ b/orm/README.md @@ -82,6 +82,8 @@ num, err := qs.Filter("User__Name", "slene").All(&posts) #### Use Raw sql +If you don't like ORM,use Raw SQL to query / mapping without ORM setting + ```go var maps []Params num, err := o.Raw("SELECT id FROM user WHERE name = ?", "slene").Values(&maps) diff --git a/orm/docs/zh/Models.md b/orm/docs/zh/Models.md index 76f8c345..d5ce7463 100644 --- a/orm/docs/zh/Models.md +++ b/orm/docs/zh/Models.md @@ -1,144 +1,8 @@ -## Model Definition +## 模型定义 -比较全面的 Model 定义例子,后文所有的例子如无特殊说明都以这个为基础。 +复杂的模型定义不是必须的,此功能用作数据库数据转换和自动建表 -当前还没有完成自动创建表的功能,所以提供一个 [Models.sql](Models.sql) 测试 - -note: 根据文档的更新,随时都可能更新这个 Model - -##### models.go: - -```go -package main - -import ( - "github.com/astaxie/beego/orm" - "time" -) - -type User struct { - Id int `orm:"auto"` // 设置为auto主键 - UserName string `orm:"size(30);unique"` // 设置字段为unique - Email string `orm:"size(100)"` // 设置string字段长度时,会使用varchar类型 - Password string `orm:"size(100)"` - Status int16 `orm:"choices(0,1,2,3);defalut(0)"` // choices设置可选值 - IsStaff bool `orm:"default(false)"` // default设置默认值 - IsActive bool `orm:"default(0)"` - Created time.Time `orm:"auto_now_add;type(date)"` // 创建时自动设置时间 - Updated time.Time `orm:"auto_now"` // 每次更新时自动设置时间 - Profile *Profile `orm:"null;rel(one);on_delete(set_null)"` // OneToOne relation, 级联删除时设置为NULL - Posts []*Post `orm:"reverse(many)" json:"-"` // fk 的反向关系 - orm.Manager `json:"-"` // 每个model都需要定义orm.Manager -} - -// 定义NewModel进行orm.Manager的初始化(必须) -func NewUser() *User { - obj := new(User) - obj.Manager.Init(obj) - return obj -} - -type Profile struct { - Id int `orm:"auto"` - Age int16 `` - Money float64 `` - User *User `orm:"reverse(one)" json:"-"` // 设置反向关系(字段可选) - orm.Manager `json:"-"` -} - -func (u *Profile) TableName() string { - return "profile" // 自定义表名 -} - -func NewProfile() *Profile { - obj := new(Profile) - obj.Manager.Init(obj) - return obj -} - -type Post struct { - Id int `orm:"auto"` - User *User `orm:"rel(fk)"` // RelForeignKey relation - Title string `orm:"size(60)"` - Content string `` - Created time.Time `` - Updated time.Time `` - Tags []*Tag `orm:"rel(m2m)"` // ManyToMany relation - orm.Manager `json:"-"` -} - -func NewPost() *Post { - obj := new(Post) - obj.Manager.Init(obj) - return obj -} - -type Tag struct { - Id int `orm:"auto"` - Name string `orm:"size(30)"` - Status int16 `orm:"choices(0,1,2);default(0)"` - Posts []*Post `orm:"reverse(many)" json:"-"` - orm.Manager `json:"-"` -} - -func NewTag() *Tag { - obj := new(Tag) - obj.Manager.Init(obj) - return obj -} - -type Comment struct { - Id int `orm:"auto"` - Post *Post `orm:"rel(fk)"` - Content string `` - Parent *Comment `orm:"null;rel(fk)"` // null设置allow NULL - Status int16 `orm:"choices(0,1,2);default(0)"` - Created time.Time `orm:"auto_now_add"` - orm.Manager `json:"-"` -} - -func NewComment() *Comment { - obj := new(Comment) - obj.Manager.Init(obj) - return obj -} - -func init() { - // 需要在init中注册定义的model - orm.RegisterModel(new(User), new(Profile)) - orm.RegisterModel(new(Post), new(Tag), new(Comment)) -} -``` - -## Field Type - -现在 orm 支持下面的字段形式 - -| go type | field type | mysql type -| :--- | :--- | :--- -| bool | TypeBooleanField | tinyint -| string | TypeCharField | varchar -| string | TypeTextField | longtext -| time.Time | TypeDateField | date -| time.TIme | TypeDateTimeField | datetime -| int16 |TypeSmallIntegerField | int(4) -| int, int32 |TypeIntegerField | int(11) -| int64 |TypeBigIntegerField | bigint(20) -| uint, uint16 |TypePositiveSmallIntegerField | int(4) unsigned -| uint32 |TypePositiveIntegerField | int(11) unsigned -| uint64 |TypePositiveBigIntegerField | bigint(20) unsigned -| float32, float64 | TypeFloatField | double -| float32, float64 | TypeDecimalField | double(digits, decimals) - -关系型的字段,其字段类型取决于对应的主键。 - -* RelForeignKey -* RelOneToOne -* RelManyToMany -* RelReverseOne -* RelReverseMany - -## Field Options +## Struct Tag 设置参数 ```go orm:"null;rel(fk)" ``` @@ -175,13 +39,26 @@ orm:"null;rel(fk)" 为字段设置 db 字段的名称 ```go -UserName `orm:"column(db_user_name)"` +Name `orm:"column(user_name)"` ``` #### default 为字段设置默认值,类型必须符合 ```go -Status int `orm:"default(1)"` +type User struct { + ... + Status int `orm:"default(1)"` +``` +仅当进行 orm.Manager 初始化时才会赋值 +```go +func NewUser() *User { + obj := new(User) + obj.Manager.Init(obj) + return obj +} + +u := NewUser() +fmt.Println(u.Status) // 1 ``` #### choices @@ -219,7 +96,7 @@ Updated time.Time `auto_now` ```go Created time.Time `orm:"auto_now_add;type(date)"` ``` -## Relation Field Options +## 表关系设置 #### rel / reverse @@ -290,4 +167,33 @@ type Profile struct { User *User `orm:"reverse(one)" json:"-"` // 删除 Profile 时将设置 User.Profile 的数据库字段为 NULL -``` \ No newline at end of file +``` + + +## Struct Field 类型与数据库的对应 + +现在 orm 支持下面的字段形式 + +| go type | field type | mysql type +| :--- | :--- | :--- +| bool | TypeBooleanField | tinyint +| string | TypeCharField | varchar +| string | TypeTextField | longtext +| time.Time | TypeDateField | date +| time.TIme | TypeDateTimeField | datetime +| int16 |TypeSmallIntegerField | int(4) +| int, int32 |TypeIntegerField | int(11) +| int64 |TypeBigIntegerField | bigint(20) +| uint, uint16 |TypePositiveSmallIntegerField | int(4) unsigned +| uint32 |TypePositiveIntegerField | int(11) unsigned +| uint64 |TypePositiveBigIntegerField | bigint(20) unsigned +| float32, float64 | TypeFloatField | double +| float32, float64 | TypeDecimalField | double(digits, decimals) + +关系型的字段,其字段类型取决于对应的主键。 + +* RelForeignKey +* RelOneToOne +* RelManyToMany +* RelReverseOne +* RelReverseMany \ No newline at end of file diff --git a/orm/docs/zh/Object.md b/orm/docs/zh/Object.md index 684f6067..3cb39d29 100644 --- a/orm/docs/zh/Object.md +++ b/orm/docs/zh/Object.md @@ -1,16 +1,14 @@ -## Object +## 对象的CRUD操作 对 object 操作简单的三个方法 Read / Insert / Update / Delete ```go o := orm.NewOrm() user := NewUser() -user.UserName = "slene" -user.Password = "password" -user.Email = "vslene@gmail.com" +user.Name = "slene" fmt.Println(o.Insert(user)) -user.UserName = "Your" +user.Name = "Your" fmt.Println(o.Update(user)) fmt.Println(o.Read(user)) fmt.Println(o.Delete(user)) @@ -27,16 +25,14 @@ if err == sql.ErrNoRows { } else if err == orm.ErrMissPK { fmt.Println("找不到主键") } else { - fmt.Println(user.Id, user.UserName) + fmt.Println(user.Id, user.Name) } ``` ### Insert ```go o := orm.NewOrm() var user User -user.UserName = "slene" -user.Password = "password" -user.Email = "vslene@gmail.com"[]() +user.Name = "slene" user.IsActive = true fmt.Println(o.Insert(&user)) @@ -49,7 +45,7 @@ fmt.Println(user.Id) o := orm.NewOrm() user := User{Id: 1} if o.Read(&user) == nil { - user.UserName = "MyName" + user.Name = "MyName" o.Update(&user) } ``` diff --git a/orm/docs/zh/Orm.md b/orm/docs/zh/Orm.md index a7ed5f61..db02d481 100644 --- a/orm/docs/zh/Orm.md +++ b/orm/docs/zh/Orm.md @@ -1,6 +1,40 @@ -## Orm +## Orm 使用方法 beego/orm 的使用例子 + +后文例子如无特殊说明都以这个为基础。 + +##### models.go: + +```go +package main + +import ( + "github.com/astaxie/beego/orm" +) + +type User struct { + Id int `orm:"auto"` // 设置为auto主键 + Name string + Profile *Profile `orm:"rel(one)"` // OneToOne relation + orm.Manager // 每个model都需要定义orm.Manager +} + +type Profile struct { + Id int `orm:"auto"` + Age int16 + User *User `orm:"reverse(one)"` // 设置反向关系(可选) + orm.Manager +} + +func init() { + // 需要在init中注册定义的model + orm.RegisterModel(new(User), new(Profile)) +} +``` + +##### main.go + ```go package main @@ -22,20 +56,18 @@ func main() { profile := NewProfile() profile.Age = 30 - profile.Money = 9.8 user := NewUser() user.Profile = profile - user.UserName = "slene" - user.Password = "password" - user.Email = "vslene@gmail.com" - user.IsActive = true + user.Name = "slene" fmt.Println(o.Insert(profile)) fmt.Println(o.Insert(user)) } ``` +## 数据库的设置 + #### RegisterDriver 三种数据库类型 @@ -66,12 +98,14 @@ orm 必须注册一个名称为 `default` 的数据库,用以作为默认使 orm.RegisterDataBase("default", "mysql", "root:root@/orm_test?charset=utf8", 30) ``` -## Ormer +## ORM 接口使用 + +使用 orm 必然接触的 Ormer 接口,我们来熟悉一下 ```go var o Ormer o = orm.NewOrm() // 创建一个 Ormer -// NewOrm 的同时会执行一次 orm.BootStrap,用以验证模型之间的定义并缓存。 +// NewOrm 的同时会执行 orm.BootStrap (整个 app 只执行一次),用以验证模型之间的定义并缓存。 ``` * type Ormer interface { @@ -84,9 +118,9 @@ o = orm.NewOrm() // 创建一个 Ormer * [LoadRel(Modeler, string) (int64, error)](Object.md#loadRel) * [QueryTable(interface{}) QuerySeter](#querytable) * [Using(string) error](#using) - * [Begin() error](Transaction.md#begin) - * [Commit() error](Transaction.md#commit) - * [Rollback() error](Transaction.md#rollback) + * [Begin() error](Transaction.md) + * [Commit() error](Transaction.md) + * [Rollback() error](Transaction.md) * [Raw(string, ...interface{}) RawSeter](#raw) * [Driver() Driver](#driver) * } @@ -133,7 +167,7 @@ Raw 函数,返回一个 [RawSeter](Raw.md) 用以对设置的 sql 语句和参 ```go o := NewOrm() var r RawSeter -r = o.Raw("UPDATE user SET user_name = ? WHERE user_name = ?", "testing", "slene") +r = o.Raw("UPDATE user SET name = ? WHERE name = ?", "testing", "slene") ``` #### Driver diff --git a/orm/docs/zh/Query.md b/orm/docs/zh/Query.md index 2e50997a..0ec31fcc 100644 --- a/orm/docs/zh/Query.md +++ b/orm/docs/zh/Query.md @@ -1,4 +1,4 @@ -## Query +## 高级查询 orm 以 **QuerySeter** 来组织查询,每个返回 **QuerySeter** 的方法都会获得一个新的 **QuerySeter** 对象。 @@ -29,8 +29,8 @@ qs.Filter("profile__age__gt", 18) // WHERE profile.age > 18 qs.Filter("profile__age__gte", 18) // WHERE profile.age >= 18 qs.Filter("profile__age__in", 18, 20) // WHERE profile.age IN (18, 20) -qs.Filter("profile__age__in", 18, 20).Exclude("profile__money__lt", 1000) -// WHERE profile.age IN (18, 20) AND NOT profile.money < 1000 +qs.Filter("profile__age__in", 18, 20).Exclude("profile__lt", 1000) +// WHERE profile.age IN (18, 20) AND NOT profile_id < 1000 ``` ## Operators @@ -51,27 +51,27 @@ qs.Filter("profile__age__in", 18, 20).Exclude("profile__money__lt", 1000) Filter / Exclude / Condition expr 的默认值 ```go -qs.Filter("user_name", "slene") // WHERE user_name = 'slene' -qs.Filter("user_name__exact", "slene") // WHERE user_name = 'slene' +qs.Filter("name", "slene") // WHERE name = 'slene' +qs.Filter("name__exact", "slene") // WHERE name = 'slene' // 使用 = 匹配,大小写是否敏感取决于数据表使用的 collation qs.Filter("profile", nil) // WHERE profile_id IS NULL ``` #### iexact ```go -qs.Filter("user_name__iexact", "slene") -// WHERE user_name LIKE 'slene' +qs.Filter("name__iexact", "slene") +// WHERE name LIKE 'slene' // 大小写不敏感,匹配任意 'Slene' 'sLENE' ``` #### contains ```go -qs.Filter("user_name__contains", "slene") -// WHERE user_name LIKE BINARY '%slene%' +qs.Filter("name__contains", "slene") +// WHERE name LIKE BINARY '%slene%' // 大小写敏感, 匹配包含 slene 的字符 ``` #### icontains ```go -qs.Filter("user_name__icontains", "slene") -// WHERE user_name LIKE '%slene%' +qs.Filter("name__icontains", "slene") +// WHERE name LIKE '%slene%' // 大小写不敏感, 匹配任意 'im Slene', 'im sLENE' ``` #### in @@ -97,26 +97,26 @@ qs.Filter("profile__age__lte", 18) ``` #### startswith ```go -qs.Filter("user_name__startswith", "slene") -// WHERE user_name LIKE BINARY 'slene%' +qs.Filter("name__startswith", "slene") +// WHERE name LIKE BINARY 'slene%' // 大小写敏感, 匹配以 'slene' 起始的字符串 ``` #### istartswith ```go -qs.Filter("user_name__istartswith", "slene") -// WHERE user_name LIKE 'slene%' +qs.Filter("name__istartswith", "slene") +// WHERE name LIKE 'slene%' // 大小写不敏感, 匹配任意以 'slene', 'Slene' 起始的字符串 ``` #### endswith ```go -qs.Filter("user_name__endswith", "slene") -// WHERE user_name LIKE BINARY '%slene' +qs.Filter("name__endswith", "slene") +// WHERE name LIKE BINARY '%slene' // 大小写敏感, 匹配以 'slene' 结束的字符串 ``` #### iendswith ```go -qs.Filter("user_name__startswith", "slene") -// WHERE user_name LIKE '%slene' +qs.Filter("name__startswith", "slene") +// WHERE name LIKE '%slene' // 大小写不敏感, 匹配任意以 'slene', 'Slene' 