Problems with a POST/PUT Json RESTful request Grails - json

Question

Hi I have a grails restful code. I do perfect a Json get and delete request.
My problem is:
I want to do a Put or post request with json but if I use a program to do that It has an error and I cant do it!
Here my code:
One class:
package catalogo.json
class Catalogo {
String nombre
String descripcion
String url
Set <Parametros>parametros =[]
static hasMany = [parametros:Parametros]
int numeroParametros = parametros.size()
}
And other class:
package catalogo.json
class Parametros {
String tipoParametro
String json
static constraints = {
tipoParametro(nullable:true)
json(nullable:true)
}
}
I don't know how to put my json in the request. Heres the error when I put it.
EXAMPLE:
I PUT POST request.
body application/json (or text/json is the same error) Charset-utf-8
{"descripcion": "bla", "nombre" : "lalala", "numeroParametros":3, "parametros":[{
"tipoParametro":"string", "json":"bla"}],"url":"http://www.google.com"}
And here the error:
Could not create new Catalogo due to errors:
grails.validation.ValidationErrors: 3 errors
Field error in object 'catalogo.json.Catalogo' on field 'descripcion': rejected value [null]; codes [catalogo.json.Catalogo.descripcion.nullable.error.catalogo.json.Catalogo.descripcion,catalogo.json.Catalogo.descripcion.nullable.error.descripcion,catalogo.json.Catalogo.descripcion.nullable.error.java.lang.String,catalogo.json.Catalogo.descripcion.nullable.error,catalogo.descripcion.nullable.error.catalogo.json.Catalogo.descripcion,catalogo.descripcion.nullable.error.descripcion,catalogo.descripcion.nullable.error.java.lang.String,catalogo.descripcion.nullable.error,catalogo.json.Catalogo.descripcion.nullable.catalogo.json.Catalogo.descripcion,catalogo.json.Catalogo.descripcion.nullable.descripcion,catalogo.json.Catalogo.descripcion.nullable.java.lang.String,catalogo.json.Catalogo.descripcion.nullable,catalogo.descripcion.nullable.catalogo.json.Catalogo.descripcion,catalogo.descripcion.nullable.descripcion,catalogo.descripcion.nullable.java.lang.String,catalogo.descripcion.nullable,nullable.catalogo.json.Catalogo.descripcion,nullable.descripcion,nullable.java.lang.String,nullable]; arguments [descripcion,class catalogo.json.Catalogo]; default message [La propiedad [{0}] de la clase [{1}] no puede ser nulo]
Field error in object 'catalogo.json.Catalogo' on field 'nombre': rejected value [null]; codes [catalogo.json.Catalogo.nombre.nullable.error.catalogo.json.Catalogo.nombre,catalogo.json.Catalogo.nombre.nullable.error.nombre,catalogo.json.Catalogo.nombre.nullable.error.java.lang.String,catalogo.json.Catalogo.nombre.nullable.error,catalogo.nombre.nullable.error.catalogo.json.Catalogo.nombre,catalogo.nombre.nullable.error.nombre,catalogo.nombre.nullable.error.java.lang.String,catalogo.nombre.nullable.error,catalogo.json.Catalogo.nombre.nullable.catalogo.json.Catalogo.nombre,catalogo.json.Catalogo.nombre.nullable.nombre,catalogo.json.Catalogo.nombre.nullable.java.lang.String,catalogo.json.Catalogo.nombre.nullable,catalogo.nombre.nullable.catalogo.json.Catalogo.nombre,catalogo.nombre.nullable.nombre,catalogo.nombre.nullable.java.lang.String,catalogo.nombre.nullable,nullable.catalogo.json.Catalogo.nombre,nullable.nombre,nullable.java.lang.String,nullable]; arguments [nombre,class catalogo.json.Catalogo]; default message [La propiedad [{0}] de la clase [{1}] no puede ser nulo]
Field error in object 'catalogo.json.Catalogo' on field 'url': rejected value [null]; codes [catalogo.json.Catalogo.url.nullable.error.catalogo.json.Catalogo.url,catalogo.json.Catalogo.url.nullable.error.url,catalogo.json.Catalogo.url.nullable.error.java.lang.String,catalogo.json.Catalogo.url.nullable.error,catalogo.url.nullable.error.catalogo.json.Catalogo.url,catalogo.url.nullable.error.url,catalogo.url.nullable.error.java.lang.String,catalogo.url.nullable.error,catalogo.json.Catalogo.url.nullable.catalogo.json.Catalogo.url,catalogo.json.Catalogo.url.nullable.url,catalogo.json.Catalogo.url.nullable.java.lang.String,catalogo.json.Catalogo.url.nullable,catalogo.url.nullable.catalogo.json.Catalogo.url,catalogo.url.nullable.url,catalogo.url.nullable.java.lang.String,catalogo.url.nullable,nullable.catalogo.json.Catalogo.url,nullable.url,nullable.java.lang.String,nullable]; arguments [url,class catalogo.json.Catalogo]; default message [La propiedad [{0}] de la clase [{1}] no puede ser nulo]
EDIT HERE MY CONTROLLER:
package catalogo.json
import grails.converters.JSON
class CatalogoController {
def index = {
switch(request.method){
case "POST":
def catalogo = new Catalogo(params.catalogo)
if(catalogo.save()){
response.status = 201 // Created
render catalogo as JSON
}
else{
response.status = 500 //Internal Server Error
render "Could not create new Airport due to errors:\n
${catalogo.errors}"
}
break
case "GET":
if(params.id){render Catalogo.findById(params.id) as JSON}
else{render Catalogo.list() as JSON}
break
case "PUT":
def catalogo = Catalogo.findById(params.catalogo.id)
catalogo.properties = params.catalogo
if(catalogo.save()){
response.status = 200 // OK
render catalogo as JSON
}
else{
response.status = 500 //Internal Server Error
render "Could not create new Catalogo due to errors:\n ${catalogo.errors}"
}
break
case "DELETE":
if(params.id){
def catalogo = Catalogo.findById(params.id)
if(catalogo){
catalogo.delete()
render "Successfully Deleted."
}
else{
response.status = 404 //Not Found
render "${params.id} not found."
}
}
else{
response.status = 400 //Bad Request
render """DELETE request must include the ID code
Example: /rest/catalogo/id
"""
}
break
}
}
def list = {
if(!params.max) params.max = 10
def list = Catalogo.list(params)
withFormat{
html{
return [catalogoList:list]
}
json{
render list as JSON
}
}
}
}
Thanks

