aboutsummaryrefslogtreecommitdiffstats
path: root/activerecord/test/cases/associations_test.rb
blob: dd8152b219734c53c2b190d6c16e30c527402f83 (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
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
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
require "cases/helper"
require 'models/developer'
require 'models/project'
require 'models/company'
require 'models/categorization'
require 'models/category'
require 'models/post'
require 'models/author'
require 'models/comment'
require 'models/tag'
require 'models/tagging'
require 'models/person'
require 'models/reader'
require 'models/parrot'
require 'models/ship_part'
require 'models/ship'
require 'models/liquid'
require 'models/molecule'
require 'models/electron'

class AssociationsTest < ActiveRecord::TestCase
  fixtures :accounts, :companies, :developers, :projects, :developers_projects,
           :computers, :people, :readers

  def test_eager_loading_should_not_change_count_of_children
    liquid = Liquid.create(:name => 'salty')
    molecule = liquid.molecules.create(:name => 'molecule_1')
    molecule.electrons.create(:name => 'electron_1')
    molecule.electrons.create(:name => 'electron_2')

    liquids = Liquid.includes(:molecules => :electrons).where('molecules.id is not null')
    assert_equal 1, liquids[0].molecules.length
  end

  def test_clear_association_cache_stored
    firm = Firm.find(1)
    assert_kind_of Firm, firm

    firm.clear_association_cache
    assert_equal Firm.find(1).clients.collect{ |x| x.name }.sort, firm.clients.collect{ |x| x.name }.sort
  end

  def test_clear_association_cache_new_record
     firm            = Firm.new
     client_stored   = Client.find(3)
     client_new      = Client.new
     client_new.name = "The Joneses"
     clients         = [ client_stored, client_new ]

     firm.clients    << clients
     assert_equal clients.map(&:name).to_set, firm.clients.map(&:name).to_set

     firm.clear_association_cache
     assert_equal clients.map(&:name).to_set, firm.clients.map(&:name).to_set
  end

  def test_loading_the_association_target_should_keep_child_records_marked_for_destruction
    ship = Ship.create!(:name => "The good ship Dollypop")
    part = ship.parts.create!(:name => "Mast")
    part.mark_for_destruction
    ship.parts.send(:load_target)
    assert ship.parts[0].marked_for_destruction?
  end

  def test_loading_the_association_target_should_load_most_recent_attributes_for_child_records_marked_for_destruction
    ship = Ship.create!(:name => "The good ship Dollypop")
    part = ship.parts.create!(:name => "Mast")
    part.mark_for_destruction
    ShipPart.find(part.id).update_attribute(:name, 'Deck')
    ship.parts.send(:load_target)
    assert_equal 'Deck', ship.parts[0].name
  end


  def test_include_with_order_works
    assert_nothing_raised {Account.find(:first, :order => 'id', :include => :firm)}
    assert_nothing_raised {Account.find(:first, :order => :id, :include => :firm)}
  end

  def test_bad_collection_keys
    assert_raise(ArgumentError, 'ActiveRecord should have barked on bad collection keys') do
      Class.new(ActiveRecord::Base).has_many(:wheels, :name => 'wheels')
    end
  end

  def test_should_construct_new_finder_sql_after_create
    person = Person.new :first_name => 'clark'
    assert_equal [], person.readers.find(:all)
    person.save!
    reader = Reader.create! :person => person, :post => Post.new(:title => "foo", :body => "bar")
    assert person.readers.find(reader.id)
  end

  def test_force_reload
    firm = Firm.new("name" => "A New Firm, Inc")
    firm.save
    firm.clients.each {|c|} # forcing to load all clients
    assert firm.clients.empty?, "New firm shouldn't have client objects"
    assert_equal 0, firm.clients.size, "New firm should have 0 clients"

    client = Client.new("name" => "TheClient.com", "firm_id" => firm.id)
    client.save

    assert firm.clients.empty?, "New firm should have cached no client objects"
    assert_equal 0, firm.clients.size, "New firm should have cached 0 clients count"

