+++ /dev/null
-require 'active_record/connection_adapters/abstract_adapter'
-require 'set'
-
-module MysqlCompat #:nodoc:
- # add all_hashes method to standard mysql-c bindings or pure ruby version
- def self.define_all_hashes_method!
- raise 'Mysql not loaded' unless defined?(::Mysql)
-
- target = defined?(Mysql::Result) ? Mysql::Result : MysqlRes
- return if target.instance_methods.include?('all_hashes') ||
- target.instance_methods.include?(:all_hashes)
-
- # Ruby driver has a version string and returns null values in each_hash
- # C driver >= 2.7 returns null values in each_hash
- if Mysql.const_defined?(:VERSION) && (Mysql::VERSION.is_a?(String) || Mysql::VERSION >= 20700)
- target.class_eval <<-'end_eval'
- def all_hashes # def all_hashes
- rows = [] # rows = []
- each_hash { |row| rows << row } # each_hash { |row| rows << row }
- rows # rows
- end # end
- end_eval
-
- # adapters before 2.7 don't have a version constant
- # and don't return null values in each_hash
- else
- target.class_eval <<-'end_eval'
- def all_hashes # def all_hashes
- rows = [] # rows = []
- all_fields = fetch_fields.inject({}) { |fields, f| # all_fields = fetch_fields.inject({}) { |fields, f|
- fields[f.name] = nil; fields # fields[f.name] = nil; fields
- } # }
- each_hash { |row| rows << all_fields.dup.update(row) } # each_hash { |row| rows << all_fields.dup.update(row) }
- rows # rows
- end # end
- end_eval
- end
-
- unless target.instance_methods.include?('all_hashes') ||
- target.instance_methods.include?(:all_hashes)
- raise "Failed to defined #{target.name}#all_hashes method. Mysql::VERSION = #{Mysql::VERSION.inspect}"
- end
- end
-end
-
-module ActiveRecord
- class Base
- # Establishes a connection to the database that's used by all Active Record objects.
- def self.mysql_connection(config) # :nodoc:
- config = config.symbolize_keys
- host = config[:host]
- port = config[:port]
- socket = config[:socket]
- username = config[:username] ? config[:username].to_s : 'root'
- password = config[:password].to_s
- database = config[:database]
-
- # Require the MySQL driver and define Mysql::Result.all_hashes
- unless defined? Mysql
- begin
- require_library_or_gem('mysql')
- rescue LoadError
- $stderr.puts '!!! The bundled mysql.rb driver has been removed from Rails 2.2. Please install the mysql gem and try again: gem install mysql.'
- raise
- end
- end
-
- MysqlCompat.define_all_hashes_method!
-
- mysql = Mysql.init
- mysql.ssl_set(config[:sslkey], config[:sslcert], config[:sslca], config[:sslcapath], config[:sslcipher]) if config[:sslca] || config[:sslkey]
-
- default_flags = Mysql.const_defined?(:CLIENT_MULTI_RESULTS) ? Mysql::CLIENT_MULTI_RESULTS : 0
- options = [host, username, password, database, port, socket, default_flags]
- ConnectionAdapters::MysqlAdapter.new(mysql, logger, options, config)
- end
- end
-
- module ConnectionAdapters
- class MysqlColumn < Column #:nodoc:
- def extract_default(default)
- if sql_type =~ /blob/i || type == :text
- if default.blank?
- return null ? nil : ''
- else
- raise ArgumentError, "#{type} columns cannot have a default value: #{default.inspect}"
- end
- elsif missing_default_forged_as_empty_string?(default)
- nil
- else
- super
- end
- end
-
- def has_default?
- return false if sql_type =~ /blob/i || type == :text #mysql forbids defaults on blob and text columns
- super
- end
-
- private
- def simplified_type(field_type)
- return :boolean if MysqlAdapter.emulate_booleans && field_type.downcase.index("tinyint(1)")
- return :string if field_type =~ /enum/i
- super
- end
-
- def extract_limit(sql_type)
- case sql_type
- when /blob|text/i
- case sql_type
- when /tiny/i
- 255
- when /medium/i
- 16777215
- when /long/i
- 2147483647 # mysql only allows 2^31-1, not 2^32-1, somewhat inconsistently with the tiny/medium/normal cases
- else
- super # we could return 65535 here, but we leave it undecorated by default
- end
- when /^bigint/i; 8
- when /^int/i; 4
- when /^mediumint/i; 3
- when /^smallint/i; 2
- when /^tinyint/i; 1
- else
- super
- end
- end
-
- # MySQL misreports NOT NULL column default when none is given.
- # We can't detect this for columns which may have a legitimate ''
- # default (string) but we can for others (integer, datetime, boolean,
- # and the rest).
- #
- # Test whether the column has default '', is not null, and is not
- # a type allowing default ''.
- def missing_default_forged_as_empty_string?(default)
- type != :string && !null && default == ''
- end
- end
-
- # The MySQL adapter will work with both Ruby/MySQL, which is a Ruby-based MySQL adapter that comes bundled with Active Record, and with
- # the faster C-based MySQL/Ruby adapter (available both as a gem and from http://www.tmtm.org/en/mysql/ruby/).
- #
- # Options:
- #
- # * <tt>:host</tt> - Defaults to "localhost".
- # * <tt>:port</tt> - Defaults to 3306.
- # * <tt>:socket</tt> - Defaults to "/tmp/mysql.sock".
- # * <tt>:username</tt> - Defaults to "root"
- # * <tt>:password</tt> - Defaults to nothing.
- # * <tt>:database</tt> - The name of the database. No default, must be provided.
