fields/examples/example-2/main.go

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/*
* Copyright (c) 2020 Alex aka mailoman <alex@webz.asia>
*
* 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 <alex@webz.asia>
* @copyright Copyright (c) 2020 Alex aka mailoman <alex@webz.asia>
* @since 14.01.2020
*
*/
package main
import (
"encoding/json"
"log"
"git.webz.asia/go-convert/fields"
)
type fromStructCustom struct {
ID string `copy:"new,update"`
Field1 string `copy:"new,update"`
Field2 string `copy:"update"`
Field3 string `copy:"category-1,ignore"`
Field4 string `copy:"category-1,noempty"`
}
type toStruct struct {
ID string
Field1 string
Field2 string
Field3 string
Field4 string
}
func main() {
fields.SetTagName("copy")
fields.SetOmitTagName("ignore")
fields.SetOmitEmptyTagName("noempty")
log.Print("example 2.1 - new")
from := fromStructCustom{
"1", "field 1 value", "field 2 value", "omitting", "not empty",
}
to := toStruct{
"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "old field 4 value",
}
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 2.2.1 - category-1")
from = fromStructCustom{
"1", "field 1 value", "field 2 value", "omitting", "not empty",
}
to = toStruct{
"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "old field 4 value",
}
fields.Сonvert(from, "category-1", &to)
fromB, _ = json.Marshal(from)
toB, _ = json.Marshal(to)
log.Printf("from %s => to %s", string(fromB), string(toB))
log.Print("example 2.2.2 - category-1")
from = fromStructCustom{
"1", "field 1 value", "field 2 value", "omitting", "",
}
to = toStruct{
"old val 1", "old field 1 value", "old field 2 value", "old field 3 value", "old field 4 value",
}
fields.Сonvert(from, "category-1", &to)
fromB, _ = json.Marshal(from)
toB, _ = json.Marshal(to)
log.Printf("from %s => to %s", string(fromB), string(toB))
}