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PORails + CarrierWave: NoMethodError: undefined method `name' for nil:NilClass
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  1. PORails + CarrierWave: NoMethodError: undefined method `name' for nil:NilClass
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    copied!<p>I am using CarrierWave with Rails 3.1. I am getting the following error message when I submit the form (trying to upload an image):</p> <p>Error Message:</p> <pre><code>ActiveRecord::StatementInvalid in Admin::PostsController#create NoMethodError: undefined method `name' for nil:NilClass: INSERT INTO "posts" ("body", "created_at", "draft", "image", "post_type", "title", "updated_at", "user_id") VALUES (?, ?, ?, ?, ?, ?, ?, ?) Rails.root: /Users/aziz/Sandbox/ruby/rails/Tumblelog Application Trace | Framework Trace | Full Trace app/controllers/admin/posts_controller.rb:18:in `create' Request Parameters: {"utf8"=&gt;"✓", "authenticity_token"=&gt;"za+zNRDGNCcujnCmO726cWCo2ze1rgaXv5bL17JGaek=", "post"=&gt;{"image"=&gt;#&lt;ActionDispatch::Http::UploadedFile:0x000001014aeff0 @original_filename="AzizLight.jpeg", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"post[image]\"; filename=\"AzizLight.jpeg\"\r\nContent-Type: image/jpeg\r\n", @tempfile=#&lt;File:/var/folders/ky/2ddtbt0d7k1g__2ctr8njcfc0000gn/T/RackMultipart20110918-21704-hp2ajt&gt;&gt;, "draft"=&gt;"0", "user_id"=&gt;"2", "post_type"=&gt;"image"}, "commit"=&gt;"Post"} </code></pre> <p><strong>The problem is that I don't know where this <code>name</code> comes from and I don't know what variable is being nil</strong>, so I can't debug properly (I tried to debug a log before asking here). Line 18 corresponds to the <code>@post.save</code> line in the following controller:</p> <p>PostsController:</p> <pre><code># ... def new @post = Post.new @form_html_options = (params[:post_type] == "image") ? { :multipart =&gt; true } : {} @form_partial = get_form_partial(params[:post_type]) redirect_to admin_posts_path, :alert =&gt; "You tried to create an unknown type of post..." if @form_partial.nil? @title = "Creating a new post..." end def create @post = Post.new(params[:post]) if @post.save flash[:success] = "Post created successfully!" redirect_to admin_post_path(@post) else @title = "Creating a new post..." @form_partial = get_form_partial(params[:post][:post_type]) render 'new' end end # ... </code></pre> <p>Here other files that might be needed to spot the problem:</p> <p>Post (model):</p> <pre><code>attr_accessible :title, :body, :user_id, :draft, :post_type, :image belongs_to :user mount_uploader :image_url, ImageUploader </code></pre> <p>ImageUploader:</p> <pre><code>class ImageUploader &lt; CarrierWave::Uploader::Base include CarrierWave::RMagick storage :fog def extension_white_list %w(jpg jpeg gif png) end end </code></pre> <p>new.html.erb:</p> <pre><code>&lt;h1&gt;&lt;%= @title %&gt;&lt;/h1&gt; &lt;%= form_for @post, :url =&gt; admin_posts_path, :html =&gt; @form_html_options do |f| %&gt; &lt;%= render 'form', :f =&gt; f %&gt; &lt;% end %&gt; </code></pre> <p>_form.html.erb:</p> <pre><code>&lt;%= render 'error_messages' %&gt; &lt;%= render @form_partial, :f =&gt; f %&gt; &lt;p class="drop-down"&gt; &lt;%= f.label :draft, 'Status' %&gt; &lt;%= f.select(:draft, options_for_select([["Published", 0], ["Draft", 1]], (@post.new_record? ? 0: @post.draft))) %&gt; &lt;/p&gt; &lt;%= f.hidden_field :user_id, :value =&gt; @post.user_id || current_user.id %&gt; &lt;%= f.hidden_field :post_type, :value =&gt; @post.post_type || params[:post_type] %&gt; &lt;p class="button"&gt;&lt;%= f.submit "Post", :disable_with =&gt; 'Posting...' %&gt;&lt;/p&gt; </code></pre> <p>_image_form.html.erb (<code>@form_partial</code>):</p> <pre><code>&lt;p&gt;&lt;%= f.file_field :image %&gt;&lt;/p&gt; </code></pre> <p>So what it really going on please?</p>
 

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