func (context *Context) valueOf(valuer func(interface{}, *qor.Context) interface{}, value interface{}, meta *Meta) interface{} {
	if valuer != nil {
		reflectValue := reflect.ValueOf(value)
		if reflectValue.Kind() != reflect.Ptr {
			reflectPtr := reflect.New(reflectValue.Type())
			reflectPtr.Elem().Set(reflectValue)
			value = reflectPtr.Interface()
		}

		result := valuer(value, context.Context)

		if reflectValue := reflect.ValueOf(result); reflectValue.IsValid() {
			if reflectValue.Kind() == reflect.Ptr {
				if reflectValue.IsNil() || !reflectValue.Elem().IsValid() {
					return nil
				}

				result = reflectValue.Elem().Interface()
			}

			if meta.Type == "number" || meta.Type == "float" {
				if context.isNewRecord(value) && equal(reflect.Zero(reflect.TypeOf(result)).Interface(), result) {
					return nil
				}
			}
			return result
		} else {
			return nil
		}
	}

	utils.ExitWithMsg(fmt.Sprintf("No valuer found for meta %v of resource %v", meta.Name, meta.baseResource.Name))
	return nil
}

func (res *Resource) generateSections(values ...interface{}) []*Section {
	var sections []*Section
	var hasColumns []string
	var excludedColumns []string
	// Reverse values to make the last one as a key one
	// e.g. Name, Code, -Name (`-Name` will get first and will skip `Name`)
	for i := len(values) - 1; i >= 0; i-- {
		value := values[i]
		if section, ok := value.(*Section); ok {
			sections = append(sections, uniqueSection(section, &hasColumns))
		} else if column, ok := value.(string); ok {
			if strings.HasPrefix(column, "-") {
				excludedColumns = append(excludedColumns, column)
			} else if !isContainsColumn(excludedColumns, column) {
				sections = append(sections, &Section{Rows: [][]string{{column}}})
			}
			hasColumns = append(hasColumns, column)
		} else if row, ok := value.([]string); ok {
			for j := len(row) - 1; j >= 0; j-- {
				column = row[j]
				sections = append(sections, &Section{Rows: [][]string{{column}}})
				hasColumns = append(hasColumns, column)
			}
		} else {
			utils.ExitWithMsg(fmt.Sprintf("Qor Resource: attributes should be Section or String, but it is %+v", value))
		}
	}
	sections = reverseSections(sections)
	for _, section := range sections {
		section.Resource = *res
	}
	return sections
}

func (res *Resource) Meta(meta *Meta) *Meta {
	if res.GetMeta(meta.Name) != nil {
		utils.ExitWithMsg("Duplicated meta %v defined for resource %v", meta.Name, res.Name)
	}
	res.Metas = append(res.Metas, meta)
	meta.baseResource = res
	meta.updateMeta()
	return meta
}

func (context *Context) Execute(name string, result interface{}) {
	var tmpl *template.Template
	var cacheKey string

	if name == "show" && !context.Resource.isSetShowAttrs {
		name = "edit"
	}

	if context.Action == "" {
		context.Action = name
	}

	if context.Resource != nil {
		cacheKey = path.Join(context.resourcePath(), name)
	} else {
		cacheKey = name
	}

	if t, ok := templates[cacheKey]; !ok || true {
		if file, err := context.FindTemplate("layout.tmpl"); err == nil {
			if tmpl, err = template.New(filepath.Base(file)).Funcs(context.FuncMap()).ParseFiles(file); err == nil {
				for _, name := range []string{"header", "footer"} {
					if tmpl.Lookup(name) == nil {
						if file, err := context.FindTemplate(name + ".tmpl"); err == nil {
							tmpl.ParseFiles(file)
						}
					} else {
						utils.ExitWithMsg(err)
					}
				}
			} else {
				utils.ExitWithMsg(err)
			}
		}
	} else {
		tmpl = t
	}

	context.Result = result
	context.Content = context.Render(name, result)
	if err := tmpl.Execute(context.Writer, context); err != nil {
		utils.ExitWithMsg(err)
	}
}

func (context *Context) RenderMeta(meta *Meta, value interface{}, prefix []string, metaType string, writer *bytes.Buffer) {
	prefix = append(prefix, meta.Name)

	funcsMap := context.FuncMap()
	funcsMap["render_form"] = func(value interface{}, sections []*Section, index ...int) template.HTML {
		var result = bytes.NewBufferString("")
		newPrefix := append([]string{}, prefix...)

