How to remove field from JSON in Grails

Question

I have implemented domain class:

package xxx

class Machine {

    String name

    static constraints = {
    }
}

and I also have got a service:

package xxx

import javax.ws.rs.Path
import javax.ws.rs.GET
import javax.ws.rs.Produces
import grails.converters.JSON
import org.json.simple.JSONObject


@Path('/api/machine')
class MachineService {

    @GET
    @Produces(['application/json'])
    def String readAll() {
        Machine.findAll() as JSON
    }
}

and the output is:

[{"class":"xxx.Machine","id":1,"name":"test1"},{"class":"xxx.Machine","id":2,"name":"test2"},{"class":"xxx.Machine","id":3,"name":"test3"}]

I would like to remove field "class". Could you show me the easiest way to reach this goal ?

Do you always want to remove class when this is converted to JSON or just in this instance? — James Kleeh, May 31 '13 at 13:47
I have got plenty domains and I want to remove this field from all domains. — ruhungry, May 31 '13 at 13:47
If you are talking about across domains, you may need to extend the JSON converter to always exclude it. — James Kleeh, May 31 '13 at 13:48
Could you explain me how? I am looking for the easiest solution. Let's assume that I want to remove this field only from domain Machine, right ? — ruhungry, May 31 '13 at 13:50
See http://stackoverflow.com/questions/16565219/how-to-only-send-certain-properties-of-a-class-as-json/16566041#16566041 — James Kleeh, May 31 '13 at 13:52
It looks good, but I only want to remove one field...grails does not support it ? — ruhungry, May 31 '13 at 13:57

score 2 · Accepted Answer · edited Jun 20 '20 at 09:12

2

See my answer here. Just register custom marshaller and remove class property from all rendered classes

Update: Change excluded properties like this: String[] excludedProperties=['metaClass','class']

edited Jun 20 '20 at 09:12

Community

1
1

answered May 31 '13 at 14:34

Mr. Cat

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how can I remove class property ? – ruhungry May 31 '13 at 15:12
Have you read the answer? The full description is here. Change excluded properties like this: String[] excludedProperties=['metaClass','class'] and thats it. – Mr. Cat May 31 '13 at 15:27
Eh, sorry...I had been trying plenty solutions before I tried this one. After quick nap I read your post again and of course, it works :) – ruhungry Jun 01 '13 at 11:51

How to remove field from JSON in Grails

1 Answers1