omg.jsonParser

omg.jsonParser is a simple JSON parser with a simple condition validation. It's a wrapper on standard go JSON lib. With it help you can add the validation condition via golang structure fields tags.

Example

package main

import (
	"fmt"

	"github.com/dedalqq/omg.jsonparser"
)

func main() {
	jsonData := `{"name": ""}`

	st := struct {
		Name string `json:"name,notEmpty"` // added notEmpty for enable validation for it field
	}{}

	err := jsonparser.Unmarshal([]byte(jsonData), &st)
	if err != nil {
		fmt.Println(err.Error()) // print: value [name] must be not empty
	}
}

Tag struct

json:"[name][,option]..."

Tag examples

Here are some the tag examples:

package main

type data struct {
    F1 string   `json:"f1,notEmpty"`          // the field must be not empty but can be "null" or may not exist
    F2 string   `json:"f2,notEmpty,required"` // the field is required and must be not empty but may be the "null" value
    F3 string   `json:"f3,notEmpty,notNull"`  // the field must be not empty and not "null" but may not exist
    F4 []string `json:"f4,notNull,min:3"`     // the field must be not "null" and contains 3 or more items but may not exist
}

Available tags options