结束的字符串 ``` #### isnull @@ -128,9 +128,9 @@ qs.Filter("profile_id__isnull", true) qs.Filter("profile__isnull", false) // WHERE profile_id IS NOT NULL ``` -## QuerySeter +## 高级查询接口使用 -QuerySeter 当前支持的方法 +QuerySeter 是高级查询使用的接口,我们来熟悉下他的接口方法 * type QuerySeter interface { * [Filter(string, ...interface{}) QuerySeter](#filter) @@ -151,24 +151,30 @@ QuerySeter 当前支持的方法 * [ValuesFlat(*ParamsList, string) (int64, error)](#valuesflat) * } -每个返回 QuerySeter 的 api 调用时都会新建一个 QuerySeter,不影响之前创建的。 +* 每个返回 QuerySeter 的 api 调用时都会新建一个 QuerySeter,不影响之前创建的。 + +* 高级查询使用 Filter 和 Exclude 来做常用的条件查询。囊括两种清晰的过滤规则:包含, 排除 #### Filter +用来过滤查询结果,起到 **包含条件** 的作用 + 多个 Filter 之间使用 `AND` 连接 ```go -qs.Filter("profile__isnull", true).Filter("user_name", "slene") -// WHERE profile_id IS NULL AND user_name = 'slene' +qs.Filter("profile__isnull", true).Filter("name", "slene") +// WHERE profile_id IS NULL AND name = 'slene' ``` #### Exclude +用来过滤查询结果,起到 **排除条件** 的作用 + 使用 `NOT` 排除条件 多个 Exclude 之间使用 `AND` 连接 ```go -qs.Exclude("profile__isnull", true).Filter("user_name", "slene") -// WHERE NOT profile_id IS NULL AND user_name = 'slene' +qs.Exclude("profile__isnull", true).Filter("name", "slene") +// WHERE NOT profile_id IS NULL AND name = 'slene' ``` #### SetCond @@ -183,7 +189,7 @@ qs := orm.QueryTable("user") qs = qs.SetCond(cond1) // WHERE ... AND ... AND NOT ... OR ... -cond2 := cond.AndCond(cond1).OrCond(cond.And("user_name", "slene")) +cond2 := cond.AndCond(cond1).OrCond(cond.And("name", "slene")) qs = qs.SetCond(cond2).Count() // WHERE (... AND ... AND NOT ... OR ...) OR ( ... ) ``` @@ -228,8 +234,8 @@ qs.Offset(20) qs.OrderBy("id", "-profile__age") // ORDER BY id ASC, profile.age DESC -qs.OrderBy("-profile__money", "profile") -// ORDER BY profile.money DESC, profile_id ASC +qs.OrderBy("-profile__age", "profile") +// ORDER BY profile.age DESC, profile_id ASC ``` #### RelatedSel @@ -260,19 +266,19 @@ fmt.Printf("Count Num: %s, %s", cnt, err) #### Update 依据当前查询条件,进行批量更新操作 ```go -num, err := o.QueryTable("user").Filter("user_name", "slene").Update(orm.Params{ - "user_name": "astaxie", +num, err := o.QueryTable("user").Filter("name", "slene").Update(orm.Params{ + "name": "astaxie", }) fmt.Printf("Affected Num: %s, %s", num, err) -// SET user_name = "astaixe" WHERE user_name = "slene" +// SET name = "astaixe" WHERE name = "slene" ``` #### Delete 依据当前查询条件,进行批量删除操作 ```go -num, err := o.QueryTable("user").Filter("user_name", "slene").Delete() +num, err := o.QueryTable("user").Filter("name", "slene").Delete() fmt.Printf("Affected Num: %s, %s", num, err) -// DELETE FROM user WHERE user_name = "slene" +// DELETE FROM user WHERE name = "slene" ``` #### PrepareInsert @@ -282,7 +288,7 @@ fmt.Printf("Affected Num: %s, %s", num, err) ```go var users []*User ... -qs := dORM.QueryTable("user") +qs := o.QueryTable("user") i, _ := qs.PrepareInsert() for _, user := range users { id, err := i.Insert(user) @@ -290,8 +296,8 @@ for _, user := range