has_one_associations_test.rb

require "cases/helper"
require 'models/developer'
require 'models/project'
require 'models/company'
require 'models/ship'
require 'models/pirate'
require 'models/car'
require 'models/bulb'
require 'models/author'
require 'models/post'

class HasOneAssociationsTest < ActiveRecord::TestCase
  self.use_transactional_fixtures = false unless supports_savepoints?
  fixtures :accounts, :companies, :developers, :projects, :developers_projects, :ships, :pirates

  def setup
    Account.destroyed_account_ids.clear
  end

  def test_has_one
    assert_equal companies(:first_firm).account, Account.find(1)
    assert_equal Account.find(1).credit_limit, companies(:first_firm).account.credit_limit
  end

  def test_has_one_does_not_use_order_by
    ActiveRecord::SQLCounter.clear_log
    companies(:first_firm).account
  ensure
    assert ActiveRecord::SQLCounter.log_all.all? { |sql| /order by/i !~ sql }, 'ORDER BY was used in the query'
  end

  def test_has_one_cache_nils
    firm = companies(:another_firm)
    assert_queries(1) { assert_nil firm.account }
    assert_queries(0) { assert_nil firm.account }

    firms = Firm.all.merge!(:includes => :account).to_a
    assert_queries(0) { firms.each(&:account) }
  end

  def test_with_select
    assert_equal Firm.find(1).account_with_select.attributes.size, 2
    assert_equal Firm.all.merge!(:includes => :account_with_select).find(1).account_with_select.attributes.size, 2
  end

  def test_finding_using_primary_key
    firm = companies(:first_firm)
    assert_equal Account.find_by_firm_id(firm.id), firm.account
    firm.firm_id = companies(:rails_core).id
    assert_equal accounts(:rails_core_account), firm.account_using_primary_key
  end

  def test_update_with_foreign_and_primary_keys
    firm = companies(:first_firm)
    account = firm.account_using_foreign_and_primary_keys
    assert_equal Account.find_by_firm_name(firm.name), account
    firm.save
    firm.reload
    assert_equal account, firm.account_using_foreign_and_primary_keys
  end

  def test_can_marshal_has_one_association_with_nil_target
    firm = Firm.new
    assert_nothing_raised do
      assert_equal firm.attributes, Marshal.load(Marshal.dump(firm)).attributes
    end

    firm.account
    assert_nothing_raised do
      assert_equal firm.attributes, Marshal.load(Marshal.dump(firm)).attributes
    end
  end

  def test_proxy_assignment
    company = companies(:first_firm)
    assert_nothing_raised { company.account = company.account }
  end

  def test_type_mismatch
    assert_raise(ActiveRecord::AssociationTypeMismatch) { companies(:first_firm).account = 1 }
    assert_raise(ActiveRecord::AssociationTypeMismatch) { companies(:first_firm).account = Project.find(1) }
  end

  def test_natural_assignment
    apple = Firm.create("name" => "Apple")
    citibank = Account.create("credit_limit" => 10)
    apple.account = citibank
    assert_equal apple.id, citibank.firm_id
  end

  def test_natural_assignment_to_nil
    old_account_id = companies(:first_firm).account.id
    companies(:first_firm).account = nil
    companies(:first_firm).save
    assert_nil companies(:first_firm).account
    # account is dependent, therefore is destroyed when reference to owner is lost
    assert_raise(ActiveRecord::RecordNotFound) { Account.find(old_account_id) }
  end

  def test_nullification_on_association_change
    firm = companies(:rails_core)
    old_account_id = firm.account.id
    firm.account = Account.new(:credit_limit => 5)
    # account is dependent with nullify, therefore its firm_id should be nil
    assert_nil Account.find(old_account_id).firm_id
  end

  def test_natural_assignment_to_nil_after_destroy
    firm = companies(:rails_core)
    old_account_id = firm.account.id
    firm.account.destroy
    firm.account = nil
    assert_nil companies(:rails_core).account
    assert_raise(ActiveRecord::RecordNotFound) { Account.find(old_account_id) }
  end

  def test_association_change_calls_delete
    companies(:first_firm).deletable_account = Account.new(:credit_limit => 5)
    assert_equal [], Account.destroyed_account_ids[companies(:first_firm).id]
  end

  def test_association_change_calls_destroy
    companies(:first_firm).account = Account.new(:credit_limit => 5)
    assert_equal [companies(:first_firm).id], Account.destroyed_account_ids[companies(:first_firm).id]
  end

  def test_natural_assignment_to_already_associated_record
    company = companies(:first_firm)
    account = accounts(:signals37)
    assert_equal company.account, account
    company.account = account
    company.reload
    account.reload
    assert_equal company.account, account
  end

