// when the length of mapValues is zero,return directly here
	// no need to call stmt.SelectAndOmitColumns method
	if len(mapValues) == 0 {
		stmt.AddError(gorm.ErrEmptySlice)
		return
	}

	var (
		result                    = make(map[string][]interface{}, len(mapValues))
		selectColumns, restricted = stmt.SelectAndOmitColumns(true, false)
	)

	for idx, mapValue := range mapValues {
		for k, v := range mapValue {

				return true
			}

			return false
		})
	}
}

func DeleteBeforeAssociations(db *gorm.DB) {
	if db.Error == nil && db.Statement.Schema != nil {
		selectColumns, restricted := db.Statement.SelectAndOmitColumns(true, false)
		if !restricted {
			return
		}

		for column, v := range selectColumns {
			if !v {
				continue
			}

			rel, ok := db.Statement.Schema.Relationships.Relations[column]

			return called
		})
	}
}

// ConvertToAssignments convert to update assignments
func ConvertToAssignments(stmt *gorm.Statement) (set clause.Set) {
	var (
		selectColumns, restricted = stmt.SelectAndOmitColumns(false, true)
		assignValue               func(field *schema.Field, value interface{})
	)

	switch stmt.ReflectValue.Kind() {
	case reflect.Slice, reflect.Array: