Chaning user to form

app/controllers/users_controller.rb

@@ -10,7 +10,9 @@ class UsersController < ApplicationController
   end
 
   def update
-    current_user.update_attributes params[:user]
+    @user = User.find(params[:id])
+    @user.update_attributes(params[:user])
+
     head status: 200
   end
 end

app/views/users/show.html.haml

-.sheet
-  %button.close
-  %h2 Sir Lancelot
-  %h3 Character Sheet
-  %form
-    %fieldset
-      = find_and_preserve do
-        %textarea= @user.sheet
-      %input( type="Submit" value="Save" )
+%button.close
+%h2 Sir Lancelot
+%h3 Character Sheet
+= form_for @user do |form|
+  %fieldset
+    = find_and_preserve do
+      = form.text_area :sheet
+    %input( type="Submit" value="Save" )