Gorm 一对多添加关联时，many表有unique。引发重复时不报错

go version go1.17.6 windows/amd64 gorm.io/driver/mysql v1.3.2 gorm.io/gorm v1.23.2

表结构:

type Users struct {
    Id           int64
    Username     string       `gorm:"size:64;uniqueIndex:username_project"`
    Password     string       `gorm:"size:512"`
    ProjectName  string       `gorm:"uniqueIndex:username_project"`
}


type Projects struct {
    Id      int64     `gorm:"primaryKey"`
    Name    string    `gorm:"size:64;unique"`
    Users   []Users   `gorm:"foreignKey:ProjectName;references:Name;constraint:OnUpdate:CASCADE,OnDelete:SET NULL"`
}

创建Users并添加关联时:

user:= Users{
    Username: "tony",
    Password: "123",
}
if err := DB.First(&models.Projects{}, id).Association("Users").Append(&user); err != nil {
    return false, err
}
return true, nil

第一次添加关联时可以正确创建Users并关联Projects。

再次创建时应该引发Duplicate entry 'xxx' for key 'projects.name' 异常 但是即得不到error也不能正确创建Users和添加关联

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Comment From: jinzhu

it will ignore those duplicated when creating associations