blob: c28374e4ab4a9783f77c2ce8dd263f1a3149a78e (
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
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
require 'set'
module ActiveRecord
module AttributeMethods
module PrimaryKey
extend ActiveSupport::Concern
# Returns this record's primary key value wrapped in an Array if one is
# available.
def to_key
sync_with_transaction_state
key = self.id
[key] if key
end
# Returns the primary key value.
def id
if pk = self.class.primary_key
sync_with_transaction_state
_read_attribute(pk)
end
end
# Sets the primary key value.
def id=(value)
sync_with_transaction_state
write_attribute(self.class.primary_key, value) if self.class.primary_key
end
# Queries the primary key value.
def id?
sync_with_transaction_state
query_attribute(self.class.primary_key)
end
# Returns the primary key value before type cast.
def id_before_type_cast
sync_with_transaction_state
read_attribute_before_type_cast(self.class.primary_key)
end
# Returns the primary key previous value.
def id_was
sync_with_transaction_state
attribute_was(self.class.primary_key)
end
protected
def attribute_method?(attr_name)
attr_name == 'id' || super
end
module ClassMethods
def define_method_attribute(attr_name)
super
if attr_name == primary_key && attr_name != 'id'
generated_attribute_methods.send(:alias_method, :id, primary_key)
end
end
ID_ATTRIBUTE_METHODS = %w(id id= id? id_before_type_cast id_was).to_set
def dangerous_attribute_method?(method_name)
super && !ID_ATTRIBUTE_METHODS.include?(method_name)
end
# Defines the primary key field -- can be overridden in subclasses.
# Overwriting will negate any effect of the +primary_key_prefix_type+
# setting, though.
def primary_key
@primary_key = reset_primary_key unless defined? @primary_key
@primary_key
end
# Returns a quoted version of the primary key name, used to construct
# SQL statements.
def quoted_primary_key
@quoted_primary_key ||= connection.quote_column_name(primary_key)
end
def reset_primary_key #:nodoc:
if self == base_class
self.primary_key = get_primary_key(base_class.name)
else
self.primary_key = base_class.primary_key
end
end
def get_primary_key(base_name) #:nodoc:
if base_name && primary_key_prefix_type == :table_name
base_name.foreign_key(false)
elsif base_name && primary_key_prefix_type == :table_name_with_underscore
base_name.foreign_key
else
if ActiveRecord::Base != self && table_exists?
connection.schema_cache.primary_keys(table_name)
else
'id'
end
end
end
# Sets the name of the primary key column.
#
# class Project < ActiveRecord::Base
# self.primary_key = 'sysid'
# end
#
# You can also define the +primary_key+ method yourself:
#
# class Project < ActiveRecord::Base
# def self.primary_key
# 'foo_' + super
# end
# end
#
# Project.primary_key # => "foo_id"
def primary_key=(value)
@primary_key = value && value.to_s
@quoted_primary_key = nil
@attributes_builder = nil
end
end
end
end
end
|
