A go package to merge structs of the same type, filling zero values with non zero values from another.
Merger is useful if you want to provide a default settings struct for something, or if you are working with database results and want to 'update' just some fields from a struct
Merge(&dst, src)
Being &dst a pointer to the destination struct and src the origin struct
Example
package main
import (
"fmt"
"github.com/worg/merger"
)
type Person struct {
ID int
Name string
Address string
}
var (
defaultPerson = Person{
Name: `Homer`,
Address: `742 Evergreen Terrace`,
}
)
func main() {
p := Person{Name: `John`}
if err := merger.Merge(&p, defaultPerson); err != nil {
// handle err
}
fmt.Printf("p is: %+v", p)
// prints : p is {Id: 0, Name: John, Address: 742 Evergreen Terrace}
}
Mergo won't merge non zero nor unexported fields , that is it will respect any value already present in dst.
Copyright (c) 2014 Hiram Jerónimo Pérez worg{at}linuxmail[dot]org
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.