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Deprecate `where.not` working as NOR and will be changed to NAND in Rails 6.1
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`where.not` with polymorphic association is partly fixed incidentally at
213796f (refer #33493, #26207, #17010, #16983, #14161), and I've added
test case e9ba12f to avoid lose that fix accidentally in the future.
In Rails 5.2, `where.not(polymorphic: object)` works as expected as
NAND, but `where.not(polymorphic_type: object.class.polymorphic_name,
polymorphic_id: object.id)` still unexpectedly works as NOR.
To will make `where.not` working desiredly as NAND in Rails 6.1, this
deprecates `where.not` working as NOR. If people want to continue NOR
conditions, we'd encourage to them to `where.not` each conditions
manually.
```ruby
all = [treasures(:diamond), treasures(:sapphire), cars(:honda), treasures(:sapphire)]
assert_equal all, PriceEstimate.all.map(&:estimate_of)
```
In Rails 6.0:
```ruby
sapphire = treasures(:sapphire)
nor = all.reject { |e|
e.estimate_of_type == sapphire.class.polymorphic_name
}.reject { |e|
e.estimate_of_id == sapphire.id
}
assert_equal [cars(:honda)], nor
without_sapphire = PriceEstimate.where.not(
estimate_of_type: sapphire.class.polymorphic_name, estimate_of_id: sapphire.id
)
assert_equal nor, without_sapphire.map(&:estimate_of)
```
In Rails 6.1:
```ruby
sapphire = treasures(:sapphire)
nand = all - [sapphire]
assert_equal [treasures(:diamond), cars(:honda)], nand
without_sapphire = PriceEstimate.where.not(
estimate_of_type: sapphire.class.polymorphic_name, estimate_of_id: sapphire.id
)
assert_equal nand, without_sapphire.map(&:estimate_of)
```
Resolves #31209.
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Related 0ee96d13de29680e148ccb8e5b68025f29fd091c.
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PERF: 20% faster pk attribute access
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I've realized that `user.id` is 20% slower than `user.name` in the
benchmark (https://github.com/rails/rails/pull/35987#issuecomment-483882480).
The reason that performance difference is that `self.class.primary_key`
method call is a bit slow.
Avoiding that method call will make almost attribute access faster and
`user.id` will be completely the same performance with `user.name`.
Before (02b5b8cb):
```
Warming up --------------------------------------
user.id 140.535k i/100ms
user['id'] 96.549k i/100ms
user.name 158.110k i/100ms
user['name'] 94.507k i/100ms
user.changed? 19.003k i/100ms
user.saved_changes? 25.404k i/100ms
Calculating -------------------------------------
user.id 2.231M (± 0.9%) i/s - 11.243M in 5.040066s
user['id'] 1.310M (± 1.3%) i/s - 6.565M in 5.012607s
user.name 2.683M (± 1.2%) i/s - 13.439M in 5.009392s
user['name'] 1.322M (± 0.9%) i/s - 6.615M in 5.003239s
user.changed? 201.999k (±10.9%) i/s - 1.007M in 5.091195s
user.saved_changes? 258.214k (±17.1%) i/s - 1.245M in 5.007421s
```
After (this change):
```
Warming up --------------------------------------
user.id 158.364k i/100ms
user['id'] 106.412k i/100ms
user.name 158.644k i/100ms
user['name'] 107.518k i/100ms
user.changed? 19.082k i/100ms
user.saved_changes? 24.886k i/100ms
Calculating -------------------------------------
user.id 2.768M (± 1.1%) i/s - 13.936M in 5.034957s
user['id'] 1.507M (± 2.1%) i/s - 7.555M in 5.017211s
user.name 2.727M (± 1.5%) i/s - 13.643M in 5.004766s
user['name'] 1.521M (± 1.3%) i/s - 7.634M in 5.018321s
user.changed? 200.865k (±11.1%) i/s - 992.264k in 5.044868s
user.saved_changes? 269.652k (±10.5%) i/s - 1.344M in 5.077972s
```
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Those helper methods makes relation values access 15% slower.
https://gist.github.com/kamipo/e64439f7a206e1c5b5c69d92d982828e
Before (02b5b8cb):
```
Warming up --------------------------------------
#limit_value 237.074k i/100ms
#limit_value = 1 222.052k i/100ms
Calculating -------------------------------------
#limit_value 6.477M (± 2.9%) i/s - 32.479M in 5.019475s
#limit_value = 1 5.297M (± 4.3%) i/s - 26.424M in 4.999933s
```
After (this change):
```
Warming up --------------------------------------
#limit_value 261.109k i/100ms
#limit_value = 1 239.646k i/100ms
Calculating -------------------------------------
#limit_value 7.412M (± 1.6%) i/s - 37.077M in 5.003345s
#limit_value = 1 6.134M (± 1.0%) i/s - 30.675M in 5.000908s
```
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It was never used from the beginning.
