diff options
Diffstat (limited to 'guides/source/migrations.textile')
| -rw-r--r-- | guides/source/migrations.textile | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/guides/source/migrations.textile b/guides/source/migrations.textile index a565974227..0405f45fa8 100644 --- a/guides/source/migrations.textile +++ b/guides/source/migrations.textile @@ -51,7 +51,7 @@ end This migration adds a table called +products+ with a string column called +name+ and a text column called +description+. A primary key column called +id+ will -also be added, however since this is the default we do not need to explicitly write for this. +also be added, however since this is the default we do not need to explicitly specify it. The timestamp columns +created_at+ and +updated_at+ which Active Record populates automatically will also be added. Reversing this migration is as simple as dropping the table. @@ -65,7 +65,7 @@ class AddReceiveNewsletterToUsers < ActiveRecord::Migration change_table :users do |t| t.boolean :receive_newsletter, :default => false end - User.update_all :receive_newsletter => true + User.update_all :receive_newsletter => true end def down @@ -636,9 +636,8 @@ $ rake db:migrate:up VERSION=20080906120000 </shell> will run the +up+ method from the 20080906120000 migration. This task will first -check whether the migration is already performed, so for example - +db:migrate:up VERSION=20080906120000+ will do nothing if Active Record believes - that 20080906120000 has already been run. +check whether the migration is already performed and will do nothing if Active Record believes +that it has already been run. h4. Changing the output of running migrations |