mirror of https://github.com/go-gorm/gorm.git
Refactor GetModelStruct
This commit is contained in:
Jinzhu
parent
4e45e6dc2d
commit
6a5a2dbc55
4
field.go
4
field.go
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@ -75,9 +75,7 @@ func (scope *Scope) Fields() map[string]*Field {
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}
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}
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if modelStruct.cached {
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scope.fields = fields
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}
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scope.fields = fields
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return fields
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}
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return scope.fields
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351
model_struct.go
351
model_struct.go
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@ -45,7 +45,6 @@ type ModelStruct struct {
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StructFields []*StructField
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ModelType reflect.Type
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defaultTableName string
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cached bool
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}
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func (s *ModelStruct) TableName(db *DB) string {
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@ -96,6 +95,15 @@ type Relationship struct {
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JoinTableHandler JoinTableHandlerInterface
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}
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func getForeignField(column string, fields []*StructField) *StructField {
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for _, field := range fields {
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if field.Name == column || field.DBName == ToDBName(column) {
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return field
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}
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}
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return nil
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}
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func (scope *Scope) GetModelStruct() *ModelStruct {
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var modelStruct ModelStruct
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// Scope value can't be nil
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@ -132,7 +140,6 @@ func (scope *Scope) GetModelStruct() *ModelStruct {
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}
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// Get all fields
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fields := []*StructField{}
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for i := 0; i < reflectType.NumField(); i++ {
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if fieldStruct := reflectType.Field(i); ast.IsExported(fieldStruct.Name) {
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field := &StructField{
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@ -145,189 +152,155 @@ func (scope *Scope) GetModelStruct() *ModelStruct {
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if fieldStruct.Tag.Get("sql") == "-" {
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field.IsIgnored = true
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}
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if _, ok := field.TagSettings["PRIMARY_KEY"]; ok {
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field.IsPrimaryKey = true
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modelStruct.PrimaryFields = append(modelStruct.PrimaryFields, field)
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}
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if _, ok := field.TagSettings["DEFAULT"]; ok {
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field.HasDefaultValue = true
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}
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if value, ok := field.TagSettings["COLUMN"]; ok {
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field.DBName = value
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} else {
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field.DBName = ToDBName(fieldStruct.Name)
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}
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fields = append(fields, field)
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}
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}
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var finished = make(chan bool)
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go func(finished chan bool) {
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for _, field := range fields {
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if !field.IsIgnored {
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fieldStruct := field.Struct
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indirectType := fieldStruct.Type
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if indirectType.Kind() == reflect.Ptr {
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indirectType = indirectType.Elem()
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if _, ok := field.TagSettings["PRIMARY_KEY"]; ok {
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field.IsPrimaryKey = true
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modelStruct.PrimaryFields = append(modelStruct.PrimaryFields, field)
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}
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if _, isScanner := reflect.New(indirectType).Interface().(sql.Scanner); isScanner {
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if _, ok := field.TagSettings["DEFAULT"]; ok {
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field.HasDefaultValue = true
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}
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fieldValue := reflect.New(fieldStruct.Type).Interface()
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if _, isScanner := fieldValue.(sql.Scanner); isScanner {
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// is scanner
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field.IsScanner, field.IsNormal = true, true
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}
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if _, isTime := reflect.New(indirectType).Interface().(*time.Time); isTime {
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} else if _, isTime := fieldValue.(*time.Time); isTime {
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// is time
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field.IsNormal = true
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}
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if !field.IsNormal {
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toScope := scope.New(reflect.New(fieldStruct.Type).Interface())
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getForeignField := func(column string, fields []*StructField) *StructField {
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for _, field := range fields {
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if field.Name == column || field.DBName == ToDBName(column) {
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return field
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}
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} else if _, ok := field.TagSettings["EMBEDDED"]; ok || fieldStruct.Anonymous {
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// embedded struct
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for _, subField := range scope.New(fieldValue).GetStructFields() {
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subField = subField.clone()
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subField.Names = append([]string{fieldStruct.Name}, subField.Names...)
