forked from mirror/gorm
91 lines
2.3 KiB
Go
91 lines
2.3 KiB
Go
package gorm
|
|
|
|
import (
|
|
"database/sql"
|
|
"errors"
|
|
"fmt"
|
|
"reflect"
|
|
)
|
|
|
|
type Field struct {
|
|
*StructField
|
|
IsBlank bool
|
|
Field reflect.Value
|
|
}
|
|
|
|
func (field *Field) Set(value interface{}) (err error) {
|
|
if !field.Field.IsValid() {
|
|
return errors.New("field value not valid")
|
|
}
|
|
|
|
if !field.Field.CanAddr() {
|
|
return errors.New("unaddressable value")
|
|
}
|
|
|
|
reflectValue, ok := value.(reflect.Value)
|
|
if !ok {
|
|
reflectValue = reflect.ValueOf(value)
|
|
}
|
|
|
|
fieldValue := field.Field
|
|
if reflectValue.IsValid() {
|
|
if reflectValue.Type().ConvertibleTo(fieldValue.Type()) {
|
|
fieldValue.Set(reflectValue.Convert(fieldValue.Type()))
|
|
} else {
|
|
if fieldValue.Kind() == reflect.Ptr {
|
|
if fieldValue.IsNil() {
|
|
fieldValue.Set(reflect.New(field.Struct.Type.Elem()))
|
|
}
|
|
fieldValue = fieldValue.Elem()
|
|
}
|
|
|
|
if reflectValue.Type().ConvertibleTo(fieldValue.Type()) {
|
|
fieldValue.Set(reflectValue.Convert(fieldValue.Type()))
|
|
} else if scanner, ok := fieldValue.Addr().Interface().(sql.Scanner); ok {
|
|
err = scanner.Scan(reflectValue.Interface())
|
|
} else {
|
|
err = fmt.Errorf("could not convert argument of field %s from %s to %s", field.Name, reflectValue.Type(), fieldValue.Type())
|
|
}
|
|
}
|
|
} else {
|
|
field.Field.Set(reflect.Zero(field.Field.Type()))
|
|
}
|
|
|
|
field.IsBlank = isBlank(field.Field)
|
|
return nil
|
|
}
|
|
|
|
// Fields get value's fields
|
|
func (scope *Scope) Fields() map[string]*Field {
|
|
if scope.fields == nil {
|
|
fields := map[string]*Field{}
|
|
modelStruct := scope.GetModelStruct()
|
|
|
|
indirectValue := scope.IndirectValue()
|
|
isStruct := indirectValue.Kind() == reflect.Struct
|
|
for _, structField := range modelStruct.StructFields {
|
|
if field, ok := fields[structField.DBName]; !ok || field.IsIgnored {
|
|
if isStruct {
|
|
fields[structField.DBName] = getField(indirectValue, structField)
|
|
} else {
|
|
fields[structField.DBName] = &Field{StructField: structField, IsBlank: true}
|
|
}
|
|
}
|
|
}
|
|
|
|
scope.fields = fields
|
|
return fields
|
|
}
|
|
return scope.fields
|
|
}
|
|
|
|
func getField(indirectValue reflect.Value, structField *StructField) *Field {
|
|
field := &Field{StructField: structField}
|
|
for _, name := range structField.Names {
|
|
indirectValue = reflect.Indirect(indirectValue).FieldByName(name)
|
|
}
|
|
field.Field = indirectValue
|
|
field.IsBlank = isBlank(indirectValue)
|
|
return field
|
|
}
|