docbrown/app/models/notification_subscription.rb
Jeremy Friesen be97f2fc07
Favoring dependent: :delete_all over :destroy (#15442)
* Favoring dependent: :delete_all over :destroy

The `dependent: :destroy` callback is slower than `dependent: :delete`
and `dependent: :delete_all`.  We need only favor the `dependent:
:destroy` when there's callbacks that happen.

In the case of :destroy, ActiveRecord instantiates each object and then
runs destroy.  Whereas in the case of :delete, ActiveRecord issues a SQL
command to delete the related files.

It is often "safer" to use :destroy, as it guarantees that you'll
instantiate the record and run it's callbacks.  But sometimes you have
to go with the speed of SQL.

This relates to #14140.  Note there is still more to consider, but given
that we're looking at moving from :destroy on all of an article's page
views to :delete, we might buy enough time in the callback.

* Removing redundancy of article destroy

Prior to this commit, `before_destroy_actions` called the `bust_cache`
method which in turn called `touch_actor_latest_article_updated_at` but
`bust_cache` did not pass the destroying parameter.  Then
`before_destroy_actions` immediately called
`touch_actor_latest_article_updated_at` with `destroying: true`.

With this change, we remove one of those duplicate calls.

* Fixing specs regarding relationships

* Fixing specs regarding relationships
2021-11-24 13:56:16 -05:00

25 lines
1 KiB
Ruby

# @note When we destroy the related user, it's using dependent:
# :delete for the relationship. That means no before/after
# destroy callbacks will be called on this object.
#
# @note When we destroy the related article, it's using dependent:
# :delete for the relationship. That means no before/after
# destroy callbacks will be called on this object.
class NotificationSubscription < ApplicationRecord
belongs_to :notifiable, polymorphic: true
belongs_to :user
validates :config, presence: true, inclusion: { in: %w[all_comments top_level_comments only_author_comments] }
validates :notifiable_id, presence: true
validates :notifiable_type, presence: true, inclusion: { in: %w[Comment Article] }
validates :user_id, uniqueness: { scope: %i[notifiable_type notifiable_id] }
class << self
def update_notification_subscriptions(notifiable)
NotificationSubscriptions::UpdateWorker.perform_async(
notifiable.id,
notifiable.class.name,
)
end
end
end