diff options
Diffstat (limited to 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb')
| -rw-r--r-- | activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb | 225 |
1 files changed, 168 insertions, 57 deletions
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 200b773172..d083e413a5 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb @@ -1,10 +1,18 @@ require 'arel/visitors/bind_visitor' +require 'active_support/core_ext/string/strip' module ActiveRecord module ConnectionAdapters class AbstractMysqlAdapter < AbstractAdapter include Savepoints + class TableDefinition < ActiveRecord::ConnectionAdapters::TableDefinition + def primary_key(name, type = :primary_key, options = {}) + options[:auto_increment] ||= type == :bigint + super + end + end + class SchemaCreation < AbstractAdapter::SchemaCreation def visit_AddColumn(o) add_column_position!(super, column_options(o)) @@ -12,6 +20,10 @@ module ActiveRecord private + def visit_DropForeignKey(name) + "DROP FOREIGN KEY #{name}" + end + def visit_TableDefinition(o) name = o.name create_sql = "CREATE#{' TEMPORARY' if o.temporary} TABLE #{quote_table_name(name)} " @@ -62,20 +74,19 @@ module ActiveRecord @extra = extra super(name, default, cast_type, sql_type, null) assert_valid_default(default) + extract_default end - def default - @default ||= if blob_or_text_column? - null || strict ? nil : '' - elsif missing_default_forged_as_empty_string?(@original_default) - nil - else - super + def extract_default + if blob_or_text_column? + @default = null || strict ? nil : '' + elsif missing_default_forged_as_empty_string?(@default) + @default = nil end end def has_default? - return false if blob_or_text_column? #mysql forbids defaults on blob and text columns + return false if blob_or_text_column? # MySQL forbids defaults on blob and text columns super end @@ -87,6 +98,13 @@ module ActiveRecord collation && !collation.match(/_ci$/) end + def ==(other) + super && + collation == other.collation && + strict == other.strict && + extra == other.extra + end + private # MySQL misreports NOT NULL column default when none is given. @@ -105,6 +123,10 @@ module ActiveRecord raise ArgumentError, "#{type} columns cannot have a default value: #{default.inspect}" end end + + def attributes_for_hash + super + [collation, strict, extra] + end end ## @@ -158,10 +180,6 @@ module ActiveRecord end end - def adapter_name #:nodoc: - self.class::ADAPTER_NAME - end - # Returns true, since this connection adapter supports migrations. def supports_migrations? true @@ -193,6 +211,14 @@ module ActiveRecord true end + def supports_foreign_keys? + true + end + + def supports_views? + version[0] >= 5 + end + def native_database_types NATIVE_DATABASE_TYPES end @@ -213,7 +239,7 @@ module ActiveRecord Column.new(field, default, cast_type, sql_type, null, collation, strict_mode?, extra) end - # Must return the Mysql error number from the exception, if the exception has an + # Must return the MySQL error number from the exception, if the exception has an # error number. def error_number(exception) # :nodoc: raise NotImplementedError @@ -266,7 +292,9 @@ module ActiveRecord end end + #-- # DATABASE STATEMENTS ====================================== + #++ def clear_cache! super @@ -377,12 +405,16 @@ module ActiveRecord sql << "LIKE #{quote(like)}" if like execute_and_free(sql, 'SCHEMA') do |result| - result.collect { |field| field.first } + result.collect(&:first) end end + def truncate(table_name, name = nil) + execute "TRUNCATE TABLE #{quote_table_name(table_name)}", name + end + def table_exists?(name) - return false unless name + return false unless name.present? return true if tables(nil, nil, name).any? name = name.to_s @@ -462,18 +494,20 @@ module ActiveRecord end def drop_table(table_name, options = {}) - execute "DROP#{' TEMPORARY' if options[:temporary]} TABLE #{quote_table_name(table_name)}" + execute "DROP#{' TEMPORARY' if options[:temporary]} TABLE #{quote_table_name(table_name)}#{' CASCADE' if options[:force] == :cascade}" end def rename_index(table_name, old_name, new_name) - if (version[0] == 5 && version[1] >= 7) || version[0] >= 6 + if supports_rename_index? + validate_index_length!