aboutsummaryrefslogtreecommitdiffstats
path: root/activerecord/test/cases/serialized_attribute_test.rb
blob: 1ccbf3ed4a950792a53f02d9a35eb7b056ba9f0f (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
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
require "cases/helper"
require "models/topic"
require "models/reply"
require "models/person"
require "models/traffic_light"
require "models/post"
require "bcrypt"

class SerializedAttributeTest < ActiveRecord::TestCase
  fixtures :topics, :posts

  MyObject = Struct.new :attribute1, :attribute2

  teardown do
    Topic.serialize("content")
  end

  def test_serialize_does_not_eagerly_load_columns
    Topic.reset_column_information
    assert_no_queries do
      Topic.serialize(:content)
    end
  end

  def test_serialized_attribute
    Topic.serialize("content", MyObject)

    myobj = MyObject.new("value1", "value2")
    topic = Topic.create("content" => myobj)
    assert_equal(myobj, topic.content)

    topic.reload
    assert_equal(myobj, topic.content)
  end

  def test_serialized_attribute_in_base_class
    Topic.serialize("content", Hash)

    hash = { "content1" => "value1", "content2" => "value2" }
    important_topic = ImportantTopic.create("content" => hash)
    assert_equal(hash, important_topic.content)

    important_topic.reload
    assert_equal(hash, important_topic.content)
  end

  def test_serialized_attributes_from_database_on_subclass
    Topic.serialize :content, Hash

    t = Reply.new(content: { foo: :bar })
    assert_equal({ foo: :bar }, t.content)
    t.save!
    t = Reply.last
    assert_equal({ foo: :bar }, t.content)
  end

  def test_serialized_attribute_calling_dup_method
    Topic.serialize :content, JSON

    orig = Topic.new(content: { foo: :bar })
    clone = orig.dup
    assert_equal(orig.content, clone.content)
  end

  def test_serialized_json_attribute_returns_unserialized_value
    Topic.serialize :content, JSON
    my_post = posts(:welcome)

    t = Topic.new(content: my_post)
    t.save!
    t.reload

    assert_instance_of(Hash, t.content)
    assert_equal(my_post.id, t.content["id"])
    assert_equal(my_post.title, t.content["title"])
  end

  def test_json_read_legacy_null
    Topic.serialize :content, JSON

    # Force a row to have a JSON "null" instead of a database NULL (this is how
    # null values are saved on 4.1 and before)
    id = Topic.connection.insert "INSERT INTO topics (content) VALUES('null')"
    t = Topic.find(id)

    assert_nil t.content
  end

  def test_json_read_db_null
    Topic.serialize :content, JSON

    # Force a row to have a database NULL instead of a JSON "null"
    id = Topic.connection.insert "INSERT INTO topics (content) VALUES(NULL)"
    t = Topic.find(id)

    assert_nil t.content
  end

  def test_serialized_attribute_declared_in_subclass
    hash = { "important1" => "value1", "important2" => "value2" }
    important_topic = ImportantTopic.create("important" => hash)
    assert_equal(hash, important_topic.important)

    important_topic.reload
    assert_equal(hash, important_topic.important)
    assert_equal(hash, important_topic.read_attribute(:important))
  end

  def test_serialized_time_attribute
    myobj = Time.local(2008, 1, 1, 1, 0)
    topic = Topic.create("content" => myobj).reload
    assert_equal(myobj, topic.content)
  end

  def test_serialized_string_attribute
    myobj = "Yes"
    topic = Topic.create("content" => myobj).reload
    assert_equal(myobj, topic.content)
  end

  def test_nil_serialized_attribute_without_class_constraint
    topic = Topic.new
    assert_nil topic.content
  end

  def test_nil_not_serialized_without_class_constraint
    assert Topic.new(content: nil).save
    assert_equal 1, Topic.where(content: nil).count
  end

  def test_nil_not_serialized_with_class_constraint
    Topic.serialize :content, Hash
    assert Topic.new(content: nil).save
    assert_equal 1, Topic.where(content: nil).count
  end

  def test_serialized_attribute_should_raise_exception_on_assignment_with_wrong_type
    Topic.serialize(:content, Hash)
    assert_raise(ActiveRecord::SerializationTypeMismatch) do
      Topic.new(content: "string")
    end
  end

  def test_should_raise_exception_on_serialized_attribute_with_type_mismatch
    myobj = MyObject.new("value1", "value2")
    topic = Topic.new(content: myobj)
    assert topic.save
    Topic.serialize(:content, Hash)
    assert_raise(ActiveRecord::SerializationTypeMismatch) { Topic.find(topic.id).content }
  end

  def test_serialized_attribute_with_class_constraint
    settings = { "color" => "blue" }
    Topic.serialize(:content, Hash)
    topic = Topic.new(content: settings)
    assert topic.save
    assert_equal(settings, Topic.find(topic.id).content)
  end

