fix issue #11605

actionpack/CHANGELOG.md

@@ -1,5 +1,10 @@
 ## unreleased ##
 
+*   Fix to render partial by context(#11605).
+
+    *Kassio Borges*
+
+
 *   Fix `ActionDispatch::Assertions::ResponseAssertions#assert_redirected_to`
     does not show user-supplied message.
 

actionpack/lib/action_view/lookup_context.rb

@@ -103,7 +103,7 @@ module ActionView
 
     # Helpers related to template lookup using the lookup context information.
     module ViewPaths
-      attr_reader :view_paths, :html_fallback_for_js
+      attr_reader :view_paths
 
       # Whenever setting view paths, makes a copy so we can manipulate then in
       # instance objects as we wish.
@@ -200,10 +200,7 @@ module ActionView
     def formats=(values)
       if values
         values.concat(default_formats) if values.delete "*/*"
-        if values == [:js]
-          values << :html
-          @html_fallback_for_js = true
-        end
+        values << :html if values == [:js]
       end
       super(values)
     end

actionpack/lib/action_view/renderer/abstract_renderer.rb

@@ -37,11 +37,5 @@ module ActionView
     def instrument(name, options={})
       ActiveSupport::Notifications.instrument("render_#{name}.action_view", options){ yield }
     end
-
-    def prepend_formats(formats)
-      formats = Array(formats)
-      return if formats.empty? || @lookup_context.html_fallback_for_js
-      @lookup_context.formats = formats | @lookup_context.formats
-    end
   end
 end

actionpack/lib/action_view/renderer/partial_renderer.rb

@@ -281,8 +281,6 @@ module ActionView
       @block   = block
       @details = extract_details(options)
 
-      prepend_formats(options[:formats])
-
       if String === partial
         @object     = options[:object]
         @path       = partial

actionpack/lib/action_view/renderer/template_renderer.rb

@@ -10,10 +10,9 @@ module ActionView
       template = determine_template(options)
       context  = @lookup_context
 
-      prepend_formats(template.formats)
-
       unless context.rendered_format
-        context.rendered_format = template.formats.first || formats.last
+        context.formats = template.formats unless template.formats.empty?
+        context.rendered_format = context.formats.first
       end
 
       render_template(template, options[:layout], options[:locals])

actionpack/test/fixtures/test/_changing_priority.html.erb

@@ -1 +0,0 @@
-HTML

actionpack/test/fixtures/test/_changing_priority.json.erb

@@ -1 +0,0 @@
-JSON

actionpack/test/fixtures/test/_first_json_partial.json.erb

@@ -1 +0,0 @@
-<%= render :partial => "test/second_json_partial" %>

actionpack/test/fixtures/test/_second_json_partial.json.erb

@@ -1 +0,0 @@
-Third level

actionpack/test/fixtures/test/html_template.html.erb

@@ -1 +0,0 @@
-<%= render :partial => "test/first_json_partial", :formats => :json %>

actionpack/test/template/render_test.rb

@@ -54,16 +54,6 @@ module RenderTestCases
     assert_equal "Hello world", @view.render(:template => "test/one", :formats => [:html])
   end
 
-  def test_render_partial_implicitly_use_format_of_the_rendered_partial
-    @view.lookup_context.formats = [:html]
-    assert_equal "Third level", @view.render(:template => "test/html_template")
-  end
-
-  def test_render_partial_use_last_prepended_format_for_partials_with_the_same_names
-    @view.lookup_context.formats = [:html]
-    assert_equal "\nHTML Template, but JSON partial", @view.render(:template => "test/change_priority")
-  end
-
   def test_render_template_with_a_missing_partial_of_another_format
     @view.lookup_context.formats = [:html]
     assert_raise ActionView::Template::Error, "Missing partial /missing with {:locale=>[:en], :formats=>[:json], :handlers=>[:erb, :builder]}" do
@@ -71,6 +61,13 @@ module RenderTestCases
     end
   end
 
+  def test_render_using_context_format_as_default
+    @view.lookup_context.formats = [:html]
+    assert_equal "partial html", @view.render('test/partial')
+    assert_equal "partial js", @view.render(:partial => 'test/partial', :formats => :js)
+    assert_equal "partial html", @view.render('test/partial')
+  end
+
   def test_render_file_with_locale
     assert_equal "<h1>Kein Kommentar</h1>", @view.render(:file => "comments/empty", :locale => [:de])
     assert_equal "<h1>Kein Kommentar</h1>", @view.render(:file => "comments/empty", :locale => :de)