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rails--rails/activerecord/test/models/car.rb
Ryuta Kamizono e93f416abe Fix unscoping association scope on joins not to raise an error
#29589 changed merging scope order to allow to unscope default scopes on
association scope (#29611), but that caused a regression #38811 that
accidentally allow join constraint which is required.

```
% bin/test test/cases/associations/has_many_associations_test.rb -n test_unscopes_the_default_scope_of_associated_model_when_used_with_include
Run options: -n test_unscopes_the_default_scope_of_associated_model_when_used_with_include --seed 32978

# Running:

E

Error:
HasManyAssociationsTest#test_unscopes_the_default_scope_of_associated_model_when_used_with_include:
NoMethodError: undefined method `children' for nil:NilClass
    ~/rails/activerecord/lib/active_record/associations/join_dependency/join_association.rb:39:in `block in join_constraints'
    ~/rails/activerecord/lib/active_record/associations/join_dependency/join_association.rb:30:in `reverse_each'
    ~/rails/activerecord/lib/active_record/associations/join_dependency/join_association.rb:30:in `with_index'
    ~/rails/activerecord/lib/active_record/associations/join_dependency/join_association.rb:30:in `join_constraints'
    ~/rails/activerecord/lib/active_record/associations/join_dependency.rb:171:in `make_constraints'
    ~/rails/activerecord/lib/active_record/associations/join_dependency.rb:196:in `block in walk'
    ~/rails/activerecord/lib/active_record/associations/join_dependency.rb:196:in `each'
    ~/rails/activerecord/lib/active_record/associations/join_dependency.rb:196:in `flat_map'
    ~/rails/activerecord/lib/active_record/associations/join_dependency.rb:196:in `walk'
    ~/rails/activerecord/lib/active_record/associations/join_dependency.rb:90:in `block in join_constraints'
    ~/rails/activerecord/lib/active_record/associations/join_dependency.rb:87:in `each'
    ~/rails/activerecord/lib/active_record/associations/join_dependency.rb:87:in `flat_map'
    ~/rails/activerecord/lib/active_record/associations/join_dependency.rb:87:in `join_constraints'
    ~/rails/activerecord/lib/active_record/relation/query_methods.rb:1226:in `build_join_query'
    ~/rails/activerecord/lib/active_record/relation/query_methods.rb:1211:in `build_joins'
    ~/rails/activerecord/lib/active_record/relation/query_methods.rb:1091:in `build_arel'
    ~/rails/activerecord/lib/active_record/relation/query_methods.rb:1063:in `arel'
    ~/rails/activerecord/lib/active_record/relation/finder_methods.rb:419:in `block in limited_ids_for'
    ~/rails/activerecord/lib/active_record/relation.rb:867:in `skip_query_cache_if_necessary'
    ~/rails/activerecord/lib/active_record/relation/finder_methods.rb:419:in `limited_ids_for'
    ~/rails/activerecord/lib/active_record/relation/finder_methods.rb:398:in `apply_join_dependency'
    ~/rails/activerecord/lib/active_record/relation.rb:839:in `block in exec_queries'
    ~/rails/activerecord/lib/active_record/relation.rb:867:in `skip_query_cache_if_necessary'
    ~/rails/activerecord/lib/active_record/relation.rb:834:in `exec_queries'
    ~/rails/activerecord/lib/active_record/relation.rb:639:in `load'
    ~/rails/activerecord/lib/active_record/relation.rb:250:in `records'
    ~/rails/activerecord/lib/active_record/relation/finder_methods.rb:508:in `find_take'
    ~/rails/activerecord/lib/active_record/relation/finder_methods.rb:98:in `take'
    ~/rails/activerecord/lib/active_record/relation/finder_methods.rb:458:in `find_one'
    ~/rails/activerecord/lib/active_record/relation/finder_methods.rb:442:in `find_with_ids'
    ~/rails/activerecord/lib/active_record/relation/finder_methods.rb:69:in `find'
    ~/rails/activerecord/test/cases/associations/has_many_associations_test.rb:2689:in `block in <class:HasManyAssociationsTest>'

bin/test test/cases/associations/has_many_associations_test.rb:2683
```

Required join constraint should not be allowed to unscoping.

Fixes #38811.
2020-04-16 00:34:41 +09:00

36 lines
1.2 KiB
Ruby

# frozen_string_literal: true
class Car < ActiveRecord::Base
has_many :bulbs
has_many :all_bulbs, -> { unscope(where: :name) }, class_name: "Bulb"
has_many :all_bulbs2, -> { unscope(:where) }, class_name: "Bulb"
has_many :other_bulbs, -> { unscope(where: :name).where(name: "other") }, class_name: "Bulb"
has_many :old_bulbs, -> { rewhere(name: "old") }, class_name: "Bulb"
has_many :funky_bulbs, class_name: "FunkyBulb", dependent: :destroy
has_many :failed_bulbs, class_name: "FailedBulb", dependent: :destroy
has_many :foo_bulbs, -> { where(name: "foo") }, class_name: "Bulb"
has_many :awesome_bulbs, -> { awesome }, class_name: "Bulb"
has_one :bulb
has_many :tyres
has_many :engines, dependent: :destroy, inverse_of: :my_car
has_many :wheels, as: :wheelable, dependent: :destroy
has_many :price_estimates, as: :estimate_of
scope :incl_tyres, -> { includes(:tyres) }
scope :incl_engines, -> { includes(:engines) }
scope :order_using_new_style, -> { order("name asc") }
attribute :wheels_owned_at, :datetime, default: -> { Time.now }
end
class CoolCar < Car
default_scope { order("name desc") }
end
class FastCar < Car
default_scope { order("name desc") }
end