  def test_where_by_serialized_attribute_with_hash
    settings = { "color" => "green" }
    Topic.serialize(:content, Hash)
    topic = Topic.create!(content: settings)
    assert_equal topic, Topic.where(content: settings).take
  end

  def test_serialized_default_class
    Topic.serialize(:content, Hash)
    topic = Topic.new
    assert_equal Hash, topic.content.class
    assert_equal Hash, topic.read_attribute(:content).class
    topic.content["beer"] = "MadridRb"
    assert topic.save
    topic.reload
    assert_equal Hash, topic.content.class
    assert_equal "MadridRb", topic.content["beer"]
  end

  def test_serialized_no_default_class_for_object
    topic = Topic.new
    assert_nil topic.content
  end

  def test_serialized_boolean_value_true
    topic = Topic.new(content: true)
    assert topic.save
    topic = topic.reload
    assert_equal topic.content, true
  end

  def test_serialized_boolean_value_false
    topic = Topic.new(content: false)
    assert topic.save
    topic = topic.reload
    assert_equal topic.content, false
  end

  def test_serialize_with_coder
    some_class = Struct.new(:foo) do
      def self.dump(value)
        value.foo
      end

      def self.load(value)
        new(value)
      end
    end

    Topic.serialize(:content, some_class)
    topic = Topic.new(content: some_class.new("my value"))
    topic.save!
    topic.reload
    assert_kind_of some_class, topic.content
    assert_equal topic.content, some_class.new("my value")
  end

  def test_serialize_attribute_via_select_method_when_time_zone_available
    with_timezone_config aware_attributes: true do
      Topic.serialize(:content, MyObject)

      myobj = MyObject.new("value1", "value2")
      topic = Topic.create(content: myobj)

      assert_equal(myobj, Topic.select(:content).find(topic.id).content)
      assert_raise(ActiveModel::MissingAttributeError) { Topic.select(:id).find(topic.id).content }
    end
  end

  def test_serialize_attribute_can_be_serialized_in_an_integer_column
    insures = ["life"]
    person = SerializedPerson.new(first_name: "David", insures: insures)
    assert person.save
    person = person.reload
    assert_equal(insures, person.insures)
  end

  def test_regression_serialized_default_on_text_column_with_null_false
    light = TrafficLight.new
    assert_equal [], light.state
    assert_equal [], light.long_state
  end

  def test_serialized_column_should_unserialize_after_update_column
    t = Topic.create(content: "first")
    assert_equal("first", t.content)

    t.update_column(:content, ["second"])
    assert_equal(["second"], t.content)
    assert_equal(["second"], t.reload.content)
  end

  def test_serialized_column_should_unserialize_after_update_attribute
    t = Topic.create(content: "first")
    assert_equal("first", t.content)

    t.update_attribute(:content, "second")
    assert_equal("second", t.content)
    assert_equal("second", t.reload.content)
  end

  def test_nil_is_not_changed_when_serialized_with_a_class
    Topic.serialize(:content, Array)

    topic = Topic.new(content: nil)

    assert_not topic.content_changed?
  end

  def test_classes_without_no_arg_constructors_are_not_supported
    assert_raises(ArgumentError) do
      Topic.serialize(:content, Regexp)
    end
  end

  def test_newly_emptied_serialized_hash_is_changed
    Topic.serialize(:content, Hash)
    topic = Topic.create(content: { "things" => "stuff" })
    topic.content.delete("things")
    topic.save!
    topic.reload

    assert_equal({}, topic.content)
  end

  def test_values_cast_from_nil_are_persisted_as_nil
    # This is required to fulfil the following contract, which must be universally
    # true in Active Record:
    #
    # model.attribute = value
    # assert_equal model.attribute, model.tap(&:save).reload.attribute
    Topic.serialize(:content, Hash)
    topic = Topic.create!(content: {})
    topic2 = Topic.create!(content: nil)

    assert_equal [topic, topic2], Topic.where(content: nil)
  end

  def test_nil_is_always_persisted_as_null
    Topic.serialize(:content, Hash)

    topic = Topic.create!(content: { foo: "bar" })
    topic.update_attribute :content, nil
    assert_equal [topic], Topic.where(content: nil)
  end

  def test_mutation_detection_does_not_double_serialize
    coder = Object.new
    def coder.dump(value)
      return if value.nil?
      value + " encoded"
    end
    def coder.load(value)
      return if value.nil?
      value.gsub(" encoded", "")
    end
    type = Class.new(ActiveModel::Type::Value) do
      include ActiveModel::Type::Helpers::Mutable

      def serialize(value)
        return if value.nil?
        value + " serialized"
      end

      def deserialize(value)
        return if value.nil?
        value.gsub(" serialized", "")
      end
    end.new
    model = Class.new(Topic) do
      attribute :foo, type
      serialize :foo, coder
    end

    topic = model.create!(foo: "bar")
    topic.foo
    refute topic.changed?
  end
end