crud read function

crud_read_function.go

// Read read data
func (crud *CRUD) Read(data interface{}) (interface{}, error) {
	rv := reflect.ValueOf(data)
	rv = reflect.Indirect(rv)
	pk := rv.Field(crud.Config.pk.index)
	if !pk.CanInterface() {
		return nil, errors.Errorf("table %s with primary key has wrong interface type",
			crud.Config.TableName, crud.Config.pk.index)
	}
	rows, err := crud.Config.DB.Queryx(crud.Config.sqlCRUDRead, pk.Interface())
	if err != nil {
		return nil, errors.Wrap(err, "error crud read")
	}
	defer rows.Close()
	if rows.Next() {
		obj := crud.Config.Object.Get()
		err = rows.StructScan(obj)
		if err != nil {
			return nil, errors.Wrap(err, "error crud scan")
		}
		re, err := buildListOfFields(obj, crud.Config.selectedFields)
		if err != nil {
			return nil, errors.Wrap(err, "error build list of fields")
		}
		return re, nil
	}
	return nil, nil
}