POST 422 (Unprocessable Entity) in Rails? Due to the routes or the controller?

Question

I'm trying to give users on my website "points" or "credits" for tweeting about out the brand name.

I have the fancy twitter widget on the appropriate view...

<p><a  href="https://twitter.com/share" class="twitter-share-button" data-text="Check Out This Awesome Website Yay" data-via="BrandName" data-hashtags="ProductName">Tweet</a>
<div id="credited"></div>
<script>window.twttr = (function (d, s, id) {
  var t, js, fjs = d.getElementsByTagName(s)[0];
  if (d.getElementById(id)) return;
  js = d.createElement(s); js.id = id;
  js.src= "https://platform.twitter.com/widgets.js";
  fjs.parentNode.insertBefore(js, fjs);
  return window.twttr || (t = { _e: [], ready: function (f) { t._e.push(f) } });
}(document, "script", "twitter-wjs"));
</script>    

I have the JS all written up and pretty....

function creditTweet() {
  $.post(
    "/credit_tweet",
    {},
    function(result) {
      var text;
      if (result.status === "noop") {
        text = "Thanks for sharing already!";
      } else if (result.status === "ok") {
        text = "5 Kredit Added";
      }
      $("#credited").html(text);
    }
  );
}

$(function() {
  twttr.ready(function (twttr) {
    window.twttr.events.bind('tweet', creditTweet);
  }); 
});

Now the problem is either in the controller OR in the routes (where I'm posting). I think the routes are fine because the POST is almost working, because this is the description of the error on wikipedia - "422 Unprocessable Entity (WebDAV; RFC 4918) The request was well-formed but was unable to be followed due to semantic errors."

So, do you guys see anything wrong with my ruby code in the controller?

class SocialKreditController < ApplicationController
    TWEET_CREDIT_AMOUNT = 5

  def credit_tweet
    if !signed_in?
      render json: { status: :error }
    elsif   current_user.tweet_credited
        Rails.logger.info "Not crediting #{ current_user.id }"
        render json: { status: :noop }
      else
        Rails.logger.info "Crediting #{ current_user.id }"
        current_user.update_attributes tweet_credited: true
        current_user.add_points TWEET_CREDIT_AMOUNT
        render json: { status: :ok }
      end
  end
end

And in my routes.rb, it's pretty straight forward, so I doubt there's anything wrong here...

  get 'social_kredit/credit_tweet'
  post '/credit_tweet' => 'social_kredit#credit_tweet'

Where oh where is this error? I clearly don't know smack about HTTP requests.

Answer 1

I got it working!

I added a...

skip_before_action :verify_authenticity_token

to the controller.

The issue was found when checking out the logs and seeing that the CSRF token could not be verified.