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rails--rails/activerecord/test/cases/serialized_attribute_test.rb
2019-09-15 03:05:52 +09:00

401 lines
11 KiB
Ruby

# frozen_string_literal: true
require "cases/helper"
require "models/person"
require "models/traffic_light"
require "models/post"
class SerializedAttributeTest < ActiveRecord::TestCase
fixtures :topics, :posts
MyObject = Struct.new :attribute1, :attribute2
class Topic < ActiveRecord::Base
serialize :content
end
class ImportantTopic < Topic
serialize :important, Hash
end
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 = ImportantTopic.new(content: { foo: :bar })
assert_equal({ foo: :bar }, t.content)
t.save!
t = ImportantTopic.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_array
settings = [ "color" => "green" ]
Topic.serialize(:content, Array)
topic = Topic.create!(content: settings)
assert_equal topic, Topic.where(content: settings).take
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_where_by_serialized_attribute_with_hash_in_array
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 true, topic.content
end
def test_serialized_boolean_value_false
topic = Topic.new(content: false)
assert topic.save
topic = topic.reload
assert_equal false, topic.content
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 some_class.new("my value"), topic.content
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_unexpected_serialized_type
Topic.serialize :content, Hash
topic = Topic.create!(content: { zomg: true })
Topic.serialize :content, Array
topic.reload
error = assert_raise(ActiveRecord::SerializationTypeMismatch) do
topic.content
end
expected = "can't load `content`: was supposed to be a Array, but was a Hash. -- {:zomg=>true}"
assert_equal expected, error.to_s
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_predicate 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).sort_by(&:id)
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
assert_not_predicate topic, :changed?
end
def test_serialized_attribute_works_under_concurrent_initial_access
model = Class.new(Topic)
topic = model.create!
topic.update group: "1"
model.serialize :group, JSON
model.reset_column_information
# This isn't strictly necessary for the test, but a little bit of
# knowledge of internals allows us to make failures far more likely.
model.define_singleton_method(:define_attribute) do |*args, **options|
Thread.pass
super(*args, **options)
end
threads = 4.times.map do
Thread.new do
topic.reload.group
end
end
# All the threads should retrieve the value knowing it is JSON, and
# thus decode it. If this fails, some threads will instead see the
# raw string ("1"), or raise an exception.
assert_equal [1] * threads.size, threads.map(&:value)
end
end