		if len(index) > 0 {
			last := newPrefix[len(newPrefix)-1]
			newPrefix = append(newPrefix[:len(newPrefix)-1], fmt.Sprintf("%v[%v]", last, index[0]))
		}

		for _, field := range context.GetDB().NewScope(value).PrimaryFields() {
			if meta := sections[0].Resource.GetMetaOrNew(field.Name); meta != nil {
				context.RenderMeta(meta, value, newPrefix, "form", result)
			}
		}

		context.renderForm(value, sections, newPrefix, result)

		return template.HTML(result.String())
	}

	var tmpl *template.Template
	var err error
	if file, err := context.FindTemplate(fmt.Sprintf("metas/%v/%v.tmpl", metaType, meta.Name), fmt.Sprintf("metas/%v/%v.tmpl", metaType, meta.Type)); err == nil {
		tmpl, err = template.New(filepath.Base(file)).Funcs(funcsMap).ParseFiles(file)
	} else {
		tmpl, err = template.New(meta.Type + ".tmpl").Funcs(funcsMap).Parse("{{.Value}}")
	}

	if err == nil {
		var scope = context.GetDB().NewScope(value)
		var data = map[string]interface{}{
			"Context":       context,
			"BaseResource":  meta.baseResource,
			"ResourceValue": value,
			"InputId":       fmt.Sprintf("%v_%v_%v", scope.GetModelStruct().ModelType.Name(), scope.PrimaryKeyValue(), meta.Name),
			"Label":         meta.Label,
			"InputName":     strings.Join(prefix, "."),
			"Value":         context.FormattedValueOf(value, meta),
			"Meta":          meta,
		}

		if meta.GetCollection != nil {
			data["CollectionValue"] = meta.GetCollection(value, context.Context)
		}

		err = tmpl.Execute(writer, data)
	}

	if err != nil {
		utils.ExitWithMsg(fmt.Sprintf("got error when render %v template for %v(%v):%v", metaType, meta.Name, meta.Type, err))
	}
}

func (context *Context) renderMeta(writer *bytes.Buffer, meta *Meta, value interface{}, prefix []string) {
	prefix = append(prefix, meta.Name)

	funcsMap := context.FuncMap()
	funcsMap["render_form"] = func(value interface{}, metas []*Meta, index ...int) template.HTML {
		var result = bytes.NewBufferString("")
		newPrefix := append([]string{}, prefix...)

		if len(index) > 0 {
			last := newPrefix[len(newPrefix)-1]
			newPrefix = append(newPrefix[:len(newPrefix)-1], fmt.Sprintf("%v[%v]", last, index[0]))
		}

		context.renderForm(result, value, metas, newPrefix)
		return template.HTML(result.String())
	}

	var tmpl = template.New(meta.Type + ".tmpl").Funcs(funcsMap)

	if tmpl, err := context.FindTemplate(tmpl, fmt.Sprintf("metas/form/%v.tmpl", meta.Type)); err == nil {
		data := map[string]interface{}{}
		data["Base"] = meta.base
		scope := context.GetDB().NewScope(value)
		data["InputId"] = fmt.Sprintf("%v_%v_%v", scope.GetModelStruct().ModelType.Name(), scope.PrimaryKeyValue(), meta.Name)
		data["Label"] = meta.Label
		data["InputName"] = strings.Join(prefix, ".")
		data["Result"] = value
		data["Value"] = context.ValueOf(value, meta)

		if meta.GetCollection != nil {
			data["CollectionValue"] = meta.GetCollection(value, context.Context)
		}

		data["Meta"] = meta

		if err := tmpl.Execute(writer, data); err != nil {
			utils.ExitWithMsg(fmt.Sprintf("got error when parse template for %v(%v):%v", meta.Name, meta.Type, err))
		}
	} else {
		utils.ExitWithMsg(fmt.Sprintf("%v: form type %v not supported: got error %v", meta.Name, meta.Type, err))
	}
}

func (context *Context) Render(name string, results ...interface{}) template.HTML {
	if file, err := context.FindTemplate(name + ".tmpl"); err == nil {
		var clone = context.clone()
		var result = bytes.NewBufferString("")

		if len(results) > 0 {
			clone.Result = results[0]
		}

		if tmpl, err := template.New(filepath.Base(file)).Funcs(clone.FuncMap()).ParseFiles(file); err == nil {
			if err := tmpl.Execute(result, clone); err != nil {
				utils.ExitWithMsg(err)
			}
		} else {
			utils.ExitWithMsg(err)
		}
		return template.HTML(result.String())
	}

	return ""
}

func isContainsPositiveValue(values ...interface{}) bool {
	for _, value := range values {
		if _, ok := value.(*Section); ok {
			return true
		} else if column, ok := value.(string); ok {
			if !strings.HasPrefix(column, "-") {
				return true
			}
		} else {
			utils.ExitWithMsg(fmt.Sprintf("Qor Resource: attributes should be Section or String, but it is %+v", value))
		}
	}
	return false
}

func (context *Context) renderIndexMeta(value interface{}, meta *Meta) template.HTML {
	var err error
	var result = bytes.NewBufferString("")
	var tmpl = template.New(meta.Type + ".tmpl").Funcs(context.FuncMap())

