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# See http://doc.gitlab.com/ce/development/migration_style_guide.html
# for more information on how to write migrations for GitLab.
class CorrectProtectedTagsForeignKeys < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers
# Set this constant to true if this migration requires downtime.
DOWNTIME = false
disable_ddl_transaction!
def up
remove_foreign_key_without_error(:protected_tag_create_access_levels,
column: :protected_tag_id)
execute <<-EOF
DELETE FROM protected_tag_create_access_levels
WHERE NOT EXISTS (
SELECT true
FROM protected_tags
WHERE protected_tag_create_access_levels.protected_tag_id = protected_tags.id
)
AND protected_tag_id IS NOT NULL
EOF
add_concurrent_foreign_key(:protected_tag_create_access_levels,
:protected_tags,
column: :protected_tag_id)
end
def down
# Previously there was a foreign key without a CASCADING DELETE, so we'll
# just leave the foreign key in place.
end
end
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