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