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POWhy doesn't this partial render with UJS / jQuery?
 

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  1. POWhy doesn't this partial render with UJS / jQuery?
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    <p>I'm trying to use jQuery to create posts with a form in my Rails 3 project. Here's what I have:</p> <p><em>look below for updated results</em></p> <p>create.js.erb:</p> <pre><code>$("#posts").prepend("#{render(:partial =&gt; 'posts')}"); </code></pre> <p>layouts/application.html.erb:</p> <pre><code>... &lt;script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"&gt;&lt;/script&gt; &lt;%= javascript_include_tag 'rails' %&gt; &lt;%= csrf_meta_tag %&gt; ... </code></pre> <p>posts_controller.rb:</p> <pre><code>def create @post = Post.new(params[:post]) respond_to do |format| if @post.save # ... format.js else # ... end end end </code></pre> <p>When I submit the post form it puts text like <code>#{render(:partial =&gt; 'posts')}</code> where the post ajax should be.</p> <p>EDIT: by changing <code>create.js.erb</code> to:</p> <pre><code>$("#posts").prepend("&lt;%= render(:partial =&gt; 'posts')%&gt;"); </code></pre> <p>I get this error in the terminal when I submit the form:</p> <pre><code>Rendered posts/_posts.html.erb (13.6ms) Rendered posts/create.js.erb (80.4ms) Completed in 1631ms ActionView::Template::Error (You have a nil object when you didn't expect it! You might have expected an instance of Array. The error occurred while evaluating nil.each): 1: &lt;%- for post in @posts -%&gt; 2: &lt;div class="post"&gt; 3: &lt;%= link_to post.title, post %&gt; 4: &lt;%- if post.name? -%&gt; app/views/posts/_posts.html.erb:1:in `_app_views_posts__posts_html_erb___692646030_16112196__738457576' app/views/posts/create.js.erb:1:in `_app_views_posts_create_js_erb__431255654_16166988__591965598' app/controllers/posts_controller.rb:39:in `create' Rendered /usr/local/lib/ruby/gems/1.9.1/gems/actionpack-3.0.0/lib/action_dispatch/middleware/templates/rescues/_trace.erb (10.6ms) Rendered /usr/local/lib/ruby/gems/1.9.1/gems/actionpack-3.0.0/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (54.3ms) Rendered /usr/local/lib/ruby/gems/1.9.1/gems/actionpack-3.0.0/lib/action_dispatch/middleware/templates/rescues/template_error.erb within rescues/layout (102.1ms) </code></pre>
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