Controllers with acronyms in their names (e.g. PDFController) require the...

Controllers with acronyms in their names (e.g. PDFController) require the correct default helper (PDFHelper in file pdf_helper.rb).  Closes #2262.  Do not raise an exception when default helper is missing; log a debug message instead.  It's nice to delete empty helpers.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@2938 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/CHANGELOG

+*SVN*
+
+* Do not raise an exception when default helper is missing; log a debug message instead.  It's nice to delete empty helpers.  [Jeremy Kemper]
+
+* Controllers with acronyms in their names (e.g. PDFController) require the correct default helper (PDFHelper in file pdf_helper.rb).  #2262 [jeff@opendbms.com]
+
+
 *1.11.0* (November 7th, 2005)
 
 * Added request as instance method to views, so you can do <%= request.env["HTTP_REFERER"] %>, just like you can already access response, session, and the likes [DHH]

actionpack/lib/action_controller/helpers.rb

@@ -108,12 +108,23 @@ def helper_attr(*attrs)
       end
 
       private 
+        def default_helper_module!
+          module_name = name.sub(/^Controllers::/, '').sub(/Controller$|$/, 'Helper')
+          module_path = module_name.split('::').map { |m| m.underscore }.join('/')
+          require_dependency module_path
+          helper module_name.constantize
+        rescue LoadError
+          logger.debug("#{name}: missing default helper path #{module_path}") if logger
+        rescue NameError
+          logger.debug("#{name}: missing default helper module #{module_name}") if logger
+        end
+
         def inherited_with_helper(child)
           inherited_without_helper(child)
           begin
             child.master_helper_module = Module.new
             child.master_helper_module.send :include, master_helper_module
-            child.helper child.controller_path
+            child.send :default_helper_module!
           rescue MissingSourceFile => e
             raise unless e.is_missing?("helpers/#{child.controller_path}_helper")
           end

actionpack/test/controller/helper_test.rb

@@ -14,6 +14,14 @@ def render_hello_world
 
     def rescue_action(e) raise end
   end
+
+  class PDFController < ActionController::Base
+    def test
+      render :inline => "test: <%= foobar %>"
+    end
+
+    def rescue_action(e) raise end
+  end
 end
 
 module LocalAbcHelper
@@ -100,11 +108,19 @@ def test_helper_attr
   end
 
   def test_helper_for_nested_controller
-    @request    = ActionController::TestRequest.new
-    @response   = ActionController::TestResponse.new
-    @request.action = "render_hello_world"
-    
-    assert_equal "hello: Iz guuut!", Fun::GamesController.process(@request, @response).body
+    request  = ActionController::TestRequest.new
+    response = ActionController::TestResponse.new
+    request.action = 'render_hello_world'
+
+    assert_equal 'hello: Iz guuut!', Fun::GamesController.process(request, response).body
+  end
+
+  def test_helper_for_acronym_controller
+    request  = ActionController::TestRequest.new
+    response = ActionController::TestResponse.new
+    request.action = 'test'
+
+    assert_equal 'test: baz', Fun::PDFController.process(request, response).body
   end
 
   private

actionpack/test/fixtures/helpers/fun/pdf_helper.rb

+module Fun::PDFHelper
+  def foobar() 'baz' end
+end