func init() {
ProductExchange = exchange.NewResource(&models.Product{}, exchange.Config{PrimaryField: "Code"})
ProductExchange.Meta(&exchange.Meta{Name: "Code"})
ProductExchange.Meta(&exchange.Meta{Name: "Name"})
ProductExchange.Meta(&exchange.Meta{Name: "Price"})
ProductExchange.AddValidator(func(record interface{}, metaValues *resource.MetaValues, context *qor.Context) error {
if utils.ToInt(metaValues.Get("Price").Value) < 100 {
return validations.NewError(record, "Price", "price can't less than 100")
}
return nil
})
}
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
}
}
// Set Meta Valuer
if meta.Valuer == nil {
if hasColumn {
meta.Valuer = func(value interface{}, context *qor.Context) interface{} {
scope := context.GetDB().NewScope(value)
alias := meta.Alias
if nestedField {
fields := strings.Split(alias, ".")
alias = fields[len(fields)-1]
}
if f, ok := scope.FieldByName(alias); ok {
if field.Relationship != nil {
if f.Field.CanAddr() && !scope.PrimaryKeyZero() {
context.GetDB().Model(value).Related(f.Field.Addr().Interface(), meta.Alias)
}
}
if f.Field.CanAddr() {
return f.Field.Addr().Interface()
} else {
return f.Field.Interface()
}
}
return ""
}
} else {
utils.ExitWithMsg("Unsupported meta name %v for resource %v", meta.Name, reflect.TypeOf(meta.base.Value))
}
}
scopeField, _ := scope.FieldByName(meta.Alias)
// 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)
}
}
if meta.Setter == nil && hasColumn {
if relationship := field.Relationship; relationship != nil {
if meta.Type == "select_one" || meta.Type == "select_many" {
meta.Setter = func(resource interface{}, metaValue *resource.MetaValue, context *qor.Context) {
scope := &gorm.Scope{Value: resource}
reflectValue := reflect.Indirect(reflect.ValueOf(resource))
field := reflectValue.FieldByName(meta.Alias)
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 equalAsString(primaryKeys, 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.Alias).Replace(field.Interface())
field.Set(reflect.Zero(field.Type()))
}
}
}
}
} else {
meta.Setter = func(resource interface{}, metaValue *resource.MetaValue, context *qor.Context) {
if metaValue == nil {
return
}
value := metaValue.Value
alias := meta.Alias
if nestedField {
fields := strings.Split(alias, ".")
alias = fields[len(fields)-1]
}
field := reflect.Indirect(reflect.ValueOf(resource)).FieldByName(alias)
if field.Kind() == reflect.Ptr {
if field.IsNil() {
field.Set(utils.NewValue(field.Type()).Elem())
}
for field.Kind() == reflect.Ptr {
field = field.Elem()
}
}
if field.IsValid() && field.CanAddr() {
switch field.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
field.SetInt(utils.ToInt(value))
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
field.SetUint(utils.ToUint(value))
case reflect.Float32, reflect.Float64:
field.SetFloat(utils.ToFloat(value))
case reflect.Bool:
// TODO: add test
if utils.ToString(value) == "true" {
field.SetBool(true)
} else {
field.SetBool(false)
}
default:
if scanner, ok := field.Addr().Interface().(sql.Scanner); ok {
if scanner.Scan(value) != nil {
scanner.Scan(utils.ToString(value))
}
} else if reflect.TypeOf("").ConvertibleTo(field.Type()) {
field.Set(reflect.ValueOf(utils.ToString(value)).Convert(field.Type()))
} else if reflect.TypeOf([]string{}).ConvertibleTo(field.Type()) {
field.Set(reflect.ValueOf(utils.ToArray(value)).Convert(field.Type()))
} else if rvalue := reflect.ValueOf(value); reflect.TypeOf(rvalue.Type()).ConvertibleTo(field.Type()) {
field.Set(rvalue.Convert(field.Type()))
} else if _, ok := field.Addr().Interface().(*time.Time); ok {
if str := utils.ToString(value); str != "" {
if newTime, err := now.Parse(str); err == nil {
field.Set(reflect.ValueOf(newTime))
}
}
} else {
var buf = bytes.NewBufferString("")
json.NewEncoder(buf).Encode(value)
if err := json.NewDecoder(strings.NewReader(buf.String())).Decode(field.Addr().Interface()); err != nil {
utils.ExitWithMsg("Can't set value %v to %v [meta %v]", reflect.ValueOf(value).Type(), field.Type(), meta)
}
}
}
}
}
}
}
if nestedField {
oldvalue := meta.Valuer
meta.Valuer = func(value interface{}, context *qor.Context) interface{} {
return oldvalue(utils.GetNestedModel(value, meta.Alias, context), context)
}
oldSetter := meta.Setter
meta.Setter = func(resource interface{}, metaValue *resource.MetaValue, context *qor.Context) {
oldSetter(utils.GetNestedModel(resource, meta.Alias, context), metaValue, context)
}
}
}
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]
}
field := reflect.Indirect(reflect.ValueOf(resource)).FieldByName(fieldName)
if field.Kind() == reflect.Ptr {
if field.IsNil() {
field.Set(utils.NewValue(field.Type()).Elem())
}
for field.Kind() == reflect.Ptr {
field = field.Elem()
}
}
if field.IsValid() && field.CanAddr() {
switch field.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
field.SetInt(utils.ToInt(value))
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
field.SetUint(utils.ToUint(value))
case reflect.Float32, reflect.Float64:
field.SetFloat(utils.ToFloat(value))
case reflect.Bool:
// TODO: add test
if utils.ToString(value) == "true" {
field.SetBool(true)
} else {
field.SetBool(false)
}
default:
if scanner, ok := field.Addr().Interface().(sql.Scanner); ok {
if scanner.Scan(value) != nil {
scanner.Scan(utils.ToString(value))
}
} else if reflect.TypeOf("").ConvertibleTo(field.Type()) {
field.Set(reflect.ValueOf(utils.ToString(value)).Convert(field.Type()))
} else if reflect.TypeOf([]string{}).ConvertibleTo(field.Type()) {
field.Set(reflect.ValueOf(utils.ToArray(value)).Convert(field.Type()))
} else if rvalue := reflect.ValueOf(value); reflect.TypeOf(rvalue.Type()).ConvertibleTo(field.Type()) {
field.Set(rvalue.Convert(field.Type()))
} else if _, ok := field.Addr().Interface().(*time.Time); ok {
if str := utils.ToString(value); str != "" {
if newTime, err := now.Parse(str); err == nil {
field.Set(reflect.ValueOf(newTime))
}
}
} else {
var buf = bytes.NewBufferString("")
json.NewEncoder(buf).Encode(value)
if err := json.NewDecoder(strings.NewReader(buf.String())).Decode(field.Addr().Interface()); err != nil {
utils.ExitWithMsg("Can't set value %v to %v [meta %v]", reflect.TypeOf(value), field.Type(), meta)
}
}
}
}
}
}
}
if nestedField {
oldvalue := meta.Valuer
meta.Valuer = func(value interface{}, context *qor.Context) interface{} {
return oldvalue(getNestedModel(value, meta.FieldName, context), context)
}
oldSetter := meta.Setter
meta.Setter = func(resource interface{}, metaValue *MetaValue, context *qor.Context) {
oldSetter(getNestedModel(resource, meta.FieldName, context), metaValue, context)
}
}
return nil
}