| Commit message (Collapse) | Author | Age | Files | Lines |
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The attribute methods for a model are currently defined lazily the first
time that model is instantiated, even when `config.eager_load` is true.
This means the first request to use each model incurs the cost, which
usually involves a database round trip to fetch the schema definition.
By defining the attribute methods for all models while the application
is booting, we move that work out of any individual request. When using
a forking web server, this also reduces the number of times the schema
definition is queried by doing it once in the parent process instead of
from each forked process during their first request.
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In Ruby 2.3 or later, `String#+@` is available and `+@` is faster than `dup`.
```ruby
# frozen_string_literal: true
require "bundler/inline"
gemfile(true) do
source "https://rubygems.org"
gem "benchmark-ips"
end
Benchmark.ips do |x|
x.report('+@') { +"" }
x.report('dup') { "".dup }
x.compare!
end
```
```
$ ruby -v benchmark.rb
ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-linux]
Warming up --------------------------------------
+@ 282.289k i/100ms
dup 187.638k i/100ms
Calculating -------------------------------------
+@ 6.775M (± 3.6%) i/s - 33.875M in 5.006253s
dup 3.320M (± 2.2%) i/s - 16.700M in 5.032125s
Comparison:
+@: 6775299.3 i/s
dup: 3320400.7 i/s - 2.04x slower
```
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[close #33907] Error when using "recyclable" cache keys with a store that does not support it
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- Moving the `supports_cache_versioning?` check to a class method.
- Shorten the method doc.
- Expand on the error message.
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does not support it
If you are using the "in cache versioning" also known as "recyclable cache keys" the cache store must be aware of this scheme, otherwise you will generate cache entries that never invalidate.
This PR adds a check to the initialization process to ensure that if recyclable cache keys are being used via
```
config.active_record.cache_versioning = true
```
Then the cache store needs to show that it supports this versioning scheme. Cache stores can let Rails know that they support this scheme by adding a method `supports_in_cache_versioning?` and returning true.
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This example was just missing a closing curly brace to complete the closure 😄
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Ignore psqlrc files when executing psql commands
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psqlrc files can affect the execution of commands in ways that can hold
up execution by blocking or otherwise cause unexpected side effects and
should best be ignored when using psql programmatically.
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Since #33875, Rails dropped supporting MySQL 5.1 which does not support
utf8mb4. We no longer need to use legacy utf8 (utf8mb3) conservatively.
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Make a deep copy of the _default_attributes in column_defaults
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When column_defaults is called it calls `value` on each instance of
Attribute inside the _default_attributes set. Since value is memoized in
the Attribute instance and that Attribute instance is shared across all
instances of a model the next call to the default value will be memozied
not running the proc defined by the user.
Fixes #33031.
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`ActiveRecord::Result#to_a` was introduced in #33912.
I would prefer to make `to_a` as alias to the `to_ary` because:
- It would be clear for users from https://edgeapi.rubyonrails.org/classes/ActiveRecord/Result.html
that `to_a` and `to_ary` are the same
- For us it would take less efforts in case if we needed to change the docs
or implementation, since the methods are the same
Follow up #33912
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Don't update counter cache unless the record is actually saved
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This is a 4th attempt to make counter cache transactional completely.
Past attempts: #9236, #14849, #23357.
All existing counter cache issues (increment/decrement twice, lost
increment) are caused due to updating counter cache on the outside of
the record saving transaction by assigning belongs_to record, even
though assigning that doesn't cause the record saving.
We have the `@_after_replace_counter_called` guard condition to mitigate
double increment/decrement issues, but we can't completely prevent that
inconsistency as long as updating counter cache on the outside of the
transaction, since saving the record is not always happened after that.
We already have handling counter cache after create/update/destroy,
https://github.com/rails/rails/blob/1b90f614b1b3d06b7f02a8b9ea6cd84f15d58643/activerecord/lib/active_record/counter_cache.rb#L162-L189
https://github.com/rails/rails/blob/1b90f614b1b3d06b7f02a8b9ea6cd84f15d58643/activerecord/lib/active_record/associations/builder/belongs_to.rb#L33-L59
so just removing assigning logic on the belongs_to association makes
counter cache transactional completely.
Closes #14849.
Closes #23357.
Closes #31493.
Closes #31494.
Closes #32372.
Closes #33113.
Closes #33117
Closes #33129.
Closes #33458.
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Deprecate ActiveRecord::Result#to_hash in favor of #to_a
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method returns an array of hashes, not a hash
e.g. Hash.try_convert(result) calls #to_hash and raises a TypeError
[Gannon McGibbon + Kevin Cheng]
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When you pass an empty array to find we know we shoudl return an empty
array but it is surprising that we are returning the original empty
array instead of a new one.
