diff options
Diffstat (limited to 'actionpack/lib/action_view/partials.rb')
| -rw-r--r-- | actionpack/lib/action_view/partials.rb | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/actionpack/lib/action_view/partials.rb b/actionpack/lib/action_view/partials.rb index 844c3e9572..56c661c00c 100644 --- a/actionpack/lib/action_view/partials.rb +++ b/actionpack/lib/action_view/partials.rb @@ -12,19 +12,19 @@ module ActionView # # <%= render :partial => "account" %> # - # This would render "advertiser/_account.erb" and pass the instance variable @account in as a local variable + # This would render "advertiser/_account.html.erb" and pass the instance variable @account in as a local variable # +account+ to the template for display. # # In another template for Advertiser#buy, we could have: # # <%= render :partial => "account", :locals => { :account => @buyer } %> # - # <% for ad in @advertisements %> + # <% @advertisements.each do |ad| %> # <%= render :partial => "ad", :locals => { :ad => ad } %> # <% end %> # - # This would first render "advertiser/_account.erb" with @buyer passed in as the local variable +account+, then - # render "advertiser/_ad.erb" and pass the local variable +ad+ to the template for display. + # This would first render "advertiser/_account.html.erb" with @buyer passed in as the local variable +account+, then + # render "advertiser/_ad.html.erb" and pass the local variable +ad+ to the template for display. # # == The :as and :object options # @@ -44,12 +44,12 @@ module ActionView # # The <tt>:object</tt> option can be used to directly specify which object is rendered into the partial; # useful when the template's object is elsewhere, in a different ivar or in a local variable for instance. - # + # # Revisiting a previous example we could have written this code: - # + # # <%= render :partial => "account", :object => @buyer %> # - # <% for ad in @advertisements %> + # <% @advertisements.each do |ad| %> # <%= render :partial => "ad", :object => ad %> # <% end %> # @@ -64,17 +64,22 @@ module ActionView # # <%= render :partial => "ad", :collection => @advertisements %> # - # This will render "advertiser/_ad.erb" and pass the local variable +ad+ to the template for display. An + # This will render "advertiser/_ad.html.erb" and pass the local variable +ad+ to the template for display. An # iteration counter will automatically be made available to the template with a name of the form # +partial_name_counter+. In the case of the example above, the template would be fed +ad_counter+. # # The <tt>:as</tt> option may be used when rendering partials. - # + # # You can specify a partial to be rendered between elements via the <tt>:spacer_template</tt> option. # The following example will render <tt>advertiser/_ad_divider.html.erb</tt> between each ad partial: # # <%= render :partial => "ad", :collection => @advertisements, :spacer_template => "ad_divider" %> # + # If the given <tt>:collection</tt> is nil or empty, <tt>render</tt> will return nil. This will allow you + # to specify a text which will displayed instead by using this form: + # + # <%= render(:partial => "ad", :collection => @advertisements) || "There's no ad to be displayed" %> + # # NOTE: Due to backwards compatibility concerns, the collection can't be one of hashes. Normally you'd also # just keep domain objects, like Active Records, in there. # @@ -84,7 +89,7 @@ module ActionView # # <%= render :partial => "advertisement/ad", :locals => { :ad => @advertisement } %> # - # This will render the partial "advertisement/_ad.erb" regardless of which controller this is being called from. + # This will render the partial "advertisement/_ad.html.erb" regardless of which controller this is being called from. # # == Rendering objects with the RecordIdentifier # |