beego在定义model时不支持slice类型属性，那么如何定义多对多关系映射？？

按照beego官网例子写的代码 ： ``` type User struct { Id int Name string Profile string Post []*Post `orm:reverse(many)` //设置一对多的反向关系 } type Post struct { Id int Title string User *User `orm:rel(pk)` //设置一对多关系 Tags string } ``` 在main中运行程序，初始的时候会报错，如下： ``` field: models.User.Post, unsupport field type [], may be miss setting tag ``` 跟了一下源码，错误是在models_utils.go中，getFieldType函数内报的。 ``` if ft&IsFieldType == 0 { err = fmt.Errorf("unsupport field type %s, may be miss setting tag", val) } ``` 完整代码 ： ```go func getFieldType(val reflect.Value) (ft int, err error) { switch val.Type() { case reflect.TypeOf(new(int8)): ft = TypeBitField case reflect.TypeOf(new(int16)): ft = TypeSmallIntegerField case reflect.TypeOf(new(int32)), reflect.TypeOf(new(int)): ft = TypeIntegerField case reflect.TypeOf(new(int64)): ft = TypeBigIntegerField case reflect.TypeOf(new(uint8)): ft = TypePositiveBitField case reflect.TypeOf(new(uint16)): ft = TypePositiveSmallIntegerField case reflect.TypeOf(new(uint32)), reflect.TypeOf(new(uint)): ft = TypePositiveIntegerField case reflect.TypeOf(new(uint64)): ft = TypePositiveBigIntegerField case reflect.TypeOf(new(float32)), reflect.TypeOf(new(float64)): ft = TypeFloatField case reflect.TypeOf(new(bool)): ft = TypeBooleanField case reflect.TypeOf(new(string)): ft = TypeVarCharField case reflect.TypeOf(new(time.Time)): ft = TypeDateTimeField default: elm := reflect.Indirect(val) fmt.Println("ele.kind:", elm.Kind()) switch elm.Kind() { case reflect.Int8: ft = TypeBitField case reflect.Int16: ft = TypeSmallIntegerField //case reflect.Slice: //自己测试填加 // ft = RelReverseMany case reflect.Int32, reflect.Int: ft = TypeIntegerField case reflect.Int64: ft = TypeBigIntegerField case reflect.Uint8: ft = TypePositiveBitField case reflect.Uint16: ft = TypePositiveSmallIntegerField case reflect.Uint32, reflect.Uint: ft = TypePositiveIntegerField case reflect.Uint64: ft = TypePositiveBigIntegerField case reflect.Float32, reflect.Float64: ft = TypeFloatField case reflect.Bool: ft = TypeBooleanField case reflect.String: ft = TypeVarCharField default: if elm.Interface() == nil { panic(fmt.Errorf("%s is nil pointer, may be miss setting tag", val)) } switch elm.Interface().(type) { case sql.NullInt64: ft = TypeBigIntegerField case sql.NullFloat64: ft = TypeFloatField case sql.NullBool: ft = TypeBooleanField case sql.NullString: ft = TypeVarCharField case time.Time: ft = TypeDateTimeField } } } if ft&IsFieldType == 0 { err = fmt.Errorf("unsupport field type %s, may be miss setting tag", val) } ``` 从完整代码看，没有匹配slice这种类型，所以ft是零，导致报错。于是自己在新加了一个case ,上面代码中注释的两行，添加完后会报零值panic。 ``` panic: reflect: call of reflect.Value.Interface on zero Value ``` 官网给的例子，以及从网上查阅的资料都是这么写的，可以运行通过， 但是根据源码看确实不支持slice类型。所以如何想要做多对多的关系映射，使用beego框架该如何处理。 请指教，谢谢。