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`ActiveRecord::Migrator.migrations_path=` was deprecated in #31727.
This commit fixes:
- `ActiveRecord::Migrator.migrations_path=` is deprecated, but not
`ActiveRecord::Migrator.migrations_paths=`
- Adds missing space
The warning including this commit:
```
DEPRECATION WARNING: `ActiveRecord::Migrator.migrations_path=` is now
deprecated and will be removed in Rails 6.0. You can set the `migrations_paths`
on the `connection` instead through the `database.yml`.
```
Since it was deprecated in Rails 5.2 we should backport it to the `5-2-stable` branch.
Related to #31727
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PostgreSQL: prepare for pg-1.1
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Parsing of malformed array strings without raising an error is deprecated in
pg-1.1. It's therefore necessary to catch parser errors starting with pg-2.0.
See also pg commit:
https://bitbucket.org/ged/ruby-pg/commits/1b081326b346368e70c9c03ee7080e28d6b3a3dc
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Version 1.1.0 deprecates exec and async_exec with a params array due to
distinct semantics between calls with and without params array.
Instead exec_params or async_exec_params shall be used.
Moreover in pg-1.1.0 exec_* and prepare methods are aliases for async_exec_*
and async_prepare. async_* methods don't need to be called explicit -
they are the default now, when calling exec_* and prepare.
For pg versions before 1.1, keep using async_exec.
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faucct/bugfix/preload_multiple_instances_of_same_record
ActiveRecord::Associations::Preloader should preload all instances of the same record
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same record
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MySQL supports JOINs to UPDATE, so if column name isn't qualified by
table name, it would cause an ambiguous error:
```
Mysql2::Error: Column 'integer' in field list is ambiguous: UPDATE `pets` INNER JOIN `toys` ON `toys`.`pet_id` = `pets`.`pet_id` SET `integer` = COALESCE(`integer`, 0) + 1 WHERE `toys`.`name` = ?
```
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Fallback to unprepared statement only when bind params limit is exceeded
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This is a follow up and/or an alternative of #33844.
Unlike #33844, this would attempt to construct unprepared statement only
when bind params limit (mysql2 65535, pg 65535, sqlite3 249999) is
exceeded.
I only defined 65535 as the limit, not defined 249999 for sqlite3, since
it is an edge case, I'm not excited to add less worth extra code.
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* Update association_basics.md [ci skip]
Addresses issue #33599
* Update associations.rb API documentation [ci skip]
Additional detail for documentation of `belongs_to` `association=(associate)`
* Update association_basics.md [ci skip]
Reverts misplaced documentation comment
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Remove mysql2 gem version requirement "< 0.6.0"
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Suggested at https://github.com/rails/rails/pull/33876#issuecomment-421176221
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Follow up #33874.
Related #23393.
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add `any?` to DatabaseConfigurations
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Allow subclasses to redefine autosave callbacks for associated records
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Validate if `utf8mb4` character set and longer index key prefix is supported
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* MySQL 5.1 does not support `utf8mb4` character set
* MySQL 5.1 had been already EOLed on Dec 2013
https://www.mysql.com/support/eol-notice.html
> Per Oracle's Lifetime Support policy, as of December 31, 2013, MySQL 5.1
> is covered under Oracle Sustaining Support.
* MySQL 5.5.8 is the first General Availability of MySQL 5.5
https://dev.mysql.com/doc/relnotes/mysql/5.5/en/news-5-5-8.html
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are not supported
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Once #33608 merged If users create a new database using MySQL 5.1.x, it will fail to create databases
since MySQL 5.1 does not know `utf8mb4` character set.
This pull request removes `encoding: utf8mb4` from `mysql.yml.tt`
to let create_database method handles default character set by MySQL server version.
`supports_longer_index_key_prefix?` method will need to validate if MySQL 5.5 and 5.6 server configured
correctly to support longer index key prefix, but not yet.
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Eager loading/preloading should be worked regardless of large number of records
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Since 213796f, bind params are used for IN clause if enabled prepared
statements.
Unfortunately, most adapter modules have a limitation for # of bind
params (mysql2 65535, pg 65535, sqlite3 250000). So if eager loading
large number of records at once, that query couldn't be sent to the
database.
Since eager loading/preloading queries are auto-generated by Active
Record itself, so it should be worked regardless of large number of
records like as before.
Fixes #33702.
