diff options
Diffstat (limited to 'railties/guides/source/getting_started.textile')
| -rw-r--r-- | railties/guides/source/getting_started.textile | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/railties/guides/source/getting_started.textile b/railties/guides/source/getting_started.textile index 902b7353c0..e371632d87 100644 --- a/railties/guides/source/getting_started.textile +++ b/railties/guides/source/getting_started.textile @@ -811,6 +811,8 @@ class CreateComments < ActiveRecord::Migration t.timestamps end + + add_index :comments, :post_id end def self.down @@ -819,7 +821,7 @@ class CreateComments < ActiveRecord::Migration end </ruby> -The +t.references+ line sets up a foreign key column for the association between the two models. Go ahead and run the migration: +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: <shell> $ rake db:migrate |