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PORails nested form with a "select" form element giving me "undefined method `merge' for #<ActiveSupport::SafeBuffer:0xb50d34b8>"
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  1. PORails nested form with a "select" form element giving me "undefined method `merge' for #<ActiveSupport::SafeBuffer:0xb50d34b8>"
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    copied!<p>Background: My goal is for a view to display a list of "condition" has_many objects, which are themselves STI subclasses of a StateDescription. I want a user to be able to pick what type of state description they are from a drop down menu (which will conditionally display a different type of form, eventually)</p> <p>Inside of my main forms, I am doing a nested form like this:</p> <pre><code> &lt;%= f.fields_for :conditions do |e| %&gt; &lt;li&gt; &lt;%= e.select(:type, StateDescription.subclasses.collect{|x| x.to_s}, options_for_select(StateDescription.subclassSelectForms)) %&gt; &lt;br&gt; &lt;%= e.label :title %&gt; &lt;%= e.text_field :title %&gt; &lt;/li&gt; &lt;% end %&gt; </code></pre> <p>This works just fine with the text field at the bottom there (I can change values and save them, etc). But when I try to do a select statement, it explodes.</p> <p>Specifically, if I don't use e.select and just do:</p> <pre><code>&lt;%= select(:type, StateDescription.subclasses.collect{|x| x.to_s}, options_for_select(StateDescription.subclassSelectForms)) %&gt; </code></pre> <p>it renders just fine, but doesn't actually change any values as it is not associated with a model.</p> <p>If I get rid of trying to have it display a value different than it submits and just do</p> <pre><code>&lt;%= e.select(:type, StateDescription.subclasses.collect{|x| x.to_s}) %&gt; </code></pre> <p>Then it works just fine(I can submit, the value is saved to the database, I can retrieve it, etc).</p> <p>I can LEAVE it like this, but I had wanted to have my more human readable string display instead of a rails class thing (which might look like gibberish to a non-programmer end user). </p> <p><strong>So, my question is</strong>: Why do options_for_select break when nested and associated with a form, but dont' seem to when not associated with a form? Is it just a known bug? Am I doing something wrong?</p> <p>Edit:</p> <p>.subclasses is a standard rails calls which returns a list of subclasses for an object. </p> <p>.subclassSelect forms goes through each subclass, and turns it into a hash of the form:</p> <p>{subclass.to_s => subclass.human_readable_string} and compiles all of them into an array.</p> <p>I know this array of hashes works, because if I do NOT put "e" on the front, it displays correctly and works "right" for what I have done (i.e. the subclass is returned correctly based on which human readable string I select from the drop down menu, but since it's not actually associated with any form, it doesn't get set in the controller). </p>
 

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