undefined method `model_name' for Project:Class

if Project is not an active record subclass, you need these and you can use form_for

class Project
  extend ActiveModel::Naming
  include ActiveModel::Conversion
  def persisted?
    false
  end
  ...
end

view:

<%= form_for(@newproject)  do |f| %>
  <%= f.label :name %>:
  <%= f.text_field :description %><br />
<% end %>

class Project < ActiveRecord::Base

just for the record - here is the Railscast for that issue:

http://railscasts.com/episodes/219-active-model

Related