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README.md
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README.md
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@ -6,167 +6,306 @@ Yet Another ORM library for Go, aims for developer friendly
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* CURD
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* Chainable API
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* Embedded structs support
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* Before/After Create/Save/Update/Delete Callbacks
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* Order/Select/Limit/Offset Support
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* Update, Updates Like Rails's update_attribute, update_attributes
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* FirstOrInit, FirstOrCreate Like Rails's first_or_initialize, first_or_create
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* Dynamically set table name when search, update, delete...
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* Order/Select/Limit/Offset Support
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* Automatically CreatedAt, UpdatedAt
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* Soft Delete
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* Create table from struct
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* Create/Drop table from struct
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* Dynamically set table name when search, create, update, delete...
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* Prevent SQL Injection
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* Goroutines friendly
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* Database Pool
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* Convention Over Configuration (CoC)
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## Basic Usage
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```go
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db, _ = Open("postgres", "user=gorm dbname=gorm sslmode=disable")
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## Opening a Database
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type User struct {
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Id int64
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Age int64
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Birthday time.Time
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Name string
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CreatedAt time.Time
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UpdatedAt time.Time
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```go
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db, err = Open("postgres", "user=gorm dbname=gorm sslmode=disable")
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// Gorm is goroutines friendly, so you can create a global variable to keep the connection and use it everywhere
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var DB gorm.DB
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func init() {
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DB, err = gorm.Open("postgres", "user=gorm dbname=gorm sslmode=disable")
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if err != nil {
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panic(fmt.Sprintf("Got error when connect database, the error is '%v'", err))
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}
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}
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// Set database pool
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db.SetPool(10)
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// Set the maximum idle database connections
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db.SetPool(100)
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```
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// Create
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user = User{Name: "jinzhu", Age: 18, Birthday: time.Now()}
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## Conventions
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```go
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type User struct { // TableName: `users`, gorm will pluralize struct name as table name
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Id int64 // Id: Database Primary key
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Birthday time.Time // Time
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Age int64
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Name string
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CreatedAt time.Time // CreatedAt: Time of record is created, will be insert automatically
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UpdatedAt time.Time // UpdatedAt: Time of record is updated, will be updated automatically
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DeletedAt time.Time // DeletedAt: Time of record is deleted, refer Soft Delete for more
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Email []Email // Embedded structs
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BillingAddress Address // Embedded struct
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BillingAddressId int64 // Embedded struct's foreign key
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ShippingAddress Address // Embedded struct
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ShippingAddressId int64 // Embedded struct's foreign key
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}
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type Email struct { // TableName: `emails`
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Id int64
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UserId int64 // Foreign key for above embedded structs
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Email string
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Subscribed bool
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}
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type Address struct { // TableName: `addresses`
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Id int64
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Address1 string
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Address2 string
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Post string
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}
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```
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## Struct & Database Mapping
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```go
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// Create table from struct
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db.CreateTable(User{})
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// Drop table
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db.DropTable(User{})
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```
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## Create
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```go
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user := User{Name: "jinzhu", Age: 18, Birthday: time.Now()}
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db.Save(&user)
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```
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// Update
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## Update
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```go
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user.Name = "jinzhu 2"
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db.Save(&user)
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```
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// Delete
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## Delete
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```go
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db.Delete(&user)
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```
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// Get First matched record
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## Query
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```go
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// Get the first record
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db.First(&user)
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//// SELECT * FROM USERS LIMIT 1;
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// Get All records
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db.Find(&users)
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//// SELECT * FROM USERS;
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// Using a Primary Key
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db.First(&user, 10)
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//// SELECT * FROM USERS WHERE id = 10;
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```
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### Where (SQL like condition)
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```go
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// Get the first matched record
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db.Where("name = ?", "jinzhu").First(&user)
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//// SELECT * FROM users WHERE name = 'jinzhu' limit 1;
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// Get All matched records
