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We sometimes ask "✂️ extra blank lines" to a contributor in reviews like
https://github.com/rails/rails/pull/33337#discussion_r201509738.
It is preferable to deal automatically without depending on manpower.
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After a real (non-savepoint) transaction has committed or rolled back,
the original persistence-related state for all records modified in that
transaction is discarded or restored, respectively.
When the model has transactional callbacks, this happens synchronously
in the `committed!` or `rolled_back!` methods; otherwise, it happens
lazily the next time the record's persistence-related state is accessed.
The synchronous code path always finalizes the state of the record, but
the lazy code path only pops one "level" from the transaction counter,
assuming it will always reach zero immediately after a real transaction.
As the test cases included here demonstrate, that isn't always the case.
By using the same logic as the synchronous code path, we ensure that the
record's state is always updated after a real transaction has finished.
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Follow up of #32605.
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If an `ActiveRecord::Rollback` error was raised by a persistence method
(e.g. in an `after_save` callback), this logic would potentially discard
the original state of the record from before the transaction, preventing
it from being restored later when the transaction was rolled back.
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This autocorrects the violations after adding a custom cop in
3305c78dcd.
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73e7aab behaved as expected on codeship, failing the build with
exactly these RuboCop violations. Hopefully `rubocop -a` will
have been enough to get a passing build!
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This pull request handles `FrozenError` introduced by Ruby 2.5.
Refer https://bugs.ruby-lang.org/projects/ruby-trunk/repository/revisions/61131
Since `FrozenError` is a subclass of `RuntimeError` minitest used by master
branch can handle it, though it would be better to handle `FrozenError`
explicitly if possible.
`FrozenError` does not exist in Ruby 2.4 or lower, `frozen_error_class`
handles which exception is expected to be raised.
This pull request is intended to be merged to master,
then backported to `5-1-stable` to address #31508
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returns true
Not only postgresql or mysql2 adapter, Oracle enhanced adapter
whose default isolation level is read commited, passes these two test cases.
`ConcurrentTransactionTest#test_transaction_per_thread`
`ConcurrentTransactionTest#test_transaction_isolation__read_committed`
```ruby
$ ARCONN=oracle bin/test test/cases/transactions_test.rb:961 -v
Using oracle
Run options: -v --seed 18865
ConcurrentTransactionTest#test_transaction_per_thread = 0.98 s = .
Finished in 1.061036s, 0.9425 runs/s, 5.6549 assertions/s.
1 runs, 6 assertions, 0 failures, 0 errors, 0 skips
```
```ruby
$ ARCONN=oracle bin/test test/cases/transactions_test.rb:979 -v
Using oracle
Run options: -v --seed 13341
ConcurrentTransactionTest#test_transaction_isolation__read_committed = 1.85 s = .
Finished in 1.928637s, 0.5185 runs/s, 10.3700 assertions/s.
1 runs, 20 assertions, 0 failures, 0 errors, 0 skips
$
```
Also, regardless it is a file based or memory based these tests could fail with SQLite3Adapter.
(Extra CR added to make lines shorter)
```ruby
$ ARCONN=sqlite3 bin/test test/cases/transactions_test.rb:961 -v
Using sqlite3
Run options: -v --seed 18815
ConcurrentTransactionTest#test_transaction_per_thread = /home/yahonda/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:108:in `step':
SQLite3::BusyException: database is locked: UPDATE "topics" SET "approved" = ?, "updated_at" = ? WHERE "topics"."id" = ? (ActiveRecord::StatementInvalid)
```
```ruby
$ ARCONN=sqlite3 bin/test test/cases/transactions_test.rb:979 -v
Using sqlite3
Run options: -v --seed 25520
ConcurrentTransactionTest#test_transaction_isolation__read_committed = 0.12 s = E
/home/yahonda/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:108:in `step':
SQLite3::BusyException: database is locked: UPDATE "developers" SET "salary" = ?, "updated_at" = ?, "updated_on" = ? WHERE "developers"."id" = ? (ActiveRecord::StatementInvalid)
```
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Sync transaction state when accessing primary key
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If a record is modified inside a transaction, it must check the outcome
of that transaction before accessing any state which would no longer be
valid if it was rolled back.
For example, consider a new record that was saved inside a transaction
which was later rolled back: it should be restored to its previous state
so that saving it again inserts a new row into the database instead of
trying to update a row that no longer exists.
The `id` and `id=` methods defined on the PrimaryKey module implement
this correctly, but when a model uses a custom primary key, the reader
and writer methods for that attribute must check the transaction state
too. The `read_attribute` and `write_attribute` methods also need to
check the transaction state when accessing the primary key.
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Let's say you have a nested transaction and both records are saved.
Before the outer transaction closes, a rollback is performed. Previously
the record in the outer transaction would get marked as not persisted
but the inner transaction would get persisted.
```ruby
Post.transaction do
post_one.save # will get rolled back
Post.transaction(requires_new: true) do
post_two.save # incorrectly remains marked as persisted
end
raise ActiveRecord::Rollback
end
```
To fix this the PR changes transaction handling to have the child
transaction ask the parent how the records should be marked. When
there are child transactions, it will always be a SavpointTransaction
because the stack isn't empty. From there we pass the parent_transaction
to the child SavepointTransaction where we add the children to the parent
so the parent can mark the inner transaction as rolledback and thus mark
the record as not persisted.
`update_attributes_from_transaction_state` uses the `completed?` check to
correctly mark all the transactions as rolledback and the inner record as
not persisted.
```ruby
Post.transaction do
post_one.save # will get rolled back
Post.transaction(requires_new: true) do
post_two.save # with new behavior, correctly marked as not persisted
on rollback
end
raise ActiveRecord::Rollback
end
```
Fixes #29320
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`set_state` was directly setting the transaction state instance
variable. It's better to set the state via specific methods (`rollback!`
and `commit!` respectively.
