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# See http://doc.gitlab.com/ce/development/migration_style_guide.html
# for more information on how to write migrations for GitLab.
class DropEventsForMigrationTable < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers
DOWNTIME = false
disable_ddl_transaction!
class Event < ActiveRecord::Base
include EachBatch
end
def up
transaction do
drop_table :events_for_migration
end
end
def down
create_table :events_for_migration do |t|
t.string :target_type, index: true
t.integer :target_id, index: true
t.string :title
t.text :data
t.integer :project_id
t.datetime :created_at, index: true
t.datetime :updated_at
t.integer :action, index: true
t.integer :author_id, index: true
t.index [:project_id, :id]
end
Event.all.each_batch do |relation|
start_id, stop_id = relation.pluck('MIN(id), MAX(id)').first
execute <<-EOF.strip_heredoc
INSERT INTO events_for_migration (target_type, target_id, project_id, created_at, updated_at, action, author_id)
SELECT target_type, target_id, project_id, created_at, updated_at, action, author_id
FROM events
WHERE id BETWEEN #{start_id} AND #{stop_id}
EOF
end
end
end
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