	if tmpl, err = context.FindTemplate(tmpl, fmt.Sprintf("metas/index/%v.tmpl", meta.Type)); err != nil {
		tmpl, _ = tmpl.Parse("{{.Value}}")
	}

	data := map[string]interface{}{"Value": context.ValueOf(value, meta), "Meta": meta}
	if err := tmpl.Execute(result, data); err != nil {
		utils.ExitWithMsg(err.Error())
	}
	return template.HTML(result.String())
}

func (publish *Publish) ConfigureQorResource(res *admin.Resource) {
	if !injected {
		injected = true
		for _, gopath := range strings.Split(os.Getenv("GOPATH"), ":") {
			admin.RegisterViewPath(path.Join(gopath, "src/github.com/qor/qor/publish/views"))
		}
	}
	res.UseTheme("publish")

	if event := res.GetAdmin().GetResource("PublishEvent"); event == nil {
		eventResource := res.GetAdmin().AddResource(&PublishEvent{}, &admin.Config{Invisible: true})
		eventResource.IndexAttrs("Name", "Description", "CreatedAt")
	}

	controller := publishController{publish}
	router := res.GetAdmin().GetRouter()
	router.Get(fmt.Sprintf("^/%v/diff/", res.ToParam()), controller.Diff)
	router.Get(fmt.Sprintf("^/%v", res.ToParam()), controller.Preview)
	router.Post(fmt.Sprintf("^/%v", res.ToParam()), controller.PublishOrDiscard)

	res.GetAdmin().RegisterFuncMap("render_publish_meta", func(value interface{}, meta *admin.Meta, context *admin.Context) template.HTML {
		var err error
		var result = bytes.NewBufferString("")
		var tmpl = template.New(meta.Type + ".tmpl").Funcs(context.FuncMap())

		if tmpl, err = context.FindTemplate(tmpl, fmt.Sprintf("metas/publish/%v.tmpl", meta.Type)); err != nil {
			if tmpl, err = context.FindTemplate(tmpl, fmt.Sprintf("metas/index/%v.tmpl", meta.Type)); err != nil {
				tmpl, _ = tmpl.Parse("{{.Value}}")
			}
		}

		data := map[string]interface{}{"Value": context.ValueOf(value, meta), "Meta": meta}
		if err := tmpl.Execute(result, data); err != nil {
			utils.ExitWithMsg(err.Error())
		}
		return template.HTML(result.String())
	})

	res.GetAdmin().RegisterFuncMap("publish_unique_key", func(res *admin.Resource, record interface{}, context *admin.Context) string {
		return fmt.Sprintf("%s__%v", res.ToParam(), context.GetDB().NewScope(record).PrimaryKeyValue())
	})

	res.GetAdmin().RegisterFuncMap("is_publish_event_resource", func(res *admin.Resource) bool {
		return IsPublishEvent(res.Value)
	})
}

func (res *Resource) setSections(sections *[]*Section, values ...interface{}) {
	if len(*sections) > 0 && len(values) == 0 {
		return
	}
	if len(*sections) == 0 && len(values) == 0 {
		*sections = res.generateSections(res.allAttrs())
	} else {
		var flattenValues []interface{}
		for _, value := range values {
			if columns, ok := value.([]string); ok {
				for _, column := range columns {
					flattenValues = append(flattenValues, column)
				}
			} else if _sections, ok := value.([]*Section); ok {
				for _, section := range _sections {
					flattenValues = append(flattenValues, section)
				}
			} else if section, ok := value.(*Section); ok {
				flattenValues = append(flattenValues, section)
			} else if column, ok := value.(string); ok {
				flattenValues = append(flattenValues, column)
			} else {
				utils.ExitWithMsg(fmt.Sprintf("Qor Resource: attributes should be Section or String, but it is %+v", value))
			}
		}
		if isContainsPositiveValue(flattenValues...) {
			*sections = res.generateSections(flattenValues...)
		} else {
			var valueStrs []string
			var availbleColumns []string
			for _, value := range flattenValues {
				if column, ok := value.(string); ok {
					valueStrs = append(valueStrs, column)
				}
			}

			for _, column := range res.allAttrs() {
				if !isContainsColumn(valueStrs, column) {
					availbleColumns = append(availbleColumns, column)
				}
			}
			*sections = res.generateSections(availbleColumns)
		}
	}
}

func (meta *Meta) PreInitialize() error {
	if meta.Name == "" {
		utils.ExitWithMsg("Meta should have name: %v", reflect.TypeOf(meta))
	} else if meta.FieldName == "" {
		meta.FieldName = meta.Name
	}

