Add ability to render custom attributes from the controller

 Currently, all custom attributes are sliced from options
 when using the controller renderer, instead of forwarding
 it to the view helper, making it impossible to set a custom
 class name or id. This patch changes the behaviour to act
 more like render_component.

Author: Kai Wood

lib/react/rails/controller_renderer.rb

@@ -12,7 +12,7 @@ def initialize(options={})
 
   def call(name, options, &block)
     props = options.fetch(:props, {})
-    options = options.slice(:data, :tag).merge(prerender: true)
+    options = options.merge(prerender: true)
     react_component(name, props, options, &block)
   end
 end

test/dummy/app/controllers/server_controller.rb

@@ -16,6 +16,6 @@ def console_example_suppressed
   end
 
   def inline_component
-    render component: 'TodoList', props: { todos: ['Render this inline'] }, tag: 'span'
+    render component: 'TodoList', props: { todos: ['Render this inline'] }, tag: 'span', class: 'custom-class', id: 'custom-id'
   end
 end

test/server_rendered_html_test.rb

@@ -61,5 +61,8 @@ def wait_to_ensure_asset_pipeline_detects_changes
     assert_match(/<\/ul><\/span>/, rendered_html, "it accepts a tag override")
     # make sure that the layout is rendered with the component
     assert_match(/<title>Dummy<\/title>/, rendered_html)
+    # make sure that custom html attributes are rendered
+    assert_match(/class=\"custom-class\"/, rendered_html)
+    assert_match(/id=\"custom-id\"/, rendered_html)
   end
 end