Tips and tricks

How to output some random, not directly related items

Say you want to return a few things, for example a proper data item, and also a status code and message. You don't want to create an object just to hold these items for the output view, but instead just use them all directly in the output view. To do this, make the objects instance variables, like usual, eg:

@foo = "bar"
@pop = 123

Then use the "object false" facility in the RABL template, like so:

object false
node(:foo) { @foo }
node(:pop) { @pop }

If @foo is a more complex object, you can just specify which of its attributes to use by using a child() call instead, like this:

model:

class Car
  attr_accessor :car_make, :car_name
end

controller:

@cars = Car.all
@status = "ok"

view:

object false
child(@cars) { attributes :car_name, :car_make }
node(:status) { @status }

output (assuming json roots are turned off):

{ status:"ok", [{ car_make:"Toyota", car_name:"Prius"},...]}