From 3239b6a98ad7c99b6bd8cd6345c59430e5d38083 Mon Sep 17 00:00:00 2001 From: Ryuta Kamizono Date: Thu, 13 Nov 2014 04:30:57 +0900 Subject: Add `SchemaMigration.create_table` support any unicode charsets for MySQL. MySQL unicode support is not only `utf8mb4`. Then, The index length problem is not only `utf8mb4`. http://dev.mysql.com/doc/refman/5.6/en/charset-unicode.html SELECT * FROM information_schema.character_sets WHERE maxlen > 3; +--------------------+----------------------+------------------+--------+ | CHARACTER_SET_NAME | DEFAULT_COLLATE_NAME | DESCRIPTION | MAXLEN | +--------------------+----------------------+------------------+--------+ | utf8mb4 | utf8mb4_general_ci | UTF-8 Unicode | 4 | | utf16 | utf16_general_ci | UTF-16 Unicode | 4 | | utf16le | utf16le_general_ci | UTF-16LE Unicode | 4 | | utf32 | utf32_general_ci | UTF-32 Unicode | 4 | +--------------------+----------------------+------------------+--------+ --- activerecord/CHANGELOG.md | 4 ++++ .../connection_adapters/abstract_mysql_adapter.rb | 10 ++++++++++ .../lib/active_record/connection_adapters/mysql2_adapter.rb | 9 --------- .../test/cases/adapters/mysql2/schema_migrations_test.rb | 4 ++-- 4 files changed, 16 insertions(+), 11 deletions(-) diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md index 6cdf9ebd9b..b66db6a754 100644 --- a/activerecord/CHANGELOG.md +++ b/activerecord/CHANGELOG.md @@ -1,3 +1,7 @@ +* Add `SchemaMigration.create_table` support any unicode charsets for MySQL. + + *Ryuta Kamizono* + * PostgreSQL, no longer disables user triggers if system triggers can't be disabled. Disabling user triggers does not fulfill what the method promises. Rails currently requires superuser privileges for this method. diff --git a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb index 98009da2bd..c084431588 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb @@ -235,6 +235,16 @@ module ActiveRecord end end + MAX_INDEX_LENGTH_FOR_CHARSETS_OF_4BYTES_MAXLEN = 191 + CHARSETS_OF_4BYTES_MAXLEN = ['utf8mb4', 'utf16', 'utf16le', 'utf32'] + def initialize_schema_migrations_table + if CHARSETS_OF_4BYTES_MAXLEN.include?(charset) + ActiveRecord::SchemaMigration.create_table(MAX_INDEX_LENGTH_FOR_CHARSETS_OF_4BYTES_MAXLEN) + else + ActiveRecord::SchemaMigration.create_table + end + end + # Returns true, since this connection adapter supports migrations. def supports_migrations? true diff --git a/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb b/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb index fac6f81540..21631be25c 100644 --- a/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb @@ -37,15 +37,6 @@ module ActiveRecord configure_connection end - MAX_INDEX_LENGTH_FOR_UTF8MB4 = 191 - def initialize_schema_migrations_table - if charset == 'utf8mb4' - ActiveRecord::SchemaMigration.create_table(MAX_INDEX_LENGTH_FOR_UTF8MB4) - else - ActiveRecord::SchemaMigration.create_table - end - end - def supports_explain? true end diff --git a/activerecord/test/cases/adapters/mysql2/schema_migrations_test.rb b/activerecord/test/cases/adapters/mysql2/schema_migrations_test.rb index 271b570eb5..417ccf6d11 100644 --- a/activerecord/test/cases/adapters/mysql2/schema_migrations_test.rb +++ b/activerecord/test/cases/adapters/mysql2/schema_migrations_test.rb @@ -2,7 +2,7 @@ require "cases/helper" module ActiveRecord module ConnectionAdapters - class Mysql2Adapter + class AbstractMysqlAdapter class SchemaMigrationsTest < ActiveRecord::TestCase def test_renaming_index_on_foreign_key connection.add_index "engines", "car_id" @@ -28,7 +28,7 @@ module ActiveRecord connection.initialize_schema_migrations_table - assert connection.column_exists?(smtn, :version, :string, limit: Mysql2Adapter::MAX_INDEX_LENGTH_FOR_UTF8MB4) + assert connection.column_exists?(smtn, :version, :string, limit: AbstractMysqlAdapter::MAX_INDEX_LENGTH_FOR_CHARSETS_OF_4BYTES_MAXLEN) ensure execute("ALTER DATABASE #{database_name} DEFAULT CHARACTER SET #{original_charset} COLLATE #{original_collation}") end -- cgit v1.2.3