blob: b5fd0cb3700f7dad2f05f33d6b7eb6df88ad682f (
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
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
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 = 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
def id_in_database
sync_with_transaction_state
attribute_in_database(self.class.primary_key)
end
private
def attribute_method?(attr_name)
attr_name == "id" || super
end
module ClassMethods
ID_ATTRIBUTE_METHODS = %w(id id= id? id_before_type_cast id_was id_in_database).to_set
def instance_method_already_implemented?(method_name)
super || primary_key && ID_ATTRIBUTE_METHODS.include?(method_name)
end
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?
pk = connection.schema_cache.primary_keys(table_name)
suppress_composite_primary_key(pk)
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
private
def suppress_composite_primary_key(pk)
return pk unless pk.is_a?(Array)
warn <<-WARNING.strip_heredoc
WARNING: Active Record does not support composite primary key.
#{table_name} has composite primary key. Composite primary key is ignored.
WARNING
end
end
end
end
end
|