blob: 77a85edfba6fc50ed15fa7f2ce96597cce22116a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
# frozen_string_literal: true
module LooksAhead
extend ActiveSupport::Concern
included do
extras [:lookahead]
attr_accessor :lookahead
end
def resolve(**args)
self.lookahead = args.delete(:lookahead)
resolve_with_lookahead(**args)
end
def apply_lookahead(query)
selection = node_selection
includes = preloads.each.flat_map do |name, requirements|
selection&.selects?(name) ? requirements : []
end
all_preloads = (unconditional_includes + includes).uniq
return query if all_preloads.empty?
query.preload(*all_preloads) # rubocop: disable CodeReuse/ActiveRecord
end
private
def unconditional_includes
[]
end
def preloads
{}
end
def node_selection
return unless lookahead
if lookahead.selects?(:nodes)
lookahead.selection(:nodes)
elsif lookahead.selects?(:edges)
lookahead.selection(:edges).selection(:node)
end
end
end
|
