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mastodon/app/models/concerns/paginable.rb
tateisu fa0c71f0d9
allow pagination by min_id and max_id (#14776)
* allow pagination by min_id and max_id

* also AccountConversation allows min_id,max_id pair

* also home,list TL allows min_id,max_id pair
2020-09-12 17:09:49 +02:00

33 lines
1.2 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, max_id = nil) {
query = reorder(arel_table[:id]).limit(limit)
query = query.where(arel_table[:id].gt(min_id)) if min_id.present?
query = query.where(arel_table[:id].lt(max_id)) if max_id.present?
query
}
def self.to_a_paginated_by_id(limit, options = {})
if options[:min_id].present?
paginate_by_min_id(limit, options[:min_id], options[:max_id]).reverse
else
paginate_by_max_id(limit, options[:max_id], options[:since_id]).to_a
end
end
end
end