Учитывая этот пример:
class Server < ActiveRecord::Base
has_many :clients,:dependent => :destroy
after_destroy: delete_server_directory
end
class Client < ActiveRecord::Base
belongs_to :server
before_destroy :copy_some_important_stuff_from_the_server_directory_before_its_too_late
end
Будет это быть порядком разрушения, когда я буду звонить server.destroy
?
Server#clients
, наряду с Client
before/after_destroy
обратные вызовыServer
будет уничтоженServer
after_destroy
обратный вызов Вы можете очень легко проверить. Я взял ваш код и реализовал обратные вызовы простым вызовом на put
. Затем запустил скрипт/консоль
и записал в консоль лог ActiveRecord:
>> ActiveRecord::Base.logger = Logger.new(STDOUT)
=> #<Logger:0x0000000308d2f0 ...>
Настройка некоторого базового окружения:
>> a = Client.create :name => 'Client 1'
Client Create (0.4ms) INSERT INTO "clients" ("name", "server_id") VALUES('Client 1', NULL)
=> #<Client id: 1, name: "Client 1", server_id: nil>
>> b = Client.create :name => 'Client 2'
Client Create (0.5ms) INSERT INTO "clients" ("name", "server_id") VALUES('Client 2', NULL)
=> #<Client id: 2, name: "Client 2", server_id: nil>
>> server = Server.create :name => 'The Server'
Server Create (0.3ms) INSERT INTO "servers" ("name") VALUES('The Server')
=> #<Server id: 1, name: "The Server">
>> server.clients = [a, b]
Client Load (0.4ms) SELECT * FROM "clients" WHERE ("clients".server_id = 1)
Client Update (0.4ms) UPDATE "clients" SET "server_id" = 1 WHERE "id" = 1
Client Update (0.2ms) UPDATE "clients" SET "server_id" = 1 WHERE "id" = 2
=> [#<Client id: 1, name: "Client 1", server_id: 1>, #<Client id: 2, name: "Client 2", server_id: 1>]
И вот в чем суть:
>> server.destroy
>>> copy_some_important_stuff_from_the_server_directory_before_its_too_late called!
Client Destroy (0.5ms) DELETE FROM "clients" WHERE "id" = 1
>>> copy_some_important_stuff_from_the_server_directory_before_its_too_late called!
Client Destroy (0.2ms) DELETE FROM "clients" WHERE "id" = 2
Server Destroy (0.2ms) DELETE FROM "servers" WHERE "id" = 1
>>> delete_server_directory called!
=> #<Server id: 1, name: "The Server">
Похоже, вы были мертвы на месте. :)
P.S.
after_destroy
. before_destroy
, как видно из вашего примера.