| Commit message (Collapse) | Author | Age | Files | Lines |
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Wrap Mysql count of deleted rows in lock block to avoid conflict in test
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Raise `ArgumentError` for invalid `:limit` and `:precision` like as other options
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options
When I've added new `:size` option in #35071, I've found that invalid
`:limit` and `:precision` raises `ActiveRecordError` unlike other
invalid options.
I think that is hard to distinguish argument errors and statement
invalid errors since the `StatementInvalid` is a subclass of the
`ActiveRecordError`.
https://github.com/rails/rails/blob/c9e4c848eeeb8999b778fa1ae52185ca5537fffe/activerecord/lib/active_record/errors.rb#L103
```ruby
begin
# execute any migration
rescue ActiveRecord::StatementInvalid
# statement invalid
rescue ActiveRecord::ActiveRecordError, ArgumentError
# `ActiveRecordError` except `StatementInvalid` is maybe an argument error
end
```
I'd say this is the inconsistency worth fixing.
Before:
```ruby
add_column :items, :attr1, :binary, size: 10 # => ArgumentError
add_column :items, :attr2, :decimal, scale: 10 # => ArgumentError
add_column :items, :attr3, :integer, limit: 10 # => ActiveRecordError
add_column :items, :attr4, :datetime, precision: 10 # => ActiveRecordError
```
After:
```ruby
add_column :items, :attr1, :binary, size: 10 # => ArgumentError
add_column :items, :attr2, :decimal, scale: 10 # => ArgumentError
add_column :items, :attr3, :integer, limit: 10 # => ArgumentError
add_column :items, :attr4, :datetime, precision: 10 # => ArgumentError
```
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The `table_name` was added at #23677 to detect whether serial column or
not correctly.
We can do that detection before initialize column object, it makes
column object size smaller, and it probably helps column object
de-duplication.
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Follow up of c9e4c848eeeb8999b778fa1ae52185ca5537fffe.
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Cache database version in schema cache
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* The database version will get cached in the schema cache file during the
schema cache dump. When the database version check happens, the version will
be pulled from the schema cache and thus avoid querying the database for
the version.
* If the schema cache file doesn't exist, we'll query the database for the
version and cache it on the schema cache object.
* To facilitate this change, all connection adapters now implement
#get_database_version and #database_version. #database_version returns the
value from the schema cache.
* To take advantage of the cached database version, the database version check
will now happen after the schema cache is set on the connection in the
connection pool.
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https://buildkite.com/rails/rails/builds/59632#fe3d2551-569a-46c8-94f3-7abe835d4d7a/122-153
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Before:
```
(16.4ms) TRUNCATE TABLE `author_addresses`
(20.5ms) TRUNCATE TABLE `authors`
(19.4ms) TRUNCATE TABLE `posts`
```
After:
```
Truncate Tables (19.5ms) TRUNCATE TABLE `author_addresses`;
TRUNCATE TABLE `authors`;
TRUNCATE TABLE `posts`
```
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Also, improving an argument error message for `limit`, extracting around
`type_to_sql` code into schema statements, and more exercise tests.
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It makes to ease to handle all short-hand methods (e.g. validates
arguments etc).
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In MySQL, the text column size is 65,535 bytes by default (1 GiB in
PostgreSQL). It is sometimes too short when people want to use a text
column, so they sometimes change the text size to mediumtext (16 MiB) or
longtext (4 GiB) by giving the `limit` option.
Unlike MySQL, PostgreSQL doesn't allow the `limit` option for a text
column (raises ERROR: type modifier is not allowed for type "text").
So `limit: 4294967295` (longtext) couldn't be used in Action Text.
I've allowed changing text and blob size without giving the `limit`
option, it prevents that migration failure on PostgreSQL.
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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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The indexing issue on `utf8mb4` columns is resolved since MySQL 5.7.9.
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consistently
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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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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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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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And hide the `READ_QUERY` internal constant.
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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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When running `exec_query` with `INSERT` (or other write commands), MySQL
returns `ActiveRecord::Result`.
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MySQL 8.0.13 and higher supports default value to be a function or
expression.
https://dev.mysql.com/doc/refman/8.0/en/create-table.html
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MySQL 8.0.13 and higher supports functional key parts that index
expression values rather than column or column prefix values.
https://dev.mysql.com/doc/refman/8.0/en/create-index.html
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Since Rails 6.0 will support Ruby 2.4.1 or higher
`# frozen_string_literal: true` magic comment is enough to make string object frozen.
This magic comment is enabled by `Style/FrozenStringLiteralComment` cop.
* Exclude these files not to auto correct false positive `Regexp#freeze`
- 'actionpack/lib/action_dispatch/journey/router/utils.rb'
- 'activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb'
It has been fixed by https://github.com/rubocop-hq/rubocop/pull/6333
Once the newer version of RuboCop released and available at Code Climate these exclude entries should be removed.
* Replace `String#freeze` with `String#-@` manually if explicit frozen string objects are required
- 'actionpack/test/controller/test_case_test.rb'
- 'activemodel/test/cases/type/string_test.rb'
- 'activesupport/lib/active_support/core_ext/string/strip.rb'
- 'activesupport/test/core_ext/string_ext_test.rb'
- 'railties/test/generators/actions_test.rb'
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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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If a transaction is opened and closed without any queries being run, we
can safely omit the `BEGIN` and `COMMIT` statements, as they only exist
to modify the connection's behaviour inside the transaction. This
removes the overhead of those statements when saving a record with no
changes, which makes workarounds like `save if changed?` unnecessary.
This implementation buffers transactions inside the transaction manager
and materializes them the next time the connection is used. For this to
work, the adapter needs to guard all connection use with a call to
`materialize_transactions`. Because of this, adapters must opt in to get
this new behaviour by implementing `supports_lazy_transactions?`.
If `raw_connection` is used to get a reference to the underlying
database connection, the behaviour is disabled and transactions are
opened eagerly, as we can't know how the connection will be used.
However when the connection is checked back into the pool, we can assume
that the application won't use the reference again and reenable lazy
transactions. This prevents a single `raw_connection` call from
disabling lazy transactions for the lifetime of the connection.
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Use attr_reader/attr_writer instead of methods
method is 12% slower
Use flat_map over map.flatten(1)
flatten is 66% slower
Use hash[]= instead of hash.merge! with single arguments
merge! is 166% slower
See https://github.com/rails/rails/pull/32337 for more conversation
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#33363 has two regressions. First one is that `insert_fixtures_set` is
failed if flags is an array. Second one is that connection flags are not
restored if `set_server_option` is not supported.
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The TIME, DATETIME, and TIMESTAMP types [have supported](https://mariadb.com/kb/en/library/microseconds-in-mariadb/)
a fractional seconds precision from 0 to 6.
Default values from time columns with specified precision is read
as `current_timestamp(n)` from information schema.
rake `db:schema:dump` produces `schema.rb` **without** default values for time columns with the specified precision:
t.datetime "last_message_at", precision: 6, null: false
rake `db:schema:dump` produces `schema.rb` **with** default values for time columns with the specified precision:
t.datetime "last_message_at", precision: 6, default: -> { "current_timestamp(6)" }, null: false
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There's no need to wrap the statement in a hash with a single key.
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Duplicated method name list is no longer needed.
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@connection.more_results?`
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Since #29504, mysql2 adapter lost ability to insert zero value on
primary key due to enforce `NO_AUTO_VALUE_ON_ZERO` disabled.
That is for using `DEFAULT` on auto increment column, but we can use
`NULL` instead in that case.
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Actually SQLite3 doesn't have JSON storage class (so it is stored as a
TEXT like Date and Time). But emulating JSON types is convinient for
making database agnostic migrations.
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`options_for_index_columns`
And placed `add_options_for_index_columns` in `schema_statements.rb`
consistently to ease to find related code.
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Currently `AUTO_INCREMENT` is implicitly used in the default primary key
definition. But `AUTO_INCREMENT` is not only used for single column
primary key, but also for composite primary key. In that case,
`auto_increment: true` should be dumped explicitly in the
`db/schema.rb`.
Fixes #30894.
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Currently the normalization only exists in `primary_key` shorthand. It
should be moved to `new_column_definition` to also affect to
`add_column` with primary key.
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Currently `SchemaDumper` is only customizable for column options. But
3rd party connection adapters (oracle-enhanced etc) need to customizable
for table or index dumping also. To make it possible, I introduced
adapter specific `SchemaDumper` classes for that.
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