mastodon/app/controllers/activitypub/outboxes_controller.rb
Akihiko Odaki 64ef37b89d
Introduce ApplicationController#cache_collection_paginated_by_id (#14677)
* Replace incorrect use of distinct with group

Some uses of ActiveRecord::QueryMethods#distinct pass field names but they
are incorrect for the current version of Rails.

ActiveRecord::QueryMethods#group provides the expected behavior and
benefits performance. See commit 6da24aad4cafdef8d8a2c92bac2002a5fc2fe9c8.

* Introduce ApplicationController#cache_collection_paginated_by_id

ApplicationController#cache_collection_paginated_by_id fuses
ApplicationController#cache_collection and Paginable.paginate_by_id.

An advantage of this method is that it prevents from modifying scope which
Paginable.paginate_by_id may provide.
ApplicationController#cache_collection always return an array and there
is no possibility of the scope modification. It is also clear for a
programmer, considering the implication of "cache".

This method can also emit more efficient queries by using
Cacheable.cache_ids before calling Paginable.paginate_by_id.
2020-08-28 12:31:56 +02:00

69 lines
1.9 KiB
Ruby

# frozen_string_literal: true
class ActivityPub::OutboxesController < ActivityPub::BaseController
LIMIT = 20
include SignatureVerification
include AccountOwnedConcern
before_action :require_signature!, if: :authorized_fetch_mode?
before_action :set_statuses
before_action :set_cache_headers
def show
expires_in(page_requested? ? 0 : 3.minutes, public: public_fetch_mode? && !(signed_request_account.present? && page_requested?))
render json: outbox_presenter, serializer: ActivityPub::OutboxSerializer, adapter: ActivityPub::Adapter, content_type: 'application/activity+json'
end
private
def outbox_presenter
if page_requested?
ActivityPub::CollectionPresenter.new(
id: account_outbox_url(@account, page_params),
type: :ordered,
part_of: account_outbox_url(@account),
prev: prev_page,
next: next_page,
items: @statuses
)
else
ActivityPub::CollectionPresenter.new(
id: account_outbox_url(@account),
type: :ordered,
size: @account.statuses_count,
first: account_outbox_url(@account, page: true),
last: account_outbox_url(@account, page: true, min_id: 0)
)
end
end
def next_page
account_outbox_url(@account, page: true, max_id: @statuses.last.id) if @statuses.size == LIMIT
end
def prev_page
account_outbox_url(@account, page: true, min_id: @statuses.first.id) unless @statuses.empty?
end
def set_statuses
return unless page_requested?
@statuses = @account.statuses.permitted_for(@account, signed_request_account)
@statuses = cache_collection_paginated_by_id(
@statuses,
Status,
LIMIT,
params_slice(:max_id, :min_id, :since_id)
)
end
def page_requested?
truthy_param?(:page)
end
def page_params
{ page: true, max_id: params[:max_id], min_id: params[:min_id] }.compact
end
end