Rails 3, HowTo - Pass a Setting to the Application.html.erb

rubyonrails-talk
1

Most of my views will required a wrapper of padding 10px, but a few will not...

I was thinking of doing something like this in the view controller:

     respond_to do |format|        format.html { render :layout => true, :padding => 'false' }

And then in the application.html.erb have an IF to not add a padding class if :padding is false... But the above idea doesn't work, the variable padding is not being passed.

Any ideas? Or cleaner/smart solutions? thxs

2

Try doing this in your controller: @padding = false

Then in your view you can test it like this: <% if @padding %> //do stuff here <% end %>

I found it pretty helpful to work through this:

Luke

3

In my opinion you should have 2 layouts. * application, * padding.

The `padding' layout should be nested inside application and (according to its name) add some padding :-). Look here about how to do it in rails 2 and 3: https://rails.lighthouseapp.com/projects/8994/tickets/5305-rails3-rc-named-yield-should-return-nil-when-content_for-with-that-name-was-not-called

With that you could setup layout per every action.

layout :application layout :padding, :only => [:new].

The second way of doing this:

Add one more stylesheet in every view that needs padding:

#application.html.erb layout

<head>   <%= yield :head %> </head>

#new.html.erb content_for(:head) do   stylesheet_link_tag 'padding' end

You could abstract it into helper method and use as simple as: #new.html.erb <%= padding() %>

Third way is to create helper that would be used this way:

<%= padding do %>   create your content here <% end %>

I wouldn't bother controller with such a minor change in view layer so I prefere keeping padding in views instead changing layout on the controller side.

Robert Pankowecki

4

Or you could add something like

<body class="<%= yield(:body_class) %>">   … your stuff </body>

and set a conditional css class which can handle the padding. Set the class with content_for()