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rails--rails/activerecord/test/models
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Dinah Shi 2a3f1757dd Add available_records argument to Associations::Preloader 
Sometimes when we are preloading associations on records, we already have
the association objects loaded in-memory. But the Preloader will go to the
database to fetch them anyways because there is no way to tell it about
these loaded objects. This PR adds a new `available_records` argument to
supply the Preloader with a set of in-memory records that it can use to
fill associations without making a database query.

`available_records` is an array of ActiveRecord::Base objects. Mixed
models are supported. Preloader will use these records to try to fill the
requested associations before querying the database. This can save database
queries by reusing in-memory objects.

The optimization is only applied to single associations (i.e. :belongs_to,
:has_one) as we must query the database to do an exhaustive lookup for
collections (i.e. :has_many). It also requires the query to have no scopes
as scopes can filter associations even if they are already in memory.

```ruby
comment = Comment.last
post = Post.find_by(id: comment.post_id)
all_authors = Author.all.to_a

Preloader.new([comment], [:post, :author]).call

Preloader.new([comment], [:post, :author], available_records: [post, all_authors]).call
```

Co-Authored-By: John Hawthorn <john@hawthorn.email>
2021-07-14 08:44:03 -04:00
..
admin Update prefix and allow suffix options for store accessors 2018-06-12 07:10:09 -07:00
autoloadable Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
publisher Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
account.rb Ensure Contextual validations fire on associations 2019-10-04 12:17:53 +01:00
admin.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
aircraft.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
arunit2_model.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
author.rb Clean up checks to see if DidYouMean is defined 2021-07-04 13:43:50 +02:00
author_encrypted.rb Add support for uniqueness validations 2021-04-01 15:02:15 +02:00
auto_id.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
binary.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
binary_field.rb Handle binary strings in Active Record serialized columns 2020-10-14 11:57:34 +02:00
bird.rb Revert "Merge pull request #35186 from kamipo/fix_leaking_scope_on_relation_create" 2019-02-15 12:06:45 +09:00
book.rb Extract encrypted models to their own files 2021-04-01 15:02:14 +02:00
book_destroy_async.rb Destroy associations in a background job. 2020-09-24 14:24:15 -04:00
book_encrypted.rb Add new "encrypted_books" table to the schema 2021-04-03 08:00:01 -04:00
boolean.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
bulb.rb Implicit scoping does no longer leak scope to class level querying methods 2020-10-30 00:25:38 +00:00
cake_designer.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
car.rb Fix unscoping association scope on joins not to raise an error 2020-04-16 00:34:41 +09:00
carrier.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
cart.rb Don't over protect the MySQL users on insert_all 2020-11-04 20:26:22 +00:00
cat.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
categorization.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
category.rb Remove unused Category.has_and_belongs_to_many :popular_grouped_posts definition 2021-04-12 15:05:42 +09:00
chef.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
citation.rb Fix has_many_inversing with touch: true on a belongs_to association with inverse 2021-01-07 22:15:24 +00:00
club.rb chore: fix spelling change favourite to the more used favorite 2021-04-12 12:35:12 +10:00
college.rb Removes require_dependency from the AR test suite 2020-05-06 09:01:38 +02:00
column.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
column_name.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
comment.rb Add option to skip joins for associations. 2021-04-19 11:17:31 -04:00
company.rb Avoid stack level too deep in predicate builder 2021-02-11 11:32:20 -05:00
company_in_module.rb Enable Layout/EmptyLinesAroundAccessModifier cop 2019-06-13 12:00:45 +09:00
computer.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
contact.rb Deduplicate various Active Record schema cache structures 2019-06-03 13:31:42 +02:00
content.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
contract.rb Fix complicated has_many through with nested where condition 2021-01-05 11:40:04 +09:00
country.rb create_table with :primary_key option has no effect if id: false is given 2018-10-27 22:57:16 +09:00
course.rb Removes require_dependency from the AR test suite 2020-05-06 09:01:38 +02:00
customer.rb Fix composed_of with symbol mapping 2020-12-15 20:06:23 +09:00
customer_carrier.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
dashboard.rb Revert "Refactor uncastable through reflection test to detect join key overrides" 2020-09-25 17:49:52 -04:00
default.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
department.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