(table_name, new_name) + execute "ALTER TABLE #{quote_table_name(table_name)} RENAME INDEX #{quote_table_name(old_name)} TO #{quote_table_name(new_name)}" else super end end - def change_column_default(table_name, column_name, default) + def change_column_default(table_name, column_name, default) #:nodoc: column = column_for(table_name, column_name) change_column table_name, column_name, column.sql_type, :default => default end @@ -502,6 +536,34 @@ module ActiveRecord execute "CREATE #{index_type} INDEX #{quote_column_name(index_name)} #{index_using} ON #{quote_table_name(table_name)} (#{index_columns})#{index_options} #{index_algorithm}" end + def foreign_keys(table_name) + fk_info = select_all <<-SQL.strip_heredoc + SELECT fk.referenced_table_name as 'to_table' + ,fk.referenced_column_name as 'primary_key' + ,fk.column_name as 'column' + ,fk.constraint_name as 'name' + FROM information_schema.key_column_usage fk + WHERE fk.referenced_column_name is not null + AND fk.table_schema = '#{@config[:database]}' + AND fk.table_name = '#{table_name}' + SQL + + create_table_info = select_one("SHOW CREATE TABLE #{quote_table_name(table_name)}")["Create Table"] + + fk_info.map do |row| + options = { + column: row['column'], + name: row['name'], + primary_key: row['primary_key'] + } + + options[:on_update] = extract_foreign_key_action(create_table_info, row['name'], "UPDATE") + options[:on_delete] = extract_foreign_key_action(create_table_info, row['name'], "DELETE") + + ForeignKeyDefinition.new(table_name, row['to_table'], options) + end + end + # Maps logical Rails types to MySQL-specific data types. def type_to_sql(type, limit = nil, precision = nil, scale = nil) case type.to_s @@ -534,14 +596,6 @@ module ActiveRecord end end - def add_column_position!(sql, options) - if options[:first] - sql << " FIRST" - elsif options[:after] - sql << " AFTER #{quote_column_name(options[:after])}" - end - end - # SHOW VARIABLES LIKE 'name' def show_variable(name) variables = select_all("SHOW VARIABLES LIKE '#{name}'", 'SCHEMA') @@ -588,10 +642,6 @@ module ActiveRecord end end - def limited_update_conditions(where_sql, quoted_table_name, quoted_primary_key) - where_sql - end - def strict_mode? self.class.type_cast_config_to_boolean(@config.fetch(:strict, true)) end @@ -604,30 +654,46 @@ module ActiveRecord def initialize_type_map(m) # :nodoc: super - m.register_type(%r(enum)i) do |sql_type| - limit = sql_type[/^enum\((.+)\)/i, 1] - .split(',').map{|enum| enum.strip.length - 2}.max - Type::String.new(limit: limit) - end - - m.register_type %r(tinytext)i, Type::Text.new(limit: 255) - m.register_type %r(tinyblob)i, Type::Binary.new(limit: 255) - m.register_type %r(mediumtext)i, Type::Text.new(limit: 16777215) - m.register_type %r(mediumblob)i, Type::Binary.new(limit: 16777215) - m.register_type %r(longtext)i, Type::Text.new(limit: 2147483647) - m.register_type %r(longblob)i, Type::Binary.new(limit: 2147483647) - m.register_type %r(^bigint)i, Type::Integer.new(limit: 8) - m.register_type %r(^int)i, Type::Integer.new(limit: 4) - m.register_type %r(^mediumint)i, Type::Integer.new(limit: 3) - m.register_type %r(^smallint)i, Type::Integer.new(limit: 2) - m.register_type %r(^tinyint)i, Type::Integer.new(limit: 1) + + register_class_with_limit m, %r(char)i, MysqlString + + m.register_type %r(tinytext)i, Type::Text.new(limit: 2**8 - 1) + m.register_type %r(tinyblob)i, Type::Binary.new(limit: 2**8 - 1) + m.register_type %r(text)i, Type::Text.new(limit: 2**16 - 1) + m.register_type %r(blob)i, Type::Binary.new(limit: 2**16 - 1) + m.register_type %r(mediumtext)i, Type::Text.new(limit: 2**24 - 1) + m.register_type %r(mediumblob)i, Type::Binary.new(limit: 2**24 - 1) + m.register_type %r(longtext)i, Type::Text.new(limit: 2**32 - 1) + m.register_type %r(longblob)i, Type::Binary.new(limit: 2**32 - 1) m.register_type %r(^float)i, Type::Float.new(limit: 24) m.register_type %r(^double)i, Type::Float.new(limit: 53) + register_integer_type m, %r(^bigint)i, limit: 8 + register_integer_type m, %r(^int)i, limit: 4 + register_integer_type m, %r(^mediumint)i, limit: 3 + register_integer_type m, %r(^smallint)i, limit: 2 + register_integer_type m, %r(^tinyint)i, limit: 1 + m.alias_type %r(tinyint\(1\))i, 'boolean' if emulate_booleans m.alias_type %r(set)i, 'varchar' m.alias_type %r(year)i, 'integer' m.alias_type %r(bit)i, 'binary' + + m.register_type(%r(enum)i) do |sql_type| + limit = sql_type[/^enum\((.