hometown/app/controllers/api/v1/timelines/public_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
1.6 KiB
Ruby

# frozen_string_literal: true
class Api::V1::Timelines::PublicController < Api::BaseController
before_action :require_user!, only: [:show], if: :require_auth?
after_action :insert_pagination_headers, unless: -> { @statuses.empty? }
def show
@statuses = load_statuses
render json: @statuses, each_serializer: REST::StatusSerializer, relationships: StatusRelationshipsPresenter.new(@statuses, current_user&.account_id)
end
private
def require_auth?
!Setting.timeline_preview
end
def load_statuses
cached_public_statuses_page
end
def cached_public_statuses_page
cache_collection_paginated_by_id(
public_statuses,
Status,
limit_param(DEFAULT_STATUSES_LIMIT),
params_slice(:max_id, :since_id, :min_id)
)
end
def public_statuses
statuses = public_timeline_statuses
if truthy_param?(:only_media)
statuses.joins(:media_attachments).group(:id)
else
statuses
end
end
def public_timeline_statuses
Status.as_public_timeline(current_account, truthy_param?(:remote) ? :remote : truthy_param?(:local))
end
def insert_pagination_headers
set_pagination_headers(next_path, prev_path)
end
def pagination_params(core_params)
params.slice(:local, :remote, :limit, :only_media).permit(:local, :remote, :limit, :only_media).merge(core_params)
end
def next_path
api_v1_timelines_public_url pagination_params(max_id: pagination_max_id)
end
def prev_path
api_v1_timelines_public_url pagination_params(min_id: pagination_since_id)
end
def pagination_max_id
@statuses.last.id
end
def pagination_since_id
@statuses.first.id
end
end