36 lines
913 B
Ruby
36 lines
913 B
Ruby
class AddUniqueConstraintToCiVariables < ActiveRecord::Migration[4.2]
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include Gitlab::Database::MigrationHelpers
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DOWNTIME = false
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INDEX_NAME = 'index_ci_variables_on_project_id_and_key_and_environment_scope'
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disable_ddl_transaction!
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def up
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unless this_index_exists?
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add_concurrent_index(:ci_variables, columns, name: INDEX_NAME, unique: true)
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end
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end
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def down
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if this_index_exists?
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if Gitlab::Database.mysql? && !index_exists?(:ci_variables, :project_id)
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# Need to add this index for MySQL project_id foreign key constraint
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add_concurrent_index(:ci_variables, :project_id)
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end
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remove_concurrent_index(:ci_variables, columns, name: INDEX_NAME)
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end
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end
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private
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def this_index_exists?
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index_exists?(:ci_variables, columns, name: INDEX_NAME)
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end
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def columns
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@columns ||= [:project_id, :key, :environment_scope]
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end
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end
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