Answer 1

Here is how it should be done in controllers:-
def index() {
//JSON Object is not bound to params it is bound to request in POST/PUT
def jsonObj = request.JSON
//You can also use JSON.parse() to get a JSON object if the request payload has JSON as string
//def jsonObj = JSON.parse(request)
//You will not be able to save the inner JSONArrays if you
// directly bind the jsonObj to the domain. in order to save
//convert them to the proper domain objects otherwise you would get validation errors for parametros
def catalogParams = [] as Set
jsonObj.parametros.each{
catalogParams << new CatalogParams(it)
}
//Set the domain back to the jsonObj
jsonObj.parametros = catalogParams
//Bind to catalog
def catalog = new Catalog(jsonObj)
//Synonymous to new Catalog(params) but here you cannot use params.
//Save
if (!catalog.save(flush: true)){
catalog.errors.each {
println it
}
}
render catalog
}
//Domain Classes:-
class CatalogParams {
String tipoParametro
String json
static constraints = {
tipoParametro(nullable:true)
json(nullable:true)
}
}
class Catalog {
String nombre
String descripcion
String url
Set<CatalogParams> parametros = []
static hasMany = [parametros: CatalogParams]
int numeroParametros = parametros.size()
}
REST Client:
How are you testing the REST WS? You should have a REST client to test the service? Or you can use REST console extension in Chrome to test your service. You can also use a grails plugin rest-client-builder to test your service. In basic terms, if you do not want any client implementation then atleast a script to test your service. HttpBuilder will be useful in this case:. Something like this is required to test your service
import groovyx.net.http.HTTPBuilder
def http = new HTTPBuilder('http://yourdomain.com/catalog/')
http.request(POST, JSON) {
requestContentType = ContentType.APPLICATION_JSON // coreesponding to application/json
body = ["descripcion": "bla", "nombre" : "lalala", "numeroParametros":3, "parametros":[{ "tipoParametro":"string", "json":"bla"}],"url":"google.com"]
response.success = { resp ->
assert resp.statusLine.statusCode == 200
}
}