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`nil`, `Numeric`, and `String` are most basic objects which are passed
to `type_cast`. But now each `when *types_which_need_no_typecasting`
evaluation allocates extra two arrays, it makes `type_cast` slower.
The `types_which_need_no_typecasting` was introduced at #15351, but the
method isn't useful (never used any adapters) since all adapters
(sqlite3, mysql2, postgresql, oracle-enhanced, sqlserver) still
overrides the `_type_cast`.
Just expanding the method would make the `type_cast` 2x faster.
```ruby
module ActiveRecord
module TypeCastFast
def type_cast_fast(value, column = nil)
value = id_value_for_database(value) if value.is_a?(Base)
if column
value = type_cast_from_column(column, value)
end
_type_cast_fast(value)
rescue TypeError
to_type = column ? " to #{column.type}" : ""
raise TypeError, "can't cast #{value.class}#{to_type}"
end
private
def _type_cast_fast(value)
case value
when Symbol, ActiveSupport::Multibyte::Chars, Type::Binary::Data
value.to_s
when true then unquoted_true
when false then unquoted_false
# BigDecimals need to be put in a non-normalized form and quoted.
when BigDecimal then value.to_s("F")
when nil, Numeric, String then value
when Type::Time::Value then quoted_time(value)
when Date, Time then quoted_date(value)
else raise TypeError
end
end
end
end
conn = ActiveRecord::Base.connection
conn.extend ActiveRecord::TypeCastFast
Benchmark.ips do |x|
x.report("type_cast") { conn.type_cast("foo") }
x.report("type_cast_fast") { conn.type_cast_fast("foo") }
x.compare!
end
```
```
Warming up --------------------------------------
type_cast 58.733k i/100ms
type_cast_fast 101.364k i/100ms
Calculating -------------------------------------
type_cast 708.066k (± 5.9%) i/s - 3.583M in 5.080866s
type_cast_fast 1.424M (± 2.3%) i/s - 7.197M in 5.055860s
Comparison:
type_cast_fast: 1424240.0 i/s
type_cast: 708066.0 i/s - 2.01x slower
```
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Only define attribute methods from schema cache
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To define the attribute methods for a model, Active Record needs to know
the schema of the underlying table, which is usually achieved by making
a request to the database. This is undesirable behaviour while the app
is booting, for two reasons: it makes the boot process dependent on the
availability of the database, and it means every new process will make
one query for each table, which can cause issues for large applications.
However, if the application is using the schema cache dump feature, then
the schema cache already contains the necessary information, and we can
define the attribute methods without causing any extra database queries.
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Restore an ability that class level `update` without giving ids
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That ability was introduced at #11898 as `Relation#update` without
giving ids, so the ability on the class level is not documented and not
tested.
c83e30d which fixes #33470 has lost two undocumented abilities.
One has fixed at 5c65688, but I missed the ability on the class level.
Removing any feature should not be suddenly happened in a stable version
even if that is not documented.
I've restored the ability and added test case to avoid any regression in
the future.
Fixes #34743.
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Since we already bumped the minimum version of MySQL to 5.5.8 at #33853.
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Since the `current_role` is public API.
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Since the `preventing_writes?` is public API.
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If exist `:nodoc:` before method define, it affects all subsequent
method definitions.
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String properly
This reverts 27c6c07 since `arel_attr.to_s` is not right way to avoid
the type error.
That to_s returns `"#<struct Arel::Attributes::Attribute ...>"`, there
is no reason to match the regex to the inspect form.
And also, the regex path is not covered by our test cases. I've tweaked
the regex for redundant part and added assertions for the regex path.
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directly
Since `migration_context` has `migrations_paths` itself and provides
methods which returning values from parsed migration files, so there is
no reason to use the `parse_migration_filename` low level API directly.
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`connection.assume_migrated_upto_version`
Since #31727, `migrations_paths` in `assume_migrated_upto_version` is no
longer used.
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This was introduced at https://github.com/rails/rails/commit/cfa1df4b07bee5b2bbcbf9edd2ac287b4fb23c18#diff-b36b9c41be30b05dc14d09d7f3b192efR436.
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Reuse AR::Association#find_target method
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Rails 6 requires Ruby 2.5, which introduces `FrozenError`
https://docs.ruby-lang.org/en/2.5.0/NEWS.html
Related to #31520
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eileencodes/raise-less-confusing-error-if-handler-doesnt-exist
Raise helpful error when role doesn't exist
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If you try to call `connected_to` with a role that doesn't have an
established connection you used to get an error that said:
```
>> ActiveRecord::Base.connected_to(role: :i_dont_exist) { Home.first }
ActiveRecord::ConnectionNotEstablished Exception: No connection pool
with 'primary' found.
```
This is confusing because the connection could be established but we
spelled the role wrong.
I've changed this to raise if the `role` used in `connected_to` doesn't
have an associated handler. Users who encounter this should either check
that the role is spelled correctly (writin -> writing), establish a
connection to that role in the model with connects_to, or use the
`database` keyword for the `role`.
I think this will provide a less confusing error message for those
starting out with multiple databases.
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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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