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README.md
jsonx
It's modified version of encoding/json
which enables extra map field (with jsonx:"true"
tag) to catch all other fields not declared in the struct.
jsonx
is a code name for internal use
and not related to JSONx.
Example (Run on playgroud)
package main
import (
"encoding/json"
"fmt"
"github.com/yaegashi/msgraph.go/jsonx"
)
type Extra struct {
X string
Y int
Extra map[string]interface{} `json:"-" jsonx:"true"`
}
func main() {
var x1, x2 Extra
b := []byte(`{"X":"123","Y":123,"A":"123","B":123}`)
fmt.Printf("\nUnmarshal input: %s\n", string(b))
json.Unmarshal(b, &x1)
fmt.Printf(" json.Unmarshal: %#v\n", x1)
jsonx.Unmarshal(b, &x2)
fmt.Printf("jsonx.Unmarshal: %#v\n", x2)
x := Extra{X: "456", Y: 456, Extra: map[string]interface{}{"A": "456", "B": 456}}
fmt.Printf("\nMarshal input: %#v\n", x)
b1, _ := json.Marshal(x)
fmt.Printf(" json.Marshal: %s\n", string(b1))
b2, _ := jsonx.Marshal(x)
fmt.Printf("jsonx.Marshal: %s\n", string(b2))
}
Result
Unmarshal input: {"X":"123","Y":123,"A":"123","B":123}
json.Unmarshal: main.Extra{X:"123", Y:123, Extra:map[string]interface {}(nil)}
jsonx.Unmarshal: main.Extra{X:"123", Y:123, Extra:map[string]interface {}{"A":"123", "B":123}}
Marshal input: main.Extra{X:"456", Y:456, Extra:map[string]interface {}{"A":"456", "B":456}}
json.Marshal: {"X":"456","Y":456}
jsonx.Marshal: {"X":"456","Y":456,"A":"456","B":456}