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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
|
require 'ostruct'
module DeveloperProjectsAssociationExtension2
def find_least_recent
order("id ASC").first
end
end
class Developer < ActiveRecord::Base
has_and_belongs_to_many :projects do
def find_most_recent
order("id DESC").first
end
end
accepts_nested_attributes_for :projects
has_and_belongs_to_many :projects_extended_by_name,
-> { extending(DeveloperProjectsAssociationExtension) },
:class_name => "Project",
:join_table => "developers_projects",
:association_foreign_key => "project_id"
has_and_belongs_to_many :projects_extended_by_name_twice,
-> { extending(DeveloperProjectsAssociationExtension, DeveloperProjectsAssociationExtension2) },
:class_name => "Project",
:join_table => "developers_projects",
:association_foreign_key => "project_id"
has_and_belongs_to_many :projects_extended_by_name_and_block,
-> { extending(DeveloperProjectsAssociationExtension) },
:class_name => "Project",
:join_table => "developers_projects",
:association_foreign_key => "project_id" do
def find_least_recent
order("id ASC").first
end
end
has_and_belongs_to_many :special_projects, :join_table => 'developers_projects', :association_foreign_key => 'project_id'
has_and_belongs_to_many :sym_special_projects,
:join_table => :developers_projects,
:association_foreign_key => 'project_id',
:class_name => 'SpecialProject'
has_many :audit_logs
has_many :contracts
has_many :firms, :through => :contracts, :source => :firm
scope :jamises, -> { where(:name => 'Jamis') }
validates_inclusion_of :salary, :in => 50000..200000
validates_length_of :name, :within => 3..20
before_create do |developer|
developer.audit_logs.build :message => "Computer created"
end
def log=(message)
audit_logs.build :message => message
end
after_find :track_instance_count
cattr_accessor :instance_count
def track_instance_count
self.class.instance_count ||= 0
self.class.instance_count += 1
end
private :track_instance_count
end
class AuditLog < ActiveRecord::Base
belongs_to :developer, :validate => true
belongs_to :unvalidated_developer, :class_name => 'Developer'
end
DeveloperSalary = Struct.new(:amount)
class DeveloperWithAggregate < ActiveRecord::Base
self.table_name = 'developers'
composed_of :salary, :class_name => 'DeveloperSalary', :mapping => [%w(salary amount)]
end
class DeveloperWithBeforeDestroyRaise < ActiveRecord::Base
self.table_name = 'developers'
has_and_belongs_to_many :projects, :join_table => 'developers_projects', :foreign_key => 'developer_id'
before_destroy :raise_if_projects_empty!
def raise_if_projects_empty!
raise if projects.empty?
end
end
class DeveloperWithSelect < ActiveRecord::Base
self.table_name = 'developers'
default_scope { select('name') }
end
class DeveloperWithIncludes < ActiveRecord::Base
self.table_name = 'developers'
has_many :audit_logs, :foreign_key => :developer_id
default_scope { includes(:audit_logs) }
end
class DeveloperFilteredOnJoins < ActiveRecord::Base
self.table_name = 'developers'
has_and_belongs_to_many :projects, -> { order('projects.id') }, :foreign_key => 'developer_id', :join_table => 'developers_projects'
def self.default_scope
joins(:projects).where(:projects => { :name => 'Active Controller' })
end
end
class DeveloperOrderedBySalary < ActiveRecord::Base
self.table_name = 'developers'
default_scope { order('salary DESC') }
scope :by_name, -> { order('name DESC') }
end
class DeveloperCalledDavid < ActiveRecord::Base
self.table_name = 'developers'
default_scope { where("name = 'David'") }
end
class LazyLambdaDeveloperCalledDavid < ActiveRecord::Base
self.table_name = 'developers'
default_scope lambda { where(:name => 'David') }
end
class LazyBlockDeveloperCalledDavid < ActiveRecord::Base
self.table_name = 'developers'
default_scope { where(:name => 'David') }
end
class CallableDeveloperCalledDavid < ActiveRecord::Base
self.table_name = 'developers'
default_scope OpenStruct.new(:call => where(:name => 'David'))
end
class ClassMethodDeveloperCalledDavid < ActiveRecord::Base
self.table_name = 'developers'
def self.default_scope
where(:name => 'David')
end
end
class ClassMethodReferencingScopeDeveloperCalledDavid < ActiveRecord::Base
self.table_name = 'developers'
scope :david, -> { where(:name => 'David') }
def self.default_scope
david
end
end
class LazyBlockReferencingScopeDeveloperCalledDavid < ActiveRecord::Base
self.table_name = 'developers'
scope :david, -> { where(:name => 'David') }
default_scope { david }
end
class DeveloperCalledJamis < ActiveRecord::Base
self.table_name = 'developers'
default_scope { where(:name => 'Jamis') }
scope :poor, -> { where('salary < 150000') }
scope :david, -> { where name: "David" }
scope :david2, -> { unscoped.where name: "David" }
end
class PoorDeveloperCalledJamis < ActiveRecord::Base
self.table_name = 'developers'
default_scope -> { where(:name => 'Jamis', :salary => 50000) }
end
class InheritedPoorDeveloperCalledJamis < DeveloperCalledJamis
self.table_name = 'developers'
default_scope -> { where(:salary => 50000) }
end
class MultiplePoorDeveloperCalledJamis < ActiveRecord::Base
self.table_name = 'developers'
default_scope -> { where(:name => 'Jamis') }
default_scope -> { where(:salary => 50000) }
end
module SalaryDefaultScope
extend ActiveSupport::Concern
included { default_scope { where(:salary => 50000) } }
end
class ModuleIncludedPoorDeveloperCalledJamis < DeveloperCalledJamis
self.table_name = 'developers'
include SalaryDefaultScope
end
class EagerDeveloperWithDefaultScope < ActiveRecord::Base
self.table_name = 'developers'
has_and_belongs_to_many :projects, -> { order('projects.id') }, :foreign_key => 'developer_id', :join_table => 'developers_projects'
default_scope { includes(:projects) }
end
class EagerDeveloperWithClassMethodDefaultScope < ActiveRecord::Base
self.table_name = 'developers'
has_and_belongs_to_many :projects, -> { order('projects.id') }, :foreign_key => 'developer_id', :join_table => 'developers_projects'
def self.default_scope
includes(:projects)
end
end
class EagerDeveloperWithLambdaDefaultScope < ActiveRecord::Base
self.table_name = 'developers'
has_and_belongs_to_many :projects, -> { order('projects.id') }, :foreign_key => 'developer_id', :join_table => 'developers_projects'
default_scope lambda { includes(:projects) }
end
class EagerDeveloperWithBlockDefaultScope < ActiveRecord::Base
self.table_name = 'developers'
has_and_belongs_to_many :projects, -> { order('projects.id') }, :foreign_key => 'developer_id', :join_table => 'developers_projects'
default_scope { includes(:projects) }
end
class EagerDeveloperWithCallableDefaultScope < ActiveRecord::Base
self.table_name = 'developers'
has_and_belongs_to_many :projects, -> { order('projects.id') }, :foreign_key => 'developer_id', :join_table => 'developers_projects'
default_scope OpenStruct.new(:call => includes(:projects))
end
class ThreadsafeDeveloper < ActiveRecord::Base
self.table_name = 'developers'
def self.default_scope
sleep 0.05 if Thread.current[:long_default_scope]
limit(1)
end
end
class CachedDeveloper < ActiveRecord::Base
self.table_name = "developers"
self.cache_timestamp_format = :number
end
|
