"ruby-identifier">columns</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-constant">ActiveRecord</span><span class="ruby-operator">::</span><span class="ruby-constant">ConnectionAdapters</span><span class="ruby-operator">::</span><span class="ruby-constant">Column</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">name</span>.<span class="ruby-identifier">to_s</span>, <span class="ruby-identifier">default</span>,
                                               