blob: 9f74d57c4d45376fea6adb63e2bacfb6969a654e (
plain) (
blame)
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
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
require 'active_support/core_ext/object/blank'
module ActiveRecord
# = Active Record Has Many Through Association
module Associations
class HasManyThroughAssociation < HasManyAssociation #:nodoc:
include ThroughAssociation
alias_method :new, :build
# Returns the size of the collection by executing a SELECT COUNT(*) query if the collection hasn't been
# loaded and calling collection.size if it has. If it's more likely than not that the collection does
# have a size larger than zero, and you need to fetch that collection afterwards, it'll take one fewer
# SELECT query if you use #length.
def size
if has_cached_counter?
@owner.send(:read_attribute, cached_counter_attribute_name)
elsif loaded?
@target.size
else
count
end
end
def <<(*records)
unless @owner.new_record?
records.flatten.each do |record|
raise_on_type_mismatch(record)
record.save! if record.new_record?
end
end
super
end
protected
def insert_record(record, validate = true)
return if record.new_record? && !record.save(:validate => validate)
through_association = @owner.send(@reflection.through_reflection.name)
through_association.create!(construct_join_attributes(record))
update_counter(1)
record
end
private
def target_reflection_has_associated_record?
if @reflection.through_reflection.macro == :belongs_to && @owner[@reflection.through_reflection.foreign_key].blank?
false
else
true
end
end
def update_through_counter?(method)
case method
when :destroy
!inverse_updates_counter_cache?(@reflection.through_reflection)
when :nullify
false
else
true
end
end
def delete_records(records, method)
through = @owner.send(:association_proxy, @reflection.through_reflection.name)
scope = through.scoped.where(construct_join_attributes(*records))
case method
when :destroy
count = scope.destroy_all.length
when :nullify
count = scope.update_all(@reflection.source_reflection.foreign_key => nil)
else
count = scope.delete_all
end
if @reflection.through_reflection.macro == :has_many && update_through_counter?(method)
update_counter(-count, @reflection.through_reflection)
end
update_counter(-count)
end
def find_target
return [] unless target_reflection_has_associated_record?
scoped.all
end
# NOTE - not sure that we can actually cope with inverses here
def invertible_for?(record)
false
end
end
end
end
|