    assert !firm.clients(true).empty?, "New firm should have reloaded client objects"
    assert_equal 1, firm.clients(true).size, "New firm should have reloaded clients count"
  end

  def test_using_limitable_reflections_helper
    using_limitable_reflections = lambda { |reflections| Tagging.scoped.send :using_limitable_reflections?, reflections }
    belongs_to_reflections = [Tagging.reflect_on_association(:tag), Tagging.reflect_on_association(:super_tag)]
    has_many_reflections = [Tag.reflect_on_association(:taggings), Developer.reflect_on_association(:projects)]
    mixed_reflections = (belongs_to_reflections + has_many_reflections).uniq
    assert using_limitable_reflections.call(belongs_to_reflections), "Belong to associations are limitable"
    assert !using_limitable_reflections.call(has_many_reflections), "All has many style associations are not limitable"
    assert !using_limitable_reflections.call(mixed_reflections), "No collection associations (has many style) should pass"
  end

  def test_force_reload_is_uncached
    firm = Firm.create!("name" => "A New Firm, Inc")
    client = Client.create!("name" => "TheClient.com", :firm => firm)
    ActiveRecord::Base.cache do
      firm.clients.each {}
      assert_queries(0) { assert_not_nil firm.clients.each {} }
      assert_queries(1) { assert_not_nil firm.clients(true).each {} }
    end
  end

end

class AssociationProxyTest < ActiveRecord::TestCase
  fixtures :authors, :posts, :categorizations, :categories, :developers, :projects, :developers_projects

  def test_proxy_accessors
    welcome = posts(:welcome)
    assert_equal  welcome, welcome.author.proxy_owner
    assert_equal  welcome.class.reflect_on_association(:author), welcome.author.proxy_reflection
    welcome.author.class  # force load target
    assert_equal  welcome.author, welcome.author.proxy_target

    david = authors(:david)
    assert_equal  david, david.posts.proxy_owner
    assert_equal  david.class.reflect_on_association(:posts), david.posts.proxy_reflection
    david.posts.class   # force load target
    assert_equal  david.posts, david.posts.proxy_target

    assert_equal  david, david.posts_with_extension.testing_proxy_owner
    assert_equal  david.class.reflect_on_association(:posts_with_extension), david.posts_with_extension.testing_proxy_reflection
    david.posts_with_extension.class   # force load target
    assert_equal  david.posts_with_extension, david.posts_with_extension.testing_proxy_target
  end

  def test_push_does_not_load_target
    david = authors(:david)

    david.posts << (post = Post.new(:title => "New on Edge", :body => "More cool stuff!"))
    assert !david.posts.loaded?
    assert david.posts.include?(post)
  end

  def test_push_has_many_through_does_not_load_target
    david = authors(:david)

    david.categories << categories(:technology)
    assert !david.categories.loaded?
    assert david.categories.include?(categories(:technology))
  end

  def test_push_followed_by_save_does_not_load_target
    david = authors(:david)

    david.posts << (post = Post.new(:title => "New on Edge", :body => "More cool stuff!"))
    assert !david.posts.loaded?
    david.save
    assert !david.posts.loaded?
    assert david.posts.include?(post)
  end

  def test_push_does_not_lose_additions_to_new_record
    josh = Author.new(:name => "Josh")
    josh.posts << Post.new(:title => "New on Edge", :body => "More cool stuff!")
    assert josh.posts.loaded?
    assert_equal 1, josh.posts.size
  end

  def test_save_on_parent_does_not_load_target
    david = developers(:david)

    assert !david.projects.loaded?
    david.update_attribute(:created_at, Time.now)
    assert !david.projects.loaded?
  end

  def test_inspect_does_not_reload_a_not_yet_loaded_target
    andreas = Developer.new :name => 'Andreas', :log => 'new developer added'
    assert !andreas.audit_logs.loaded?
    assert_match(/message: "new developer added"/, andreas.audit_logs.inspect)
  end

  def test_save_on_parent_saves_children
    developer = Developer.create :name => "Bryan", :salary => 50_000
    assert_equal 1, developer.reload.audit_logs.size
  end

