dowaw80220
2019-06-18 16:27
浏览 812
已采纳

GORM不会将布尔字段更新为false

On updates gorm doesnt update boolean type to false. By default it updates to true, but when i try to update to false not changes. I dont see any errors also. What can be the issue ?

type Attendee struct {
    ID             uint   `gorm:"primary_key" gorm:"AUTO_INCREMENT" json:"id,omitempty" mapstructure:"id" csv:"ID"`
    Email          string `json:"email,omitempty" mapstructure:"email" csv:"Email,required"`

    ShowDirectory  bool   `json:"show_directory,omitempty" gorm:"default:true" mapstructure:"show_directory" csv:"-"`
}


var attendee Attendee
// JSON.unmarshal lines here for the &attendee
if err := service.DB.Model(&attendee).Updates(Attendee{
        Email:         attendee.Email,
        ShowDirectory: false
}).Error; err != nil {
    return Attendee{}, err
}

Alternate Solution:

This works, but I am updating multiple attributies. So, I cant use this.

    att := Attendee{ID: 1}
    service.DB.Model(&att).Update("ShowDirectory", false)
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2条回答 默认 最新

  • dsiy62758 2019-06-18 16:48
    已采纳

    As @mkopriva mentioned, by GORM Documentation

    // WARNING when update with struct, GORM will only update those fields that with non blank value

    // For below Update, nothing will be updated as "", 0, false are blank values of their types

    db.Model(&user).Updates(User{Name: "", Age: 0, Actived: false})

    Solved:

    if err := service.DB.Model(&attendee).Updates(map[string]interface{}{
        "Email":          attendee.Email,
        "ShowDirectory": false
    }).Error; err != nil {
        return Attendee{}, err
    }
    
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