CODEWITHSUNDEEP
ruby-on-rails
Andrew
Andrew

Reputation: 238727

How to halt Rails controller action from a before filter and respond with 422 unprocessable entity?

I have a method ("before filter") in my Rails controller that needs to respond with a 422 status code if some params are missing. How can I do this from within a before filter?

class FoobarsController < ApplicationController
  before_action :find_parent

  def create
    if @parent.foobar.save
      render @parent.foobar, status: :created
    else
      render @parent.foobar.errors, status: :unprocessable_entity
    end
  end

  def find_parent
    if params[:parent_id]
      @parent = Parent.find(params[:parent_id])
    elsif params[:foobar_id]
      @parent = Foobar.find(params[:foobar_id])
    else
      raise 'Missing parent ID param' # TODO: respond with 422 status instead of 500
    end
  end
end

Upvotes: 1

Views: 1409

Answers (1)

dimakura
dimakura

Reputation: 7655

:status option of render method will do the trick:

render status: 422

or

render status: :unprocessable_entity

More info can be found here.

Also as @MaxWilliams noted in the comment, in complicated code, like yours, it's a good practice to use return with render statement:

render(status:422) and return

Upvotes: 2

Related Questions