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// Get all matched records
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db.Where("name = ?", "jinzhu").Find(&users)
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//// SELECT * FROM users WHERE name = 'jinzhu';
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// Advanced Where Usage
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db.Where("name <> ?", "jinzhu").Find(&users)
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//// users -> select * from users name <> 'jinzhu';
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db.Where(20).First(&user)
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//// users -> select * from users where id = 20;
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db.Where([]int64{20, 21, 22}).Find(&user)
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//// users -> select * from users where id in (20, 21, 22);
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db.Where("name = ? and age >= ?", "jinzhu", "22").Find(&users)
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//// users -> select * from users name = 'jinzhu' and age >= 22;
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//// SELECT * FROM users WHERE name <> 'jinzhu';
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// IN
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db.Where("name in (?)", []string["jinzhu", "jinzhu 2"]).Find(&users)
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//// users -> select * from users name in ('jinzhu', 'jinzhu 2');
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//// SELECT * FROM users WHERE name IN ('jinzhu', 'jinzhu 2');
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// IN For Primary Key
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db.Where([]int64{20, 21, 22}).Find(&users)
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//// SELECT * FROM users WHERE id IN (20, 21, 22);
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// LIKE
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db.Where("name LIKE ?", "%jin%").Find(&users)
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//// users -> select * from users name LIKE "%jinzhu%";
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//// SELECT * FROM users WHERE name LIKE "%jin%";
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// Multiple Conditions
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db.Where("name = ? and age >= ?", "jinzhu", "22").Find(&users)
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//// SELECT * FROM users WHERE name = 'jinzhu' AND age >= 22;
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```
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### Where (Struct & Map)
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```go
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// Search with struct
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db.Where(&User{Name: "jinzhu", Age: 20}).First(&user)
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//// user -> select * from users name = "jinzhu" and age = 20 limit 1;
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db.Where(map[string]interface{}{"name": "jinzhu", "age": 20}).First(&user)
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//// user -> select * from users name = "jinzhu" and age = 20 limit 1;
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db.Where("birthday < ?", time.Now()).Find(&users)
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//// SELECT * FROM users WHERE name = "jinzhu" AND age = 20 LIMIT 1;
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// Not
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db.Not([]int64{1,2,3}).First(&user)
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//// user -> select * from users where id NOT IN (1,2,3)
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db.Not([]int64{}).First(&user)
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//// user -> select * from users;
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// Search with map
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db.Where(map[string]interface{}{"name": "jinzhu", "age": 20}).Find(&users)
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//// SELECT * FROM users WHERE name = "jinzhu" AND age = 20;
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```
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### Not
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```go
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// Not Equal
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db.Not("name", "jinzhu").First(&user)
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//// user -> select * from users where name <> "jinzhu"
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//// SELECT * FROM users WHERE name <> "jinzhu" LIMIT 1;
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// Not In
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db.Not("name", []string{"jinzhu", "jinzhu 2"}).Find(&users)
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//// SELECT * FROM users WHERE name NOT IN ("jinzhu", "jinzhu 2");
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// Not In for Primary Key
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db.Not([]int64{1,2,3}).First(&user)
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//// SELECT * FROM users WHERE id NOT IN (1,2,3);
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db.Not([]int64{}).First(&user)
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//// SELECT * FROM users;
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// Normal SQL
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db.Not("name = ?", "jinzhu").First(&user)
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//// user -> select * from users where NOT(name = "jinzhu")
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db.Not("name <> ?", "jinzhu").First(&user)
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//// user -> select * from users where NOT(name <> "jinzhu")
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db.Not("name", []string{"jinzhu", "jinzhu 2"}).First(&user)
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//// user -> select * from users where name NOT IN ("jinzhu", "jinzhu 2")
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//// SELECT * FROM users WHERE NOT(name = "jinzhu");
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// Not With Struct
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db.Not(User{Name: "jinzhu"}).First(&user)
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//// user -> select * from users where name <> "jinzhu";
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//// SELECT * FROM users WHERE name <> "jinzhu";
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```
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// Inline search condition
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### Inline Search Condition
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```go
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// Find with primary key
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db.First(&user, 23)
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//// user -> select * from users where id = 23 limit 1;
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db.First(&user, "name = ?", "jinzhu")
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//// user -> select * from users where name = "jinzhu" limit 1;
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db.Find(&users, "name = ?", "jinzhu")
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//// users -> select * from users where name = "jinzhu";
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//// SELECT * FROM users WHERE id = 23 LIMIT 1;
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// Normal SQL
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db.Find(&user, "name = ?", "jinzhu")
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//// SELECT * FROM users WHERE name = "jinzhu";
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// Multiple Conditions
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db.Find(&users, "name <> ? and age > ?", "jinzhu", 20)
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//// users -> select * from users where name <> "jinzhu" and age > 20;
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db.Find(&users, &User{Age: 20})
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//// users -> select * from users where age = 20;
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//// SELECT * FROM users WHERE name <> "jinzhu" AND age > 20;
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// Inline Search With Struct
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db.Find(&users, User{Age: 20})
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//// SELECT * FROM users WHERE age = 20;
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// Inline Search With Map
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db.Find(&users, map[string]interface{}{"age": 20})
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//// users -> select * from users where age = 20;
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//// SELECT * FROM users WHERE age = 20;
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```
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## FirstOrInit
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Try to load the first record, if fails, initialize struct with search conditions.
