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POCannot favorite users using polymorphic association
 

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    <p>Using the system below <strong>users</strong> are able to favorite <strong>styles</strong> in the format of: </p> <pre><code>=&gt; #&lt;Favorite id: 59, user_id: 2, favoritable_id: 15, favoritable_type: "Style", created_at: "2013-04-06 08:47:08", updated_at: "2013-04-06 08:47:08"&gt; </code></pre> <p>I have built the system to enable <strong>users</strong> to favorite <strong>users</strong> as well, but for some reason the line <code>Favorite.create!(:user =&gt; user)</code> is not creating the expected favorite model object when called on <strong>User</strong>, as above when called on <strong>Style</strong>. Instead I am getting nils as below:</p> <pre><code>=&gt; #&lt;Favorite id: 65, user_id: 2, favoritable_id: nil, favoritable_type: nil, created_at: "2013-04-06 09:35:07", updated_at: "2013-04-06 09:35:07"&gt; </code></pre> <hr> <hr> <p><strong>Problem is above. Details are below</strong></p> <hr> <hr> <p>Favorite Class:</p> <pre><code>class Favorite &lt; ActiveRecord::Base belongs_to :favoritable, :polymorphic =&gt; true belongs_to :user attr_accessible :user validates_presence_of :user validates_uniqueness_of :user_id, :scope =&gt; [:favoritable_type, :favoritable_id] end </code></pre> <p>Model definitions including favoritable module (see below):</p> <pre><code>class User &lt; ActiveRecord::Base include Favoritable class Style &lt; ActiveRecord::Base include Favoritable </code></pre> <p>Favoritable Module:</p> <pre><code>module Favoritable extend ActiveSupport::Concern included do attr_accessible :favorites has_many :favorites, :as =&gt; :favoritable, :autosave =&gt; true accepts_nested_attributes_for :favorites def add_favorite(user) self.favorites &lt;&lt; Favorite.create!(:user =&gt; user) save end def delete_favorite(user) self.favorites.where(:user_id =&gt; user.id).each do |favorite| favorite.destroy end end end end </code></pre> <p>Favorites Controller:</p> <pre><code>class FavoritesController &lt; ApplicationController def fav_user @user = User.find(params[:id]) @user.add_favorite(current_user) respond_to do |format| format.js { render :action =&gt; "update_favorite_disp", :layout =&gt; false } end end def delete_fav_user @user = User.find(params[:id]) respond_to do |format| if @user.delete_favorite(current_user) format.js { render :action =&gt; "update_favorite_disp", :layout =&gt; false } end end end def fav_style @style = Style.find(params[:id]) @style.add_favorite(current_user) respond_to do |format| format.js { render :action =&gt; "update_favorite", :layout =&gt; false } end end def delete_fav_style @style = Style.find(params[:id]) respond_to do |format| if @style.delete_favorite(current_user) format.js { render :action =&gt; "update_favorite", :layout =&gt; false } end end end end </code></pre>
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