	// parseNestedField used to handle case like Profile.Name
	var parseNestedField = func(value reflect.Value, name string) (reflect.Value, string) {
		fields := strings.Split(name, ".")
		value = reflect.Indirect(value)
		for _, field := range fields[:len(fields)-1] {
			value = value.FieldByName(field)
		}

		return value, fields[len(fields)-1]
	}

	var getField = func(fields []*gorm.StructField, name string) *gorm.StructField {
		for _, field := range fields {
			if field.Name == name || field.DBName == name {
				return field
			}
		}
		return nil
	}

	var nestedField = strings.Contains(meta.FieldName, ".")
	var scope = &gorm.Scope{Value: meta.Resource.GetResource().Value}
	if nestedField {
		subModel, name := parseNestedField(reflect.ValueOf(meta.Resource.GetResource().Value), meta.FieldName)
		meta.FieldStruct = getField(scope.New(subModel.Interface()).GetStructFields(), name)
	} else {
		meta.FieldStruct = getField(scope.GetStructFields(), meta.FieldName)
	}
	return nil
}

//.........这里部分代码省略.........
	{ // Set Meta Resource
		if hasColumn && (meta.FieldStruct.Relationship != nil) {
			if meta.Resource == nil {
				var result interface{}
				if fieldType.Kind() == reflect.Struct {
					result = reflect.New(fieldType).Interface()
				} else if fieldType.Kind() == reflect.Slice {
					refelectType := fieldType.Elem()
					for refelectType.Kind() == reflect.Ptr {
						refelectType = refelectType.Elem()
					}
					result = reflect.New(refelectType).Interface()
				}

				res := meta.baseResource.GetAdmin().NewResource(result)
				res.configure()
				meta.Resource = res
			}

			if meta.Resource != nil {
				permission := meta.Resource.Permission.Concat(meta.Meta.Permission)
				meta.Resource.Permission = permission
				meta.SetPermission(permission)
				meta.setBaseResource(meta.baseResource)
			}
		}
	}

	scope := &gorm.Scope{Value: meta.baseResource.Value}
	scopeField, _ := scope.FieldByName(meta.GetFieldName())

	{ // Format Meta FormattedValueOf
		if meta.FormattedValuer == nil {
			if meta.Type == "select_one" {
				meta.SetFormattedValuer(func(value interface{}, context *qor.Context) interface{} {
					return utils.Stringify(meta.GetValuer()(value, context))
				})
			} else if meta.Type == "select_many" {
				meta.SetFormattedValuer(func(value interface{}, context *qor.Context) interface{} {
					reflectValue := reflect.Indirect(reflect.ValueOf(meta.GetValuer()(value, context)))
					var results []string
					for i := 0; i < reflectValue.Len(); i++ {
						results = append(results, utils.Stringify(reflectValue.Index(i).Interface()))
					}
					return results
				})
			}
		}
	}

	{ // Format Meta Collection
		if meta.Collection != nil {
			if maps, ok := meta.Collection.([]string); ok {
				meta.GetCollection = func(interface{}, *qor.Context) (results [][]string) {
					for _, value := range maps {
						results = append(results, []string{value, value})
					}
					return
				}
			} else if maps, ok := meta.Collection.([][]string); ok {
				meta.GetCollection = func(interface{}, *qor.Context) [][]string {
					return maps
				}
			} else if f, ok := meta.Collection.(func(interface{}, *qor.Context) [][]string); ok {
				meta.GetCollection = f
			} else {
				utils.ExitWithMsg("Unsupported Collection format for meta %v of resource %v", meta.Name, reflect.TypeOf(meta.baseResource.Value))
			}
		} else if meta.Type == "select_one" || meta.Type == "select_many" {
			if scopeField.Relationship != nil {
				fieldType := scopeField.StructField.Struct.Type
				if fieldType.Kind() == reflect.Slice {
					fieldType = fieldType.Elem()
				}

				meta.GetCollection = func(value interface{}, context *qor.Context) (results [][]string) {
					values := reflect.New(reflect.SliceOf(fieldType)).Interface()
					context.GetDB().Find(values)
					reflectValues := reflect.Indirect(reflect.ValueOf(values))
					for i := 0; i < reflectValues.Len(); i++ {
						scope := scope.New(reflectValues.Index(i).Interface())
						primaryKey := fmt.Sprintf("%v", scope.PrimaryKeyValue())
						results = append(results, []string{primaryKey, utils.Stringify(reflectValues.Index(i).Interface())})
					}
					return
				}
			} else {
				utils.ExitWithMsg("%v meta type %v needs Collection", meta.Name, meta.Type)
			}
		}
	}

	meta.FieldName = meta.GetFieldName()

	if meta.FieldStruct != nil {
		if injector, ok := reflect.New(meta.FieldStruct.Struct.Type).Interface().(resource.ConfigureMetaInterface); ok {
			injector.ConfigureQorMeta(meta)
		}
	}
}