  def test_dependence
    num_accounts = Account.count

    firm = Firm.find(1)
    assert_not_nil firm.account
    account_id = firm.account.id
    assert_equal [], Account.destroyed_account_ids[firm.id]

    firm.destroy
    assert_equal num_accounts - 1, Account.count
    assert_equal [account_id], Account.destroyed_account_ids[firm.id]
  end

  def test_exclusive_dependence
    num_accounts = Account.count

    firm = ExclusivelyDependentFirm.find(9)
    assert_not_nil firm.account
    assert_equal [], Account.destroyed_account_ids[firm.id]

    firm.destroy
    assert_equal num_accounts - 1, Account.count
    assert_equal [], Account.destroyed_account_ids[firm.id]
  end

  def test_dependence_with_nil_associate
    firm = DependentFirm.new(:name => 'nullify')
    firm.save!
    assert_nothing_raised { firm.destroy }
  end

  def test_restrict_with_exception
    firm = RestrictedWithExceptionFirm.create!(:name => 'restrict')
    firm.create_account(:credit_limit => 10)

    assert_not_nil firm.account

    assert_raise(ActiveRecord::DeleteRestrictionError) { firm.destroy }
    assert RestrictedWithExceptionFirm.exists?(:name => 'restrict')
    assert firm.account.present?
  end

  def test_restrict_with_error
    firm = RestrictedWithErrorFirm.create!(:name => 'restrict')
    firm.create_account(:credit_limit => 10)

    assert_not_nil firm.account

    firm.destroy

    assert !firm.errors.empty?
    assert_equal "Cannot delete record because a dependent account exists", firm.errors[:base].first
    assert RestrictedWithErrorFirm.exists?(:name => 'restrict')
    assert firm.account.present?
  end

  def test_successful_build_association
    firm = Firm.new("name" => "GlobalMegaCorp")
    firm.save

    account = firm.build_account("credit_limit" => 1000)
    assert account.save
    assert_equal account, firm.account
  end

  def test_build_association_dont_create_transaction
    assert_no_queries {
      Firm.new.build_account
    }
  end

  def test_building_the_associated_object_with_implicit_sti_base_class
    firm = DependentFirm.new
    company = firm.build_company
    assert_kind_of Company, company, "Expected #{company.class} to be a Company"
  end

  def test_building_the_associated_object_with_explicit_sti_base_class
    firm = DependentFirm.new
    company = firm.build_company(:type => "Company")
    assert_kind_of Company, company, "Expected #{company.class} to be a Company"
  end

  def test_building_the_associated_object_with_sti_subclass
    firm = DependentFirm.new
    company = firm.build_company(:type => "Client")
    assert_kind_of Client, company, "Expected #{company.class} to be a Client"
  end

  def test_building_the_associated_object_with_an_invalid_type
    firm = DependentFirm.new
    assert_raise(ActiveRecord::SubclassNotFound) { firm.build_company(:type => "Invalid") }
  end

  def test_building_the_associated_object_with_an_unrelated_type
    firm = DependentFirm.new
    assert_raise(ActiveRecord::SubclassNotFound) { firm.build_company(:type => "Account") }
  end

  def test_build_and_create_should_not_happen_within_scope
    pirate = pirates(:blackbeard)
    scoped_count = pirate.association(:foo_bulb).scope.where_values.count

    bulb = pirate.build_foo_bulb
    assert_not_equal scoped_count, bulb.scope_after_initialize.where_values.count

    bulb = pirate.create_foo_bulb
    assert_not_equal scoped_count, bulb.scope_after_initialize.where_values.count

    bulb = pirate.create_foo_bulb!
    assert_not_equal scoped_count, bulb.scope_after_initialize.where_values.count
  end

  def test_create_association
    firm = Firm.create(:name => "GlobalMegaCorp")
    account = firm.create_account(:credit_limit => 1000)
    assert_equal account, firm.reload.account
  end

  def test_create_association_with_bang
    firm = Firm.create(:name => "GlobalMegaCorp")
    account = firm.create_account!(:credit_limit => 1000)
    assert_equal account, firm.reload.account
  end

  def test_create_association_with_bang_failing
    firm = Firm.create(:name => "GlobalMegaCorp")
    assert_raise ActiveRecord::RecordInvalid do
      firm.create_account!
    end
    account = firm.account
    assert_not_nil account
    account.credit_limit = 5
    account.save
    assert_equal account, firm.reload.account
  end