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if subField.IsPrimaryKey {
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modelStruct.PrimaryFields = append(modelStruct.PrimaryFields, subField)
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}
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return nil
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modelStruct.StructFields = append(modelStruct.StructFields, subField)
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}
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continue
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} else {
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indirectType := fieldStruct.Type
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for indirectType.Kind() == reflect.Ptr {
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indirectType = indirectType.Elem()
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}
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var relationship = &Relationship{}
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if polymorphic := field.TagSettings["POLYMORPHIC"]; polymorphic != "" {
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if polymorphicField := getForeignField(polymorphic+"Id", toScope.GetStructFields()); polymorphicField != nil {
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if polymorphicType := getForeignField(polymorphic+"Type", toScope.GetStructFields()); polymorphicType != nil {
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relationship.ForeignFieldNames = []string{polymorphicField.Name}
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relationship.ForeignDBNames = []string{polymorphicField.DBName}
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relationship.AssociationForeignFieldNames = []string{scope.PrimaryField().Name}
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relationship.AssociationForeignDBNames = []string{scope.PrimaryField().DBName}
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relationship.PolymorphicType = polymorphicType.Name
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relationship.PolymorphicDBName = polymorphicType.DBName
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polymorphicType.IsForeignKey = true
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polymorphicField.IsForeignKey = true
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}
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}
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}
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var foreignKeys []string
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if foreignKey, ok := field.TagSettings["FOREIGNKEY"]; ok {
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foreignKeys = append(foreignKeys, foreignKey)
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}
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switch indirectType.Kind() {
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case reflect.Slice:
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elemType := indirectType.Elem()
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if elemType.Kind() == reflect.Ptr {
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elemType = elemType.Elem()
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}
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defer func(field *StructField) {
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var (
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relationship = &Relationship{}
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toScope = scope.New(reflect.New(field.Struct.Type).Interface())
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foreignKeys = strings.Split(field.TagSettings["FOREIGNKEY"], ";")
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associationForeignKeys = strings.Split(field.TagSettings["ASSOCIATIONFOREIGNKEY"], ";")
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elemType = field.Struct.Type
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)
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if elemType.Kind() == reflect.Struct {
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if many2many := field.TagSettings["MANY2MANY"]; many2many != "" {
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relationship.Kind = "many_to_many"
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for elemType.Kind() == reflect.Slice || elemType.Kind() == reflect.Ptr {
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elemType = elemType.Elem()
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}
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// foreign keys
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if len(foreignKeys) == 0 {
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for _, field := range scope.PrimaryFields() {
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foreignKeys = append(foreignKeys, field.DBName)
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}
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}
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if elemType.Kind() == reflect.Struct {
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if many2many := field.TagSettings["MANY2MANY"]; many2many != "" {
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relationship.Kind = "many_to_many"
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for _, foreignKey := range foreignKeys {
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if field, ok := scope.FieldByName(foreignKey); ok {
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relationship.ForeignFieldNames = append(relationship.ForeignFieldNames, field.DBName)
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joinTableDBName := ToDBName(reflectType.Name()) + "_" + field.DBName
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relationship.ForeignDBNames = append(relationship.ForeignDBNames, joinTableDBName)
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}
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}
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// association foreign keys
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var associationForeignKeys []string
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if foreignKey := field.TagSettings["ASSOCIATIONFOREIGNKEY"]; foreignKey != "" {
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associationForeignKeys = []string{foreignKey}
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} else {
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for _, field := range toScope.PrimaryFields() {
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associationForeignKeys = append(associationForeignKeys, field.DBName)
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}
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}
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for _, name := range associationForeignKeys {
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if field, ok := toScope.FieldByName(name); ok {
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relationship.AssociationForeignFieldNames = append(relationship.AssociationForeignFieldNames, field.DBName)
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joinTableDBName := ToDBName(elemType.Name()) + "_" + field.DBName
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relationship.AssociationForeignDBNames = append(relationship.AssociationForeignDBNames, joinTableDBName)
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}
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}
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joinTableHandler := JoinTableHandler{}
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joinTableHandler.Setup(relationship, many2many, reflectType, elemType)
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relationship.JoinTableHandler = &joinTableHandler
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field.Relationship = relationship
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} else {
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relationship.Kind = "has_many"
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if len(foreignKeys) == 0 {
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for _, field := range scope.PrimaryFields() {
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if foreignField := getForeignField(reflectType.Name()+field.Name, toScope.GetStructFields()); foreignField != nil {
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relationship.AssociationForeignFieldNames = append(relationship.AssociationForeignFieldNames, field.Name)
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relationship.AssociationForeignDBNames = append(relationship.AssociationForeignDBNames, field.DBName)
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relationship.ForeignFieldNames = append(relationship.ForeignFieldNames, foreignField.Name)
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relationship.ForeignDBNames = append(relationship.ForeignDBNames, foreignField.DBName)
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foreignField.IsForeignKey = true
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// if no foreign keys
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if len(foreignKeys) == 0 {
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for _, field := range scope.PrimaryFields() { // FIXME