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(only support map or struct conditions, SQL like conditions are not supported)
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```go
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db.FirstOrInit(&user, User{Name: "non_existing"})
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//// User{Name: "non_existing"}
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// FirstOrInit
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db.FirstOrInit(&user, User{Name: "noexisting_user"})
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//// user -> User{Name: "noexisting_user"}
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db.Where(User{Name: "Jinzhu"}).FirstOrInit(&user)
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//// user -> User{Id: 111, Name: "Jinzhu"}
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db.FirstOrInit(&user, map[string]interface{}{"name": "jinzhu", "age": 20})
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//// user -> User{Id: 111, Name: "Jinzhu", Age: 20}
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// FirstOrInit With Attrs
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db.Where(User{Name: "noexisting_user"}).Attrs(User{Age: 20}).FirstOrInit(&user)
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//// user -> select * from users where name = 'noexisting_user';
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//// If no record found, will assign the attrs to user, so user become:
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//// User{Name: "noexisting_user", Age: 20}
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db.Where(User{Name: "noexisting_user"}).Attrs("age", 20).FirstOrInit(&user)
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// Same as above
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db.Where(User{Name: "Jinzhu"}).Attrs(User{Age: 20}).FirstOrInit(&user)
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//// user -> select * from users where name = 'jinzhu';
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//// If found the user, will ingore the attrs:
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//// User{Id: 111, Name: "Jinzhu", Age: 18}
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// FirstOrInit With Assign
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db.Where(User{Name: "noexisting_user"}).Assign(User{Age: 20}).FirstOrInit(&user)
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//// user -> select * from users where name = 'noexisting_user';
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//// If no record found, will assign the value to user, so user become:
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//// User{Name: "noexisting_user", Age: 20} (same as FirstOrInit With Attrs)
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db.Where(User{Name: "noexisting_user"}).Assign("age", 20).FirstOrInit(&user)
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// Same as above
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//// user -> User{Name: "noexisting_user", Age: 20}
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db.Where(User{Name: "Jinzhu"}).Assign(User{Age: 20}).FirstOrInit(&user)
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//// user -> select * from users where name = 'jinzhu';
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//// If found the user, will assign the value to user, so user become: (different with FirstOrInit With Attrs)
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//// User{Id: 111, Name: "Jinzhu", Age: 20}
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// FirstOrCreate
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db.FirstOrCreate(&user, User{Name: "noexisting_user"})
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//// user -> User{Id: 112, Name: "noexisting_user"}
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db.FirstOrInit(&user, map[string]interface{}{"name": "jinzhu"})
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//// User{Id: 111, Name: "Jinzhu", Age: 20}
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```
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### FirstOrInit With Attrs
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Attr's arguments would be used to initialize struct if not record found, but won't be used for search
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```go
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db.Where(User{Name: "non_existing"}).Attrs(User{Age: 20}).FirstOrInit(&user)
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//// SELECT * FROM USERS WHERE name = 'non_existing';
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//// User{Name: "non_existing", Age: 20}
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// Above code could be simplified if have only one attribute
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db.Where(User{Name: "noexisting_user"}).Attrs("age", 20).FirstOrInit(&user)
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// If record found, Attrs would be ignored
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db.Where(User{Name: "Jinzhu"}).Attrs(User{Age: 30}).FirstOrInit(&user)
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//// SELECT * FROM USERS WHERE name = jinzhu';
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//// User{Id: 111, Name: "Jinzhu", Age: 20}
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### FirstOrInit With Assign
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Assign's arguments would be used to set the struct even record found, but won't be used for search
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```go
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db.Where(User{Name: "non_existing"}).Assign(User{Age: 20}).FirstOrInit(&user)
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//// User{Name: "non_existing", Age: 20}
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db.Where(User{Name: "Jinzhu"}).Assign(User{Age: 30}).FirstOrInit(&user)
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//// User{Id: 111, Name: "Jinzhu", Age: 30}
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```
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## FirstOrCreate
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Try to load the first record, if fails, initialize struct with search conditions and save it
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```go
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db.FirstOrCreate(&user, User{Name: "non_existing"})
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//// User{Id: 112, Name: "non_existing"}
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db.Where(User{Name: "Jinzhu"}).FirstOrCreate(&user)
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//// user -> User{Id: 111, Name: "Jinzhu"}
