Grails - Initiating domain class using JSON

Question

I have this simple domain class:

class Settings {
static constraints = {
    uid(nullable: false, unique: true)
    person()
}

String uid
Map person
}

and a web UI that update the data using a json request:

{"uid":1234 , person:{"first_name" : "jhon" , "last_name" : "doe"}}

in the controller code:

def json = request.JSON;
def s = new Settings(json);

it seems that s.uid is being set however the s.person Map remains empty. What am I missing?

this is probably a Grails bug http://jira.grails.org/browse/GRAILS-9220?page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel — Shlomi Schwartz, Feb 26 '13 at 09:18

score 2 · Answer 1 · answered Feb 25 '13 at 16:51

2

You can do something like the following in your controller:

def json = request.JSON;
def s = new Settings(json);
s.person = json.person;

it's ugly, but the data binding doesn't seem to handle nested json

answered Feb 25 '13 at 16:51

aldrin

Thanks for the reply ... this is odd, I will be stubborn and continue the search for a solution – Shlomi Schwartz Feb 26 '13 at 06:48

score 1 · Answer 2 · answered Feb 25 '13 at 13:22

1

If you want that to work you need to convert your structure to this:

{"uid":1234 , "person.first_name": "jhon" , "person.last_name": "doe"}

answered Feb 25 '13 at 13:22

James Kleeh

thanks for the reply however the UI JSON is a given and cannot be changed. I'm sure there is a smoother solution :) – Shlomi Schwartz Feb 25 '13 at 13:29

score 0 · Answer 3 · answered Feb 04 '16 at 22:45

0

If you add this line before instantiating Settings, it will bind recursively.

JSON.use('deep')

answered Feb 04 '16 at 22:45

Dustin

3 Answers3