52 lines
1.5 KiB
Ruby
52 lines
1.5 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 PrepareEventsTableForPushEventsMigration < ActiveRecord::Migration[4.2]
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include Gitlab::Database::MigrationHelpers
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# Set this constant to true if this migration requires downtime.
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DOWNTIME = false
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disable_ddl_transaction!
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def up
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# The order of these columns is deliberate and results in the following
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# columns and sizes:
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#
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# * id (4 bytes)
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# * project_id (4 bytes)
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# * author_id (4 bytes)
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# * target_id (4 bytes)
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# * created_at (8 bytes)
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# * updated_at (8 bytes)
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# * action (2 bytes)
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# * target_type (variable)
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#
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# Unfortunately we can't make the "id" column a bigint/bigserial as Rails 4
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# does not support this properly.
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create_table :events_for_migration do |t|
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t.references :project,
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index: true,
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foreign_key: { on_delete: :cascade }
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t.integer :author_id, index: true, null: false
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t.integer :target_id
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t.timestamps_with_timezone null: false
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t.integer :action, null: false, limit: 2, index: true
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t.string :target_type
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t.index %i[target_type target_id]
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end
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# t.references doesn't like it when the column name doesn't make the table
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# name so we have to add the foreign key separately.
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add_concurrent_foreign_key(:events_for_migration, :users, column: :author_id)
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end
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def down
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drop_table :events_for_migration
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end
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end
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