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Grails JSON Converter


Grails JSON Converter

By : Fiorella Fontana Gil
Date : November 17 2020, 12:01 PM
Any of those help The value you get back from your method is a grails.converters.JSON, which is not a directly accessible JSON tree as such, but simply an object that knows how to serialize itself as JSON when required. If you want direct access to the JSON tree structure then you need to tell the grails.converters.JSON object to serialize itself and then pass that JSON to JSON.parse to turn it into a JSONElement (or one of its subclasses, in this case presumably a JSONObject).
code :


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Grails/Groovy adding properties to existing Java class, losing them when trying to serialize using JSON converter?

Grails/Groovy adding properties to existing Java class, losing them when trying to serialize using JSON converter?


By : Alec De Ruiter
Date : March 29 2020, 07:55 AM
like below fixes the issue I think the JSON conversion in grails does not pick up dynamically added properties.
Maybe you should register your own object marshaller for the class in question?
code :
    def init = {servletContext ->
        JSON.registerObjectMarshaller(ResetRequest) {req->
            [
                targetIp:req.targetIp
                //etc 
            ]
    }
JSON converter in Grails

JSON converter in Grails


By : Anton Vladimirov
Date : March 29 2020, 07:55 AM
like below fixes the issue You can register your own JSON marshaller (at BootStrap.groovy, for example), like:
code :
JSON.registerObjectMarshaller(Person) { Person it ->
  return [
    id    : it.id, 
    email : it.email 
  ]
}
How to set date format for JSON converter in Grails

How to set date format for JSON converter in Grails


By : Md Jahid Cprs
Date : March 29 2020, 07:55 AM
seems to work fine I generally use a custom Marshaller. Assume you have the following Domain
code :
class Address { 
  String addressOne
  String city
  //bla bla
  Date dateCreated
}
class AddressMarshaller {
  void register() {
     JSON.registerObjectMarshaller(Address) { Address address ->
      return [ 
         id: address.id,
         addressOne: address.addressOne,
         city: address.city,
         dateCreated: address.dateCreated.format('yyyy-MM-dd')
      ]
  }
}
[ new AddressMarshaller() ].each { it.register() }
Grails JSON converter and JSONObject code breaks when moved to src/groovy

Grails JSON converter and JSONObject code breaks when moved to src/groovy


By : user2297562
Date : March 29 2020, 07:55 AM
hop of those help? You've declared jsonify() and cleanJson() as instance methods and try to use them as static. Declare them as static and it should work:
code :
class JsonUtils {

    def static jsonify(obj, ArrayList removeableKeys = []) {
       (...)
    }

    def static cleanJson(json) {
        (...)
    }
}
grails json converter only returns strings not numbers, integers or doubles

grails json converter only returns strings not numbers, integers or doubles


By : Victoria
Date : March 29 2020, 07:55 AM
this will help I had this same issue. The only way I could get it to work was like this...
Add this to top of your Service Class:
code :
import groovy.json.*
def testMap(){
    //my results from a query
    List query = [[name:"price",value:"4.23",type:"double"],[name:"title",value:"box",type:"string"]]
    def slrp = new JsonSlurper()
    def results = [:]
    query.each{ row ->
        if (row.type == "double"){

            //results << ["'${row.name}'": "${row.value}"]
            results  << slrp.parseText('{"' + row.name + '":' +  row.value + '}')
        }
        else
        {
            //what do I do here?
            results << slrp.parseText('{"' + row.name + '":"' + row.value + '"}')
            //results << ["'${row.name}'": "'${row.value}'"]

        }
    }        
    return results
}
{"price":4.23,"title":"box"}
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