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Contents
# frozen_string_literal: true
module GraphQL
module Relay
class ArrayConnection < BaseConnection
def cursor_from_node(item)
idx = (after ? index_from_cursor(after) : 0) + sliced_nodes.find_index(item) + 1
encode(idx.to_s)
end
private
def first
return @first if defined? @first
@first = get_limited_arg(:first)
@first = max_page_size if @first && max_page_size && @first > max_page_size
@first
end
def last
return @last if defined? @last
@last = get_limited_arg(:last)
@last = max_page_size if @last && max_page_size && @last > max_page_size
@last
end
# apply first / last limit results
def paged_nodes
@paged_nodes ||= begin
items = sliced_nodes
items = items.first(first) if first
items = items.last(last) if last
items = items.first(max_page_size) if max_page_size && !first && !last
items
end
end
# Apply cursors to edges
def sliced_nodes
@sliced_nodes ||= if before && after
nodes[index_from_cursor(after)..index_from_cursor(before)-1] || []
elsif before
nodes[0..index_from_cursor(before)-2] || []
elsif after
nodes[index_from_cursor(after)..-1] || []
else
nodes
end
end
def index_from_cursor(cursor)
decode(cursor).to_i
end
end
BaseConnection.register_connection_implementation(Array, ArrayConnection)
end
end
Version data entries
10 entries across 10 versions & 1 rubygems