Added observe_form

actionpack/lib/action_view/helpers/ajax_helper.rb

@@ -74,6 +74,14 @@ def observe_field(name, options = {})
         script_decorator(attributes)
       end
 
+      def observe_form(name, options = {})
+        options[:observed] = name
+        attributes = extract_observer_attributes!(options)
+        attributes["data-js-type"] = "form_observer"
+
+        script_decorator(attributes)
+      end
+
       def script_decorator(options)
         attributes = %w(type="application/json")
         attributes += options.map{|k, v| k + '="' + v.to_s + '"'}

actionpack/test/javascript/ajax_test.rb

@@ -392,17 +392,17 @@ def field(options = {})
 
   test "using a url string" do
     assert_html field(:url => "/some/other/url"),
-      %w(script data-url="/some/other/url" data-observed="title")
+      %w(script data-js-type="field_observer" data-url="/some/other/url" data-observed="title")
   end
 
   test "using a url hash" do
     assert_html field(:url => {:controller => :blog, :action => :update}),
-      %w(script data-url="/url/hash" data-observed="title")
+      %w(script data-js-type="field_observer" data-url="/url/hash" data-observed="title")
   end
 
   test "using a :frequency option" do
     assert_html field(:url => { :controller => :blog }, :frequency => 5.minutes),
-      %w(script data-url="/url/hash" data-observed="title" data-frequency="300")
+      %w(script data-js-type="field_observer" data-url="/url/hash" data-observed="title" data-frequency="300")
   end
 
   test "using a :frequency option of 0" do
@@ -411,26 +411,33 @@ def field(options = {})
 
   test "observe field with common options" do
     assert_html observe_field("glass", :frequency => 5.minutes, :url => { :action => "reorder_if_empty" }),
-      %w(script data-observed="glass" data-frequency="300" data-url="/url/hash")
+      %w(script data-js-type="field_observer" data-observed="glass" data-frequency="300" data-url="/url/hash")
   end
 
   # TODO: Consider using JSON instead of strings.  Is using 'value' as a magical reference to the value of the observed field weird? (Rails2 does this) - BR
   test "using a :with option" do
     assert_html field(:with => "foo"),
-      %w(script data-observed="title" data-with="'foo=' + encodeURIComponent(value)")
+      %w(script data-js-type="field_observer" data-observed="title" data-with="'foo=' + encodeURIComponent(value)")
 
     assert_html field(:with => "'foo=' + encodeURIComponent(value)"),
-      %w(script data-observed="title" data-with="'foo=' + encodeURIComponent(value)")
+      %w(script data-js-type="field_observer" data-observed="title" data-with="'foo=' + encodeURIComponent(value)")
   end
 
   test "using json in a :with option" do
     assert_html field(:with => "{'id':value}"),
-      %w(script data-observed="title" data-with="{'id':value}")
+      %w(script data-js-type="field_observer" data-observed="title" data-with="{'id':value}")
   end
 
   test "using :function for callback" do
     assert_html field(:function => "alert('Element changed')"),
-      %w(script data-observer-code="function(element, value) {alert('Element changed')}")
+      %w(script data-js-type="field_observer" data-observer-code="function(element, value) {alert('Element changed')}")
+  end
+end
+
+class ObserveFormTest < AjaxTestCase
+  test "basic" do
+    assert_html observe_form("some_form", :frequency => 2, :url => { :action => "hash" }),
+      %w(script data-js-type="form_observer" data-url="/url/hash" data-observed="some_form" data-frequency="2")
   end
 end