Update CreateComments migration to reflect the output from Rails 4.

1 files changed, 5 insertions, 9 deletions

diff --git a/guides/source/getting_started.md b/guides/source/getting_started.md
index 43bcbc9f42..599e47949d 100644
--- a/guides/source/getting_started.md
+++ b/guides/source/getting_started.md
@@ -1148,19 +1148,17 @@ class CreateComments < ActiveRecord::Migration
     create_table :comments do |t|
       t.string :commenter
       t.text :body
-      t.references :post
+      t.references :post, index: true
 
       t.timestamps
     end
-
-    add_index :comments, :post_id
   end
 end
 ```
 
 The `t.references` line sets up a foreign key column for the association between
-the two models. And the `add_index` line sets up an index for this association
-column. Go ahead and run the migration:
+the two models. An index for this association is also created on this column.
+Go ahead and run the migration:
 
 ```bash
 $ rake db:migrate
@@ -1172,10 +1170,8 @@ run against the current database, so in this case you will just see:
 ```bash
 ==  CreateComments: migrating =================================================
 -- create_table(:comments)
-   -> 0.0008s
--- add_index(:comments, :post_id)
-   -> 0.0003s
-==  CreateComments: migrated (0.0012s) ========================================
+   -> 0.0115s
+==  CreateComments: migrated (0.0119s) ========================================
 ```
 
 ### Associating Models