Gorm default value for slice

Default value for slice

Is there a way to declare a default value for slice like this?

type SoftwareComponent struct {
    Id             int                      `json:"id"`
    Name           string                   `json:"name"`
    Version        string                   `json:"version"`
    Licenses       dbtypes.StringSlice      `gorm:"default:['UNKNOWN']"`    // <-----  ???
}

Remark: dbtypes.StringSlice is []string with implemented Value() (driver.Value, error) and Scan(val interface{}) error

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Comment From: a631807682

( ... ) Value() (driver.Value, error) {
    // set value if fieldValue is null or empty
}

Comment From: nikhrom

but then the default value will be the same for all structures that use fields with the dbtypes.StringSlice type. And it is necessary that it be possible to assign a default value for a specific field of a specific struct

Comment From: a631807682

parse field.DefaultValue from string to string slice yourself

Comment From: nikhrom

Wouldn't it be difficult to show how to do it? I can't figure out exactly how to get the DefaultValue and where to parse it.

Thank you for your time

Comment From: a631807682

type struct .. {
    Licenses  dbtypes.StringSlice      `gorm:"default:['UNKNOWN']"`
}
func (StringSlice) Value(ctx context.Context, field *Field, dst reflect.Value, fieldValue interface{}) (interface{}, error) {
    // now field.DefaultValue is "['UNKNOWN']"

    // pseudo code, please use reflect
    if fieldValue == nil {
        return []string{"UNKNOWN"}, nil
    }
}

Comment From: nikhrom

Thanks!!!