Improvements to embedded struct support(uuid and similar tag names) and extra tests
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examples/example-4/main.go
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76
examples/example-4/main.go
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/*
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* Copyright (c) 2020 Alex aka mailoman <alex@webz.asia>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* @author Alex aka mailoman <alex@webz.asia>
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* @copyright Copyright (c) 2020 Alex aka mailoman <alex@webz.asia>
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* @since 26.01.2020
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*
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*/
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package main
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import (
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"encoding/json"
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"log"
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"github.com/go-convert/fields"
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"github.com/satori/go.uuid"
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)
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type FromStructBase struct {
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ID uuid.UUID `conv:"new,update"`
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Field1 string `conv:"new,update"`
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}
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type fromStruct struct {
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FromStructBase `conv:"new,update"`
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Field2 string `conv:"update"`
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}
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type toStruct struct {
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Id string
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Field1 string
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Field2 string
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Field3 string
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}
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func main() {
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fromDefault := fromStruct{
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FromStructBase{uuid.FromStringOrNil("bb9f2a39-1dbd-4929-8e87-4863696d9cb3"), "field 1 value"}, "field 2 value",
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}
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toDefault := toStruct{
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"old val 1", "old field 1 value", "old field 2 value", "old field 3 value",
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}
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log.Print("example 4.1 - new")
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from := fromDefault
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to := toDefault
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fields.Сonvert(from, "new", &to)
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fromB, _ := json.Marshal(from)
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toB, _ := json.Marshal(to)
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log.Printf("from %s => to %s", string(fromB), string(toB))
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log.Print("example 4.2 - update")
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from = fromDefault
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to = toDefault
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fields.Сonvert(from, "update", &to)
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fromB, _ = json.Marshal(from)
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toB, _ = json.Marshal(to)
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log.Printf("from %s => to %s", string(fromB), string(toB))
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}
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15
fields.go
15
fields.go
@ -25,6 +25,8 @@ import (
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"log"
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"reflect"
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"strings"
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"github.com/satori/go.uuid"
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)
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//Convert copies field values from one struct to another based on tags setup
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@ -70,13 +72,26 @@ func Сonvert(from interface{}, kind string, to interface{}) {
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if found {
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ft := vt.FieldByName(f.Name)
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if f.Name == strings.ToUpper(f.Name) && !ft.IsValid() {
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// was uppercase and not valid => to Capitalize first letter
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ft = vt.FieldByName(strings.Title(strings.ToLower(f.Name)))
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}
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if !ft.IsValid() && fv.Kind() == reflect.Struct {
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Сonvert(fv.Interface(), kind, to)
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} else {
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if ft.IsValid() {
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switch f.Type.String() {
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case "uuid.UUID":
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mv := fv.Interface().(uuid.UUID)
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ft.SetString(mv.String())
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default:
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ft.Set(fv)
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}
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}
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}
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}
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}
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}
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func readTag(f reflect.StructField, kind string) (bool, bool, bool) {
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@ -24,6 +24,7 @@ package fields_test
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import (
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"testing"
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"github.com/satori/go.uuid"
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"github.com/stretchr/testify/assert"
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"github.com/go-convert/fields"
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@ -51,6 +52,14 @@ type ToStruct struct {
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Field4 string
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}
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type ToStruct2 struct {
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Id string
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Field1 string
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Field2 string
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Field3 string
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Field4 string
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}
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type FromStructCustom struct {
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ID string `copy:"new,update"`
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Field1 string `copy:"new,update"`
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@ -64,6 +73,11 @@ type FromStructBase struct {
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Field1 string `conv:"new,update"`
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}
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type FromStructExtraBase struct {
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ID uuid.UUID `conv:"new,update"`
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Field1 string `conv:"new,update"`
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}
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type FromStructCombined struct {
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FromStructBase `conv:"new,update"`
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Field2 string `conv:"update"`
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@ -71,6 +85,13 @@ type FromStructCombined struct {
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Field4 string `conv:"category-1,omitempty"`
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}
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type FromStructCombinedExtra struct {
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FromStructExtraBase `conv:"new,update"`
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Field2 uuid.UUID `conv:"update"`
