Sortable Headers

_sortable_header

3 files to add sorting to table headers.

index.html.erb

<th><%= sortable_header(:title) %></th>
<th><%= sortable_header(:description) %></th>
<th><%= sortable_header(:status) %></th>
<th><%= sortable_header(:comments_count, 'Comments') %></th>

projects_controller.rb

  def index
    @projects = Project.order(sort_column => sort_direction)
  end

private

  def sort_column
    Project.column_names.include?(params[:sort]) ? params[:sort] : "title"
  end
  helper_method :sort_column

  def sort_direction
    (['asc', 'desc'].include?(params[:direction]) ? params[:direction] : "asc").to_sym
  end
  helper_method :sort_direction

projects_helper.rb

  def sortable_header (column, title = nil)
    title ||= column.titleize
    css_class = column == sort_column ? "current #{sort_direction}" : nil
    direction = column == sort_column && sort_direction == "asc" ? "desc" : "asc"
    link_to title, {sort: column, direction: direction}
  end