From 35973b9a6e8514034f1a3350fce3f55744f11911 Mon Sep 17 00:00:00 2001
From: Mike Dillon <mike@appropriate.io>
Date: Tue, 24 May 2016 10:04:06 -0700
Subject: [PATCH] Document permitted_attributes_for_#{action}

---
 README.md | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/README.md b/README.md
index 8078769..5f516c9 100644
--- a/README.md
+++ b/README.md
@@ -597,6 +597,23 @@ class PostsController < ApplicationController
 end
 ```
 
+If you want to permit different attributes based on the current action, you can define a `permitted_attributes_for_#{action}` method on your policy:
+
+```ruby
+# app/policies/post_policy.rb
+class PostPolicy < ApplicationPolicy
+  def permitted_attributes_for_create
+    [:title, :body]
+  end
+
+  def permitted_attributes_for_edit
+    [:body]
+  end
+end
+```
+
+If you have defined an action-specific method on your policy for the current action, the `permitted_attributes` helper will call it instead of calling `permitted_attributes` on your controller.
+
 ## RSpec
 
 ### Policy Specs