raph

raph.rb

# /waiters/tables_calling.json
# in the controller
#
# you want an array of table IDs as the output
def tables_calling
  calling = []
  @tables.where(calling: true).each do |table|
    calling << table.id
  end

  respond_to do |format|
    format.json {
      render json: calling
    }
  end
end




# in your view
<div id='table-<%= table.id %>' class='table'>
</div>


# in your javascript

function updateTables() {
  $.getJSON('/waiters/tables_calling.json', function (data) {
    $('.table').removeClass('calling')
    for tableNumber in data {
      $('#table-' + tableNumber).addClass('calling')
    }
  });
}

window.setTimeout(updateTables, 5000);