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POHow do I create form_for for namespaced nested resources in Rails 3.1.3 and Mongoid?
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  1. POHow do I create form_for for namespaced nested resources in Rails 3.1.3 and Mongoid?
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    copied!<p>I am new to Rails and am trying to create an Api for a mobile app. Although the Api will generate json responses, I also need a web interface to create the data. My routes look like this:</p> <pre><code>Appone::Application.routes.draw do namespace :api1 do resources :reldates do resources :movies end end end </code></pre> <p>The release_date model:</p> <pre><code>class Api1::Reldate include Mongoid::Document include Mongoid::MultiParameterAttributes include Mongoid::Timestamps field :release_date, :type =&gt; Date embeds_many :api1_movies validates_associated :movie accepts_nested_attributes_for :movie end </code></pre> <p>The Movie Model:</p> <pre><code>class Api1::Movie include Mongoid::Document include Mongoid::MultiParameterAttributes include Mongoid::Timestamps field :title, :type =&gt; String field :release_type, :type =&gt; String field :release_number, :type =&gt; Integer embedded_in :api1_reldate, :inverse_of =&gt; :api1_movies end </code></pre> <p>and the reldate show.html.erb:</p> <pre><code>&lt;p id="notice"&gt;&lt;%= notice %&gt;&lt;/p&gt; &lt;p&gt; &lt;b&gt;Release date:&lt;/b&gt; &lt;%= @api1_reldate.release_date %&gt; &lt;/p&gt; &lt;% if @api1_reldate.api1_movies.size &gt; 0 %&gt; &lt;h2&gt;Movies&lt;/h2&gt; &lt;% for api1_movie in @api1_reldate.api1_movies %&gt; &lt;h3&gt;&lt;%= api1_movie.title %&gt;&lt;/h3&gt; &lt;p&gt;&lt;%= api1_movie.release_type %&gt;&lt;/p&gt; &lt;p&gt;&lt;%= api1_movie.release_number %&gt;&lt;/p&gt; &lt;% end %&gt; &lt;% end %&gt; &lt;h2&gt;New Movies&lt;/h2&gt; &lt;% form_for([:api1], :url =&gt; { :action =&gt; :create ,:id =&gt; @reldate.movie}) do |form| %&gt; &lt;p&gt;&lt;%= f.label :title %&gt; &lt;%= f.text_field :title %&gt;&lt;/p&gt; &lt;p&gt;&lt;%= f.label :release_type %&gt; &lt;%= f.text_field :release_type %&gt;&lt;/p&gt; &lt;p&gt;&lt;%= f.label :release_number %&gt; &lt;%= f.number_field :release_number %&gt;&lt;/p&gt; &lt;p&gt;&lt;%= f.submit %&gt;&lt;/p&gt; &lt;% end %&gt; &lt;%= link_to 'Edit', edit_api1_reldate_path(@api1_reldate) %&gt; | &lt;%= link_to 'Back', api1_reldates_path %&gt; </code></pre> <p>I am unable to get this to work. I can get the reldate page working but after I click on submit, I get an error like this:</p> <pre><code>undefined method `movie' for nil:NilClass Extracted source (around line #18): 15: &lt;% end %&gt; 16: 17: &lt;h2&gt;New Movies&lt;/h2&gt; 18: &lt;% form_for([:api1], :url =&gt; { :action =&gt; :create ,:id =&gt; @reldate.movie}) do |form| %&gt; 19: &lt;p&gt;&lt;%= f.label :title %&gt; &lt;%= f.text_field :title %&gt;&lt;/p&gt; 20: &lt;p&gt;&lt;%= f.label :release_type %&gt; &lt;%= f.text_field :release_type %&gt;&lt;/p&gt; 21: &lt;p&gt;&lt;%= f.label :release_number %&gt; &lt;%= f.number_field :release_number %&gt;&lt;/p&gt; </code></pre> <p>The movie controller look like this:</p> <pre><code>class Api1::MoviesController &lt; ApplicationController def create @api1_reldate = Api1::Reldate.find(params[:api1_reldate_id]) @api1_movie = @api1_reldate.api1_movies.create!(params[:api1_movie]) redirect_to @api1_reldate, :notice =&gt; "Movie successfully created!" end end </code></pre> <p>How can I get this to work? I have tried every possible solution available, but it keeps failing. Also, I am using Ryan Bates <a href="http://railscasts.com/episodes/238-mongoid" rel="nofollow">Railcast</a> </p> <p>Thanks in advance.</p>
 

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