Ok, I have a very simple app created in Grails. I have a generated domain class (Person) and its generated controller, using the automatic Grails scaffold:
package contacts
class PersonController {
def scaffold = Person
}
Now I'd like to get a JSON representation of a Person object.
Do I have to change the view or the controller? And how?
Thank you.
Add the following to your controller:
def list = {
params.max = Math.min(params.max ? params.int('max') : 10, 100)
def personList = Person.list(params)
withFormat {
html {
[personInstanceList: personList, personInstanceTotal: Person.count()]
}
json {
render personList as JSON
}
}
}
This should support both your scaffolding and the JSON output.
You can access the scaffolding as:
http://localhost:8080/contacts/person/list
You can access the Person list as json with:
http://localhost:8080/contacts/person/list?format=json
There are other ways to do it too, but I like doing it this way to leave the scaffolding around for testing.
static responseFormats = ["json","html"] in your controller and keep the generated code as is (like respond User.list(params) ...). No need to write code to handle formats. The shame is that we should be able to use scaffold AND json without having to generate any controller code