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Method call in Ruby is a bit slow.
This makes attribute access 10% faster by avoiding method call
(`sync_with_transaction_state`).
Before (96cf7e0e):
```
Warming up --------------------------------------
user.id 131.291k i/100ms
user['id'] 91.786k i/100ms
user.name 151.605k i/100ms
user['name'] 92.664k i/100ms
user.changed? 17.772k i/100ms
user.saved_changes? 23.909k i/100ms
Calculating -------------------------------------
user.id 1.988M (± 7.0%) i/s - 9.978M in 5.051474s
user['id'] 1.155M (± 5.8%) i/s - 5.783M in 5.022672s
user.name 2.450M (± 4.3%) i/s - 12.280M in 5.021234s
user['name'] 1.263M (± 2.1%) i/s - 6.394M in 5.066638s
user.changed? 175.070k (±13.3%) i/s - 853.056k in 5.011555s
user.saved_changes? 259.114k (±11.8%) i/s - 1.267M in 5.001260s
```
After (this change):
```
Warming up --------------------------------------
user.id 137.625k i/100ms
user['id'] 96.054k i/100ms
user.name 156.379k i/100ms
user['name'] 94.795k i/100ms
user.changed? 18.172k i/100ms
user.saved_changes? 24.337k i/100ms
Calculating -------------------------------------
user.id 2.201M (± 0.5%) i/s - 11.010M in 5.002955s
user['id'] 1.320M (± 1.0%) i/s - 6.628M in 5.021293s
user.name 2.677M (± 1.6%) i/s - 13.449M in 5.024399s
user['name'] 1.314M (± 1.8%) i/s - 6.636M in 5.051444s
user.changed? 190.588k (±11.1%) i/s - 944.944k in 5.065848s
user.saved_changes? 262.782k (±12.1%) i/s - 1.290M in 5.028080s
```
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abhaynikam/change-deprecation-for-dynamic-route-segment-to-6.1
Change the deprecation message for dynamic routes segment to 6.1
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Rails 6.1
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This was accidentally left in, the standard `db:migrate:up` doesn't have
a description so `db:migrate:up:namespace` shouldn't have one either.
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This change adds the ability to run up/down for a database in a multi-db
environment.
If you have an app with a primary and animals database the following
tasks will be generated:
```
VERSION=123 rake db:migrate:up:primary
VERSION=123 rake db:migrate:up:primary
VERSION=123 rake db:migrate:down:primary
VERSION=123 rake db:migrate:up:animals
```
I didn't generate descriptions with them since we don't generate a
description for a single database application.
In addition to this change I've made it so if your application has
multiple databases Rails will raise if you try to run `up` or `down`
without a namespace. This is because we don't know which DB you want to
run `up` or `down` against unless the app tells us, so it's safer to
just block it and recommend using namespaced versions of up/down
respectively.
The output for the raise looks like:
```
You're using a multiple database application. To use `db:migrate:down`
you must run the namespaced task with a VERSION. Available tasks are
db:migrate:down:primary and db:migrate:down:animals.
```
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This reverts commit f656bb301a43fe441af0039e4fafe40a7faa62f8.
Reason: Test in Action View expects the `collection_cache_key` working...
https://github.com/rails/rails/blob/ff6b713f5e729859995f204093ad3f8e08f39ea8/actionview/test/activerecord/relation_cache_test.rb#L21
https://github.com/rails/rails/blob/ff6b713f5e729859995f204093ad3f8e08f39ea8/actionview/test/fixtures/project.rb#L6
https://buildkite.com/rails/rails/builds/60609#d19181fb-fe80-4d1e-891c-1109b540fb4b/981-1009
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Document algorithm: concurrent option for PostgreSQL [ci skip]
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The `collection_cache_key` is private API for a long time, but I've
maintained it in #35848 since it is mentioned in the doc
(https://github.com/rails/rails/pull/35848#discussion_r272011475).
The doc has removed at 1da9a7e4, so there is no longer a reason to
maintain that private API.