//.........这里部分代码省略.........
			} else if relationship.Kind == "belongs_to" {
				meta.Type = "select_one"
			} else if relationship.Kind == "many_to_many" {
				meta.Type = "select_many"
			}
		} else {
			switch fieldType.Kind().String() {
			case "string":
				if size, ok := utils.ParseTagOption(field.Tag.Get("sql"))["SIZE"]; ok {
					if i, _ := strconv.Atoi(size); i > 255 {
						meta.Type = "text"
					} else {
						meta.Type = "string"
					}
				} else if text, ok := utils.ParseTagOption(field.Tag.Get("sql"))["TYPE"]; ok && text == "text" {
					meta.Type = "text"
				} else {
					meta.Type = "string"
				}
			case "bool":
				meta.Type = "checkbox"
			default:
				if regexp.MustCompile(`^(.*)?(u)?(int)(\d+)?`).MatchString(fieldType.Kind().String()) {
					meta.Type = "number"
				} else if regexp.MustCompile(`^(.*)?(float)(\d+)?`).MatchString(fieldType.Kind().String()) {
					meta.Type = "float"
				} else if _, ok := reflect.New(fieldType).Interface().(*time.Time); ok {
					meta.Type = "datetime"
				} else if _, ok := reflect.New(fieldType).Interface().(media_library.MediaLibrary); ok {
					meta.Type = "file"
				}
			}
		}
	}

	// Set Meta Resource
	if meta.Resource == nil {
		if hasColumn && (field.Relationship != nil) {
			var result interface{}
			if fieldType.Kind().String() == "struct" {
				result = reflect.New(fieldType).Interface()
			} else if fieldType.Kind().String() == "slice" {
				refelectType := fieldType.Elem()
				for refelectType.Kind() == reflect.Ptr {
					refelectType = refelectType.Elem()
				}
				result = reflect.New(refelectType).Interface()
			}

			res := meta.base.GetAdmin().NewResource(result)
			res.compile()
			meta.Resource = res
		}
	}

	scopeField, _ := scope.FieldByName(meta.GetFieldName())

	// Set Meta Collection
	if meta.Collection != nil {
		if maps, ok := meta.Collection.([]string); ok {
			meta.GetCollection = func(interface{}, *qor.Context) (results [][]string) {
				for _, value := range maps {
					results = append(results, []string{value, value})
				}
				return
			}
		} else if maps, ok := meta.Collection.([][]string); ok {
			meta.GetCollection = func(interface{}, *qor.Context) [][]string {
				return maps
			}
		} else if f, ok := meta.Collection.(func(interface{}, *qor.Context) [][]string); ok {
			meta.GetCollection = f
		} else {
			utils.ExitWithMsg("Unsupported Collection format for meta %v of resource %v", meta.Name, reflect.TypeOf(meta.base.Value))
		}
	} else if meta.Type == "select_one" || meta.Type == "select_many" {
		if scopeField.Relationship != nil {
			fieldType := scopeField.StructField.Struct.Type
			if fieldType.Kind() == reflect.Slice {
				fieldType = fieldType.Elem()
			}

			meta.GetCollection = func(value interface{}, context *qor.Context) (results [][]string) {
				values := reflect.New(reflect.SliceOf(fieldType)).Interface()
				context.GetDB().Find(values)
				reflectValues := reflect.Indirect(reflect.ValueOf(values))
				for i := 0; i < reflectValues.Len(); i++ {
					scope := scope.New(reflectValues.Index(i).Interface())
					primaryKey := fmt.Sprintf("%v", scope.PrimaryKeyValue())
					results = append(results, []string{primaryKey, utils.Stringify(reflectValues.Index(i).Interface())})
				}
				return
			}
		} else {
			utils.ExitWithMsg("%v meta type %v needs Collection", meta.Name, meta.Type)
		}
	}

	meta.FieldName = meta.GetFieldName()
}

func (mediaBox MediaBox) ConfigureQorMeta(metaor resource.Metaor) {
	if meta, ok := metaor.(*admin.Meta); ok {
		if meta.Config == nil {
			meta.Config = &MediaBoxConfig{}
		}

		if meta.FormattedValuer == nil {
			meta.FormattedValuer = func(record interface{}, context *qor.Context) interface{} {
				if mediaBox, ok := meta.GetValuer()(record, context).(*MediaBox); ok {
					return mediaBox.URL()
				}
				return ""
			}
			meta.SetFormattedValuer(meta.FormattedValuer)
		}

		if config, ok := meta.Config.(*MediaBoxConfig); ok {
			Admin := meta.GetBaseResource().(*admin.Resource).GetAdmin()
			if config.RemoteDataResource == nil {
				mediaLibraryResource := Admin.GetResource("MediaLibrary")
				if mediaLibraryResource == nil {
					mediaLibraryResource = Admin.NewResource(&MediaLibrary{})
				}
				config.RemoteDataResource = mediaLibraryResource
			}

			if _, ok := config.RemoteDataResource.Value.(MediaLibraryInterface); !ok {
				utils.ExitWithMsg("%v havn't implement MediaLibraryInterface, please fix that.", reflect.TypeOf(config.RemoteDataResource.Value))
			}

