Introducing the session_migration generator. Creates an add_session_table migration. References #2958.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3098 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

3 files changed, 43 insertions, 0 deletions

diff --git a/railties/lib/rails_generator/generators/components/session_migration/USAGE b/railties/lib/rails_generator/generators/components/session_migration/USAGE
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+++ b/railties/lib/rails_generator/generators/components/session_migration/USAGE
@@ -0,0 +1,15 @@
+Description:
+    The session table migration generator creates a migration for adding a session table 
+    used by CGI::Session::ActiveRecordStore.
+
+    The generator takes a migration name as its argument.  The migration name may be
+    given in CamelCase or under_score.
+
+    The generator creates a migration class in db/migrate prefixed by its number
+    in the queue.
+
+Example:
+    ./script/generate session_migration AddSessionTable
+
+    With 4 existing migrations, this will create an AddSessionTable migration in the
+    file db/migrate/5_add_session_table.rb
\ No newline at end of file
diff --git a/railties/lib/rails_generator/generators/components/session_migration/session_migration_generator.rb b/railties/lib/rails_generator/generators/components/session_migration/session_migration_generator.rb
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+++ b/railties/lib/rails_generator/generators/components/session_migration/session_migration_generator.rb
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+class SessionMigrationGenerator < Rails::Generator::NamedBase
+  def initialize(runtime_args, runtime_options = {})
+    runtime_args << 'add_session_table' if runtime_args.empty?
+    super
+  end
+
+  def manifest
+    record do |m|
+      m.directory 'db/migrate'
+      m.migration_template 'migration.rb', 'db/migrate'
+    end
+  end
+end
diff --git a/railties/lib/rails_generator/generators/components/session_migration/templates/migration.rb b/railties/lib/rails_generator/generators/components/session_migration/templates/migration.rb
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+++ b/railties/lib/rails_generator/generators/components/session_migration/templates/migration.rb
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+class <%= class_name %> < ActiveRecord::Migration
+  def self.up
+    create_table :sessions do |t|
+      t.column :session_id, :string
+      t.column :data, :text
+      t.column :updated_at, :datetime
+    end
+    
+    add_index :sessions, :session_id
+  end
+
+  def self.down
+    drop_table :sessions
+  end
+end