Expanded :method option in FormHelper#form_tag to allow for verbs other than GET and POST by automatically creating a hidden form field named _method, which will simulate the other verbs over post [DHH]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4371 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Expanded :method option in FormHelper#form_tag to allow for verbs other than GET and POST by automatically creating a hidden form field named _method, which will simulate the other verbs over post [DHH]
+
 * Added :method option to UrlHelper#link_to, which allows for using other verbs than GET for the link. This replaces the :post option, which is now deprecated. Example: link_to "Destroy", person_url(:id => person), :method => :delete [DHH]
 
 * follow_redirect doesn't complain about being redirected to the same controller. #5153 [dymo@mk.ukrtelecom.ua]

actionpack/lib/action_view/helpers/form_tag_helper.rb

@@ -14,12 +14,27 @@ module ActionView
       #
       # Options:
       # * <tt>:multipart</tt> - If set to true, the enctype is set to "multipart/form-data".
-      # * <tt>:method</tt> - The method to use when submitting the form, usually either "get" or "post".
+      # * <tt>:method</tt>    - The method to use when submitting the form, usually either "get" or "post".
+      #                         If "put", "delete", or another verb is used, a hidden input with name _method 
+      #                         is added to simulate the verb over post.
       def form_tag(url_for_options = {}, options = {}, *parameters_for_url, &proc)
-        html_options = { "method" => "post" }.merge(options.stringify_keys)
+        html_options = options.stringify_keys
         html_options["enctype"] = "multipart/form-data" if html_options.delete("multipart")
         html_options["action"] = url_for(url_for_options, *parameters_for_url)
-        tag :form, html_options, true
+        
+        method_tag = ""
+        
+        case method = html_options.delete("method")
+          when /^get$/i # must be case-insentive, but can't use downcase as might be nil
+            html_options["method"] = "get"
+          when /^post$/i, nil
+            html_options["method"] = "post"
+          else
+            html_options["method"] = "post"
+            method_tag = tag(:input, :type => "hidden", :name => "_method", :value => method)
+        end
+        
+        tag(:form, html_options, true) + method_tag
       end
 
       alias_method :start_form_tag, :form_tag

actionpack/test/template/form_helper_test.rb

@@ -239,6 +239,27 @@ class FormHelperTest < Test::Unit::TestCase
     assert_dom_equal expected, _erbout
   end
 
+  def test_form_for_with_method
+    _erbout = ''
+
+    form_for(:post, @post, :html => { :id => 'create-post', :method => :put }) do |f|
+      _erbout.concat f.text_field(:title)
+      _erbout.concat f.text_area(:body)
+      _erbout.concat f.check_box(:secret)
+    end
+
+    expected = 
+      "<form action='http://www.example.com' id='create-post' method='post'>" +
+      "<input name='_method' type='hidden' value='put' />" +
+      "<input name='post[title]' size='30' type='text' id='post_title' value='Hello World' />" +
+      "<textarea name='post[body]' id='post_body' rows='20' cols='40'>Back to the hill and over it again!</textarea>" +
+      "<input name='post[secret]' checked='checked' type='checkbox' id='post_secret' value='1' />" +
+      "<input name='post[secret]' type='hidden' value='0' />" +
+      "</form>"
+
+    assert_dom_equal expected, _erbout
+  end
+
   def test_form_for_without_object
     _erbout = ''
 

actionpack/test/template/form_tag_helper_test.rb

@@ -33,6 +33,12 @@ class FormTagHelperTest < Test::Unit::TestCase
     assert_dom_equal expected, actual
   end
 
+  def test_form_tag_with_method
+    actual = form_tag({}, { :method => :put })
+    expected = %(<form action="http://www.example.com" method="post"><input type="hidden" name="_method" value="put" />)
+    assert_dom_equal expected, actual
+  end
+
   def test_hidden_field_tag
     actual = hidden_field_tag "id", 3
     expected = %(<input id="id" name="id" type="hidden" value="3" />)