Utility function for marshal json with pattern.
You can filter nested field with path using . separator (e.g. user.address will apply pattern to {"user" : { "address" : {...} } }.
NOTE: use "." as path pattern for root object.
NOTE: you can use "JsonerIndent" method to generate json with indent.
import "github.com/gomig/jsoner"
type Book struct {
Title string
ISBN string `json:"isbn"`
}
type Author struct {
Name string `json:"name"`
Family string `json:"family"`
Age int `json:"age,string,omitempty"`
IsMariage bool `json:",string"`
Books []Book `json:"author_books"`
Skills []string
// ignored fields
PrivateField string `json:"-"`
ignored string
}
john := Author{
Name: "John",
Family: "Doe",
Age: 0,
IsMariage: false,
Books: []Book{
{Title: "Basics Of C", ISBN: "12345"},
{Title: "Golang", ISBN: "88888"},
},
Skills: []string{"Web dev", "System programming", "IOT"},
PrivateField: "Some private information",
ignored: "i'm ignored"
}
options := map[string]jsoner.JsonerOption{
".": {Ignore: []string{"family"}}, // ignore family field from root struct
"author_books": {Only: []string{"title"}}, // only marshal title field of author books
}
bytes, _ := jsoner.Jsoner(john, options)
fmt.Println(string(bytes))
/*
{
"author_books": [
{
"Title": "Basics Of C"
},
{
"Title": "Golang"
}
],
"IsMariage": "false",
"name": "John",
"Skills": [
"Web dev",
"System programming",
"IOT"
]
}
*/