Main menu generated from database

Rails
1

Hello,

I’d like to have the main menu of my web application dynamically
generated from categories stored in a database.

I created a partial for this menu:
(views/category/_list.html.erb)

    <% @categories.each do |category| %>
  • <%= category.name %>
    • <% end %>

And I call this partial in the main layout:
(layouts/application.html.erb):

<%= render ‘category/list’ %>

Unfortunately, the @categories variable is Nil because the category/list
controller is not called with this method.

How can I simply achieve this ? Thank you,

Fabrice

2

On 1 March 2011 08:44, Fabrice F. [email protected] wrote:

  • <%= category.name %>
    • controller is not called with this method.

    How can I simply achieve this ? Thank you,

    In your application_controller put a before_filter that sets up
    @categories. This will then be setup for all controllers and actions.
    You might want to use a different name such as @categories_for_menu
    or something so that it does not clash with other uses of the variable
    @categories.

    Colin

    3

    I’d also recommend you cache the results so every page is not making a
    DB call every time.

    Brian

    4

    Thank you for your answer and your advice, that’s what I was looking
    for,

    Sincerely,

    Fabrice