472c70caa4
Scan interface only accept int64, float64, bool, []byte, string, time.Time or nil. When do scan, it's better to check whether the type support valuer interface and do convert.
67 lines
1.5 KiB
Go
67 lines
1.5 KiB
Go
package gorm
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import (
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"database/sql"
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"database/sql/driver"
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"errors"
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"fmt"
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"reflect"
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)
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// Field model field definition
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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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// Set set a value to the field
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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 ErrUnaddressable
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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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v := reflectValue.Interface()
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if valuer, ok := v.(driver.Valuer); ok {
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if v, err = valuer.Value(); err == nil {
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err = scanner.Scan(v)
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}
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} else {
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err = scanner.Scan(v)
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}
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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 err
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}
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