Question

I keep getting a undefined method `model_name’ for NilClass:Class.

In the layout file: [application.html.erb]

    <section id="featured">
        <%= render 'subscribers/new' %>
    </section>

In the form partial: [views > subscribers > _new.html.erb]

    <%= form_for @subscriber, :url => subscribe_path do |f| %> [THIS LINE PRODUCES THE ERROR]
        <div class="field">
          <%= f.text_field :email %>
        </div>
        <div class="actions">
          <%= f.submit 'Add me to the list' %>
        </div>
    <% end %>

In the subscribers controller: [controllers > subscribers_controller.rb]

   def new
     @subscriber = Subscriber.new
   end

I’m a beginner at ROR, and I’ve looked around StackOverflow, but can’t find any answers for my specific case.

Answer 1

What path are you hitting when you are seeing this error?

If you are navigating to any path other than /subscribers/new then @subscriber will be nil and the form will throw the error that you are seeing. You are rendering a form via a partial in your view layout, that layout is rendered (presumably) throughout the app. Thus @subsriber won’t always be set.