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
37 lines
1.2 KiB
Ruby
37 lines
1.2 KiB
Ruby
# frozen_string_literal: true
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class DropFkGcpClustersTable < 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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remove_foreign_key_if_exists :gcp_clusters, column: :project_id
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remove_foreign_key_if_exists :gcp_clusters, column: :user_id
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remove_foreign_key_if_exists :gcp_clusters, column: :service_id
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end
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def down
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add_foreign_key_if_not_exists :gcp_clusters, :projects, column: :project_id, on_delete: :cascade
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add_foreign_key_if_not_exists :gcp_clusters, :users, column: :user_id, on_delete: :nullify
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add_foreign_key_if_not_exists :gcp_clusters, :services, column: :service_id, on_delete: :nullify
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end
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private
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def add_foreign_key_if_not_exists(source, target, column:, on_delete:)
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return unless table_exists?(source)
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return if foreign_key_exists?(source, target, column: column)
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add_concurrent_foreign_key(source, target, column: column, on_delete: on_delete)
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end
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def remove_foreign_key_if_exists(table, column:)
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return unless table_exists?(table)
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return unless foreign_key_exists?(table, column: column)
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remove_foreign_key(table, column: column)
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end
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end
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