| Commit message (Collapse) | Author | Age | Files | Lines |
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This reverts commit eec3e28a1abf75676dcee58308ee5721bb53c325, reversing
changes made to 5588fb4802328a2183f4a55c36d6703ee435f85c.
Reason: Marking as loaded without actual loading is too greedy optimization.
See more context #35239.
Closes #35239.
[Edouard CHIN & Ryuta Kamizono]
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Bugfix has_many association #size when ids reader is cached and assoc…
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is changed
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Formerly it was returning arguments (`records` array).
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Reuse AR::Association#find_target method
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This reverts commit f2ab8b64d4d46d7199f94c3e21021f414a4d259a, reversing
changes made to b9c7305dbe57931a153a540d49ae5d469af61a14.
Reason: `scope.take` is not the same with `scope.to_a.first`.
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Before this patch, singular and collection associations
had different implementations of the #find_target method.
This patch reuses the code properly through extending the low level
methods.
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There was a bug in the handling of duplicates when
assigning (replacing) associated records, which made the result
dependent on whether a given record was associated already before
being assigned anew. E.g.
post.people = [person, person]
post.people.count
# => 2
while
post.people = [person]
post.people = [person, person]
post.people.count
# => 1
This change adds a test to provoke the former incorrect behavior, and
fixes it.
Cause of the bug was the handling of record collections as sets, and
using `-` (difference) and `&` (union) operations on them
indiscriminately. This temporary conversion to sets would eliminate
duplicates.
The fix is to decorate record collections for these operations, and
only for the `has_many :through` case. It is done by counting
occurrences, and use the record together with the occurrence number as
element, in order to make them work well in sets. Given
a, b = *Person.all
then the collection used for finding the difference or union of
records would be internally changed from
[a, b, a]
to
[[a, 1], [b, 1], [a, 2]]
for these operations. So a first occurrence and a second occurrence
would be distinguishable, which is all that is necessary for this
task.
Fixes #33942.
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It mark the association as loaded and this can cause the object to be in
an stale state.
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This also mark the association as loaded given we changed it in memory
and avoid the next access to the reader to make a query to the databse.
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Use hash lookup for deleting existing associations from `target`
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`Array#delete` searches for all occurrences in the `target` array. When performing `dependent: :destroy` in active_record/associations/collection_association, the loop becomes O(N^2). It is particularly slow when destroying large amount of associations (e.g. 10K records).
Either `Hash` or `Set` can optimize the loop to O(N). `Hash` is slightly faster in this simple usage.
```ruby
class Dummy; end
num = 10_000
test1a = num.times.map { Dummy.new }; nil
test1b = test1a.dup
test2a = num.times.map { Dummy.new }; nil
test2b = test2a.dup
Benchmark.ips do |x|
x.config(stats: :bootstrap, confidence: 95)
x.report("hash") do
hash = test1a.group_by { |r| r }
test1b.select! { |r| !hash[r] }
end
x.report("array") do
test2a.each { |r| test2b.delete(r) }
end
x.compare!
end
```
```
Calculating -------------------------------------
hash 11.000 i/100ms
array 1.000 i/100ms
-------------------------------------------------
hash 114.586 (±16.6%) i/s - 561.000
array 1.710k (±10.3%) i/s - 8.377k
Comparison:
array: 1710.4 i/s
hash: 114.6 i/s - 14.93x slower
```
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In `_create_record`, explicit `transaction` block requires rollback
handling manually when `insert_record` is failed.
We need to handle it in `_create_record`, not in `insert_record`, since
our test cases expect a record added to target and returned even if
`insert_record` is failed,
Closes #31488.
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Should be done before `before_add` callbacks.
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Currently `ids_reader` doesn't respect dirty target when the target is
not loaded yet unlike `collection.size`. I believe the inconsistency is
a bug, fixes the `ids_reader` to behave consistently regardless of
whether target is loaded or not.
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Already loaded associations were running an extra query when `size` was called on the association.
This fix ensures that an extra query is no longer run.
Update tests to use proper methods
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So `target.is_a?(Array)` is meaningless, and just use `target.empty?`
instead of `target.blank?`.