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Introduce Actionable Errors
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Actionable errors let's you dispatch actions from Rails' error pages. This
can help you save time if you have a clear action for the resolution of
common development errors.
The de-facto example are pending migrations. Every time pending migrations
are found, a middleware raises an error. With actionable errors, you can
run the migrations right from the error page. Other examples include Rails
plugins that need to run a rake task to setup themselves. They can now
raise actionable errors to run the setup straight from the error pages.
Here is how to define an actionable error:
```ruby
class PendingMigrationError < MigrationError #:nodoc:
include ActiveSupport::ActionableError
action "Run pending migrations" do
ActiveRecord::Tasks::DatabaseTasks.migrate
end
end
```
To make an error actionable, include the `ActiveSupport::ActionableError`
module and invoke the `action` class macro to define the action. An action
needs a name and a procedure to execute. The name is shown as the name of a
button on the error pages. Once clicked, it will invoke the given
procedure.
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https://buildkite.com/rails/rails/builds/60601#81daf2ee-9259-42e5-983d-c57d66499b76/928-939
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This follows #35595.
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This partly reverts 8ca3c286a768038f6b391fd3bfbdfcc299876a1f.
`.is_a?(GeneratedAttributeMethodsBuilder)` doesn't make sense to me, the
module class's `new` creates just an instance of the module class itself.
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When I added the rake tasks for multiple databases I accidentally made
it so you couldn't use Active Record without Railties.
Since getting the database configuration depends on being able to load
Railties (there is no other way to read and parse the yaml file and load
it) I've decided that using multiple databases outside of Rails is a
no-op.
I've changed the code here to return if Rails isn't defined. Then I
changed the other tasks to use `ActiveRecord::Tasks::DatabaseTasks.env`
instead of `Rails.env`. The multi-db tasks can keep using `Rails.env`
because they'll only be generated if we're using Rails and not just
Active Record.
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Fix dirty tracking after rollback.
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Currently the rollback only restores primary key value, `new_record?`,
`destroyed?`, and `frozen?`. Since the `save` clears current dirty
attribute states, retrying save after rollback will causes no change
saved if partial writes is enabled (by default).
This makes `remember_transaction_record_state` remembers original values
then restores dirty attribute states after rollback.
Fixes #15018.
Fixes #30167.
Fixes #33868.
Fixes #33443.
Closes #33444.
Closes #34504.
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Cache versioning enables the same cache key to be reused when the object
being cached changes by moving the volatile part of the cache key out of
the cache key and into a version that is embedded in the cache entry.
This is already occurring when the object being cached is an
`ActiveRecord::Base`, but when caching an `ActiveRecord::Relation`
we are currently still putting the volatile information (max updated at
and count) as part of the cache key.
This PR moves the volatile part of the relations `cache_key` into the
`cache_version` to support recycling cache keys for
`ActiveRecord::Relation`s.
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Cache full MySQL version in schema cache
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* Remove AbstractMysqlAdapter::Version since full_version_string will always
be set.
* Remove nodoc on private methods because private methods are not exposed in
the docs.
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* The database version is cached in all the adapters, but this didn't include
the full MySQL version. Anything that uses the full MySQL version would need
to query the database to get that data even if they're using the schema
cache.
* Now the full MySQL version will be cached in the schema cache via the
Version object.
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Find query_source_location using lazy Enumerator
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This way, we only need to filter the backtrace up to the first non-noise
stack frame.
This also updates noise to be able to deal with being passed a lazy
enum. We don't need this anywhere, but it seemed better for this to be
consistent.
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Bump RuboCop to 0.67.2
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Performance cops will be extracted from RuboCop to RuboCop Performance
when next RuboCop 0.68 will be released.
https://github.com/rubocop-hq/rubocop/issues/5977
RuboCop 0.67 is its transition period.
Since rails/rails repository uses Performance cops, This PR added
rubocop-performance gem to Gemfile.
And this PR fixes some offenses using the following auto-correct.
```console
% bundle exec rubocop -a
Offenses:
activerecord/test/cases/connection_adapters/connection_handlers_multi_db_test.rb:212:26:
C: [Corrected] Layout/SpaceAroundOperators: Operator =
> should be surrounded by a single space.
"primary" => { adapter: "sqlite3", database: "db/primary.sqlite3" }
^^
activerecord/test/cases/connection_adapters/connection_handlers_multi_db_test.rb:239:26:
C: [Corrected] Layout/SpaceAroundOperators: Operator => should be
surrounded by a single space.
"primary" => { adapter: "sqlite3", database: "db/primary.sqlite3" }
^^
actionview/test/template/resolver_shared_tests.rb:1:1: C: [Corrected]
Style/FrozenStringLiteralComment: Missing magic comment #
frozen_string_literal: true.
module ResolverSharedTests
^
actionview/test/template/resolver_shared_tests.rb:10:33: C: [Corrected]
Layout/SpaceAroundEqualsInParameterDefault: Surrounding space missing in
default value assignment.
def with_file(filename, source="File at #{filename}")
^
actionview/test/template/resolver_shared_tests.rb:106:5: C: [Corrected]
Rails/RefuteMethods: Prefer assert_not_same over refute_same.
refute_same a, b
^^^^^^^^^^^
2760 files inspected, 5 offenses detected, 5 offenses corrected
```
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[ci skip]
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Since 8180c39, remaining transaction state is cleared in
`force_clear_transaction_record_state` to less work
`sync_with_transaction_state`. But it caused a race condition that
`@transaction_state` would be cleared by other threads if the state is
finalized.
To work as before, snapshot `@transaction_state` to local variable not
to refer `@transaction_state` directly.
Fixes #35983.
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Remove `required: true` from the model generator template
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`belongs_to` association have `required: true` by default
https://github.com/rails/rails/pull/18937 onwards so we don't need it
in the generator template.
We still need the code for required in the command line generator as
it adds `null: false` in the migration.
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eileencodes/fix-connection-when-handler-doesnt-exist
Ensure a handler is set when using `connected_to`
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After looking at #35800 there is definitely an issue in the
`connected_to` method although it's generally behaving. Here are the
details:
1) I added a default connection role - writing - to the connection
handler lookup. I did this because otherwise if you did this:
```
connected_to(databse: :development)
```
And development wasn't a pre-established role it would create a new
handler and connect using that. I don't think this is right so I've
updated it to pick up the default (:writing) unless otherwise specified.
To set a handler when using the database version pass a hash like you
would to `connects_to`:
```
connected_to(database: { readonly_slow: :development })
```
This will connect the `development` database to the `readonly_slow`
handler/role.
2) I updated the tests to match this behavior that we expect.
3) I updated the documentation to clarify that using `connected_to` with
a `database` key will establish a new connection every time. This is
exactly how `establish_connection` behaves and I feel this is correct.
If you want to only establish a connection once you should do that in
the model with `connects_to` and then swap on the role instead of on the
database hash/key.
4) In regards to #35800 this fixes the case where you pass a symbol to
the db and not a hash. But it doesn't fix a case where you may pass an
unknown handler to an abstract class that's not connected. This is
tricky because technical AbstractFoo doesn't have any connections except
for through ApplicationRecord, so in the case of the application that
was shared we should only be swapping connections on ActiveRecord::Base
because there are no other actual connections - AbstractFoo isn't needed
since it's not establishing a new connection. If we need AbstractFoo to
connect to a new handler we should establish that connection with the
handler in AbstractFoo before trying to shard there.
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Before this fix, `touch` only clears dirty tracking for touched
attributes, doesn't track saved (touched) changes.
This fixes that tracks saved changes and carry over remaining changes.
Fixes #33429.
Closes #34306.
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make change_column_comment and change_table_comment invertible
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We can revert migrations using `change_column_comment` or
`change_table_comment` at current master.
However, results are not what we expect: comments are remained in new
status.
This change tells previous comment to these methods in a way like
`change_column_default`.
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All transaction states (:committed, :fully_committed, :rolledback,
:fully_rolledback) are mutually exclusive.
And also, `force_clear_transaction_record_state` should clear
`@transaction_state` as well.
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`set_transaction_state`
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`add_to_transaction` was added at da840d1, but it should not be called
by except internal, since `remember_transaction_record_state` should be
called only once before saving.
And also, currently `add_to_transaction` doesn't always add the record
to transaction since da8de91, that is the reason hard to use that even
in internal.
Even if `add_to_transaction` ensure to add the record to transaction,
that is an internal concern, people don't need to explicitly call
`add_to_transaction`.
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Add validation to subclass in tests to avoid polluting parent class
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These two tests currently both define acceptance validators on the same
class, Topic. This means that in either one test or the other, there are
not one but *two* instances of the LazilyDefineAttributes module
builder in the class' ancestors, which can result in unpredictable
results.
Subclassing Topic in each test avoids conflicts.
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use PostgreSQL's bulk_alter_table implementation
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