			if meta := config.RemoteDataResource.GetMeta("MediaOption"); meta == nil {
				config.RemoteDataResource.Meta(&admin.Meta{
					Name: "MediaOption",
					Type: "hidden",
					Setter: func(record interface{}, metaValue *resource.MetaValue, context *qor.Context) {
						if mediaLibrary, ok := record.(MediaLibraryInterface); ok {
							var mediaOption MediaOption
							if err := json.Unmarshal([]byte(utils.ToString(metaValue.Value)), &mediaOption); err == nil {
								mediaOption.FileName = ""
								mediaOption.URL = ""
								mediaOption.OriginalURL = ""
								mediaLibrary.ScanMediaOptions(mediaOption)
							}
						}
					},
					Valuer: func(record interface{}, context *qor.Context) interface{} {
						if mediaLibrary, ok := record.(MediaLibraryInterface); ok {
							if value, err := json.Marshal(mediaLibrary.GetMediaOption()); err == nil {
								return string(value)
							}
						}
						return ""
					},
				})
			}

			if meta := config.RemoteDataResource.GetMeta("SelectedType"); meta == nil {
				config.RemoteDataResource.Meta(&admin.Meta{
					Name: "SelectedType",
					Type: "hidden",
					Valuer: func(record interface{}, context *qor.Context) interface{} {
						if mediaLibrary, ok := record.(MediaLibraryInterface); ok {
							return mediaLibrary.GetSelectedType()
						}
						return ""
					},
				})
			}

			config.RemoteDataResource.AddProcessor(func(record interface{}, metaValues *resource.MetaValues, context *qor.Context) error {
				if mediaLibrary, ok := record.(MediaLibraryInterface); ok {
					var filename string
					var mediaOption MediaOption

					for _, metaValue := range metaValues.Values {
						if fileHeaders, ok := metaValue.Value.([]*multipart.FileHeader); ok {
							for _, fileHeader := range fileHeaders {
								filename = fileHeader.Filename
							}
						}
					}

					if metaValue := metaValues.Get("MediaOption"); metaValue != nil {
						mediaOptionStr := utils.ToString(metaValue.Value)
						json.Unmarshal([]byte(mediaOptionStr), &mediaOption)
					}

					if mediaOption.SelectedType == "video_link" {
						mediaLibrary.SetSelectedType("video_link")
					} else if filename != "" {
						if _, err := getImageFormat(filename); err == nil {
							mediaLibrary.SetSelectedType("image")
						} else if isVideoFormat(filename) {
							mediaLibrary.SetSelectedType("video")
						} else {
							mediaLibrary.SetSelectedType("file")
						}
					}
				}
				return nil
//.........这里部分代码省略.........

func (meta *Meta) Initialize() error {
	var (
		nestedField = strings.Contains(meta.FieldName, ".")
		field       = meta.FieldStruct
		hasColumn   = meta.FieldStruct != nil
	)

	var fieldType reflect.Type
	if hasColumn {
		fieldType = field.Struct.Type
		for fieldType.Kind() == reflect.Ptr {
			fieldType = fieldType.Elem()
		}
	}

	// Set Meta Valuer
	if meta.Valuer == nil {
		if hasColumn {
			meta.Valuer = func(value interface{}, context *qor.Context) interface{} {
				scope := context.GetDB().NewScope(value)
				fieldName := meta.FieldName
				if nestedField {
					fields := strings.Split(fieldName, ".")
					fieldName = fields[len(fields)-1]
				}

				if f, ok := scope.FieldByName(fieldName); ok {
					if f.Relationship != nil && f.Field.CanAddr() && !scope.PrimaryKeyZero() {
						context.GetDB().Model(value).Related(f.Field.Addr().Interface(), meta.FieldName)
					}

					return f.Field.Interface()
				}

				return ""
			}
		} else {
			utils.ExitWithMsg("Unsupported meta name %v for resource %v", meta.FieldName, reflect.TypeOf(meta.Resource.GetResource().Value))
		}
	}

	if meta.Setter == nil && hasColumn {
		if relationship := field.Relationship; relationship != nil {
			if relationship.Kind == "belongs_to" || relationship.Kind == "many_to_many" {
				meta.Setter = func(resource interface{}, metaValue *MetaValue, context *qor.Context) {
					scope := &gorm.Scope{Value: resource}
					reflectValue := reflect.Indirect(reflect.ValueOf(resource))
					field := reflectValue.FieldByName(meta.FieldName)

					if field.Kind() == reflect.Ptr {
						if field.IsNil() {
							field.Set(utils.NewValue(field.Type()).Elem())
						}

						for field.Kind() == reflect.Ptr {
							field = field.Elem()
						}
					}

					primaryKeys := utils.ToArray(metaValue.Value)
					// associations not changed for belongs to
					if relationship.Kind == "belongs_to" && len(relationship.ForeignFieldNames) == 1 {
						oldPrimaryKeys := utils.ToArray(reflectValue.FieldByName(relationship.ForeignFieldNames[0]).Interface())
						// if not changed
						if fmt.Sprint(primaryKeys) == fmt.Sprint(oldPrimaryKeys) {
							return
						}