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Also remove `# :nodoc:` for `ActiveRecord::Core::ClassMethods` in order
to show non-nodoc methods in that module on the api docs http://edgeapi.rubyonrails.org
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It would allow `filter_attributes` to be reused across multiple
calls to `#inspect` or `#pretty_print`.
- Add `require "set"`
- Remove `filter_attributes` instance reader. I think there is no need
to keep it.
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- Move
```
filter_attributes = self.filter_attributes.map(&:to_s).to_set
filter_attributes.include?(attribute_name) && !read_attribute(attribute_name).nil?
```
to private method.
- Fix tests in `activerecord/test/cases/filter_attributes_test.rb`
- Ensure that `teardown` sets `ActiveRecord::Base.filter_attributes` to
previous state.
- Ensure that `Admin::Account.filter_attributes` is set to previous
state in the "filter_attributes could be overwritten by models" test.
Follow up #33756
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Add mention that `config.filter_parameters` also filters out sensitive
values of database columns when call `#inspect` since #33756.
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In a test app we observed that the query cache was not enabled on the
first request. This was because the query cache hooks are installed on
load and active record is loaded in the middle of the first request.
If we remove the `on_load` from the railtie the query cache hooks will
be installed before the first request, allowing the cache to be enabled
on that first request.
This is ok because query cache doesn't load anything else, only itself
so we're not eager loading all of active record before the first
request, just the query cache hooks.
[Eileen M. Uchitelle & Matthew Draper]
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* Use utf8mb4 character set by default
`utf8mb4` character set supports supplementary characters including emoji.
`utf8` character set with 3-Byte encoding is not enough to support them.
There was a downside of 4-Byte length character set with MySQL 5.5 and 5.6:
"ERROR 1071 (42000): Specified key was too long; max key length is 767 bytes"
for Rails string data type which is mapped to varchar(255) type.
MySQL 5.7 supports 3072 byte key prefix length by default.
* Remove `DEFAULT COLLATE` from Active Record unit test databases
There should be no "one size fits all" collation in MySQL 5.7.
Let MySQL server choose the default collation for Active Record
unit test databases.
Users can choose their best collation for their databases
by setting `options[:collation]` based on their requirements.
* InnoDB FULLTEXT indexes support since MySQL 5.6
it does not have to use MyISAM storage engine whose maximum key length is 1000 bytes.
Using MyISAM storag engine with utf8mb4 character set would cause
"Specified key was too long; max key length is 1000 bytes"
https://dev.mysql.com/doc/refman/5.6/en/innodb-fulltext-index.html
* References
"10.9.1 The utf8mb4 Character Set (4-Byte UTF-8 Unicode Encoding)"
https://dev.mysql.com/doc/refman/5.7/en/charset-unicode-utf8mb4.html
"10.9.2 The utf8mb3 Character Set (3-Byte UTF-8 Unicode Encoding)"
https://dev.mysql.com/doc/refman/5.7/en/charset-unicode-utf8.html
"14.8.1.7 Limits on InnoDB Tables"
https://dev.mysql.com/doc/refman/5.7/en/innodb-restrictions.html
> If innodb_large_prefix is enabled (the default), the index key prefix limit is 3072 bytes
> for InnoDB tables that use DYNAMIC or COMPRESSED row format.
* CI against MySQL 5.7
Followed this instruction and changed root password to empty string.
https://docs.travis-ci.com/user/database-setup/#MySQL-57
* The recommended minimum version of MySQL is 5.7.9
to support utf8mb4 character set and `innodb_default_row_format`
MySQL 5.7.9 introduces `innodb_default_row_format` to support 3072 byte length index by default.
Users do not have to change MySQL database configuration to support Rails string type.
https://dev.mysql.com/doc/refman/5.7/en/innodb-parameters.html#sysvar_innodb_default_row_format
https://dev.mysql.com/doc/refman/5.7/en/innodb-restrictions.html
> If innodb_large_prefix is enabled (the default),
> the index key prefix limit is 3072 bytes for InnoDB tables that use DYNAMIC or COMPRESSED row format.
* The recommended minimum version of MariaDB is 10.2.2
MariaDB 10.2.2 is the first version of MariaDB supporting `innodb_default_row_format`
Also MariaDB says "MySQL 5.7 is compatible with MariaDB 10.2".
- innodb_default_row_format
https://mariadb.com/kb/en/library/xtradbinnodb-server-system-variables/#innodb_default_row_format
- "MariaDB versus MySQL - Compatibility"
https://mariadb.com/kb/en/library/mariadb-vs-mysql-compatibility/
> MySQL 5.7 is compatible with MariaDB 10.2
- "Supported Character Sets and Collations"
https://mariadb.com/kb/en/library/supported-character-sets-and-collations/
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