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PORuby ActiveRecord 2 level join
 

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    <p>This should be a very basic question, I'm still new to ruby so i'd appreciate some help.</p> <p>So I have 3 tables in my db, Source, SourceType and Feed. Every Source belongs to a SourceType and Every Feed Belongs to a Source. Their primary keys are SourceID, TypeID and FeedID</p> <p>my Active Record Classes are:</p> <pre><code>class SourceFeed &lt; ActiveRecord::Base self.table_name = "SourceFeed" self.primary_key = "FeedID" belongs_to :Source, :foreign_key =&gt; "SourceID", :class_name =&gt; "Source", :include =&gt; "SourceType" end class Source &lt; ActiveRecord::Base self.table_name = "Source" self.primary_key = "SourceID" has_many :SourceFeeds, :primary_key =&gt; "SourceID", :class_name =&gt; "SourceFeed" belongs_to :SourceType, :foreign_key =&gt; "TypeID", :class_name =&gt; "SourceType" end class SourceType &lt; ActiveRecord::Base self.table_name = "SourceType" self.primary_key = "TypeID" has_many :Source, :primary_key =&gt; "TypeID", :class_name =&gt; "Source" end </code></pre> <p>I am trying to select stuff from SourceFeed, Stuff from Source and the SourceType. Here's the query:</p> <pre><code>feed = SourceFeed.select("SourceFeed.FeedID, Source.Name as SourceName, SourceType.Name as SourceType").joins(:Source, :SourceType).where(:FeedID =&gt; FeedID).first </code></pre> <p>I am getting a <code>Association named 'SourceType' was not found; perhaps you misspelled it?</code> Error</p> <p>If I remove it from the Joins, I get an <code>Unknown column 'SourceType.Name' in 'field list'</code> error.</p> <p>What's the right way to do it?</p> <p>Thanks</p> <p>PS: My database doesn't follow active records naming conventions, but I can't change that I am working with an existing DB.</p>
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