destroy_async_parent.rb Destroy associations in a background job. 2020-09-24 14:24:15 -04:00
destroy_async_parent_soft_delete.rb Destroy associations in a background job. 2020-09-24 14:24:15 -04:00
developer.rb Handle false in relation strict loading checks 2021-03-16 16:26:59 -04:00
discount.rb Reproduce the preloader regression in #41596 2021-03-15 12:36:21 -07:00
dl_keyed_belongs_to.rb Destroy associations in a background job. 2020-09-24 14:24:15 -04:00
dl_keyed_belongs_to_soft_delete.rb Destroy associations in a background job. 2020-09-24 14:24:15 -04:00
dl_keyed_has_many.rb Destroy associations in a background job. 2020-09-24 14:24:15 -04:00
dl_keyed_has_many_through.rb Destroy associations in a background job. 2020-09-24 14:24:15 -04:00
dl_keyed_has_one.rb Destroy associations in a background job. 2020-09-24 14:24:15 -04:00
dl_keyed_join.rb Destroy associations in a background job. 2020-09-24 14:24:15 -04:00
dog.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
dog_lover.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
doubloon.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
drink_designer.rb Polymorphic has_one touch: Reset association cache result after create transaction 2019-07-31 05:59:23 +02:00
edge.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
electron.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
engine.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
entrant.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
entry.rb Add delegated type to Active Record (#39341) 2020-05-23 15:14:40 -07:00
essay.rb Add available_records argument to Associations::Preloader 2021-07-14 08:44:03 -04:00
essay_destroy_async.rb Handle STI models for has_many dependent: :destroy_async 2021-01-06 02:04:23 +01:00
event.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
eye.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
face.rb Clean up checks to see if DidYouMean is defined 2021-07-04 13:43:50 +02:00
family.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
family_tree.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
friendship.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
frog.rb Merge pull request #30956 from CJStadler/with-lock-changed-deprecation 2018-03-28 13:11:01 -04:00
guid.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
guitar.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
hotel.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
human.rb Clean up checks to see if DidYouMean is defined 2021-07-04 13:43:50 +02:00
image.rb :polymorphic, :as, and :foreign_type are valid for polymorphic association 2019-11-10 10:54:58 +09:00
interest.rb Replace test Man with Human 2020-08-14 11:37:09 -04:00
invoice.rb Deprecates Enumerable#sum and Array#sum 2021-05-03 10:26:39 -07:00
item.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
job.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
joke.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
keyboard.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
legacy_thing.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
lesson.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
line_item.rb Reproduce the preloader regression in #41596 2021-03-15 12:36:21 -07:00
liquid.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
matey.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
measurement.rb This PR adds support to retrieve partitioned indexes when asking for 2020-02-06 07:36:44 +02:00
member.rb Fix disable_joins when using an enum STI type 2021-06-24 14:30:00 -04:00
member_detail.rb Using existing models for building multiple has_one through tests 2018-04-22 04:16:44 +09:00
member_type.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
membership.rb allow table name and direction in string order arg 2017-11-09 22:41:33 +10:30
mentor.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
message.rb Add delegated type to Active Record (#39341) 2020-05-23 15:14:40 -07:00
minimalistic.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
minivan.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
mixed_case_monkey.rb Replace test Man with Human 2020-08-14 11:37:09 -04:00
molecule.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
mouse.rb Don't validate non dirty association targets 2019-07-15 18:21:20 +01:00
movie.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
node.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
non_primary_key.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
notification.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
numeric_data.rb Fix read_attribute_before_type_cast to consider attribute aliases 2020-10-18 20:32:47 -03:00
order.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
organization.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
other_dog.rb Removes require_dependency from the AR test suite 2020-05-06 09:01:38 +02:00
owner.rb try using regexes 2017-11-09 22:42:15 +10:30
parrot.rb Don't like to add extra models/tables/fixtures, use existing those 2021-02-25 11:32:44 +09:00
person.rb chore: fix spelling change favourite to the more used favorite 2021-04-12 12:35:12 +10:00
