Add config.default_method_for_update to support PATCH

PATCH is the correct HTML verb to map to the #update action. The
semantics for PATCH allows for partial updates, whereas PUT requires a
complete replacement.

Changes:
* adds config.default_method_for_update you can set to :patch
* optionally use PATCH instead of PUT in resource routes and forms
* adds the #patch verb to routes to detect PATCH requests
* adds #patch? to Request
* changes documentation and comments to indicate support for PATCH

This change maintains complete backwards compatibility by keeping :put
as the default for config.default_method_for_update.

1 files changed, 3 insertions, 3 deletions

diff --git a/railties/lib/rails/generators/active_model.rb b/railties/lib/rails/generators/active_model.rb
index 4b828340d2..f51028b657 100644
--- a/railties/lib/rails/generators/active_model.rb
+++ b/railties/lib/rails/generators/active_model.rb
@@ -37,7 +37,7 @@ module Rails
 
       # GET show
       # GET edit
-      # PUT update
+      # PUT/PATCH update
       # DELETE destroy
       def self.find(klass, params=nil)
         "#{klass}.find(#{params})"
@@ -58,13 +58,13 @@ module Rails
         "#{name}.save"
       end
 
-      # PUT update
+      # PUT/PATCH update
       def update_attributes(params=nil)
         "#{name}.update_attributes(#{params})"
       end
 
       # POST create
-      # PUT update
+      # PUT/PATCH update
       def errors
         "#{name}.errors"
       end