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MySQL: `ROW_FORMAT=DYNAMIC` create table option by default
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Since MySQL 5.7.9, the `innodb_default_row_format` option defines the
default row format for InnoDB tables. The default setting is `DYNAMIC`.
The row format is required for indexing on `varchar(255)` with `utf8mb4`
columns.
As long as using MySQL 5.6, CI won't be passed even if MySQL server
setting is properly configured the same as MySQL 5.7
(`innodb_file_per_table = 1`, `innodb_file_format = 'Barracuda'`, and
`innodb_large_prefix = 1`) since InnoDB table is created as the row
format `COMPACT` by default on MySQL 5.6, therefore indexing on string
with `utf8mb4` columns aren't succeeded.
Making `ROW_FORMAT=DYNAMIC` create table option by default for legacy
MySQL version would mitigate the indexing issue on the user side, and it
makes CI would be passed on MySQL 5.6 which is configured properly.
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Currently we sometimes find a redundant begin block in code review
(e.g. https://github.com/rails/rails/pull/33604#discussion_r209784205).
I'd like to enable `Style/RedundantBegin` cop to avoid that, since
rescue/else/ensure are allowed inside do/end blocks in Ruby 2.5
(https://bugs.ruby-lang.org/issues/12906), so we'd probably meets with
that situation than before.
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https://bugs.ruby-lang.org/issues/14132
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since Ruby 2.5
https://bugs.ruby-lang.org/issues/14133
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Unify _read_attribute definition to use &block
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Thanks to ko1, passing block parameter to another method is
significantly optimized in Ruby 2.5.
https://bugs.ruby-lang.org/issues/14045
Thus we no longer need to keep this ugly hack.
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Generally followed the pattern for https://github.com/rails/rails/pull/32034
* Removes needless CI configs for 2.4
* Targets 2.5 in rubocop
* Updates existing CHANGELOG entries for fewer merge conflicts
* Removes Hash#slice extension as that's inlined on Ruby 2.5.
* Removes the need for send on define_method in MethodCallAssertions.
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The indexing issue on `utf8mb4` columns is resolved since MySQL 5.7.9.
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Ref https://github.com/rails/rails/commit/59ff1ba30d9f4d34b4d478104cc3f453e553c67a#diff-38fb97fba84b1ef0f311c4110a597c44R35
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consistently
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This can be used to check the currently connected role. It's meant to
mirror AR::Base.connected_to
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BEGIN transaction would cause COMMIT or ROLLBACK, so unless COMMIT and
ROLLBACK aren't treated as write queries as well as BEGIN, the
`ReadOnlyError` would be raised.
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Upgrade Rubocop to 0.61.1 and fix offenses
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Otherwise `save` method would raise the `ReadOnlyError` against `BEGIN`
and `ROLLBACK` queries.
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Without this change, mysql2 adapter with prepared statements won't pass
`base_test.rb`.
```
% ARCONN=mysql2 be ruby -w -Itest test/cases/base_test.rb
Using mysql2
Run options: --seed 27614
# Running:
....S..............................F
Failure:
BasicsTest#test_creating_a_record_raises_if_preventing_writes [test/cases/base_test.rb:1493]:
ActiveRecord::ReadOnlyError expected but nothing was raised.
rails test test/cases/base_test.rb:1492
...F
Failure:
BasicsTest#test_deleting_a_record_raises_if_preventing_writes [test/cases/base_test.rb:1513]:
ActiveRecord::ReadOnlyError expected but nothing was raised.
rails test test/cases/base_test.rb:1510
............................................................................................................F
Failure:
BasicsTest#test_updating_a_record_raises_if_preventing_writes [test/cases/base_test.rb:1503]:
ActiveRecord::ReadOnlyError expected but nothing was raised.
rails test test/cases/base_test.rb:1500
..........
Finished in 2.534490s, 62.7345 runs/s, 149.5370 assertions/s.
159 runs, 379 assertions, 3 failures, 0 errors, 1 skips
```
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Follow up #34505.
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Rename error that occurs when writing on a read
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I originally named this `StatementInvalid` because that's what we do in
GitHub, but `@tenderlove` pointed out that this means apps can't test
for or explitly rescue this error. `StatementInvalid` is pretty broad so
I've renamed this to `ReadOnlyError`.
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* `#create_or_find_by/!`: add more tests
* Fix docs of `create_or_find_by`
This method uses `find_by!` internally.
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`test_serialized_attribute_works_under_concurrent_initial_access` test
Since bd62389307e138ee0f274a9d62697567a3334ea0, isolate test of `test_serialized_attribute_works_under_concurrent_initial_access` fails.
```
$ ./bin/test -w test/cases/serialized_attribute_test.rb -n test_serialized_attribute_works_under_concurrent_initial_access
Using sqlite3
Run options: -n test_serialized_attribute_works_under_concurrent_initial_access --seed 32129
# Running:
E
Error:
SerializedAttributeTest#test_serialized_attribute_works_under_concurrent_initial_access:
ActiveRecord::StatementInvalid: SQLite3::SQLException: no such table:
```
If duplicate an unloaded model, it seems that method invocation for that class
is not guaranteed. Use the original class to avoid it.
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Fix attribute decoration leak on serialized attribute test
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Ensure that `delete_all` on collection proxy returns affected count
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Unlike the `Relation#delete_all`, `delete_all` on collection proxy
doesn't return affected count. Since the `CollectionProxy` is a subclass
of the `Relation`, this inconsistency is probably not intended, so it
should return the count consistently.
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Reset scope after delete on collection association to clear stale
offsets of removed records.
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Pass the `connection` to the `@instrumenter.instrument` method call
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Fix NumericData.average test on 2.6.0-dev
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And hide the `READ_QUERY` internal constant.
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See: https://travis-ci.org/rails/rails/jobs/462233144#L1384
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[ci skip]
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This PR adds the ability to prevent writes to a database even if the
database user is able to write (ie the database is a primary and not a
replica).
This is useful for a few reasons: 1) when converting your database from
a single db to a primary/replica setup - you can fix all the writes on
reads early on, 2) when we implement automatic database switching or
when an app is manually switching connections this feature can be used
to ensure reads are reading and writes are writing. We want to make sure
we raise if we ever try to write in read mode, regardless of database
type and 3) for local development if you don't want to set up multiple
databases but do want to support rw/ro queries.
This should be used in conjunction with `connected_to` in write mode.
For example:
```
ActiveRecord::Base.connected_to(role: :writing) do
Dog.connection.while_preventing_writes do
Dog.create! # will raise because we're preventing writes
end
end
ActiveRecord::Base.connected_to(role: :reading) do
Dog.connection.while_preventing_writes do
Dog.first # will not raise because we're not writing
end
end
```
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Fix the scoping with query methods in the scope block
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Follow up #33394.
#33394 only fixes the case of scoping with klass methods in the scope
block which invokes `klass.all`.
Query methods in the scope block also need to invoke `klass.all` to be
affected by the scoping.
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Allow aliased attributes to be used in `#update_columns` and `#update`.
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Improve ActiveRecord::Querying documentation [ci skip]
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* Break up long sentences
* Reword some sentences to clarify subject, predicate, and object
* Explain drawbacks of using count_by_sql
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Fixes issue where "user post" is misinterpreted as "\"user\".\"post\""
when quoting table names with the postgres adapter.
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Patch load error in case GemSpecError
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Use raw time string from DB to generate ActiveRecord#cache_version
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