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Pastable version of Rails Store has more than many Promos

<pre class='prettyprint' language='ruby'>class Store &lt; ActiveRecord::Base has_many :promos def promos Promo.for_store(self) end def promos? promos.count &gt; 0 end end</pre> <pre class='prettyprint' language='ruby'>class Promo &lt; ActiveRecord::Base belongs_to :store def self.for_store(store=nil, limit=4) return find(:all, :conditions =&gt; [&quot;promos.store_id IS NULL&quot;], :limit =&gt; limit) if store.nil? find(:all, :conditions =&gt; [&quot;promos.store_id = ? or promos.store_id IS NULL&quot;, store.id], :limit =&gt; limit) end end</pre> <a href="http://www.refactormycode.com/codes/1317-rails-store-has-more-than-many-promos" style="color:#fff" title="As seen on RefactorMyCode.com"><img alt="Small_logo" src="http://www.refactormycode.com/images/small_logo.gif" style="border:0" /></a>