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POIs it possible to look beyond self in self.posts.find?
 

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    <p>Expanding on recent_posts_on_self below, <strong>I want to add an all_recent_posts_on_self method</strong> but I'm not sure if it's possible <strong>using the syntax self.posts.find</strong>. On the other hand, all_recent_posts_on_class seems straightforward.</p> <pre><code>class User &lt; ActiveRecord::Base has_many :posts, :class_name =&gt; "Post" , :foreign_key =&gt; "author_id" has_many :comments, :class_name =&gt; "Comment", :foreign_key =&gt; "author_id" def recent_posts_on_class Post.find( :all, :conditions =&gt; ['author_id = ?', self.id], :order =&gt; 'created_at asc', :limit =&gt; 5) end def recent_posts_on_self self.posts.find(:all, :order =&gt; 'created_at ASC', :limit =&gt; 5) end end </code></pre> <p>In the example above, I have two ways of finding the recent blog posts that are associated with a user. I can call Post.find and pass it the author_id or I can call self.posts.find and I don't need to pass an author id. I assume this is because in the latter case, self.posts has already been limited based on the primary key of the user object and the has_many :posts associated with this user. This is an advantage in this case because I don't need to go to the trouble of passing author_id as an argument. But if I did not need to limit the query by author, would it be possible to create an all_recent_posts_on_self to do this? </p> <p><strong>What I'm talking about is an equivalent of this method</strong> (which omits the :conditions):</p> <pre><code> def all_recent_posts_on_class Post.find(:all, :order =&gt; 'created_at asc', :limit =&gt; 5) end </code></pre> <p><strong>But using self.posts.find instead of Post.find</strong>:</p> <pre><code> def all_recent_posts_on_self self.posts.find(...) end </code></pre> <p>Also:</p> <p><strong>Even if it's possible to use self.posts.find to do this, is it "better" to use Post.find?</strong></p>
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