While undocumented and untested, it's possible someone is using
`set_state` in their app or gem so I've added a deprecation notice to
it.
No where in the app do we use `nullify!` but I wanted to keep existing
behavior while replacing the method with a better pattern.
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This reverts commit 3420a14590c0e6915d8b6c242887f74adb4120f9, reversing
changes made to afb66a5a598ce4ac74ad84b125a5abf046dcf5aa.
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`object.id` is correctly restored since #29378 has merged.
Closes #28274, Closes #28395.
[Ryuta Kamizono & Eugene Kenny]
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This change reverted in eac6f369 but it is needed for data integrity.
See #25328.
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mtsmfm/disable-referential-integrity-without-superuser-privilege-take-2"
This reverts commit c1faca6333abe4b938b98fedc8d1f47b88209ecf, reversing
changes made to 8c658a0ecc7f2b5fc015d424baf9edf6f3eb2b0b.
See https://github.com/rails/rails/pull/27636#issuecomment-297534129
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privileges (take 2)
Re-create https://github.com/rails/rails/pull/21233
eeac6151a5 was reverted (127509c071b4) because it breaks tests.
----------------
ref: 72c1557254
- We must use `authors` fixture with `author_addresses` because of its foreign key constraint.
- Tests require PostgreSQL >= 9.4.2 because it had a bug about `ALTER CONSTRAINTS` and fixed in 9.4.2.
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These are followups for 307065f959f2b34bdad16487bae906eb3bfeaf28,
but TBH I'm personally not very much confortable with this style.
Maybe we could override assert_equal in our test_helper not to warn?
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mtsmfm/disable-referential-integrity-without-superuser-privileges"
This reverts commit eeac6151a55cb7d5f799e1ae33aa64a839cbc3aa, reversing
changes made to 5c40239d3104543e70508360d27584a3e4dc5baf.
Reason: Broke the isolated tests.
https://travis-ci.org/rails/rails/builds/188721346
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privileges
ref: 72c1557254
- We must use `authors` fixture with `author_addresses` because of its foreign key constraint.
- Tests require PostgreSQL >= 9.4.2 because it had a bug about `ALTER CONSTRAINTS` and fixed in 9.4.2.
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assert [1, 3].includes?(2) fails with unhelpful "Asserting failed" message
assert_includes [1, 3], 2 fails with "Expected [1, 3] to include 2" which makes it easier to debug and more obvious what went wrong
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All indentation was normalized by rubocop auto-correct at 80e66cc4d90bf8c15d1a5f6e3152e90147f00772.
But comments was still kept absolute position. This commit aligns
comments with method definitions for consistency.
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Style/SpaceBeforeBlockBraces
Style/SpaceInsideBlockBraces
Style/SpaceInsideHashLiteralBraces
Fix all violations in the repository.
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The current code base is not uniform. After some discussion,
we have chosen to go with double quotes by default.
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Fixes https://github.com/rails/rails/issues/22819
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This clears the transaction record state when the transaction finishes
with a `:committed` status.
Considering the following example where `name` is a required attribute.
Before we had `new_record?` returning `true` for a persisted record:
```ruby
author = Author.create! name: 'foo'
author.name = nil
author.save # => false
author.new_record? # => true
```
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We deprecate the support for passing an argument to force reload in
6eae366d0d2e5d5211eeaf955f56bd1dc6836758. That led to several
deprecation warning when running Active Record test suite.
This commit silence the warnings by properly calling `#reload` on the
association proxy or on the association object instead. However, there
are several places that `ActiveSupport::Deprecation.silence` are used as
those tests actually tests the force reload functionality and will be
removed once `master` is targeted next minor release (5.1).
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I’m renaming all instances of `use_transcational_fixtures` to
`use_transactional_tests` and “transactional fixtures” to
“transactional tests”.
I’m deprecating `use_transactional_fixtures=`. So anyone who is
explicitly setting this will get a warning telling them to use
`use_transactional_tests=` instead.
I’m maintaining backwards compatibility—both forms will work.
`use_transactional_tests` will check to see if
`use_transactional_fixtures` is set and use that, otherwise it will use
itself. But because `use_transactional_tests` is a class attribute
(created with `class_attribute`) this requires a little bit of hoop
jumping. The writer method that `class_attribute` generates defines a
new reader method that return the value being set. Which means we can’t
set the default of `true` using `use_transactional_tests=` as was done
previously because that won’t take into account anyone using
`use_transactional_fixtures`. Instead I defined the reader method
manually and it checks `use_transactional_fixtures`. If it was set then
it should be used, otherwise it should return the default, which is
`true`. If someone uses `use_transactional_tests=` then it will
overwrite the backwards-compatible method with whatever they set.
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/cc @yahonda
This makes it easier for third party adapters to run our tests,
even if that database does not support IF EXISTS.
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Fix rollback of primarykey-less tables
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If you have a table without a primary key, and an `after_commit` callback on that table (ie `has_transactional_callbacks?` returns true), then trying to rollback a transaction involving that record would result in “ActiveModel::MissingAttributeError: can't write unknown attribute ``”
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The hack so skip a Thread test for Ruby 1.9 can be removed now that
Rails requires Ruby >= 2.0.
Conflicts:
activerecord/test/cases/transactions_test.rb
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Before this commit, returning `false` in an ActiveRecord `before_` callback
such as `before_create` would halt the callback chain.
After this commit, the behavior is deprecated: will still work until
the next release of Rails but will also display a deprecation warning.
The preferred way to halt a callback chain is to explicitly `throw(:abort)`.
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