Sha256: 8f62dd0412a0053f87a0d4ca4374ee284ab96f26c470caf7c30aa92896850608
Contents?: true
Size: 950 Bytes
Versions: 13
Compression:
Stored size: 950 Bytes
Contents
class MissionControl::Jobs::Page
DEFAULT_PAGE_SIZE = 10
attr_reader :records, :index, :page_size
def initialize(relation, page: 1, page_size: DEFAULT_PAGE_SIZE)
@relation = relation
@page_size = page_size
@index = [ page, 1 ].max
end
def records
@relation.limit(page_size).offset(offset)
end
def first?
index == 1
end
def last?
index == pages_count || empty? || records.empty?
end
def empty?
total_count == 0
end
def previous_index
[ index - 1, 1 ].max
end
def next_index
pages_count ? [ index + 1, pages_count ].min : index + 1
end
def pages_count
(total_count.to_f / page_size).ceil unless total_count.infinite?
end
def total_count
@total_count ||= @relation.count # Potentially expensive when filtering a lot of records, with the adapter in charge of doing the filtering in memory
end
private
def offset
(index - 1) * page_size
end
end
Version data entries
13 entries across 13 versions & 1 rubygems