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Field3 string `conv:"update,omit"`
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Field4 string `conv:"category-1,omitempty"`
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}
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var (
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// testsNormal provides normal test cases
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testsNormal = []struct {
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@ -271,7 +292,7 @@ var (
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},
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}
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// testsCombinedNormal provides normal test cases with custom init config
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// testsCombinedNormal provides normal test cases with embedded structs
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testsCombinedNormal = []struct {
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from FromStructCombined
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kind string
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@ -331,6 +352,67 @@ var (
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},
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},
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}
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// testsCombinedExtra provides normal test cases with embedded structs with more features
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testsCombinedExtra = []struct {
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from FromStructCombinedExtra
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kind string
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to ToStruct2
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expectedTo ToStruct2
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}{
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// case 4.1
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{
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FromStructCombinedExtra{
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FromStructExtraBase{uuid.FromStringOrNil("bb9f2a39-1dbd-4929-8e87-4863696d9cb3"), "field 1 value"}, uuid.FromStringOrNil("d039089d-27f5-438b-8b70-90eb3df0d79b"), "omitting", "",
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},
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"new",
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ToStruct2{
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"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "",
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},
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ToStruct2{
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"bb9f2a39-1dbd-4929-8e87-4863696d9cb3", "field 1 value", "old field 2 value", "old field 3 value", "",
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},
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},
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// case 4.2
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{
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FromStructCombinedExtra{
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FromStructExtraBase{uuid.FromStringOrNil("bb9f2a39-1dbd-4929-8e87-4863696d9cb3"), "field 1 value"}, uuid.FromStringOrNil("d039089d-27f5-438b-8b70-90eb3df0d79b"), "omitting", "",
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},
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"update",
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ToStruct2{
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"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "",
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},
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ToStruct2{
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"bb9f2a39-1dbd-4929-8e87-4863696d9cb3", "field 1 value", "d039089d-27f5-438b-8b70-90eb3df0d79b", "old field 3 value", "",
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},
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},
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// case 4.3.1
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{
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FromStructCombinedExtra{
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FromStructExtraBase{uuid.FromStringOrNil("bb9f2a39-1dbd-4929-8e87-4863696d9cb3"), "field 1 value"}, uuid.FromStringOrNil("d039089d-27f5-438b-8b70-90eb3df0d79b"), "omitting", "",
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},
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"category-1",
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ToStruct2{
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"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "old field 4 value",
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},
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ToStruct2{
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"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "old field 4 value",
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},
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},
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// case 4.3.2
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{
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FromStructCombinedExtra{
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FromStructExtraBase{uuid.FromStringOrNil("bb9f2a39-1dbd-4929-8e87-4863696d9cb3"), "field 1 value"}, uuid.FromStringOrNil("d039089d-27f5-438b-8b70-90eb3df0d79b"), "omitting", "not empty",
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},
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"category-1",
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ToStruct2{
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"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "old field 4 value",
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},
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ToStruct2{
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"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "not empty",
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},
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},
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}
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)
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func TestConvert_Normal(t *testing.T) {
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@ -444,3 +526,17 @@ func TestConvert_CombinedNormal(t *testing.T) {
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assert.Equal(t, test.expectedTo, *to)
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}
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}
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func TestConvert_CombinedExtra(t *testing.T) {
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fields.SetDefaults()
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for _, test := range testsCombinedExtra {
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to := &ToStruct2{}
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*to = test.to
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fields.Сonvert(test.from, test.kind, to)
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assert.NotEmpty(t, *to)
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assert.Equal(t, test.expectedTo, *to)
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}
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}
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5
go.mod
5
go.mod
@ -2,4 +2,7 @@ module github.com/go-convert/fields
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go 1.13
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require github.com/stretchr/testify v1.4.0
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require (
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github.com/satori/go.uuid v1.2.0
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github.com/stretchr/testify v1.4.0
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)
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2
go.sum
2
go.sum
@ -2,6 +2,8 @@ github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8
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github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
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github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
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github.com/satori/go.uuid v1.2.0 h1:0uYX9dsZ2yD7q2RtLRtPSdGDWzjeM3TbMJP9utgA0ww=
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github.com/satori/go.uuid v1.2.0/go.mod h1:dA0hQrYB0VpLJoorglMZABFdXlWrHn1NEOzdhQKdks0=
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github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
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github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
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github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
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