docbrown/app/models/follow.rb
Jeremy Friesen 2b3f4e1342
Refactoring cached_followed_tags (#16175)
* Refactoring cached_followed_tags

This refactor consolidates two queries and a loop into a single query.

One thing that is unclear is if we're ever really clearing the cache of
the user by id?

What follows is un-related to the refactor but appears to be related to #14937.

> First, I see we set a cache here:
>
> ebdaaaf15b/app/decorators/user_decorator.rb (L23-L34)
>
> But when I look at what busts the user cache, it doesn’t look like we’re busting it for the above cached location:
>
> ebdaaaf15b/app/services/edge_cache/bust_user.rb (L3-L22)
>
> What if anything am I missing in regards to cache busting?

* Adding some deprecated methods

* Updating documentation

* Bump for travis

* Bump for travis

* Updating comments to fix confusion

NOTE: I might be introducing more confusion, but at least
I'm addressing the prior confusion.

* Bump for travis

* Updating so we don't cache ActiveRecord objects

* Selecting only applicable attributes for caching

* Apply suggestions from code review

Co-authored-by: Michael Kohl <citizen428@forem.com>

* Adjusting code based on feedback

* Bump for travis

* Bump for travis

* Update app/decorators/user_decorator.rb

Co-authored-by: Michael Kohl <citizen428@forem.com>

Co-authored-by: Michael Kohl <citizen428@forem.com>
2022-01-24 19:53:48 -05:00

60 lines
2.3 KiB
Ruby

class Follow < ApplicationRecord
extend ActsAsFollower::FollowerLib
extend ActsAsFollower::FollowScopes
COUNTER_CULTURE_COLUMN_NAME_BY_TYPE = {
"User" => "following_users_count",
"Organization" => "following_orgs_count",
"ActsAsTaggableOn::Tag" => "following_tags_count"
}.freeze
COUNTER_CULTURE_COLUMNS_NAMES = {
["follows.followable_type = ?", "User"] => "following_users_count",
["follows.followable_type = ?", "Organization"] => "following_orgs_count",
["follows.followable_type = ?", "ActsAsTaggableOn::Tag"] => "following_tags_count"
}.freeze
# Follows belong to the "followable" interface, and also to followers
belongs_to :followable, polymorphic: true
belongs_to :follower, polymorphic: true
scope :followable_user, ->(id) { where(followable_id: id, followable_type: "User") }
scope :followable_tag, ->(id) { where(followable_id: id, followable_type: "ActsAsTaggableOn::Tag") }
# NOTE: These assume that we have one follower_type (as defined by acts_as_follower).
scope :follower_user, ->(id) { where(follower_id: id, followable_type: "User") }
scope :follower_organization, ->(id) { where(follower_id: id, followable_type: "Organization") }
scope :follower_podcast, ->(id) { where(follower_id: id, followable_type: "Podcast") }
scope :follower_tag, ->(id) { where(follower_id: id, followable_type: "ActsAsTaggableOn::Tag") }
counter_culture :follower, column_name: proc { |follow| COUNTER_CULTURE_COLUMN_NAME_BY_TYPE[follow.followable_type] },
column_names: COUNTER_CULTURE_COLUMNS_NAMES
before_save :calculate_points
after_create :send_email_notification
after_save :touch_follower
validates :blocked, inclusion: { in: [true, false] }
validates :followable_type, presence: true
validates :follower_type, presence: true
validates :subscription_status, presence: true, inclusion: { in: %w[all_articles none] }
def self.need_new_follower_notification_for?(followable_type)
%w[User Organization].include?(followable_type)
end
private
def calculate_points
self.points = explicit_points + implicit_points
end
def touch_follower
follower.touch(:updated_at, :last_followed_at)
end
def send_email_notification
return unless followable.instance_of?(User) && followable.email?
Follows::SendEmailNotificationWorker.perform_async(id)
end
end