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# frozen_string_literal: true
class AddCascadeDeleteFkOnProjectNamespaceId < Gitlab::Database::Migration[1.0]
disable_ddl_transaction!
TARGET_COLUMN = :project_namespace_id
def up
# add the new FK before removing the old one
add_concurrent_foreign_key(
:projects,
:namespaces,
column: TARGET_COLUMN,
name: fk_name("#{TARGET_COLUMN}_new"),
on_delete: :cascade
)
with_lock_retries do
remove_foreign_key_if_exists(:projects, column: TARGET_COLUMN, name: fk_name(TARGET_COLUMN))
end
end
def down
add_concurrent_foreign_key(
:projects,
:namespaces,
column: TARGET_COLUMN,
name: fk_name(TARGET_COLUMN),
on_delete: :nullify
)
with_lock_retries do
remove_foreign_key_if_exists(:projects, column: TARGET_COLUMN, name: fk_name("#{TARGET_COLUMN}_new"))
end
end
def fk_name(column_name)
# generate a FK name
concurrent_foreign_key_name(:projects, column_name)
end
end
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