Grails parse JSON into domain class

Question

Hi Say that I have a domain class

class Book{
static hasOne=[author:Author]
long id
String name

}

class Author {
static hasMany=[books:Book]
long id
String name
}

I have a json object sent in. Can I jus do a new Book(Json) and not manually set the property?

You may have to use new Book(JSON.parse(params)) to get it in the right format for GORM — bschipp, Dec 16 '13 at 06:16

score 8 · Answer 1 · edited Jan 08 '14 at 23:47

8

Using the built-in Grails JSON converter makes this easier

import grails.converters.JSON

class BookController {
   def save = {
      def book = new Book(JSON.parse(yourJson))
      book.save(flush:true)
   }
}

In the code what's happening (we're parsing a JSON object and setting the properties on the Book entity and saving

edited Jan 08 '14 at 23:47

billjamesdev

14,554
6
53
76

answered Dec 16 '13 at 08:36

Deepak

2,287
1
23
30

I have problems with this when Data types are involved ... since in the JSON they appear as e.g. "2020-11-11" and i get as null in the domain class aftar parsing – Rafael Dec 18 '14 at 11:37
1

Nice answer, it parses childs and put them in instances too. – IgniteCoders Nov 21 '18 at 13:51

score -1 · Answer 2 · answered Dec 16 '13 at 08:34

-1

use the JsonBinder:

def json = request.JSON;
def book= new Book();
JsonBinder.bindJSON(book, json);

dont forget to import these packages:

import grails.converters.JSON;
import com.ocom.grails.JsonBinder;

answered Dec 16 '13 at 08:34

user1577161

165
1
4
18

Grails parse JSON into domain class

2 Answers2