/* * Copyright (c) 2020 Alex aka mailoman * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * @author Alex aka mailoman * @copyright Copyright (c) 2020 Alex aka mailoman * @since 26.01.2020 * */ package main import ( "encoding/json" "log" "git.webz.asia/go-convert/fields" "github.com/satori/go.uuid" ) type FromStructBase struct { ID uuid.UUID `conv:"new,update"` Field1 string `conv:"new,update"` } type fromStruct struct { FromStructBase `conv:"new,update"` Field2 string `conv:"update"` } type toStruct struct { Id string Field1 string Field2 string Field3 string } func main() { fromDefault := fromStruct{ FromStructBase{uuid.FromStringOrNil("bb9f2a39-1dbd-4929-8e87-4863696d9cb3"), "field 1 value"}, "field 2 value", } toDefault := toStruct{ "old val 1", "old field 1 value", "old field 2 value", "old field 3 value", } log.Print("example 4.1 - new") from := fromDefault to := toDefault fields.Сonvert(from, "new", &to) fromB, _ := json.Marshal(from) toB, _ := json.Marshal(to) log.Printf("from %s => to %s", string(fromB), string(toB)) log.Print("example 4.2 - update") from = fromDefault to = toDefault fields.Сonvert(from, "update", &to) fromB, _ = json.Marshal(from) toB, _ = json.Marshal(to) log.Printf("from %s => to %s", string(fromB), string(toB)) }