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For reads, we never need to construct this object. The double `defined?`
check is to avoid errors in tests
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Fix AC::Parameters not being sanitized for query methods.
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I misread this test in
https://github.com/rails/rails/commit/1a693c79c32cba070256fdb7bd1990c3d07d554f
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There were a few places where I missed a `create` vs `new`
before_type_cast check, and the semantics of `reload` became wrong.
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We can skip the allocation of a full `AttributeSet` by changing the
semantics of how we structure things. Instead of comparing two separate
`AttributeSet` objects, and `Attribute` is now a singly linked list of
every change that has happened to it. Since the attribute objects are
immutable, to apply the changes we simply need to copy the head of the
list.
It's worth noting that this causes one subtle change in the behavior of
AR. When a record is saved successfully, the `before_type_cast` version
of everything will be what was sent to the database. I honestly think
these semantics make more sense, as we could have just as easily had the
DB do `RETURNING *` and updated the record with those if we had things
like timestamps implemented at the DB layer.
This brings our performance closer to 4.2, but we're still not quite
there.
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Move from `AS::Callbacks::CallbackChain.halt_and_display_warning_on_return_false`
to `AS::Callbacks.halt_and_display_warning_on_return_false` base on
[this
discussion](https://github.com/rails/rails/pull/21218#discussion_r39354580)
Fix the documentation broken by 0a120a818d413c64ff9867125f0b03788fc306f8
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Allow fixtures YAML files to set the model class in the file itself
Conflicts:
activerecord/CHANGELOG.md
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Currently, `set_fixture_class` is only available using the
`TestFixtures` concern and it is ignored for `rake db:fixtures:load`.
Using the correct model class, it is possible for the fixture load
to also load the associations from the YAML files (e.g., `:belongs_to`
and `:has_many`).
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I'm looking to move towards a tree-like structure for dirty checking
that involves an attribute holding onto the attribute that it was
created from. This means that `changed?` can be fully encapsulated on
that object. Since the objects are immutable, in `changes_applied`, we
can simply perform a shallow dup, instead of a deep one.
I'm not sure if that will actually end up in a performance boost, but
I'd like to semantically separate these concepts regardless
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The external uses of this method have been removed, and I'd like to
internally re-use that name, as I'm planning to encapsulate `changed?`
into the attribute object itself.
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`ActiveRecord::Associations::JoinDependency` now it’s own class` and `ActiveRecord::Associations::ThroughAssociationScope` doesn’t exists
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Fix minor docs [ci skip]
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Fix `ActiveRecord::RecordNotFound` error message with custom primary …
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skip]
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[ci skip] Update docs of `AR::Sanitization`
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* add % style prepared statement and string examples for
`sanitize_sql_for_conditions`
* add array and string examples for `sanitize_sql_for_assignment`
* add examples for `sanitize_sql_like`
* add % style prepared statement example for `sanitize_sql_array`
* align spaces of exampl code
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`inverse_of` on through associations was accidently removed/caused to
stop working in commit f8d2899 which was part of a refactoring on
`ThroughReflection`.
To fix we moved `inverse_of` and `check_validity_of_inverse!` to the
`AbstractReflection` so it's available to the `ThroughReflection`
without having to dup any methods. We then need to delegate `inverse_name`
method in `ThroughReflection`. `inverse_name` can't be moved to
`AbstractReflection` without moving methods that set the instance
variable `@automatic_inverse_of`.
This adds a test that ensures that `inverse_of` on a `ThroughReflection`
returns the correct class name, and the correct record for the inverse
relationship.
Fixes #21692
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`column_alias_for` method is no more supporting *keys [ci skip]
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ClassMethod, Since commit https://github.com/rails/rails/commit/a3936bbe21f4bff8247f890cacfd0fc882921003 [ci skip]
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Correcting `ActiveRecord::ReadOnlyRecord` Error Message [ci skip]
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The implementation of `attribute_method?` on Active Record requires
establishing a database connection and querying the schema. As a general
rule, we don't want to require database connections for any class macro,
as the class should be able to be loaded without a database (e.g. for
things like compiling assets).
Instead of eagerly defining these methods, we do it lazily the first
time they are accessed via `method_missing`. This should not cause any
performance hits, as it will only hit `method_missing` once for the
entire class.
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Quote prepared statements of `sanitize_sql_array`
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Sure unquoted SQL code pass test, but this % style prepared statements
are dangerous. Test codes and code examples are also "Rails" codes,
so quote placeholder of prepared statements.
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This was passing prior to 20b177b78ef5d21c8cc255f0376f6b2e948de234,
because we were not properly applying our contract that
`model.attr == model.tap(&:save).reload.attr` for this case. Now that
that has been resolved, this test is invalid on some adapters
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When a time object was assigned to a datetime column, the decorator for
TZ aware attributes wouldn't call super, so when using a database
without support for subsecond precision, the nanosecond would not be
truncated, leading to the value being marked as changed.
Interestingly, this also shows our new implementation of dirty checking
to be more robust than the old one (with less code and better
performance! :tada:!!!)
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They didn't help.
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Nobody can replicate locally and the failure makes no sense
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When I removed the call to `super` to avoid the setting of
`@previous_changes`, I forgot to duplicate the other part of that
behavior, which led to failing tests
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The biggest source of the performance regression in these methods
occurred because dirty tracking required eagerly materializing and type
casting the assigned values. In the previous commits, I've changed dirty
tracking to perform the comparisons lazily. However, all of this is moot
when calling `save`, since `changes_applied` will be called, which just
ends up eagerly materializing everything, anyway. With the new mutation
tracker, it's easy to just compare the previous two hashes in the same
lazy fashion.
We will not have aliasing issues with this setup, which is proven by the
fact that we're able to detect nested mutation.
Before:
User.create! 2.007k (± 7.1%) i/s - 10.098k
After:
User.create! 2.557k (± 3.5%) i/s - 12.789k
Fixes #19859
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In order to improve the performance of dirty checking, we're going to
need to duplicate all of the `previous_` methods in Active Model.
However, these methods are basically the same as their non-previous
counterparts, but comparing `@original_attributes` to
`@previous_original_attributes` instead of `@attributes` and
`@original_attributes`. This will help reduce that duplication.
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This moves a bit more of the logic required for dirty checking into the
attribute objects. I had hoped to remove the `with_value_from_database`
stuff, but unfortunately just calling `dup` on the attribute objects
isn't enough, since the values might contain deeply nested data
structures. I think this can be cleaned up further.
This makes most dirty checking become lazy, and reduces the number of
object allocations and amount of CPU time when assigning a value. This
opens the door (but doesn't quite finish) to improving the performance
of writes to a place comparable to 4.1
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Follow-up to #21720.
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ActiveRecord: use association's `unscope` when preloading
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Fix a bug with returning_disabled when using the postgresql adapter
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The returning_disabled configuration option is required to make postgresql partitioning triggers work. This commit fixes a bug where an invalid query would be made in cases where returning_disabled was true and objects were created with no attributes defined.
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Fix ActiveRecord `instance_method_already_implemented` docs [ci skip]
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It appears that as of version 4 the `db:test:prepare` task no longer depends on the `abort_if_pending_migrations` task, which leaves this comment out of sync.
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