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