Use attribute pairs instead of the migration name to create add and remove column migrations. Closes #9166 [lifofifo]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@7422 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

1 files changed, 12 insertions, 7 deletions

diff --git a/railties/lib/rails_generator/generators/components/migration/USAGE b/railties/lib/rails_generator/generators/components/migration/USAGE
index c3f8ce0987..3e914a5d7b 100644
--- a/railties/lib/rails_generator/generators/components/migration/USAGE
+++ b/railties/lib/rails_generator/generators/components/migration/USAGE
@@ -1,10 +1,11 @@
 Description:
     Stubs out a new database migration. Pass the migration name, either
-    CamelCased or under_scored, as an argument. A migration class is generated
-    in db/migrate prefixed by the latest migration number.
+    CamelCased or under_scored, and an optional list of attribute pairs as arguments.
+
+    A migration class is generated in db/migrate prefixed by the latest migration number.
 
     You can name your migration in either of these formats to generate add/remove
-    column lines: AddColumnToTable or RemoveColumnFromTable
+    column lines from supplied attributes: AddColumnsToTable or RemoveColumnsFromTable
 
 Example:
     `./script/generate migration AddSslFlag`
@@ -12,13 +13,17 @@ Example:
     With 4 existing migrations, this creates the AddSslFlag migration in
     db/migrate/005_add_ssl_flag.rb
 
-    `./script/generate migration AddSslFlagToAccount`
+    `./script/generate migration AddTitleBodyToPost title:string body:text published:boolean`
     
-    This will create the AddSslFlagToAccount in db/migrate/005_add_ssl_flag_to_account.rb with
+    This will create the AddTitleBodyToPost in db/migrate/005_add_title_body_to_post.rb with
     this in the Up migration:
 
-      add_column :accounts, :ssl_flag, :type, :null => :no?, :default => :maybe?
+      add_column :posts, :title, :string  
+      add_column :posts, :body, :text  
+      add_column :posts, :published, :boolean
 
     And this in the Down migration:
     
-      remove_column :accounts, :ssl_flag
\ No newline at end of file
+      remove_column :posts, :published  
+      remove_column :posts, :body  
+      remove_column :posts, :title