						// if removed
						if len(primaryKeys) == 0 {
							field := reflectValue.FieldByName(relationship.ForeignFieldNames[0])
							field.Set(reflect.Zero(field.Type()))
						}
					}

					if len(primaryKeys) > 0 {
						context.GetDB().Where(primaryKeys).Find(field.Addr().Interface())
					}

					// Replace many 2 many relations
					if relationship.Kind == "many_to_many" {
						if !scope.PrimaryKeyZero() {
							context.GetDB().Model(resource).Association(meta.FieldName).Replace(field.Interface())
							field.Set(reflect.Zero(field.Type()))
						}
					}
				}
			}
		} else {
			meta.Setter = func(resource interface{}, metaValue *MetaValue, context *qor.Context) {
				if metaValue == nil {
					return
				}

				value := metaValue.Value
				fieldName := meta.FieldName
				if nestedField {
					fields := strings.Split(fieldName, ".")
					fieldName = fields[len(fields)-1]
				}
//.........这里部分代码省略.........

func (meta *Meta) updateMeta() {
	if meta.Name == "" {
		utils.ExitWithMsg("Meta should have name: %v", reflect.ValueOf(meta).Type())
	} else if meta.Alias == "" {
		meta.Alias = meta.Name
	}

	if meta.Label == "" {
		meta.Label = utils.HumanizeString(meta.Name)
	}

	var (
		scope       = &gorm.Scope{Value: meta.base.Value}
		nestedField = strings.Contains(meta.Alias, ".")
		field       *gorm.StructField
		hasColumn   bool
	)

	if nestedField {
		subModel, name := utils.ParseNestedField(reflect.ValueOf(meta.base.Value), meta.Alias)
		subScope := &gorm.Scope{Value: subModel.Interface()}
		field, hasColumn = getField(subScope.GetStructFields(), name)
	} else {
		if field, hasColumn = getField(scope.GetStructFields(), meta.Alias); hasColumn {
			meta.Alias = field.Name
			if field.IsNormal {
				meta.DBName = field.DBName
			}
		}
	}

	var fieldType reflect.Type
	if hasColumn {
		fieldType = field.Struct.Type
		for fieldType.Kind() == reflect.Ptr {
			fieldType = fieldType.Elem()
		}
	}

	// Set Meta Type
	if meta.Type == "" && hasColumn {
		if relationship := field.Relationship; relationship != nil {
			if relationship.Kind == "has_one" {
				meta.Type = "single_edit"
			} else if relationship.Kind == "has_many" {
				meta.Type = "collection_edit"
			} else if relationship.Kind == "belongs_to" {
				meta.Type = "select_one"
			} else if relationship.Kind == "many_to_many" {
				meta.Type = "select_many"
			}
		} else {
			switch fieldType.Kind().String() {
			case "string":
				if size, ok := utils.ParseTagOption(field.Tag.Get("sql"))["SIZE"]; ok {
					if i, _ := strconv.Atoi(size); i > 255 {
						meta.Type = "text"
					} else {
						meta.Type = "string"
					}
				} else if text, ok := utils.ParseTagOption(field.Tag.Get("sql"))["TYPE"]; ok && text == "text" {
					meta.Type = "text"
				} else {
					meta.Type = "string"
				}
			case "bool":
				meta.Type = "checkbox"
			default:
				if regexp.MustCompile(`^(.*)?(u)?(int)(\d+)?`).MatchString(fieldType.Kind().String()) {
					meta.Type = "number"
				} else if regexp.MustCompile(`^(.*)?(float)(\d+)?`).MatchString(fieldType.Kind().String()) {
					meta.Type = "float"
				} else if _, ok := reflect.New(fieldType).Interface().(*time.Time); ok {
					meta.Type = "datetime"
				} else if _, ok := reflect.New(fieldType).Interface().(media_library.MediaLibrary); ok {
					meta.Type = "file"
				}
			}
		}
	}

	// Set Meta Resource
	if meta.Resource == nil {
		if hasColumn && (field.Relationship != nil) {
			var result interface{}
			if fieldType.Kind().String() == "struct" {
				result = reflect.New(fieldType).Interface()
			} else if fieldType.Kind().String() == "slice" {
				refelectType := fieldType.Elem()
				for refelectType.Kind() == reflect.Ptr {
					refelectType = refelectType.Elem()
				}
				result = reflect.New(refelectType).Interface()
			}

			res := meta.base.GetAdmin().NewResource(result)
			res.compile()
			meta.Resource = res
		}
	}
//.........这里部分代码省略.........