users { ... } } -// PREPARE INSERT INTO user (`user_name`, ...) VALUES (?, ...) -// EXECUTE INSERT INTO user (`user_name`, ...) VALUES ("slene", ...) +// PREPARE INSERT INTO user (`name`, ...) VALUES (?, ...) +// EXECUTE INSERT INTO user (`name`, ...) VALUES ("slene", ...) // EXECUTE ... // ... i.Close() // 别忘记关闭 statement @@ -301,7 +307,7 @@ i.Close() // 别忘记关闭 statement 返回对应的结果集对象 ```go var users []*User -num, err := o.QueryTable("user").Filter("user_name", "slene").All(&users) +num, err := o.QueryTable("user").Filter("name", "slene").All(&users) fmt.Printf("Returned Rows Num: %s, %s", num, err) ``` @@ -311,7 +317,7 @@ fmt.Printf("Returned Rows Num: %s, %s", num, err) ```go var user *User -err := o.QueryTable("user").Filter("user_name", "slene").One(&user) +err := o.QueryTable("user").Filter("name", "slene").One(&user) if err == orm.ErrMultiRows { // 多条的时候报错 fmt.Printf("Returned Multi Rows Not One") @@ -333,7 +339,7 @@ num, err := o.QueryTable("user").Values(&maps) if err != nil { fmt.Printf("Result Nums: %d\n", num) for _, m := range maps { - fmt.Println(m["Id"], m["UserName"]) + fmt.Println(m["Id"], m["Name"]) } } ``` @@ -346,11 +352,11 @@ if err != nil { ```go var maps []orm.Params -num, err := o.QueryTable("user").Values(&maps, "id", "user_name", "profile", "profile__age") +num, err := o.QueryTable("user").Values(&maps, "id", "name", "profile", "profile__age") if err != nil { fmt.Printf("Result Nums: %d\n", num) for _, m := range maps { - fmt.Println(m["Id"], m["UserName"], m["Profile"], m["Profile__Age"]) + fmt.Println(m["Id"], m["Name"], m["Profile"], m["Profile__Age"]) // map 中的数据都是展开的,没有复杂的嵌套 } } @@ -379,11 +385,11 @@ if err != nil { ```go var lists []orm.ParamsList -num, err := o.QueryTable("user").ValuesList(&lists, "user_name", "profile__age") +num, err := o.QueryTable("user").ValuesList(&lists, "name", "profile__age") if err != nil { fmt.Printf("Result Nums: %d\n", num) for _, row := range lists { - fmt.Printf("UserName: %s, Age: %s\m", row[0], row[1]) + fmt.Printf("Name: %s, Age: %s\m", row[0], row[1]) } } ``` @@ -394,7 +400,7 @@ if err != nil { ```go var list orm.ParamsList -num, err := o.QueryTable("user").ValuesFlat(&list, "user_name") +num, err := o.QueryTable("user").ValuesFlat(&list, "name") if err != nil { fmt.Printf("Result Nums: %d\n", num) fmt.Printf("All User Names: %s", strings.Join(list, ", ") diff --git a/orm/docs/zh/README.md b/orm/docs/zh/README.md index a8ed158e..e7d80cc5 100644 --- a/orm/docs/zh/README.md +++ b/orm/docs/zh/README.md @@ -1,17 +1,19 @@ ## 文档目录 -1. [模型定义](Models.md) - - [支持的 Field 类型](Models.md#field-type) - - [Field 设置参数](Models.md#field-options) - - [关系型 Field 设置](Models.md#relation-field-options) -2. Custom Fields -3. [Orm 使用方法](Orm.md) - - [Ormer 接口](Orm.md#ormer) -4. [对象操作](Object.md) -5. [复杂查询](Query.md) - - [查询使用的表达式语法](Query.md#expr) - - [查询支持的操作符号](Query.md#operators) - - [QuerySeter 接口](Query.md#queryseter) -6. Raw -7. Transaction + +1. [Orm 使用方法](Orm.md) + - [数据库的设置](Orm.md#数据库的设置) + - [ORM 接口使用](Orm.md#orm-接口使用) +2. [对象的CRUD操作](Object.md) +3. [高级查询](Query.md) + - [使用的表达式语法](Query.md#expr) + - [支持的操作符号](Query.md#operators) + - [高级查询接口使用](Query.md#高级查询接口使用) +4. [使用SQL语句进行查询](Raw.md) +5. [事务处理](Transaction.md) +6. [模型定义](Models.md) + - [Struct Tag 设置参数](Models.md#struct-tag-设置参数) + - [表关系设置](Models.md#表关系设置) + - [Struct Field 类型与数据库的对应](Models.md#struct-field-类型与数据库的对应) +7. Custom Fields 8. Faq diff --git a/orm/docs/zh/Raw.md b/orm/docs/zh/Raw.md new file mode 100644 index 00000000..c01e5467 --- /dev/null +++ b/orm/docs/zh/Raw.md @@ -0,0 +1,108 @@ +## 使用SQL语句进行查询 + +使用 Raw SQL 查询,无需使用 ORM 表定义 + +创建一个 **RawSeter** + +```go +o := NewOrm() +var r RawSeter +r = o.Raw("UPDATE user SET name = ? WHERE name = ?", "testing", "slene") +``` + +* type RawSeter interface { + * [Exec() (int64, error)](#exec) + * [QueryRow(...interface{}) error](#queryrow) + * [QueryRows(...interface{}) (int64, error)](#queryrows) + * [SetArgs(...interface{}) RawSeter](#setargs) + * [Values(*[]Params) (int64, error)](#values) + * [ValuesList(*[]ParamsList) (int64, error)](#valueslist) + * [ValuesFlat(*ParamsList) (int64, error)](#valuesflat) + * [Prepare() (RawPreparer, error)](#prepare) +* } + +#### Exec + +执行sql语句 + +```go +num, err := r.Exec() +``` + +#### QueryRow + +TODO + +#### QueryRows + +TODO + +#### SetArgs + +改变 Raw(sql, args...) 中的 args 参数,返回一个新的 RawSeter + +用于单条 sql 语句,重复利用,替换参数然后执行。 + +```go +num, err := r.SetArgs("set name", "name1").Exec() +num, err := r.SetArgs("set name", "name2").Exec() +``` +#### Values / ValuesList / ValuesFlat + +Raw SQL 查询获得的结果集 Value 为 `string` 类型,NULL 字段的值为空 `` + +#### Values + + +返回结果集的 key => value 值 + +```go +var maps []orm.Params +num, err = o.Raw("SELECT user_name FROM user WHERE status = ?", 1).Values(&maps) +if err == nil && num > 0 { + fmt.Println(maps[0]["user_name"]) // slene +} +``` + +#### ValuesList + +返回结果集 slice + +```go +var lists []orm.ParamsList +num, err = o.Raw("SELECT user_name FROM user WHERE status = ?", 1).ValuesList(&lists) +if err == nil && num > 0 { + fmt.Println(lists[0][0]) // slene +} +``` + +#### ValuesFlat + +返回单一字段的平铺 slice 数据 + +```go +var list orm.ParamsList +num, err = o.Raw("SELECT id FROM user WHERE id < ?", 10).ValuesList(&list) +if err == nil && num > 0 { + fmt.Println(list) // []{"1","2","3",...} +} +``` + +#### Prepare + +用于一次 prepare 多次 exec,以提高批量执行的速度。 + +```go +p, err := o.Raw("UPDATE user SET name = ? WHERE name = ?").Prepare() +num, err := p.Exec("testing", "slene") +num, err = p.Exec("testing", "astaxie") +... +... +p.Close() // 别忘记关闭 statement +``` + +## FAQ + +1. 我的 app 需要支持多类型数据库,如何在使用 Raw SQL 的时候判断当前使用的数据库类型。 + +使用 Ormer 的 [Driver方法](Orm.md#driver) 可以进行判断 diff --git a/orm/docs/zh/Transaction.md b/orm/docs/zh/Transaction.md new file mode 100644 index 00000000..2742529c --- /dev/null +++ b/orm/docs/zh/Transaction.md @@ -0,0 +1,3 @@ +## 事务处理 + +