Gorm-- search you don't know

db.Table("hello").Find(&user{})
db.First(&user{},"code=?","l2222")
db.Select("name, age").Find(&users)    //Find Print results will be brought out 
db.Model(&user{}).Update("CreatedAt",time.Now())
db.Order("age desc").Order("name").Find(&users)
db.Model(&User{}).Where("name = ?", "jinzhu").Count(&count)

contain ：

// User  Contains a  CreditCard, UserID  For foreign key 
type User struct {
    gorm.Model
    CreditCard   CreditCard
}

type CreditCard struct {
    gorm.Model
    UserID   uint
    Number   string
}

var card CreditCard
var user User
db.Model(&user).Related(&card, "CreditCard")
 SELECT * FROM credit_cards WHERE user_id = 123; // 123 is user's primary key
// CreditCard yes user Field name of , That means getting user Of CreditCard Relationships and populates them into variables 
//  If the field name is the same as the type name of the variable , As shown in the example above , It can be omitted , Such as ：
db.Model(&user).Related(&card)