How to obtain JSON (or XML) response from Grails? - rest

Question

I have 1 domain class, 1 controller, 1 URL mapping (see below). I want to send request, and receive JSON response.
But currently my request is correctly mapped to the correspondent controller method, the method is successfully executed, and then I get an error with message that jsp-file not available.
How to explain Grails, that I don't need no jsp-files: I want to receive/parse JSON requests, and send JSON responses right from my controllers?
class Brand {
String name
String description
String logoImageURL
static constraints = {
name(blank: false)
}
}
---------------------------
class UrlMappings {
static mappings = {
"/brands"(controller: "brand", parseRequest: true, action: "list")
}
}
---------------------------
import grails.converters.JSON
class BrandController {
def list = {
return Brand.list() as JSON
}
def show = {
return Brand.get(params.id) as JSON
}
def save = {
def brand = new Brand(name: params.name, description: params.description, logoImageURL: params.logoURL)
if (brand.save()) {
render brand as JSON
} else {
render brand.errors
}
}
}
============== Error message ===============
Request URL: http://localhost:8080/ShoesShop/brands
message /ShoesShop/WEB-INF/grails-app/views/brand/list.jsp
description The requested resource (/ShoesShop/WEB-INF/grails-app/views/brand/list.jsp) is not available.

Answer 1

It should work if you instead do:
def list = {
render Brand.list() as JSON
}