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
28 lines
904 B
Ruby
28 lines
904 B
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 ReorganizeDeploymentsIndexes < ActiveRecord::Migration[4.2]
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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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def up
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add_index_if_not_exists :deployments, [:environment_id, :iid, :project_id]
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remove_index_if_exists :deployments, [:project_id, :environment_id, :iid]
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end
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def down
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add_index_if_not_exists :deployments, [:project_id, :environment_id, :iid]
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remove_index_if_exists :deployments, [:environment_id, :iid, :project_id]
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end
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def add_index_if_not_exists(table, columns)
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add_concurrent_index(table, columns) unless index_exists?(table, columns)
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end
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def remove_index_if_exists(table, columns)
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remove_concurrent_index(table, columns) if index_exists?(table, columns)
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end
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end
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