0fc9f9d3e7
DB schema generated by a migration may look different in rails 4 and 5 (because rails 5 may use different default values). For this reason it's important to explicitly set for which rails version a migration was written for. See https://stackoverflow.com/questions/35929869/activerecordmigration-deprecation-warning-asks-for-rails-version-but-im-no/35930912#35930912
18 lines
483 B
Ruby
18 lines
483 B
Ruby
# rubocop:disable RemoveIndex
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class MergeRequestDiffAddIndex < ActiveRecord::Migration[4.2]
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include Gitlab::Database::MigrationHelpers
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disable_ddl_transaction!
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# Set this constant to true if this migration requires downtime.
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DOWNTIME = false
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def up
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add_concurrent_index :merge_request_diffs, :merge_request_id
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end
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def down
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if index_exists?(:merge_request_diffs, :merge_request_id)
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remove_index :merge_request_diffs, :merge_request_id
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end
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end
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end
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