// ConfigureQorResourceBeforeInitialize configure qor resource for qor admin
func (serialize *SerializableMeta) ConfigureQorResourceBeforeInitialize(res resource.Resourcer) {
	if res, ok := res.(*admin.Resource); ok {
		res.GetAdmin().RegisterViewPath("github.com/qor/serializable_meta/views")

		if _, ok := res.Value.(SerializableMetaInterface); ok {
			if res.GetMeta("Kind") == nil {
				res.Meta(&admin.Meta{
					Name: "Kind",
					Type: "hidden",
					Valuer: func(value interface{}, context *qor.Context) interface{} {
						defer func() {
							if r := recover(); r != nil {
								utils.ExitWithMsg("SerializableMeta: Can't Get Kind")
							}
						}()

						return value.(SerializableMetaInterface).GetSerializableArgumentKind()
					},
					Setter: func(value interface{}, metaValue *resource.MetaValue, context *qor.Context) {
						value.(SerializableMetaInterface).SetSerializableArgumentKind(utils.ToString(metaValue.Value))
					},
				})
			}

			if res.GetMeta("SerializableMeta") == nil {
				res.Meta(&admin.Meta{
					Name: "SerializableMeta",
					Type: "serializable_meta",
					Valuer: func(value interface{}, context *qor.Context) interface{} {
						if serializeArgument, ok := value.(SerializableMetaInterface); ok {
							return struct {
								Value    interface{}
								Resource *admin.Resource
							}{
								Value:    serializeArgument.GetSerializableArgument(serializeArgument),
								Resource: serializeArgument.GetSerializableArgumentResource(),
							}
						}
						return nil
					},
					FormattedValuer: func(value interface{}, context *qor.Context) interface{} {
						if serializeArgument, ok := value.(SerializableMetaInterface); ok {
							return serializeArgument.GetSerializableArgument(serializeArgument)
						}
						return nil
					},
					Setter: func(result interface{}, metaValue *resource.MetaValue, context *qor.Context) {
						if serializeArgument, ok := result.(SerializableMetaInterface); ok {
							if serializeArgumentResource := serializeArgument.GetSerializableArgumentResource(); serializeArgumentResource != nil {
								var clearUpRecord, fillUpRecord func(record interface{}, metaors []resource.Metaor, metaValues []*resource.MetaValue)
								// Keep original value, so if user don't have permission to update some fields, we won't lost the data
								value := serializeArgument.GetSerializableArgument(serializeArgument)

								for _, fc := range serializeArgumentResource.Validators {
									context.AddError(fc(value, metaValue.MetaValues, context))
								}

								// Clear all nested slices if has related form data
								clearUpRecord = func(record interface{}, metaors []resource.Metaor, metaValues []*resource.MetaValue) {
									for _, meta := range metaors {
										for _, metaValue := range metaValues {
											if meta.GetName() == metaValue.Name {
												if metaResource, ok := meta.GetResource().(*admin.Resource); ok && metaResource != nil && metaValue.MetaValues != nil {
													nestedFieldValue := reflect.Indirect(reflect.ValueOf(record)).FieldByName(meta.GetFieldName())
													if nestedFieldValue.Kind() == reflect.Struct {
														clearUpRecord(nestedFieldValue.Addr().Interface(), metaResource.GetMetas([]string{}), metaValue.MetaValues.Values)
													} else if nestedFieldValue.Kind() == reflect.Slice {
														nestedFieldValue.Set(reflect.Zero(nestedFieldValue.Type()))
													}
												}
											}
										}
									}
								}
								clearUpRecord(value, serializeArgumentResource.GetMetas([]string{}), metaValue.MetaValues.Values)

								fillUpRecord = func(record interface{}, metaors []resource.Metaor, metaValues []*resource.MetaValue) {
									for _, meta := range metaors {
										for _, metaValue := range metaValues {
											if meta.GetName() == metaValue.Name {
												if metaResource, ok := meta.GetResource().(*admin.Resource); ok && metaResource != nil && metaValue.MetaValues != nil {
													nestedFieldValue := reflect.Indirect(reflect.ValueOf(record)).FieldByName(meta.GetFieldName())

													if nestedFieldValue.Kind() == reflect.Struct {
														nestedValue := nestedFieldValue.Addr().Interface()
														for _, fc := range metaResource.Validators {
															context.AddError(fc(nestedValue, metaValue.MetaValues, context))
														}

														fillUpRecord(nestedValue, metaResource.GetMetas([]string{}), metaValue.MetaValues.Values)

														for _, fc := range metaResource.Processors {
															context.AddError(fc(nestedValue, metaValue.MetaValues, context))
														}
													}

													if nestedFieldValue.Kind() == reflect.Slice {
														nestedValue := reflect.New(nestedFieldValue.Type().Elem())

//.........这里部分代码省略.........