gitlabhq/app/views/merge_requests/_form.html.haml

%div.merge-request-form-holder
  .ui-box.width-100p
    %h3
      = @merge_request.new_record? ? "New Merge Request" : "Edit Merge Request ##{@merge_request.id}"
    = form_for [@project, @merge_request] do |f|
      .data
        %table.no-borders
          -if @merge_request.errors.any?
            %tr 
              %td Errors
              %td
                #error_explanation
                  - @merge_request.errors.full_messages.each do |msg|
                    %span= msg
                    %br

          %tr
            %td= f.label :title
            %td= f.text_field :title
          %tr
            %td= f.label :source_branch, "From"
            %td= f.select(:source_branch, @project.heads.map(&:name), { :include_blank => "Select branch" })
          %tr
            %td= f.label :target_branch, "To"
            %td= f.select(:target_branch, @project.heads.map(&:name), { :include_blank => "Select branch" })
          %tr
            %td= f.label :assignee_id, "Assign to"
            %td= f.select(:assignee_id, @project.users.all.collect {|p| [ p.name, p.id ] }, { :include_blank => "Select user" })
      .buttons
        = f.submit 'Save', :class => "grey-button"
        .right= link_to 'Back', project_merge_requests_path(@project), :class => "grey-button"

:javascript
  $(function(){
    $('select#merge_request_assignee_id').chosen();
    $('select#merge_request_source_branch').chosen();
    $('select#merge_request_target_branch').chosen();
  });