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POundefined method `voted_on?' for nil:NilClass error message using thumbs_up
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  1. POundefined method `voted_on?' for nil:NilClass error message using thumbs_up
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    copied!<p>I'm currently trying to implement likes and unlikes rails app using thumbs_up. I followed the instructions on this page: <a href="https://stackoverflow.com/questions/4907744/clarification-on-how-to-use-thumbs-up-voting-gem-with-rails-3">Clarification on how to use &quot;thumbs_up&quot; voting gem with Rails 3</a></p> <p>Users can like and unlike books. I have 2 buttons, like and unlike and I would like to hide one or the other from the user, depending on the users current like status. So I figured an if else would be appropriate like this: </p> <pre><code>&lt;% if @user.voted_on?(@book) %&gt; &lt;div class="unlike_button"&gt;&lt;%= link_to("Unlike", unvote_book_path(book), method: :post) %&gt;&lt;/div&gt; &lt;% else %&gt; &lt;div class="like_button"&gt;&lt;%= link_to("Like", vote_up_book_path(book), method: :post) %&gt;&lt;/div&gt; &lt;% end %&gt; </code></pre> <p>and in my route.rb file:</p> <pre><code>resources :books do member do post :vote_up post :unvote end end </code></pre> <p>But when I run this I get the error message:</p> <blockquote> <p>undefined method `voted_on?' for nil:NilClass</p> </blockquote> <p>Is there anything I might be doing wrong?</p> <p><em>Update</em></p> <p>As Mischa suggested, I changed it to current_user.voted_on. Now I get this error message:</p> <pre><code>Called id for nil, which would mistakenly be 4 -- if you really wanted the id of nil, use object_id </code></pre> <p>Below is a snippet of my Books controller</p> <pre><code>include UsersHelper include SessionsHelper before_filter :signed_in_user, only: [:index] before_filter :admin_user, only: :destroy def index array = Book.search(params[:search]) @books = Kaminari.paginate_array(array).page(params[:page]).per(5) end def show @book = Book.find(params[:id]) #respond_to do |format| #format.js #end end def destroy Book.find(params[:id]).destroy flash[:success] = "Book deleted." redirect_to books_url end def vote_up begin current_user.vote_for(@book = Book.find(params[:id])) flash[:success] = "Liked!." redirect_to books_url end end def unvote begin current_user.unvote_for(@book = Book.find(params[:id])) flash[:success] = "Unliked!." redirect_to books_url end end </code></pre>
 

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