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POConflicting associations in has_many_polymorphs
 

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  1. POConflicting associations in has_many_polymorphs
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    <p>I'm using has_many_polymorphs to create a "Favorites" feature on a site where multiple users can post stories and make comments. I want users to be able to "favorite" stories and comments.</p> <pre><code>class User &lt; ActiveRecord::Base has_many :stories has_many :comments has_many_polymorphs :favorites, :from =&gt; [:stories, :comments] end class Story &lt; ActiveRecord::Base belongs_to :user, :counter_cache =&gt; true has_many :comments end class Comment &lt; ActiveRecord::Base belongs_to :user, :counter_cache =&gt; true belongs_to :story, :counter_cache =&gt; true end class FavoritesUser &lt; ActiveRecord::Base belongs_to :user belongs_to :favorite, :polymorphic =&gt; true end </code></pre> <p>Now say @user writes a story. Now @user.stories.size = 1. Then @user favorites a different story. Now @user.stories... wait a minute. @user has_many :stories and :has_many :stories through :favorites.</p> <p>The issue arises when I attempt to call @user.stories or @user.comments. I want to call @user.stories for stories they own and @user.favorites.stories for stories they favorite.</p> <p>So I tried this:</p> <pre><code>class User &lt; ActiveRecord::Base has_many :stories has_many :comments has_many_polymorphs :favorites, :from =&gt; [:favorite_stories, :favorite_comments] end </code></pre> <p>and then subclassed Story and Comment like so:</p> <pre><code>class FavoriteStory &lt; Story end class FavoriteComment &lt; Comment end </code></pre> <p>That fixed the problem because now I can call @user.stories and @user.favorite_stories.</p> <p><strong>BUT</strong> when I get this error in reference to comments: </p> <p><strong>ActiveRecord::Associations::PolymorphicError in UsersController#show</strong> </p> <pre><code>Could not find a valid class for :favorite_comments (tried FavoriteComment). If it's namespaced, be sure to specify it as :"module/favorite_comments" instead. </code></pre> <p>I found discussion of this error in a <a href="https://github.com/fauna/has_many_polymorphs/issuesearch?state=open&amp;q=PolymorphicError#issue/2" rel="nofollow">similar context</a>, but it doesn't answer my question.</p> <p>What's going on here? How can I do this better?</p>
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    1. COI'm having the same problem here: http://stackoverflow.com/questions/5768764/how-to-set-up-these-crud-controller-actions-for-has-many-polymorphs-and-an-error what did you end up doing?
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