/
decorated_association.rb
55 lines (44 loc) · 1.11 KB
/
decorated_association.rb
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
50
51
52
53
54
55
module Draper
class DecoratedAssociation
attr_reader :source, :association, :options
def initialize(source, association, options)
@source = source
@association = association
@options = options
end
def call
return undecorated if undecorated.nil? || undecorated == []
decorate
end
private
def undecorated
@undecorated ||= begin
associated = source.send(association)
associated = associated.send(options[:scope]) if options[:scope]
associated
end
end
def decorate
@decorated ||= decorator_class.send(decorate_method, undecorated, options)
end
def decorate_method
if collection? && decorator_class.respond_to?(:decorate_collection)
:decorate_collection
else
:decorate
end
end
def collection?
undecorated.respond_to?(:first)
end
def decorator_class
return options[:with] if options[:with]
if collection?
options[:with] = :infer
Draper::CollectionDecorator
else
undecorated.decorator_class
end
end
end
end