Added FormHelper#file_field and FormTagHelper#file_field_tag for creating file upload fields

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@750 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Added FormHelper#file_field and FormTagHelper#file_field_tag for creating file upload fields
+
 * Added :order option for date_select that allows control over the order in which the date dropdowns is used and which of them should be used #619 [Tim Bates]. Examples:
 
     date_select("post", "written_on", :order => [:day, :month, :year])

actionpack/lib/action_view/helpers/form_helper.rb

@@ -78,6 +78,11 @@ module ActionView
         InstanceTag.new(object, method, self).to_input_field_tag("hidden", options)
       end
 
+      # Works just like text_field, but returns a input tag of the "file" type instead, which won't have any default value.
+      def file_field(object, method, options = {})
+        InstanceTag.new(object, method, self).to_input_field_tag("file", options)
+      end
+
       # Returns a textarea opening and closing tag set tailored for accessing a specified attribute (identified by +method+)
       # on an object assigned to the template (identified by +object+). Additional options on the input tag can be passed as a
       # hash with +options+.
@@ -147,7 +152,7 @@ module ActionView
         html_options.merge!({ "size" => options["maxlength"]}) if options["maxlength"] && !options["size"]
         html_options.delete("size") if field_type == "hidden"
         html_options.merge!({ "type" =>  field_type})
-        html_options.merge!({ "value" => value_before_type_cast }) unless options["value"]
+        html_options.merge!({ "value" => value_before_type_cast }) if options["value"].nil? || field_type == "file"
         add_default_name_and_id(html_options)
         tag("input", html_options)
       end

actionpack/lib/action_view/helpers/form_tag_helper.rb

@@ -43,6 +43,10 @@ module ActionView
         text_field_tag(name, value, options.update("type" => "hidden"))
       end
 
+      def file_field_tag(name, options = {})
+        text_field_tag(name, nil, options.update("type" => "file"))
+      end
+
       def password_field_tag(name = "password", value = nil, options = {})
         text_field_tag(name, value, options.update("type" => "password"))
       end