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Update CreateComments migration to reflect the output from Rails 4.

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This commit is contained in:
Douglas Teoh 2013-05-04 18:00:26 +10:00
parent 757e985c6f
commit 092b952d47
1 changed files with 5 additions and 9 deletions
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14
guides/source/getting_started.md
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@ -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