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With #31615 `type_for_attribute` accepts either
a symbol as well as a string. `has_attribute?` and `attribute_alias`
also accept either. Since these methods call `to_s` on the argument,
we no longer need to do that at the call site.
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`ThroughReflection`
This method was introduced in #26718, which is internally used only in
`CollectionAssociation`. There is no need to be in the reflection
classes.
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Fix `reflection.association_primary_key` for `has_many` association
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It is incorrect to treat `options[:primary_key]` as
`association_primary_key` if `has_many` associations because the
`:primary_key` means the column on the owner record, not on the
association record. It will break `ids_reader` and `ids_writer`.
```ruby
people(:david).essay_ids
# => ActiveRecord::StatementInvalid: Mysql2::Error: Unknown column 'essays.first_name' in 'field list': SELECT `essays`.first_name FROM `essays` WHERE `essays`.`writer_id` = 'David'
```
Fixes #14439.
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Since `Relation` includes `Enumerable`, it is enough to use `super`
simply.
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Return Not found Ids in ActiveRecord::NotFound
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This builds on top of 15e2da656f41af0124f7577858536f3b65462ad5.
now it also returns exact Ids which were not found which will be debugging simple.
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Actually `StatementCache#execute` is always passed the same klass that
the owner klass of the connection when the statement cache is created.
So passing `klass` to `StatementCache.new` will make more DRY.
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This is related with #27680.
Since `where_values_hash` keys constructed by `where` are string, so we
need `stringify_keys` to `create_with_value` before merging it.
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This reverts commit 3420a14590c0e6915d8b6c242887f74adb4120f9, reversing
changes made to afb66a5a598ce4ac74ad84b125a5abf046dcf5aa.
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Enforce frozen string in Rubocop
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Fixes #29627.
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kamipo/dont_passing_klass_connection_to_association_scope
Don't passing `klass.connection` to `AssociationScope`
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Passing `klass.connection` is redundant because `AssociationScope` is
passed an association itself and an association has `klass`.
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```ruby
car = Car.create!(name: "Tofaş")
# Before
car.bulb_ids # => SELECT "bulbs".ID FROM "bulbs" WHERE "bulbs"."name" = $1 AND "bulbs"."car_id" = $2 [["name", "defaulty"], ["car_id", 3]]
# After
car.bulb_ids # => SELECT "bulbs"."ID" FROM "bulbs" WHERE "bulbs"."name" = $1 AND "bulbs"."car_id" = $2 [["name", "defaulty"], ["car_id", 3]]
```
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Because constructing `scope` is a little expensive.
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Some third party modules expects that association returns same proxy
object each time (e.g. for stubbing collection methods:
https://github.com/rspec/rspec-rails/issues/1817).
So I decided that cache the proxy object and reset scope in the proxy
object each time.
Related context: https://github.com/rails/rails/commit/c86a32d7451c5d901620ac58630460915292f88b#commitcomment-2784312
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association saved in the callback
Related #18155, #26661, 268a5bb, #27434, #27442, and #28599.
Originally #18155 was introduced for preventing double insertion caused
by the after save callback. But it was caused the before save issue
(#26661). 268a5bb fixed #26661, but it was caused the performance
regression (#27434). #27442 added new record to `target` before calling
callbacks for fixing #27434. But it was caused double firing before save
callback (#28599). We cannot add new object to `target` before saving
the object.
This is improving #18155 to only track callbacks after `save`.
Fixes #28599.
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Delegate to `scope` rather than `merge!` for collection proxy
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Because merging the association scope was removed.
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`merge! association.scope(nullify: false)` is expensive but most methods
do not need the merge.
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Avoid to call `set_inverse_instance` twice for `has_many` association
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`create`, `create!`, and `concat` in `has_many` association hits
`set_inverse_instance` twice. It is enough to hit only once.
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Simply we can do `target.pluck(reflection.association_primary_key)` if
`target` is loaded.
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`append_record` was added at 15ddd51 for not double adding the record.
But adding `append_record` (checking `@target.include?(record)`) caused
performance regression #27434. Instead of checking not double adding the
record, add a record to target before any callbacks loads the record.
Fixes #27434.
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