mastodon/app/models/concerns/paginable.rb
Eugen Rochko f0fff3eb10
Support min_id-based pagination in REST API (#8736)
* Allow min_id pagination in Feed#get

* Add min_id pagination to home and list timeline APIs

* Add min_id pagination to account statuses, public and tag APIs

* Remove unused stub in reports API

* Use min_id pagination in notifications, favourites, and fix order

* Fix HomeFeed#from_database not using paginate_by_id
2018-09-28 02:23:45 +02:00

32 lines
1.1 KiB
Ruby

# frozen_string_literal: true
module Paginable
extend ActiveSupport::Concern
included do
scope :paginate_by_max_id, ->(limit, max_id = nil, since_id = nil) {
query = order(arel_table[:id].desc).limit(limit)
query = query.where(arel_table[:id].lt(max_id)) if max_id.present?
query = query.where(arel_table[:id].gt(since_id)) if since_id.present?
query
}
# Differs from :paginate_by_max_id in that it gives the results immediately following min_id,
# whereas since_id gives the items with largest id, but with since_id as a cutoff.
# Results will be in ascending order by id.
scope :paginate_by_min_id, ->(limit, min_id = nil) {
query = reorder(arel_table[:id]).limit(limit)
query = query.where(arel_table[:id].gt(min_id)) if min_id.present?
query
}
scope :paginate_by_id, ->(limit, **options) {
if options[:min_id].present?
paginate_by_min_id(limit, options[:min_id]).reverse
else
paginate_by_max_id(limit, options[:max_id], options[:since_id])
end
}
end
end