+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: AGPL-3.0
+
# Protect referential integrity of owner_uuid columns in other tables
# that can refer to the uuid column in this table.
module CanBeAnOwner
def self.included(base)
+ base.extend(ClassMethods)
+
# Rails' "has_many" can prevent us from destroying the owner
# record when other objects refer to it.
ActiveRecord::Base.connection.tables.each do |t|
next if t == base.table_name
next if t == 'schema_migrations'
+ next if t == 'permission_refresh_lock'
+ next if t == 'ar_internal_metadata'
+ next if t == 'commit_ancestors'
+ next if t == 'commits'
klass = t.classify.constantize
next unless klass and 'owner_uuid'.in?(klass.columns.collect(&:name))
base.has_many(t.to_sym,
foreign_key: :owner_uuid,
primary_key: :uuid,
- dependent: :restrict)
+ dependent: :restrict_with_exception)
end
# We need custom protection for changing an owner's primary
# key. (Apart from this restriction, admins are allowed to change
base.validate :restrict_uuid_change_breaking_associations
end
+ module ClassMethods
+ def install_view(type)
+ conn = ActiveRecord::Base.connection
+ transaction do
+ # Check whether the temporary view has already been created
+ # during this connection. If not, create it.
+ conn.exec_query "SAVEPOINT check_#{type}_view"
+ begin
+ conn.exec_query("SELECT 1 FROM #{type}_view LIMIT 0")
+ rescue
+ conn.exec_query "ROLLBACK TO SAVEPOINT check_#{type}_view"
+ sql = File.read(Rails.root.join("lib", "create_#{type}_view.sql"))
+ conn.exec_query(sql)
+ ensure
+ conn.exec_query "RELEASE SAVEPOINT check_#{type}_view"
+ end
+ end
+ end
+ end
+
+ def descendant_project_uuids
+ self.class.install_view('ancestor')
+ ActiveRecord::Base.connection.
+ exec_query('SELECT ancestor_view.uuid
+ FROM ancestor_view
+ LEFT JOIN groups ON groups.uuid=ancestor_view.uuid
+ WHERE ancestor_uuid = $1 AND groups.group_class = $2',
+ # "name" arg is a query label that appears in logs:
+ "descendant_project_uuids for #{self.uuid}",
+ # "binds" arg is an array of [col_id, value] for '$1' vars:
+ [[nil, self.uuid], [nil, 'project']],
+ ).rows.map do |project_uuid,|
+ project_uuid
+ end
+ end
+
protected
def restrict_uuid_change_breaking_associations
self.owner_uuid = uuid
end
end
-
end