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kamipo/respect_new_records_for_collection_proxy_distinct
Respect new records for `CollectionProxy#uniq`
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Currently if `CollectionProxy` has more than one new record,
`CollectionProxy#uniq` result is incorrect.
And `CollectionProxy#uniq` was aliased to `distinct` in a1bb6c8b06db.
But the `uniq` method and the `SELECT DISTINCT` method are different
methods. The doc in `CollectionProxy` is for the `SELECT DISTINCT`
method, not for the `uniq` method.
Therefore, reverting the alias in `CollectionProxy` to fix the
inconsistency and to have the both methods.
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The relation method `update_all` allows you to pass a SQL fragment. The
functionality is already mentioned in the prose but the examples section
does not cover it.
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As reported via #26904, there is a regression in how values for
Postgres' HStore column type are being processed, beginning in Rails 5.
Currently, the way that Active Record checks whether or not values need
to be serialized and put into the correct storage format is whether or
not it is a `Hash` object. Since `ActionController::Parameters` no
longer inherits from `Hash` in Rails 5, this conditional now returns
false. To remedy this, we are now checking to see whether the `value`
parameters being passed in responds to a certain method, and then
calling the `serialize` method, except this time with a real Hash
object. Keeping things DRY!
Fixes #26904.
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Before:
```ruby
def calculate(operation, _column_name)
if [:count, :sum].include? operation
group_values.any? ? Hash.new : 0
elsif [:average, :minimum, :maximum].include?(operation) && group_values.any?
Hash.new
else
nil
end
end
```
After:
```ruby
def calculate(operation, _column_name)
case operation
when :count, :sum
group_values.any? ? Hash.new : 0
when :average, :minimum, :maximum
group_values.any? ? Hash.new : nil
end
end
```
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Avoid `build_preloader` if preloading is not needed
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All query methods calls `spawn` and bang method, but only `none` is not.
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Caused by 007e50d8e5a900547471b6c4ec79d9d217682c5d.
https://github.com/rails/rails/pull/26925 was closed in favor of dcb364e.
But dcb364e is only fixed sqlite3 adapter and still broken mysql2
adapter with `prepared_statements: true` (`exec_stmt_and_free`).
```diff
diff --git a/activerecord/test/config.example.yml b/activerecord/test/config.example.yml
index 58e2d45..7b3c1a6 100644
--- a/activerecord/test/config.example.yml
+++ b/activerecord/test/config.example.yml
@@ -56,9 +56,11 @@ connections:
username: rails
encoding: utf8
collation: utf8_unicode_ci
+ prepared_statements: true
arunit2:
username: rails
encoding: utf8
+ prepared_statements: true
oracle:
arunit:
```
```
% be rake test_mysql2 --verbose
...
Using mysql2
/Users/kamipo/src/github.com/rails/rails/activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb:90: warning: assigned but unused variable - result
/Users/kamipo/src/github.com/rails/rails/activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb:101:in `block in exec_stmt_and_free': NameError: undefined local variable or method `result' for #<ActiveRecord::ConnectionAdapters::Mysql2Adapter:0x007fe2c50eb140>: SELECT `ar_internal_metadata`.* FROM `ar_internal_metadata` WHERE `ar_internal_metadata`.`key` = ? LIMIT ? (ActiveRecord::StatementInvalid)
from /Users/kamipo/src/github.com/rails/rails/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb:586:in `block in log'
...
```
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Changelog edits
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Add missing `+` around a some literals.
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Mainly around `nil`
[ci skip]
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Fix spelling in API documentation
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[ci skip]
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Follow up to #27008.
`table_structure` is an internal method so it is better to hide it in
the doc. And alias `table_structure` to `column_definitions` to remove
the duplicated `columns` method in the sqlite3 adapter.
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that accepts results of SHOW FIELDS
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Configure query caching (per thread) on the connection pool
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connected? doesn't mean what we need here.
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versions of mysql2
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Clear query cache during checkin, instead of an execution callback
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It doesn't make sense for the query cache to persist while a connection
moves through the pool and is assigned to a new thread.
[Samuel Cochran & Matthew Draper]
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kamipo/avoid_unscope_order_when_limit_value_present
Avoid `unscope(:order)` when `limit_value` is presented for `count`
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If `limit_value` is presented, records fetching order is very important
for performance. Should not unscope the order in the case.
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Under JRuby, the updates of the one shared variable interleaved,
causing threads to pick up each others' connections. I'm amazed
this worked on MRI.
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If the call to `.define_attribute_methods` actually ends up loading the
schema (*very* hard to do, as it requires the object being created
without `allocate` having been called, but it can be done by manually
calling `initialize` from inside `marshal_load` if you're crazy), the
value of `_default_attributes` will change from that call.
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Move `test_quoting_classes` into `test/cases/quoting_test.rb`
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fix datatime error
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* Fixes TypeError when cache counter value equals nil
* Test case for counter cache on unloaded has_many association
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Remove unnecessary `target.uniq.size` in `CollectionAssociation#size`
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If `association_scope` have `distinct_value`, same record cannot exist
in `target`.
https://github.com/rails/rails/blob/v5.0.0/activerecord/lib/active_record/associations/collection_association.rb#L419-L424
```ruby
def add_to_target(record, skip_callbacks = false, &block)
if association_scope.distinct_value
index = @target.index(record)
end
replace_on_target(record, index, skip_callbacks, &block)
end
```
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Remove unused internal `:dependent` option in `CollectionAssociation#delete`
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The internal `:dependent` option was introduced at #10604.
But currently unused.
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With the changes in #25337, double save bugs are pretty much impossible,
so we can just lift this restriction with pretty much no change. There
were a handful of cases where we were relying on specific quirks in
tests that had to be updated. The change to has_one associations was due
to a particularly interesting test where an autosaved has_one
association was replaced with a new child, where the child failed to
save but the test wanted to check that the parent id persisted to `nil`.
I think this is almost certainly the wrong behavior, and I may change
that behavior later. But ultimately the root cause was because we never
remove the parent in memory when nullifying the child. This makes #23197
no longer needed, but it is what we'll do to fix some issues on 5.0
Close #23197
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callbacks
We pretty frequently get bug reports that "dirty is broken inside of
after callbacks". Intuitively they are correct. You'd expect
`Model.after_save { puts changed? }; model.save` to do the same thing as
`model.save; puts model.changed?`, but it does not.
However, changing this goes much farther than just making the behavior
more intuitive. There are a _ton_ of places inside of AR that can be
drastically simplified with this change. Specifically, autosave
associations, timestamps, touch, counter cache, and just about anything
else in AR that works with callbacks have code to try to avoid "double
save" bugs which we will be able to flat out remove with this change.
We introduce two new sets of methods, both with names that are meant to
be more explicit than dirty. The first set maintains the old behavior,
and their names are meant to center that they are about changes that
occurred during the save that just happened. They are equivalent to
`previous_changes` when called outside of after callbacks, or once the
deprecation cycle moves.
The second set is the new behavior. Their names imply that they are
talking about changes from the database representation. The fact that
this is what we really care about became clear when looking at
`BelongsTo.touch_record` when tests were failing. I'm unsure that this
set of methods should be in the public API. Outside of after callbacks,
they are equivalent to the existing methods on dirty.
Dirty itself is not deprecated, nor are the methods inside of it. They
will only emit the warning when called inside of after callbacks. The
scope of this breakage is pretty large, but the migration path is
simple. Given how much this can improve our codebase, and considering
that it makes our API more intuitive, I think it's worth doing.
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These comment sometimes explain a face which does not match
the face.
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In ActiveRecord test :men, :faces, :interests and :zines tables are
used for `:inverse_of` test cases, not `:wheels`.
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007e50d8e5a900547471b6c4ec79d9d217682c5d
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Fix for has_and_belongs_to_many & has_many_through associations
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partial_writes is false
This will fix #19663
Also with this fix, active record does not fire unnecassary update queries while partial_writes is true
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