Question

Migrating app from php. and have this in the view:

<%=render :partial => "jt-test", :locals => {:info => "here is my info", :hide_location=>true} %>
<br /><br />
<%=render :partial => "jt-test", :locals => {:info => "here is my info"} %>

in _jt-test.html.erb:

My info:<br /> 
<%=info %>

<% if local_assigns.has_key? :hide_location %>
    you want to hide location!
<% end %>

Is the local_assigns the proper / best way to do this? Can I have an unlimited number of local_assigns? Is there a local_assigns for the main view called from the controller?

thx

Answer 1

In the main view you’d just use normal action class variables (@whatever_variable_name), and they’re assigned in the controller:

class FoosController
  def index
    @foos = Foo.all
  end
end

# template
<% @foos.each |foo| %>
    <%= foo.name %>

You may have unlimited locals in a partial, but if there are a “lot”, you might be doing it wrong. consider using an encapsulating object, breaking up the template more, etc.

Rails exposes local variables to partials by their name (info and hide_location in your case). You don’t need to look it up using has_key?. See the passing local variables docs in the layout and rendering guide.