+)\)/i, 1] + .split(',').map{|enum| enum.strip.length - 2}.max + MysqlString.new(limit: limit) + end + end + + def register_integer_type(mapping, key, options) # :nodoc: + mapping.register_type(key) do |sql_type| + if /unsigned/i =~ sql_type + Type::UnsignedInteger.new(options) + else + Type::Integer.new(options) + end + end end # MySQL is too stupid to create a temporary table for use subquery, so we have @@ -729,18 +795,26 @@ module ActiveRecord "DROP INDEX #{index_name}" end - def add_timestamps_sql(table_name) - [add_column_sql(table_name, :created_at, :datetime), add_column_sql(table_name, :updated_at, :datetime)] + def add_timestamps_sql(table_name, options = {}) + [add_column_sql(table_name, :created_at, :datetime, options), add_column_sql(table_name, :updated_at, :datetime, options)] end - def remove_timestamps_sql(table_name) + def remove_timestamps_sql(table_name, options = {}) [remove_column_sql(table_name, :updated_at), remove_column_sql(table_name, :created_at)] end private - def supports_views? - version[0] >= 5 + def version + @version ||= full_version.scan(/^(\d+)\.(\d+)\.(\d+)/).flatten.map(&:to_i) + end + + def mariadb? + full_version =~ /mariadb/i + end + + def supports_rename_index? + mariadb? ? false : (version[0] == 5 && version[1] >= 7) || version[0] >= 6 end def configure_connection @@ -758,21 +832,25 @@ module ActiveRecord # Make MySQL reject illegal values rather than truncating or blanking them, see # http://dev.mysql.com/doc/refman/5.0/en/server-sql-mode.html#sqlmode_strict_all_tables # If the user has provided another value for sql_mode, don't replace it. - if strict_mode? && !variables.has_key?('sql_mode') - variables['sql_mode'] = 'STRICT_ALL_TABLES' + unless variables.has_key?('sql_mode') + variables['sql_mode'] = strict_mode? ? 'STRICT_ALL_TABLES' : '' end # NAMES does not have an equals sign, see # http://dev.mysql.com/doc/refman/5.0/en/set-statement.html#id944430 # (trailing comma because variable_assignments will always have content) - encoding = "NAMES #{@config[:encoding]}, " if @config[:encoding] + if @config[:encoding] + encoding = "NAMES #{@config[:encoding]}" + encoding << " COLLATE #{@config[:collation]}" if @config[:collation] + encoding << ", " + end # Gather up all of the SET variables... variable_assignments = variables.map do |k, v| if v == ':default' || v == :default - "@@SESSION.#{k.to_s} = DEFAULT" # Sets the value to the global or compile default + "@@SESSION.#{k} = DEFAULT" # Sets the value to the global or compile default elsif !v.nil? - "@@SESSION.#{k.to_s} = #{quote(v)}" + "@@SESSION.#{k} = #{quote(v)}" end # or else nil; compact to clear nils out end.compact.join(', ') @@ -780,6 +858,39 @@ module ActiveRecord # ...and send them all in one query @connection.query "SET #{encoding} #{variable_assignments}" end + + def extract_foreign_key_action(structure, name, action) # :nodoc: + if structure =~ /CONSTRAINT #{quote_column_name(name)} FOREIGN KEY .* REFERENCES .* ON #{action} (CASCADE|SET NULL|RESTRICT)/ + case $1 + when 'CASCADE'; :cascade + when 'SET NULL'; :nullify + end + end + end + + def create_table_definition(name, temporary, options, as = nil) # :nodoc: + TableDefinition.new(native_database_types, name, temporary, options, as) + end + + class MysqlString < Type::String # :nodoc: + def type_cast_for_database(value) + case value + when true then "1" + when false then "0" + else super + end + end + + private + + def cast_value(value) + case value + when true then "1" + when false then "0" + else super + end + end + end end end end |