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func getDefaultValues(db *gorm.DB, idx int) {
	insertTo := db.Statement.ReflectValue
	switch insertTo.Kind() {
	case reflect.Slice, reflect.Array:
		insertTo = insertTo.Index(idx)
	default:
	}

	for _, val := range db.Statement.Vars {
		switch v := val.(type) {
		case sql.Out:
			switch insertTo.Kind() {
			case reflect.Slice, reflect.Array:
				for i := insertTo.Len() - 1; i >= 0; i-- {
					rv := insertTo.Index(i)
					if reflect.Indirect(rv).Kind() != reflect.Struct {
						break
					}

					_, isZero := db.Statement.Schema.PrioritizedPrimaryField.ValueOf(db.Statement.Context, rv)
					if isZero {
						_ = db.AddError(db.Statement.Schema.PrioritizedPrimaryField.Set(db.Statement.Context, rv, v.Dest))
					}
				}
			case reflect.Struct:
				_, isZero := db.Statement.Schema.PrioritizedPrimaryField.ValueOf(db.Statement.Context, insertTo)
				if isZero {
					_ = db.AddError(db.Statement.Schema.PrioritizedPrimaryField.Set(db.Statement.Context, insertTo, v.Dest))
				}
			default:
                               
                                 // 会跳到这里 insertTo.Kind()  = 22, 是指针类型
				}
			}
		default:
		}
	}
}