  def test_create_via_association_with_block
    post = authors(:david).posts.create(:title => "New on Edge") {|p| p.body = "More cool stuff!"}
    assert_equal post.title, "New on Edge"
    assert_equal post.body, "More cool stuff!"
  end

  def test_create_with_bang_via_association_with_block
    post = authors(:david).posts.create!(:title => "New on Edge") {|p| p.body = "More cool stuff!"}
    assert_equal post.title, "New on Edge"
    assert_equal post.body, "More cool stuff!"
  end

  def test_failed_reload_returns_nil
    p = setup_dangling_association
    assert_nil p.author.reload
  end

  def test_failed_reset_returns_nil
    p = setup_dangling_association
    assert_nil p.author.reset
  end

  def test_reload_returns_assocition
    david = developers(:david)
    assert_nothing_raised do
      assert_equal david.projects, david.projects.reload.reload
    end
  end

  if RUBY_VERSION < '1.9'
    def test_splat_does_not_invoke_to_a_on_singular_targets
      author = posts(:welcome).author
      author.reload.target.expects(:to_a).never
      [*author]
    end
  end

  def setup_dangling_association
    josh = Author.create(:name => "Josh")
    p = Post.create(:title => "New on Edge", :body => "More cool stuff!", :author => josh)
    josh.destroy
    p
  end
end

class OverridingAssociationsTest < ActiveRecord::TestCase
  class Person < ActiveRecord::Base; end
  class DifferentPerson < ActiveRecord::Base; end

  class PeopleList < ActiveRecord::Base
    has_and_belongs_to_many :has_and_belongs_to_many, :before_add => :enlist
    has_many :has_many, :before_add => :enlist
    belongs_to :belongs_to
    has_one :has_one
  end

  class DifferentPeopleList < PeopleList
    # Different association with the same name, callbacks should be omitted here.
    has_and_belongs_to_many :has_and_belongs_to_many, :class_name => 'DifferentPerson'
    has_many :has_many, :class_name => 'DifferentPerson'
    belongs_to :belongs_to, :class_name => 'DifferentPerson'
    has_one :has_one, :class_name => 'DifferentPerson'
  end

  def test_habtm_association_redefinition_callbacks_should_differ_and_not_inherited
    # redeclared association on AR descendant should not inherit callbacks from superclass
    callbacks = PeopleList.read_inheritable_attribute(:before_add_for_has_and_belongs_to_many)
    assert_equal([:enlist], callbacks)
    callbacks = DifferentPeopleList.read_inheritable_attribute(:before_add_for_has_and_belongs_to_many)
    assert_equal([], callbacks)
  end

  def test_has_many_association_redefinition_callbacks_should_differ_and_not_inherited
    # redeclared association on AR descendant should not inherit callbacks from superclass
    callbacks = PeopleList.read_inheritable_attribute(:before_add_for_has_many)
    assert_equal([:enlist], callbacks)
    callbacks = DifferentPeopleList.read_inheritable_attribute(:before_add_for_has_many)
    assert_equal([], callbacks)
  end

  def test_habtm_association_redefinition_reflections_should_differ_and_not_inherited
    assert_not_equal(
      PeopleList.reflect_on_association(:has_and_belongs_to_many),
      DifferentPeopleList.reflect_on_association(:has_and_belongs_to_many)
    )
  end

  def test_has_many_association_redefinition_reflections_should_differ_and_not_inherited
    assert_not_equal(
      PeopleList.reflect_on_association(:has_many),
      DifferentPeopleList.reflect_on_association(:has_many)
    )
  end

  def test_belongs_to_association_redefinition_reflections_should_differ_and_not_inherited
    assert_not_equal(
      PeopleList.reflect_on_association(:belongs_to),
      DifferentPeopleList.reflect_on_association(:belongs_to)
    )
  end

  def test_has_one_association_redefinition_reflections_should_differ_and_not_inherited
    assert_not_equal(
      PeopleList.reflect_on_association(:has_one),
      DifferentPeopleList.reflect_on_association(:has_one)
    )
  end
end