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
101
102
|
require 'active_support/core_ext/module/attribute_accessors'
module ActiveRecord
module AttributeMethods
module Dirty # :nodoc:
extend ActiveSupport::Concern
include ActiveModel::Dirty
included do
if self < ::ActiveRecord::Timestamp
raise "You cannot include Dirty after Timestamp"
end
class_attribute :partial_writes, instance_writer: false
self.partial_writes = true
end
# Attempts to +save+ the record and clears changed attributes if successful.
def save(*)
if status = super
changes_applied
end
status
end
# Attempts to <tt>save!</tt> the record and clears changed attributes if successful.
def save!(*)
super.tap do
changes_applied
end
end
# <tt>reload</tt> the record and clears changed attributes.
def reload(*)
super.tap do
reset_changes
end
end
def initialize_dup(other) # :nodoc:
super
init_changed_attributes
end
private
def initialize_internals_callback
super
init_changed_attributes
end
def init_changed_attributes
@changed_attributes = nil
# Intentionally avoid using #column_defaults since overridden defaults (as is done in
# optimistic locking) won't get written unless they get marked as changed
self.class.columns.each do |c|
attr, orig_value = c.name, c.default
changed_attributes[attr] = orig_value if _field_changed?(attr, orig_value, @raw_attributes[attr])
end
end
# Wrap write_attribute to remember original attribute value.
def write_attribute(attr, value)
attr = attr.to_s
save_changed_attribute(attr, value)
super(attr, value)
end
def save_changed_attribute(attr, value)
# The attribute already has an unsaved change.
if attribute_changed?(attr)
old = changed_attributes[attr]
changed_attributes.delete(attr) unless _field_changed?(attr, old, value)
else
old = clone_attribute_value(:read_attribute, attr)
changed_attributes[attr] = old if _field_changed?(attr, old, value)
end
end
def _update_record(*)
partial_writes? ? super(keys_for_partial_write) : super
end
def _create_record(*)
partial_writes? ? super(keys_for_partial_write) : super
end
# Serialized attributes should always be written in case they've been
# changed in place.
def keys_for_partial_write
changed
end
def _field_changed?(attr, old, value)
column = column_for_attribute(attr) || Type::Value.new
column.changed?(old, value)
end
end
end
end
|