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db.FirstOrCreate(&user, map[string]interface{}{"name": "jinzhu", "age": 20})
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//// user -> User{Id: 111, Name: "Jinzhu", Age: 20}
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//// User{Id: 111, Name: "Jinzhu"}
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db.FirstOrCreate(&user, map[string]interface{}{"name": "jinzhu", "age": 30})
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//// user -> User{Id: 111, Name: "Jinzhu", Age: 20}
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```
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### FirstOrCreate With Attrs
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Attr's arguments would be used to initialize struct if not record found, but won't be used for search
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```go
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// FirstOrCreate With Attrs
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db.Where(User{Name: "noexisting_user"}).Attrs(User{Age: 20}).FirstOrCreate(&user)
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//// user -> select * from users where name = 'noexisting_user';
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//// If not record found, will assing the attrs to the user first, then create it
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//// Same as db.Where(User{Name: "noexisting_user"}).FirstOrCreate(&user).Update("age": 20), but one less sql
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db.Where(User{Name: "noexisting_user"}).Attrs("age", 20).FirstOrCreate(&user)
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// Save as above
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//// user -> User{Id: 112, Name: "noexisting_user", Age: 20}
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db.Where(User{Name: "Jinzhu"}).Attrs(User{Age: 20}).FirstOrCreate(&user)
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//// user -> select * from users where name = 'jinzhu';
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//// If found any record, will ignore the attrs
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//// user -> User{Id: 111, Name: "Jinzhu", Age: 18}
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db.Where(User{Name: "non_existing"}).Attrs(User{Age: 20}).FirstOrCreate(&user)
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//// SELECT * FROM users WHERE name = 'non_existing';
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//// User{Id: 112, Name: "non_existing", Age: 20}
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// FirstOrCreate With Assign
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db.Where(User{Name: "noexisting_user"}).Assign(User{Age: 20}).FirstOrCreate(&user)
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//// user -> select * from users where name = 'noexisting_user';
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//// If not record found, will assing the value to the user first, then create it
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//// user -> User{Id: 112, Name: "noexisting_user", Age: 20} (Same as FirstOrCreate With Attrs)
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db.Where(User{Name: "Jinzhu"}).Assign(User{Age: 20}).FirstOrCreate(&user)
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//// user -> select * from users where name = 'jinzhu';
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//// If any record found, will assing the value to the user and update it
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//// UPDATE users SET age=20 WHERE id = 111;
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//// user -> User{Id: 111, Name: "Jinzhu", Age: 20}
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db.Where(User{Name: "Jinzhu"}).Attrs(User{Age: 30}).FirstOrCreate(&user)
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//// User{Id: 111, Name: "Jinzhu", Age: 20}
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```
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### FirstOrCreate With Assign
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Assign's arguments would be used to initialize the struct if not record found,
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If any record found, will assign those values to the record, and save it back to database.
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```go
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db.Where(User{Name: "non_existing"}).Assign(User{Age: 20}).FirstOrCreate(&user)
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//// user -> User{Id: 112, Name: "non_existing", Age: 20}
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db.Where(User{Name: "Jinzhu"}).Assign(User{Age: 30}).FirstOrCreate(&user)
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//// UPDATE users SET age=30 WHERE id = 111;
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//// User{Id: 111, Name: "Jinzhu", Age: 30}
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```
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### SELECT
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```go
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//// user -> User{Id: 111, Name: "Jinzhu", Age: 18}
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//// You must noticed that the Attrs is similar to FirstOrInit with Attrs, yes?
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@ -227,10 +366,10 @@ Below callbacks are defined now:
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Callbacks is a function defined to a model, if the function return error, will prevent the database operations.
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func (u *User) BeforeUpdate() (err error) {
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if u.readonly() {
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err = errors.New("Read Only User")
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}
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return
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if u.readonly() {
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err = errors.New("Read Only User")
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}
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return
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}
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// Pluck (get users's age as map)
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@ -282,11 +421,11 @@ db.First(&user, 20).Updates(User{Name: "hello", Age: 18})
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// Soft Delete
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// For those struct have DeletedAt field, they will get soft delete ability automatically!
