title: When I run the rake:db migrate command I get an error "Uninitialized constant CreateArticles"
body: <p>I created a model ruby script/generate model Article (simple enuff)</p>
  
  <p>Here is the migration file create_articles.rb:</p>
  
  <pre><code>def self.up
    create_table :articles do |t|
      t.column :user_id, :integer
      t.column :title, :string
      t.column :synopsis, :text, :limit =&gt; 1000
      t.column :body, :text, :limit =&gt; 20000
      t.column :published, :boolean, :default =&gt; false
      t.column :created_at, :datetime
      t.column :updated_at, :datetime
      t.column :published_at, :datetime
      t.column :category_id, :integer
    end
  
  def self.down
    drop_table :articles
   end
  end
  </code></pre>
  
  <p>When I run the rake:db migrate command I receive an error rake aborted! "Uninitialized constant CreateArticles."  </p>
  
  <p>Does anyone know why this error keeps happening? </p>