  def test_build
    firm = Firm.new("name" => "GlobalMegaCorp")
    firm.save

    firm.account = account = Account.new("credit_limit" => 1000)
    assert_equal account, firm.account
    assert account.save
    assert_equal account, firm.account
  end

  def test_create
    firm = Firm.new("name" => "GlobalMegaCorp")
    firm.save
    firm.account = account = Account.create("credit_limit" => 1000)
    assert_equal account, firm.account
  end

  def test_create_before_save
    firm = Firm.new("name" => "GlobalMegaCorp")
    firm.account = account = Account.create("credit_limit" => 1000)
    assert_equal account, firm.account
  end

  def test_dependence_with_missing_association
    Account.destroy_all
    firm = Firm.find(1)
    assert_nil firm.account
    firm.destroy
  end

  def test_dependence_with_missing_association_and_nullify
    Account.destroy_all
    firm = DependentFirm.first
    assert_nil firm.account
    firm.destroy
  end

  def test_finding_with_interpolated_condition
    firm = Firm.first
    superior = firm.clients.create(:name => 'SuperiorCo')
    superior.rating = 10
    superior.save
    assert_equal 10, firm.clients_with_interpolated_conditions.first.rating
  end

  def test_assignment_before_child_saved
    firm = Firm.find(1)
    firm.account = a = Account.new("credit_limit" => 1000)
    assert a.persisted?
    assert_equal a, firm.account
    assert_equal a, firm.account
    assert_equal a, firm.account(true)
  end

  def test_save_still_works_after_accessing_nil_has_one
    jp = Company.new :name => 'Jaded Pixel'
    jp.dummy_account.nil?

    assert_nothing_raised do
      jp.save!
    end
  end

  def test_cant_save_readonly_association
    assert_raise(ActiveRecord::ReadOnlyRecord) { companies(:first_firm).readonly_account.save!  }
    assert companies(:first_firm).readonly_account.readonly?
  end

  def test_has_one_proxy_should_not_respond_to_private_methods
    assert_raise(NoMethodError) { accounts(:signals37).private_method }
    assert_raise(NoMethodError) { companies(:first_firm).account.private_method }
  end

  def test_has_one_proxy_should_respond_to_private_methods_via_send
    accounts(:signals37).send(:private_method)
    companies(:first_firm).account.send(:private_method)
  end

  def test_save_of_record_with_loaded_has_one
    @firm = companies(:first_firm)
    assert_not_nil @firm.account

    assert_nothing_raised do
      Firm.find(@firm.id).save!
      Firm.all.merge!(:includes => :account).find(@firm.id).save!
    end

    @firm.account.destroy

    assert_nothing_raised do
      Firm.find(@firm.id).save!
      Firm.all.merge!(:includes => :account).find(@firm.id).save!
    end
  end

  def test_build_respects_hash_condition
    account = companies(:first_firm).build_account_limit_500_with_hash_conditions
    assert account.save
    assert_equal 500, account.credit_limit
  end

  def test_create_respects_hash_condition
    account = companies(:first_firm).create_account_limit_500_with_hash_conditions
    assert       account.persisted?
    assert_equal 500, account.credit_limit
  end

  def test_attributes_are_being_set_when_initialized_from_has_one_association_with_where_clause
    new_account = companies(:first_firm).build_account(:firm_name => 'Account')
    assert_equal new_account.firm_name, "Account"
  end

  def test_creation_failure_without_dependent_option
    pirate = pirates(:blackbeard)
    orig_ship = pirate.ship

    assert_equal ships(:black_pearl), orig_ship
    new_ship = pirate.create_ship
    assert_not_equal ships(:black_pearl), new_ship
    assert_equal new_ship, pirate.ship
    assert new_ship.new_record?
    assert_nil orig_ship.pirate_id
    assert !orig_ship.changed? # check it was saved
  end

  def test_creation_failure_with_dependent_option
    pirate = pirates(:blackbeard).becomes(DestructivePirate)
    orig_ship = pirate.dependent_ship

    new_ship = pirate.create_dependent_ship
    assert new_ship.new_record?
    assert orig_ship.destroyed?
  end

  def test_creation_failure_due_to_new_record_should_raise_error
    pirate = pirates(:redbeard)
    new_ship = Ship.new

    assert_raise(ActiveRecord::RecordNotSaved) do
      pirate.ship = new_ship
    end
    assert_nil pirate.ship
    assert_nil new_ship.pirate_id
  end

  def test_replacement_failure_due_to_existing_record_should_raise_error
    pirate = pirates(:blackbeard)
    pirate.ship.name = nil

    assert !pirate.ship.valid?
    assert_raise(ActiveRecord::RecordNotSaved) do
      pirate.ship = ships(:interceptor)
    end
    assert_equal ships(:black_pearl), pirate.ship
    assert_equal pirate.id, pirate.ship.pirate_id
  end

  def test_replacement_failure_due_to_new_record_should_raise_error
    pirate = pirates(:blackbeard)
    new_ship = Ship.new

    assert_raise(ActiveRecord::RecordNotSaved) do
      pirate.ship = new_ship
    end
    assert_equal ships(:black_pearl), pirate.ship
    assert_equal pirate.id, pirate.ship.pirate_id
    assert_equal pirate.id, ships(:black_pearl).reload.pirate_id
    assert_nil new_ship.pirate_id
  end

  def test_association_keys_bypass_attribute_protection
    car = Car.create(:name => 'honda')

    bulb = car.build_bulb
    assert_equal car.id, bulb.car_id

    bulb = car.build_bulb :car_id => car.id + 1
    assert_equal car.id, bulb.car_id

    bulb = car.create_bulb
    assert_equal car.id, bulb.car_id

    bulb = car.create_bulb :car_id => car.id + 1
    assert_equal car.id, bulb.car_id
  end

  def test_association_protect_foreign_key
    pirate = Pirate.create!(:catchphrase => "Don' botharrr talkin' like one, savvy?")

    ship = pirate.build_ship
    assert_equal pirate.id, ship.pirate_id

    ship = pirate.build_ship :pirate_id => pirate.id + 1
    assert_equal pirate.id, ship.pirate_id

    ship = pirate.create_ship
    assert_equal pirate.id, ship.pirate_id

    ship = pirate.create_ship :pirate_id => pirate.id + 1
    assert_equal pirate.id, ship.pirate_id
  end

  def test_build_with_block
    car = Car.create(:name => 'honda')

    bulb = car.build_bulb{ |b| b.color = 'Red' }
    assert_equal 'RED!', bulb.color
  end

  def test_create_with_block
    car = Car.create(:name => 'honda')

    bulb = car.create_bulb{ |b| b.color = 'Red' }
    assert_equal 'RED!', bulb.color
  end

  def test_create_bang_with_block
    car = Car.create(:name => 'honda')

    bulb = car.create_bulb!{ |b| b.color = 'Red' }
    assert_equal 'RED!', bulb.color
  end

  def test_association_attributes_are_available_to_after_initialize
    car = Car.create(:name => 'honda')
    bulb = car.create_bulb

    assert_equal car.id, bulb.attributes_after_initialize['car_id']
  end

  def test_has_one_transaction
    company = companies(:first_firm)
    account = Account.find(1)

    company.account # force loading
    assert_no_queries { company.account = account }

    company.account = nil
    assert_no_queries { company.account = nil }
    account = Account.find(2)
    assert_queries { company.account = account }

    assert_no_queries { Firm.new.account = account }
  end

  def test_has_one_assignment_dont_trigger_save_on_change_of_same_object
    pirate = Pirate.create!(catchphrase: "Don' botharrr talkin' like one, savvy?")
    ship = pirate.build_ship(name: 'old name')
    ship.save!

    ship.name = 'new name'
    assert ship.changed?
    assert_queries(1) do
      # One query for updating name, not triggering query for updating pirate_id
      pirate.ship = ship
    end

    assert_equal 'new name', pirate.ship.reload.name
  end

  def test_has_one_assignment_triggers_save_on_change_on_replacing_object
    pirate = Pirate.create!(catchphrase: "Don' botharrr talkin' like one, savvy?")
    ship = pirate.build_ship(name: 'old name')
    ship.save!

    new_ship = Ship.create(name: 'new name')
    assert_queries(2) do
      # One query for updating name and second query for updating pirate_id
      pirate.ship = new_ship
    end

    assert_equal 'new name', pirate.ship.reload.name
  end

  def test_has_one_autosave_with_primary_key_manually_set
    post = Post.create(id: 1234, title: "Some title", body: 'Some content')
    author = Author.new(id: 33, name: 'Hank Moody')

    author.post = post
    author.save
    author.reload

    assert_not_nil author.post
    assert_equal author.post, post
  end

  def test_has_one_relationship_cannot_have_a_counter_cache
    assert_raise(ArgumentError) do
      Class.new(ActiveRecord::Base) do
        has_one :thing, counter_cache: true
      end
    end
  end

  test 'dangerous association name raises ArgumentError' do
    [:errors, 'errors', :save, 'save'].each do |name|
      assert_raises(ArgumentError, "Association #{name} should not be allowed") do
        Class.new(ActiveRecord::Base) do
          has_one name
        end
      end
    end
  end
end