POST 422 (Unprocessable Entity) in Rails? Due to t

问题:

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.

回答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.

回答2:

Same problem I faced. It sorts out after adding

skip_before_action :verify_authenticity_token

at the top of your controller where your JS is calling or sending data.

class UserController < ApplicationController
    skip_before_action :verify_authenticity_token
    def create
    end
end

as shown in code snippet.