personal_legacy_thing.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
pet.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
pet_treasure.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
pirate.rb Ensure Contextual validations fire on associations 2019-10-04 12:17:53 +01:00
possession.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
post.rb Derive foreign key from model name in has_many associations 2021-05-12 15:21:31 -04:00
post_encrypted.rb Extract encrypted models to their own files 2021-04-01 15:02:14 +02:00
price_estimate.rb Fix numericality validator not to be affected by custom getter 2018-08-13 23:28:46 +09:00
professor.rb Removes require_dependency from the AR test suite 2020-05-06 09:01:38 +02:00
project.rb Fix disable_joins when foreign key is not ID 2021-06-10 16:29:34 -04:00
publisher.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
randomly_named_c1.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
rating.rb Maintain extra joins for string or complex arel conditions 2019-10-04 13:29:18 +09:00
reader.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
recipe.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
record.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
reference.rb chore: fix spelling change favourite to the more used favorite 2021-04-12 12:35:12 +10:00
reply.rb Allow attribute aliases for validates_uniqueness_of 2020-06-01 22:44:39 +09:00
room.rb Fixed odd behavior of inverse_of with multiple belongs_to to same class 2020-11-21 02:06:21 +09:00
section.rb Fix circular autosave: true 2018-07-23 14:53:27 -07:00
seminar.rb Fix circular autosave: true 2018-07-23 14:53:27 -07:00
session.rb Fix circular autosave: true 2018-07-23 14:53:27 -07:00
ship.rb Ensure Contextual validations fire on associations 2019-10-04 12:17:53 +01:00
ship_part.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
shipping_line.rb Reproduce the preloader regression in #41596 2021-03-15 12:36:21 -07:00
shop.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
shop_account.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
speedometer.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
sponsor.rb Make reflection.klass raise if polymorphic? not to be misused 2018-02-19 00:11:29 +09:00
squeak.rb Don't validate non dirty association targets 2019-07-15 18:21:20 +01:00
strict_zine.rb Ignore strict loading violations on instances loaded through fixtures 2020-12-10 15:23:14 -06:00
string_key_object.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
student.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
subscriber.rb Revert "Refactor uncastable through reflection test to detect join key overrides" 2020-09-25 17:49:52 -04:00
subscription.rb Revert "Refactor uncastable through reflection test to detect join key overrides" 2020-09-25 17:49:52 -04:00
tag.rb Fix newly added reflection order when redefining association 2018-01-04 22:55:16 +09:00
tagging.rb Don't update counter cache when through record was not destroyed 2018-01-14 20:46:19 +00:00
task.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
topic.rb Implicit scoping does no longer leak scope to class level querying methods 2020-10-30 00:25:38 +00:00
toy.rb Fix has_many_inversing with touch: true on a belongs_to association with inverse 2021-01-07 22:15:24 +00:00
traffic_light.rb Extract encrypted models to their own files 2021-04-01 15:02:14 +02:00
traffic_light_encrypted.rb Extract encrypted models to their own files 2021-04-01 15:02:14 +02:00
treasure.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
treaty.rb create_table with :primary_key option has no effect if id: false is given 2018-10-27 22:57:16 +09:00
tree.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
tuning_peg.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
tyre.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
user.rb Fixed odd behavior of inverse_of with multiple belongs_to to same class 2020-11-21 02:06:21 +09:00
user_with_invalid_relation.rb compute_class raise when klass is not ActiveRecord::Base subclass 2020-12-14 14:49:14 +01:00
uuid_child.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
uuid_comment.rb Allow delegated_type to be specified primary_key and foreign_key 2020-12-18 15:06:16 +09:00
uuid_entry.rb Allow delegated_type to be specified primary_key and foreign_key 2020-12-18 15:06:16 +09:00
uuid_item.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
uuid_message.rb Allow delegated_type to be specified primary_key and foreign_key 2020-12-18 15:06:16 +09:00
uuid_parent.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
vegetables.rb move ActiveRecord::Persistance#becomes logic into initialize block 2020-09-20 10:24:19 -06:00
vertex.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
warehouse_thing.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
wheel.rb Fix touch option to behave consistently with Persistence#touch method 2018-06-18 19:08:41 +09:00
without_table.rb Use frozen-string-literal in ActiveRecord 2017-07-19 22:27:07 +03:00
zine.rb Ignore strict loading violations on instances loaded through fixtures 2020-12-10 15:23:14 -06:00