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type Order struct {
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Id int64
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Amount int64
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CreatedAt time.Time
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UpdatedAt time.Time
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DeletedAt time.Time
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Id int64
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||||
Amount int64
|
||||
CreatedAt time.Time
|
||||
UpdatedAt time.Time
|
||||
DeletedAt time.Time
|
||||
}
|
||||
order := order{Id:10}
|
||||
db.Delete(&order)
|
||||
|
|
@ -350,7 +489,6 @@ db.Where("email = ?", "x@example.org"').Attrs(User{FromIp: "111.111.111.111"}).F
|
|||
```
|
||||
|
||||
## TODO
|
||||
* SubStruct
|
||||
* Index, Unique, Valiations
|
||||
* Auto Migration
|
||||
* SQL Log
|
||||
|
|
|
|||
46
gorm_test.go
46
gorm_test.go
|
|
@ -12,12 +12,32 @@ import (
|
|||
)
|
||||
|
||||
type User struct {
|
||||
Id int64
|
||||
Id int64 // Id: Primary key
|
||||
Birthday time.Time // Time
|
||||
Age int64
|
||||
Birthday time.Time
|
||||
Name string
|
||||
CreatedAt time.Time
|
||||
UpdatedAt time.Time
|
||||
CreatedAt time.Time // CreatedAt: Time of record is created, will be insert automatically
|
||||
UpdatedAt time.Time // UpdatedAt: Time of record is updated, will be updated automatically
|
||||
DeletedAt time.Time // DeletedAt: Time of record is deleted, refer Soft Delete for more
|
||||
Email []Email // Embedded structs
|
||||
BillingAddress Address // Embedded struct
|
||||
BillingAddressId int64 // Embedded struct's foreign key
|
||||
ShippingAddress Address // Embedded struct
|
||||
ShippingAddressId int64 // Embedded struct's foreign key
|
||||
}
|
||||
|
||||
type Email struct {
|
||||
Id int64
|
||||
UserId int64 // Foreign key for above embedded structs
|
||||
Email string
|
||||
Subscribed bool
|
||||
}
|
||||
|
||||
type Address struct {
|
||||
Id int64
|
||||
Address1 string
|
||||
Address2 string
|
||||
Post string
|
||||
}
|
||||
|
||||
type Product struct {
|
||||
|
|
@ -1004,10 +1024,12 @@ type Category struct {
|
|||
type Post struct {
|
||||
Id int64
|
||||
CategoryId int64
|
||||
MainCategoryId int64
|
||||
Title string
|
||||
Body string
|
||||
Comments []Comment
|
||||
Category Category
|
||||
MainCategory Category
|
||||
}
|
||||
|
||||
type Comment struct {
|
||||
|
|
@ -1031,6 +1053,7 @@ func TestSubStruct(t *testing.T) {
|
|||
Body: "body 1",
|
||||
Comments: []Comment{{Content: "Comment 1"}, {Content: "Comment 2"}},
|
||||
Category: Category{Name: "Category 1"},
|
||||
MainCategory: Category{Name: "Main Category 1"},
|
||||
}
|
||||
|
||||
if err := db.Save(&post).Error; err != nil {
|
||||
|
|
@ -1043,7 +1066,7 @@ func TestSubStruct(t *testing.T) {
|
|||
|
||||
var p Post
|
||||
db.First(&p, post.Id)
|
||||
if post.CategoryId == 0 || p.CategoryId == 0 {
|
||||
if post.CategoryId == 0 || p.CategoryId == 0 || post.MainCategoryId == 0 || p.MainCategoryId == 0 {
|
||||
t.Errorf("Category Id should exist")
|
||||
}
|
||||
|
||||
|
|
@ -1066,3 +1089,16 @@ func TestSubStruct(t *testing.T) {
|
|||
comment3 := Comment{Content: "Comment 3", Post: Post{Title: "Title 3", Body: "Body 3"}}
|
||||
db.Save(&comment3)
|
||||
}
|
||||
|
||||
func TestT(t *testing.T) {
|
||||
user := User{Name: "jinzhu", Age: 18, Birthday: time.Now()}
|
||||
db.Save(&user)
|
||||
|
||||
var user2 User
|
||||
db.Where("name in (?)", []string{"1,2"}).First(&user2).Update("name", "hhh")
|
||||
debug(user2)
|
||||
|
||||
var users []User
|
||||
db.Find(&users, User{Age: 20})
|
||||
debug(users)
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue