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* Add ability to unset preventing writeseileencodes2019-08-021-2/+2
| | | | | | | | | | | Previously if an app attempts to do a write inside a read request it will be impossilbe to switch back to writing to the primary. This PR adds an argument to the `while_preventing_writes` so that we can make sure to turn it off if we're doing a write on a primary. Fixes #36830 Co-authored-by: John Crepezzi <john.crepezzi@gmail.com>
* No private defRafael Mendonça França2019-08-011-1/+2
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* It may be better to explicitly require 'object/try' where we call `try`Akira Matsuda2019-08-011-0/+1
| | | | | | In most cases it works now without explicit require because it's accidentally required through active_support/core_ext/date_and_time/calculations.rb where we still call `try`, but that would stop working if we changed the Calculations implementation and remove the require call there.
* Use `try` only when we're unsure if the receiver would respond_to the methodAkira Matsuda2019-08-011-1/+1
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* Move DatabaseAlreadyExists detection to DB adapterJohn Hawthorn2019-07-292-0/+6
| | | | | | | | | | | | | | | | | | | | Previously it was the responsibility of the database tasks to translate the invalid statement from creating a duplicate database into an ActiveRecord::Tasks::DatabaseAlreadyExists error. It's actually easier for us to do this detection inside of the adapter, where we already do a case statement on the return code to translate the error. This commit introduces ActiveRecord::DatabaseAlreadyExists, a subclass of StatementInvalid, and updates both AbstractMysqlAdapter and PostgresqlAdapter to return this more specific exception in that case. Because this is a subclass of the old exception, StatementInvalid, it should be backwards compatible with any code expecting that from create_database. This works for both create_database and exectute("CREATE DATABASE")
* Update links to new MySQL server errors reference page [ci skip]Carlos Antonio da Silva2019-07-271-1/+1
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* Use match? where we don't need MatchDataAkira Matsuda2019-07-271-1/+1
| | | | We're already running Performance/RegexpMatch cop, but it seems like the cop is not always =~ justice
* Merge pull request #36412 from robotdana/compact_blankRafael Mendonça França2019-07-253-5/+5
|\ | | | | | | Add compact_blank shortcut for reject(&:blank?)
| * Use compact_blank throughout railsDana Sherson2019-06-053-5/+5
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* | Merge pull request #36740 from ↵Rafael França2019-07-251-1/+1
|\ \ | | | | | | | | | | | | stanhu/sh-fix-index-exists-postgresql-partial-index Fix index_exists? for PostgreSQL expression indexes
| * | Fix index_exists? for PostgreSQL expression indexesStan Hu2019-07-241-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | Previously Rails expected indexes to be an array of columns, but for PostgreSQL a expression index can just be a string of text. Handle this by forcing `Index#columns` to be an Array inside `index_exists?`. Closes #36739
* | | Merge pull request #36580 from Shopify/schema-cache-deuplication-from-databaseRafael França2019-07-241-5/+15
|\ \ \ | |/ / |/| | Also deduplicate schema cache structure when they are read from the database
| * | Also deduplicate schema cache structure when they are read from the databaseJean Boussier2019-07-011-5/+15
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* | | Merge pull request #36665 from jmschneider/masterRafael Mendonça França2019-07-231-2/+2
|\ \ \ | | | | | | | | | | | | Make currency symbols optional for money column type in PostgreSQL
| * | | Make currency symbols optional for money column type in PostgreSQLJoel Schneider2019-07-121-2/+2
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* | | | Raise specific exception on Mysql2::Error::TimeoutErrorKir Shatrov2019-07-161-1/+5
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* | | active_support/deprecation has to be already required via ↵Akira Matsuda2019-07-123-4/+0
| | | | | | | | | | | | active_support/rails.rb
* | | Merge pull request #36653 from y-yagi/check_error_number_instead_of_messageYuji Yaginuma2019-07-111-1/+3
|\ \ \ | | | | | | | | MySQL: Check error number instead of a message
| * | | MySQL: Check error number instead of a messageyuuji.yaginuma2019-07-111-1/+3
| | | | | | | | | | | | | | | | To be able to check regardless of locale.
* | | | Merge pull request #36637 from Shopify/share-quote-cacheRyuta Kamizono2019-07-114-7/+14
|\ \ \ \ | | | | | | | | | | Share the column and table name quote cache between connections
| * | | | Share the column and table name quote cache between connectionsJean Boussier2019-07-094-7/+14
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* | | | Merge pull request #36618 from engwan/fix-query-cache-with-shared-ar-connectionEileen M. Uchitelle2019-07-102-5/+9
|\ \ \ \ | |/ / / |/| | | Fix query cache when using shared connections
| * | | Fix query cache when using shared connectionsHeinrich Lee Yu2019-07-082-5/+9
| | | | | | | | | | | | | | | | | | | | Enables the query cache on the correct connection when shared connections across threads are enabled
* | | | Merge pull request #36612 from ↵Yuji Yaginuma2019-07-091-1/+1
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | y-yagi/make_setup_works_when_using_with_locales_other_than_en Make "bin/setup" works when using PostgreSQL with locales other than en locale
| * | | | Make "bin/setup" works when using PostgreSQL with locales other than en localeyuuji.yaginuma2019-07-071-1/+1
| |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The PostgreSQL adapter uses an error message to determine if a database exists or not. https://github.com/rails/rails/blob/74ef67b16de67d2ae2f996e50a18a93aebf68fe6/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb#L49 However, this message is properly converted according to the locale. So this check does not work correctly for non-en locales. As a result, `db:prepare` cannot correctly determine if a database exists, and `bin/setup`, which depends on the task, does not work correctly if the database does not exist. It checks to exist if the "does not exist" exists, but that message is also used in other error messages(e.g. "role does not exist"). So cannot check correctly also in en locale. https://github.com/postgres/postgres/blob/master/src/backend/po/ja.po#L10542 It would be fine could check the status, but in my understanding, when a connecting fails, only the status `CONNECTION_BAD` be used, and it seems that details cannot be checked. https://www.postgresql.org/docs/11/libpq-status.html#LIBPQ-PQSTATUS I fixed to check whether the error message contains a database name. This is probably not accurate but can check it better now.
* | | | Merge branch 'master' into add_database_exist_methodGuillermo Iguaran2019-07-0811-16/+133
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| * | | MySQL: Fix schema dumping `enum` and `set` columns correctlyRyuta Kamizono2019-07-051-1/+3
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | `enum` and `set` are typed cast as `:string`, but currently the `:string` type is incorrectly reused for schema dumping. A cast type on columns is not always the same with `sql_type`, this fixes schema dumping `enum` and `set` columns to use `sql_type` instead of `type` correctly.
| * | Add "SCHEMA" to the query in `configure_connection` like as other adaptersRyuta Kamizono2019-06-281-1/+1
| | | | | | | | | | | | | | | | | | | | | This makes to be able to ignore the query in `assert_queries` even if accidentally reconnected a connection. https://buildkite.com/rails/rails/builds/61917#4c49187a-3173-4d5c-8a8d-d65768f5bfc9/1000-1799
| * | warning: instance variable @serial not initialized (#36556)utilum2019-06-281-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduced in bba7c63a663b073034f4c73f0d59655751694e5a Before: ``` $ TESTOPTS="-n=/test_yaml_dump_and_load/" bundle exec rake test:postgresql :scisors: ... :scisors: Using postgresql Run options: -n=/test_yaml_dump_and_load/ --seed 36896 /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized /home/u/code/rails/activerecord/lib/active_record/connection_adapters/postgresql/column.rb:15: warning: instance variable @serial not initialized . Finished in 0.195325s, 5.1197 runs/s, 35.8376 assertions/s. 1 runs, 7 assertions, 0 failures, 0 errors, 0 skips ``` Co-authored-by: Ryuta Kamizono <kamipo@gmail.com>
| * | Schema Cache: extract deduplication commonalityKasper Timm Hansen2019-06-211-10/+15
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| * | Also deduplicate schema cache data when using the init_with interfaceJean Boussier2019-06-211-6/+6
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| * | Stop serializing and parsing columns_hash in Active Record schema cachesJean Boussier2019-06-191-8/+5
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| * | Merge pull request #35891 from Shopify/schema-cache-deduplicationKasper Timm Hansen2019-06-198-2/+105
| |\ \ | | | | | | | | Deduplicate various Active Record schema cache structures
| | * | Deduplicate various Active Record schema cache structuresJean Boussier2019-06-038-2/+105
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Real world database schemas contain a lot of duplicated data. Some column names like `id`, `created_at` etc can easily be repeated hundreds of times. Same for SqlTypeMetada, most database will contain only a limited number of possible combinations. This result in a lot of wasted memory. The idea here is to make these data sctructures immutable, use a registry to substitute similar instances with pre-existing ones.
| * | | Avoid redundant `time.getutc` call if it is already utc time objectRyuta Kamizono2019-06-181-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently `type.serialize` and `connection.{quote|type_cast}` for a time object always does `time.getutc` call regardless of whether it is already utc time object or not, that duplicated proccess (`connection.type_cast(type.serialize(time))`) allocates extra/useless time objects for each type casting. This avoids that redundant `time.getutc` call if it is already utc time object. In the case of a model has timestamps (`created_at` and `updated_at`), it avoids 6,000 time objects allocation for 1,000 times `model.save`. ```ruby ObjectSpace::AllocationTracer.setup(%i{path line type}) pp ObjectSpace::AllocationTracer.trace { 1_000.times { User.create } }.select { |k, _| k[0].end_with?("quoting.rb", "time_value.rb") } ``` Before (c104bfe424e6cebe9c8e85a38515327a6c88b1f8): ``` {["~/rails/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb", 203, :T_ARRAY]=>[1004, 0, 778, 0, 1, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb", 220, :T_STRING]=>[2, 0, 2, 1, 1, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb", 209, :T_ARRAY]=>[8, 0, 8, 1, 1, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb", 57, :T_ARRAY]=>[4, 0, 4, 1, 1, 0], ["~/rails/activemodel/lib/active_model/type/helpers/time_value.rb", 17, :T_DATA]=>[4000, 0, 3096, 0, 1, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb", 120, :T_DATA]=>[2000, 0, 1548, 0, 1, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb", 126, :T_STRING]=>[4000, 0, 3096, 0, 1, 0]} ``` After (this change): ``` {["~/rails/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb", 203, :T_ARRAY]=>[1004, 0, 823, 0, 1, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb", 220, :T_STRING]=>[2, 0, 2, 1, 1, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb", 209, :T_ARRAY]=>[8, 0, 8, 1, 1, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb", 57, :T_ARRAY]=>[4, 0, 4, 1, 1, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/abstract/quoting.rb", 126, :T_STRING]=>[2000, 0, 1638, 0, 1, 0]} ```
* | | | Add database_exists? method to connection adaptersGuilherme Mansur2019-06-174-0/+27
|/ / / | | | | | | | | | | | | | | | | | | | | | When SQLite connects it will silently create a database if the database does not exist. This behaviour causes different issues because of inconsistent behaviour between adapters: #36383, #32914. This commit adds a `database_exists?` method as a way to check the database without creating it. This is a stepping stone to fully resolving the above issues.
* | | No allocation `Arel::Visitors::ToSql#visit`Ryuta Kamizono2019-06-151-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Each `visit o, collector` allocates one extra array due to receiving args by splat array. https://github.com/rails/rails/blob/2c3332cc4c0fa77dbe2e13e8a792f80fbd8f4ad3/activerecord/lib/arel/visitors/visitor.rb#L27-L29 Currently 1,000 times `User.where(id: 1).to_sql` allocates 13,000 arrays in `visitor.accept`. This avoids receiving args by splat array, it makes `visitor.accept` no array allocation. ```ruby ObjectSpace::AllocationTracer.setup(%i{path line type}) pp ObjectSpace::AllocationTracer.trace { 1_000.times { User.where(id: 1).to_sql } }.select { |k, _| k[2] == :T_ARRAY && k[0].end_with?("visitor.rb", "to_sql.rb") } ``` Before (2c3332cc4c0fa77dbe2e13e8a792f80fbd8f4ad3): ``` {["~/rails/activerecord/lib/arel/visitors/to_sql.rb", 18, :T_ARRAY]=>[1000, 0, 0, 0, 0, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/determine_if_preparable_visitor.rb", 11, :T_ARRAY]=>[1000, 0, 0, 0, 0, 0], ["~/rails/activerecord/lib/arel/visitors/visitor.rb", 12, :T_ARRAY]=>[1000, 0, 0, 0, 0, 0], ["~/rails/activerecord/lib/arel/visitors/to_sql.rb", 788, :T_ARRAY]=>[3000, 0, 0, 0, 0, 0], ["~/rails/activerecord/lib/arel/visitors/to_sql.rb", 794, :T_ARRAY]=>[3000, 0, 0, 0, 0, 0], ["~/rails/activerecord/lib/arel/visitors/to_sql.rb", 156, :T_ARRAY]=>[1000, 0, 0, 0, 0, 0], ["~/rails/activerecord/lib/arel/visitors/to_sql.rb", 443, :T_ARRAY]=>[1000, 0, 0, 0, 0, 0], ["~/rails/activerecord/lib/arel/visitors/to_sql.rb", 603, :T_ARRAY]=>[1000, 0, 0, 0, 0, 0], ["~/rails/activerecord/lib/arel/visitors/to_sql.rb", 611, :T_ARRAY]=>[1000, 0, 0, 0, 0, 0]} ``` After (this change): ``` {} ```
* | | Move while_preventing_writes from conn to handlereileencodes2019-06-142-15/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If we put the `while_preventing_writes` on the connection then the middleware that sends reads to the primary and ensures they can't write will not work. The `while_preventing_writes` will only be applied to the connection which it's called on - which in the case of the middleware is Ar::Base. This worked fine if you called it directly like `OtherDbConn.connection.while_preventing_writes` but Rails didn't have a way of knowing you wanted to call it on all the connections. The change here moves the `while_preventing_writes` method from the connection to the handler so that it can block writes to all queries for that handler. This will apply to all the connections associated with that handler.
* | | Move SchemaMigration to migration_contexteileencodes2019-06-142-5/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This PR moves the `schema_migration` to `migration_context` so that we can access the `schema_migration` per connection. This does not change behavior of the SchemaMigration if you are using one database. This also does not change behavior of any public APIs. `Migrator` is private as is `MigrationContext` so we can change these as needed. We now need to pass a `schema_migration` to `Migrator` so that we can run migrations on the right connection outside the context of a rake task. The bugs this fixes were discovered while debugging the issues around the SchemaCache on initialization with multiple database. It was clear that `get_all_versions` wouldn't work without these changes outside the context of a rake task (because in the rake task we establish a connection and change AR::Base.connection to the db we're running on). Because the `SchemaCache` relies on the `SchemaMigration` information we need to make sure we store it per-connection rather than on ActiveRecord::Base. [Eileen M. Uchitelle & Aaron Patterson]
* | | Allocation on demand in transactionsRyuta Kamizono2019-06-141-20/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently 1,000 transactions creates 10,000 objects regardless whether it is necessary or not. This makes allocation on demand in transactions, now 1,000 transactions creates required 5,000 objects only by default. ```ruby ObjectSpace::AllocationTracer.setup(%i{path line type}) pp ObjectSpace::AllocationTracer.trace { 1_000.times { User.create } }.select { |k, _| k[0].end_with?("transaction.rb") } ``` Before (95d038f): ``` {["~/rails/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb", 209, :T_HASH]=>[1000, 0, 715, 0, 1, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb", 210, :T_OBJECT]=>[1000, 0, 715, 0, 1, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb", 210, :T_HASH]=>[1000, 0, 715, 0, 1, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb", 80, :T_OBJECT]=>[1000, 0, 715, 0, 1, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb", 8, :T_ARRAY]=>[1000, 0, 715, 0, 1, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb", 81, :T_ARRAY]=>[1000, 0, 715, 0, 1, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb", 289, :T_STRING]=>[1000, 0, 714, 0, 1, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb", 116, :T_ARRAY]=>[1000, 0, 714, 0, 1, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb", 120, :T_ARRAY]=>[1000, 0, 714, 0, 1, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb", 121, :T_HASH]=>[1000, 0, 714, 0, 1, 0]} ``` After (this change): ``` {["~/rails/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb", 213, :T_HASH]=>[1000, 0, 739, 0, 1, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb", 214, :T_OBJECT]=>[1000, 0, 739, 0, 1, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb", 214, :T_HASH]=>[1000, 0, 739, 0, 1, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb", 81, :T_OBJECT]=>[1000, 0, 739, 0, 1, 0], ["~/rails/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb", 304, :T_STRING]=>[1000, 0, 738, 0, 1, 0]} ```
* | | Make ActiveRecord `ConnectionPool.connections` thread-safe. (#36473)jeffdoering2019-06-131-1/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Make ActiveRecord `ConnectionPool.connections` thread-safe. ConnectionPool documentation is clear on the need to synchronize access to @connections but also states that public methods do not require synchronization. Existing code exposed @connections directly via attr_reader. The fix uses synchronize() to lock @connections then returns a copy to the caller using Array.dup(). Includes comments on the connections method that thread-safe access to the connections array does not imply thread-safety of accessing methods on the actual connections. Adds a test-case that modifies the pool using a supported method in one thread while a second thread accesses pool.connections. The test fails without this patch. Fixes #36465. * Update activerecord/test/cases/connection_pool_test.rb [jeffdoering + Rafael Mendonça França]
* | | Merge pull request #36472 from kamipo/empty_line_only_before_access_modifierRyuta Kamizono2019-06-1322-26/+0
|\ \ \ | | | | | | | | Enable `Layout/EmptyLinesAroundAccessModifier` cop
| * | | Enable `Layout/EmptyLinesAroundAccessModifier` copRyuta Kamizono2019-06-1322-26/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We sometimes say "✂️ newline after `private`" in a code review (e.g. https://github.com/rails/rails/pull/18546#discussion_r23188776, https://github.com/rails/rails/pull/34832#discussion_r244847195). Now `Layout/EmptyLinesAroundAccessModifier` cop have new enforced style `EnforcedStyle: only_before` (https://github.com/rubocop-hq/rubocop/pull/7059). That cop and enforced style will reduce the our code review cost.
* | | | Clear schema cache when a table is created/dropped/renamedRyuta Kamizono2019-06-134-0/+11
|/ / / | | | | | | | | | Otherwise `Model.table_exists?` returns the staled cache result.
* | | Allow column name with function (e.g. `length(title)`) as safe SQL stringRyuta Kamizono2019-06-104-8/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, almost all "Dangerous query method" warnings are false alarm. As long as almost all the warnings are false alarm, developers think "Let's ignore the warnings by using `Arel.sql()`, it actually is false alarm in practice.", so I think we should effort to reduce false alarm in order to make the warnings valuable. This allows column name with function (e.g. `length(title)`) as safe SQL string, which is very common false alarm pattern, even in the our codebase. Related 6c82b6c99, 6607ecb2a, #36420. Fixes #32995.
* | | Allow `column_name AS alias` as safe SQL stringRyuta Kamizono2019-06-104-0/+4
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* | | Refactor `disallow_raw_sql!` to avoid `split(/\s*,\s*/)` to order argsRyuta Kamizono2019-06-094-19/+54
| | | | | | | | | | | | | | | `split(/\s*,\s*/)` to order args and then `permit.match?` one by one is much slower than `permit.match?` once.
* | | Merge pull request #36420 from kamipo/quoted_identifier_regexRyuta Kamizono2019-06-064-5/+105
|\ \ \ | | | | | | | | Allow quoted identifier string as safe SQL string
| * | | Allow quoted identifier string as safe SQL stringRyuta Kamizono2019-06-064-5/+105
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently `posts.title` is regarded as a safe SQL string, but `"posts"."title"` (it is a result of `quote_table_name("posts.title")`) is regarded as an unsafe SQL string even though a result of `quote_table_name` should obviously be regarded as a safe SQL string, since the column name matcher doesn't respect quotation, it is a little annoying. This changes the column name matcher to allow quoted identifiers as safe SQL string, now all results of the `quote_table_name` are regarded as safe SQL string.
* / | Move schema cache from connection to pooleileencodes2019-06-054-5/+33
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This PR proposes moving the schema cache from the connection to the pool so the connection can ask the pool for the cache. In a future PR our goal is to be able to read the yaml file from the pool so we can get rid of the `active_record.check_schema_cache_dump` initializer. This will fix the issues surrounding dumping the schema cache and mulitple databases. Why do we want to get rid of the initializer you ask? Well I was looking at #34449 and trying to make it work for our usecase and it revealed A LOT of problems. There are a few issues that I will fix in remaining PRs with SchemaMigration, but there's a big glaring issue with this initializer. When you have an application with multiple databases we'll need to loop through all the configurations and set the schema cache on those connections. The problem is on initialization we only have one connection - the one for Ar::Base. This is fine in a single db application but not fine in multi-db. If we follow the pattern in #34449 and establish a connection to those other dbs we will end up setting the cache on the _connection object_ rather than on all connections that connect for that config. So even though we looped through the configs and assigned the cache the cache will not be set (or will be set wrong) once the app is booted because the connection objects after boot are _different_ than the connection objects we assigned the cache to. After trying many different ways to set the schema cache `@tenderlove` and I came to the conclusion that the initializer is problematic, as is setting the schema cache twice. This is part 1 to move the cache to the pool so the cache can read from the schema cache yaml file instead of setting it when initializing the app. To do this we have created a `NullPool` that initializes an empty cache. I put the `get_schema_cache` and `set_schema_cache` in an `AbstractPool` so we can share code between `ConnectionPool` and `NullPool` instead of duplicating code. Now we only need to set the schema_cache on the pool rather than the connection. In `discard!` we need to unset the connection from the schema_cache - we still want the cache just not the connection.
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