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PORails Nested Model Form
 

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    <p>At the moment I have three models:</p> <pre><code>Songs have many Setlists through Allocations Setlists have many Songs through Allocations Allocations belong to Setlists and belong to Songs </code></pre> <p>My form at the moment looks like:</p> <pre><code> &lt;%=f.label :date, "Set a date" %&gt; &lt;%=f.date_select :date%&gt; &lt;div&gt; &lt;%= render 'song' %&gt; &lt;/div&gt; &lt;%=f.submit "Create Setlist", class: "btn btn-large btn-primary" %&gt; </code></pre> <p>the song partial given above is:</p> <pre><code>&lt;div id="songSelection"&gt; &lt;table class= "table table-striped table-bordered"&gt; &lt;thead&gt; &lt;th&gt;Title&lt;/th&gt; &lt;th&gt;Artist&lt;/th&gt; &lt;th&gt;Add to Set&lt;/th&gt; &lt;/thead&gt; &lt;tbody&gt; &lt;% @songs.each do |song| %&gt; &lt;tr&gt; &lt;%= nested_form_for(@setlist.allocations.build(song_id: song.id)) do |builder| %&gt; &lt;td&gt;&lt;%= song.title %&gt;&lt;/td&gt; &lt;td&gt;&lt;%= song.artist %&gt;&lt;/td&gt; &lt;td&gt; &lt;%= builder.submit "Add Song", class: "btn btn-small btn-primary" %&gt; &lt;% end %&gt; &lt;/td&gt; &lt;/tr&gt; &lt;% end %&gt; &lt;/tbody&gt; &lt;/table&gt; &lt;/div&gt; </code></pre> <p>Basically I'm trying to assign songs to setlists through allocations. At the moment it states that the f in the songs partial isn't defined. If I get rid of it then the page renders fine but doesn't function properly (i.e. whenever I click the button to add a song it redirects it saves the changes to the setlist date but doesn't assign any new allocations). Any help would be much appreciated. I realize that I may have missed out information as I'm somewhat new to this so if any additional details are needed please ask.</p> <p>I've tried using the nested form gem by Ryan Bates but I couldn't get it working. I think it's because it's not assigning a song id to the allocation when it goes to try and build it but not sure where/how I'd put that in.</p>
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