chinwagsocial/app/models/concerns/paginable.rb
2023-02-18 12:39:00 +01:00

32 lines
1.2 KiB
Ruby

# frozen_string_literal: true
module Paginable
extend ActiveSupport::Concern
included do
scope :paginate_by_max_id, lambda { |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, lambda { |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