#29 group_by Month
May 09, 2007 | 5 minutes | Active Support, Views
Learn how to use the very useful group_by method to group an array by anything you want! In this episode I group an array of tasks by month then sort it properly.
tasks_controller.rb
def index @tasks = Task.find(:all, :order => 'due_at, id', :limit => 50) @task_months = @tasks.group_by { |t| t.due_at.beginning_of_month } end
tasks/index.rhtml
<% @task_months.sort.each do |month, tasks| %> <h2><%= month.strftime('%B') %></h2> <% for task in tasks %> <div class="task"> <strong><%= task.name %></strong> due on <%= task.due_at.to_date.to_s(:long) %> </div> <% end %> <% end %>