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foreignKeys = append(foreignKeys, field.DBName)
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}
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}
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for _, foreignKey := range foreignKeys {
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if field, ok := scope.FieldByName(foreignKey); ok { // FIXME
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// source foreign keys (db names)
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relationship.ForeignFieldNames = append(relationship.ForeignFieldNames, field.DBName)
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// join table foreign keys for source
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joinTableDBName := ToDBName(reflectType.Name()) + "_" + field.DBName
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relationship.ForeignDBNames = append(relationship.ForeignDBNames, joinTableDBName)
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}
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}
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// if no association foreign keys
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if len(associationForeignKeys) == 0 {
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for _, field := range toScope.PrimaryFields() {
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associationForeignKeys = append(associationForeignKeys, field.DBName)
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}
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}
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for _, name := range associationForeignKeys {
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if field, ok := toScope.FieldByName(name); ok {
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// association foreign keys (db names)
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relationship.AssociationForeignFieldNames = append(relationship.AssociationForeignFieldNames, field.DBName)
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// join table foreign keys for association
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joinTableDBName := ToDBName(elemType.Name()) + "_" + field.DBName
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relationship.AssociationForeignDBNames = append(relationship.AssociationForeignDBNames, joinTableDBName)
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}
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}
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joinTableHandler := JoinTableHandler{}
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joinTableHandler.Setup(relationship, many2many, reflectType, elemType)
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relationship.JoinTableHandler = &joinTableHandler
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field.Relationship = relationship
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} else {
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relationship.Kind = "has_many"
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// if no foreign keys
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if len(foreignKeys) == 0 {
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for _, field := range scope.PrimaryFields() { // FIXME
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foreignKeys = append(foreignKeys, reflectType.Name()+field.Name)
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}
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}
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for _, foreignKey := range foreignKeys {
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if foreignField := getForeignField(foreignKey, toScope.GetStructFields()); foreignField != nil {
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relationship.AssociationForeignFieldNames = append(relationship.AssociationForeignFieldNames, scope.PrimaryField().Name)
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relationship.AssociationForeignDBNames = append(relationship.AssociationForeignDBNames, scope.PrimaryField().DBName)
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// source foreign keys
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foreignField.IsForeignKey = true
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relationship.AssociationForeignFieldNames = append(relationship.AssociationForeignFieldNames, field.Name)
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relationship.AssociationForeignDBNames = append(relationship.AssociationForeignDBNames, field.DBName)
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// association foreign keys
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relationship.ForeignFieldNames = append(relationship.ForeignFieldNames, foreignField.Name)
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relationship.ForeignDBNames = append(relationship.ForeignDBNames, foreignField.DBName)
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foreignField.IsForeignKey = true
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}
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}
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}
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if len(relationship.ForeignFieldNames) != 0 {
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field.Relationship = relationship
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}
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}
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} else {
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field.IsNormal = true
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}
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case reflect.Struct:
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if _, ok := field.TagSettings["EMBEDDED"]; ok || fieldStruct.Anonymous {
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for _, toField := range toScope.GetStructFields() {
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toField = toField.clone()
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toField.Names = append([]string{fieldStruct.Name}, toField.Names...)
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modelStruct.StructFields = append(modelStruct.StructFields, toField)
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if toField.IsPrimaryKey {
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modelStruct.PrimaryFields = append(modelStruct.PrimaryFields, toField)
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}
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}
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continue
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} else {
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if len(foreignKeys) == 0 {
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for _, f := range scope.PrimaryFields() {
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if foreignField := getForeignField(modelStruct.ModelType.Name()+f.Name, toScope.GetStructFields()); foreignField != nil {
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relationship.AssociationForeignFieldNames = append(relationship.AssociationForeignFieldNames, f.Name)
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relationship.AssociationForeignDBNames = append(relationship.AssociationForeignDBNames, f.DBName)
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relationship.ForeignFieldNames = append(relationship.ForeignFieldNames, foreignField.Name)
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relationship.ForeignDBNames = append(relationship.ForeignDBNames, foreignField.DBName)
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foreignField.IsForeignKey = true
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if len(relationship.ForeignFieldNames) != 0 {
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field.Relationship = relationship
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}
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}
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} else {
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for _, foreignKey := range foreignKeys {
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if foreignField := getForeignField(foreignKey, toScope.GetStructFields()); foreignField != nil {
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relationship.AssociationForeignFieldNames = append(relationship.AssociationForeignFieldNames, scope.PrimaryField().Name)
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relationship.AssociationForeignDBNames = append(relationship.AssociationForeignDBNames, scope.PrimaryField().DBName)
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relationship.ForeignFieldNames = append(relationship.ForeignFieldNames, foreignField.Name)
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relationship.ForeignDBNames = append(relationship.ForeignDBNames, foreignField.DBName)
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foreignField.IsForeignKey = true
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}
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field.IsNormal = true
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}
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}(field)
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case reflect.Struct:
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defer func(field *StructField) {
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var (
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relationship = &Relationship{}
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toScope = scope.New(reflect.New(field.Struct.Type).Interface())
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tagForeignKeys = strings.Split(field.TagSettings["FOREIGNKEY"], ";")
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foreignKeys = tagForeignKeys
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)
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if len(tagForeignKeys) == 0 {
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for _, primaryField := range scope.PrimaryFields() {
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foreignKeys = append(foreignKeys, modelStruct.ModelType.Name()+primaryField.Name)
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}
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}
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// if has one
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for _, foreignKey := range foreignKeys {
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if foreignField := getForeignField(foreignKey, toScope.GetStructFields()); foreignField != nil {
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foreignField.IsForeignKey = true
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// source foreign keys
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scopeField := getForeignField(foreignKey, modelStruct.StructFields)
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relationship.AssociationForeignFieldNames = append(relationship.AssociationForeignFieldNames, scopeField.Name)
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relationship.AssociationForeignDBNames = append(relationship.AssociationForeignDBNames, scopeField.DBName)
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// association foreign keys
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relationship.ForeignFieldNames = append(relationship.ForeignFieldNames, foreignField.Name)
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relationship.ForeignDBNames = append(relationship.ForeignDBNames, foreignField.DBName)
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}
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}
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@ -335,25 +308,23 @@ func (scope *Scope) GetModelStruct() *ModelStruct {
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relationship.Kind = "has_one"
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field.Relationship = relationship
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} else {
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foreignKeys = tagForeignKeys
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if len(foreignKeys) == 0 {
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for _, f := range toScope.PrimaryFields() {
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if foreignField := getForeignField(field.Name+f.Name, fields); foreignField != nil {
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relationship.AssociationForeignFieldNames = append(relationship.AssociationForeignFieldNames, f.Name)
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relationship.AssociationForeignDBNames = append(relationship.AssociationForeignDBNames, f.DBName)
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relationship.ForeignFieldNames = append(relationship.ForeignFieldNames, foreignField.Name)
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relationship.ForeignDBNames = append(relationship.ForeignDBNames, foreignField.DBName)
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foreignField.IsForeignKey = true
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}
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foreignKeys = append(foreignKeys, field.Name+f.Name)
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}
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} else {
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for _, foreignKey := range foreignKeys {
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if foreignField := getForeignField(foreignKey, fields); foreignField != nil {
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relationship.AssociationForeignFieldNames = append(relationship.AssociationForeignFieldNames, toScope.PrimaryField().Name)
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relationship.AssociationForeignDBNames = append(relationship.AssociationForeignDBNames, toScope.PrimaryField().DBName)
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relationship.ForeignFieldNames = append(relationship.ForeignFieldNames, foreignField.Name)
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relationship.ForeignDBNames = append(relationship.ForeignDBNames, foreignField.DBName)
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foreignField.IsForeignKey = true
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}
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}
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for _, foreignKey := range foreignKeys {
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if foreignField := getForeignField(foreignKey, modelStruct.StructFields); foreignField != nil {
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// association foreign keys
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relationship.AssociationForeignFieldNames = append(relationship.AssociationForeignFieldNames, toScope.PrimaryField().Name)
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relationship.AssociationForeignDBNames = append(relationship.AssociationForeignDBNames, toScope.PrimaryField().DBName)
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// source foreign keys
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relationship.ForeignFieldNames = append(relationship.ForeignFieldNames, foreignField.Name)
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relationship.ForeignDBNames = append(relationship.ForeignDBNames, foreignField.DBName)
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foreignField.IsForeignKey = true
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}
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}
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@ -362,29 +333,33 @@ func (scope *Scope) GetModelStruct() *ModelStruct {
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field.Relationship = relationship
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}
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}
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}
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}(field)
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default:
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field.IsNormal = true
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}
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}
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if field.IsNormal {
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if len(modelStruct.PrimaryFields) == 0 && field.DBName == "id" {
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field.IsPrimaryKey = true
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modelStruct.PrimaryFields = append(modelStruct.PrimaryFields, field)
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}
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}
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}
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// Even it is ignored, also possible to decode db value into the field
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if value, ok := field.TagSettings["COLUMN"]; ok {
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field.DBName = value
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} else {
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field.DBName = ToDBName(fieldStruct.Name)
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}
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modelStruct.StructFields = append(modelStruct.StructFields, field)
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}
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finished <- true
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}(finished)
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}
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if len(modelStruct.PrimaryFields) == 0 {
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if field := getForeignField("id", modelStruct.StructFields); field != nil {
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field.IsPrimaryKey = true
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modelStruct.PrimaryFields = append(modelStruct.PrimaryFields, field)
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}
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}
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modelStructsMap.Set(reflectType, &modelStruct)
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<-finished
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modelStruct.cached = true
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return &modelStruct
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}
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