21 lines
611 B
Ruby
21 lines
611 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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# rubocop:disable RemoveIndex
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class AddUniqueIndexForEnvironmentSlug < ActiveRecord::Migration[4.2]
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include Gitlab::Database::MigrationHelpers
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DOWNTIME = true
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DOWNTIME_REASON = 'Adding a *unique* index to environments.slug'
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disable_ddl_transaction!
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def up
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add_concurrent_index :environments, [:project_id, :slug], unique: true
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end
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def down
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remove_index :environments, [:project_id, :slug] if index_exists? :environments, [:project_id, :slug]
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end
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end
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