- # * <tt>:encoding</tt> - (Optional) Sets the client encoding by executing "SET NAMES <encoding>" after connection.
- # * <tt>:reconnect</tt> - Defaults to false (See MySQL documentation: http://dev.mysql.com/doc/refman/5.0/en/auto-reconnect.html).
- # * <tt>:sslca</tt> - Necessary to use MySQL with an SSL connection.
- # * <tt>:sslkey</tt> - Necessary to use MySQL with an SSL connection.
- # * <tt>:sslcert</tt> - Necessary to use MySQL with an SSL connection.
- # * <tt>:sslcapath</tt> - Necessary to use MySQL with an SSL connection.
- # * <tt>:sslcipher</tt> - Necessary to use MySQL with an SSL connection.
- #
- class MysqlAdapter < AbstractAdapter
-
- ##
- # :singleton-method:
- # By default, the MysqlAdapter will consider all columns of type <tt>tinyint(1)</tt>
- # as boolean. If you wish to disable this emulation (which was the default
- # behavior in versions 0.13.1 and earlier) you can add the following line
- # to your environment.rb file:
- #
- # ActiveRecord::ConnectionAdapters::MysqlAdapter.emulate_booleans = false
- cattr_accessor :emulate_booleans
- self.emulate_booleans = true
-
- ADAPTER_NAME = 'MySQL'.freeze
-
- LOST_CONNECTION_ERROR_MESSAGES = [
- "Server shutdown in progress",
- "Broken pipe",
- "Lost connection to MySQL server during query",
- "MySQL server has gone away" ]
-
- QUOTED_TRUE, QUOTED_FALSE = '1'.freeze, '0'.freeze
-
- NATIVE_DATABASE_TYPES = {
- :primary_key => "int(11) DEFAULT NULL auto_increment PRIMARY KEY".freeze,
- :string => { :name => "varchar", :limit => 255 },
- :text => { :name => "text" },
- :integer => { :name => "int", :limit => 4 },
- :float => { :name => "float" },
- :decimal => { :name => "decimal" },
- :datetime => { :name => "datetime" },
- :timestamp => { :name => "datetime" },
- :time => { :name => "time" },
- :date => { :name => "date" },
- :binary => { :name => "blob" },
- :boolean => { :name => "tinyint", :limit => 1 }
- }
-
- def initialize(connection, logger, connection_options, config)
- super(connection, logger)
- @connection_options, @config = connection_options, config
- @quoted_column_names, @quoted_table_names = {}, {}
- connect
- end
-
- def adapter_name #:nodoc:
- ADAPTER_NAME
- end
-
- def supports_migrations? #:nodoc:
- true
- end
-
- def supports_primary_key? #:nodoc:
- true
- end
-
- def supports_savepoints? #:nodoc:
- true
- end
-
- def native_database_types #:nodoc:
- NATIVE_DATABASE_TYPES
- end
-
-
- # QUOTING ==================================================
-
- def quote(value, column = nil)
- if value.kind_of?(String) && column && column.type == :binary && column.class.respond_to?(:string_to_binary)
- s = column.class.string_to_binary(value).unpack("H*")[0]
- "x'#{s}'"
- elsif value.kind_of?(BigDecimal)
- value.to_s("F")
- else
- super
- end
- end
-
- def quote_column_name(name) #:nodoc:
- @quoted_column_names[name] ||= "`#{name}`"
- end
-
- def quote_table_name(name) #:nodoc:
- @quoted_table_names[name] ||= quote_column_name(name).gsub('.', '`.`')
- end
-
- def quote_string(string) #:nodoc:
- @connection.quote(string)
- end
-
- def quoted_true
- QUOTED_TRUE
- end
-
- def quoted_false
- QUOTED_FALSE
- end
-
- # REFERENTIAL INTEGRITY ====================================
-
- def disable_referential_integrity(&block) #:nodoc:
- old = select_value("SELECT @@FOREIGN_KEY_CHECKS")
-
- begin
- update("SET FOREIGN_KEY_CHECKS = 0")
- yield
- ensure
- update("SET FOREIGN_KEY_CHECKS = #{old}")
- end
- end
-
- # CONNECTION MANAGEMENT ====================================
-
- def active?
- if @connection.respond_to?(:stat)
- @connection.stat
- else
- @connection.query 'select 1'
- end
-
- # mysql-ruby doesn't raise an exception when stat fails.
- if @connection.respond_to?(:errno)
- @connection.errno.zero?
- else
- true
- end
- rescue Mysql::Error
- false
- end
-
- def reconnect!
- disconnect!
- connect
- end
-
- def disconnect!
- @connection.close rescue nil
- end
-
- def reset!
- if @connection.respond_to?(:change_user)
- # See http://bugs.mysql.com/bug.php?id=33540 -- the workaround way to
- # reset the connection is to change the user to the same user.
- @connection.change_user(@config[:username], @config[:password], @config[:database])
- configure_connection
- end
- end
-
- # DATABASE STATEMENTS ======================================
-
- def select_rows(sql, name = nil)
- @connection.query_with_result = true
- result = execute(sql, name)
- rows = []
- result.each { |row| rows << row }
- result.free
- rows
- end
-
- # Executes a SQL query and returns a MySQL::Result object. Note that you have to free the Result object after you're done using it.
- def execute(sql, name = nil) #:nodoc:
- log(sql, name) { @connection.query(sql) }
- rescue ActiveRecord::StatementInvalid => exception
- if exception.message.split(":").first =~ /Packets out of order/
- raise ActiveRecord::StatementInvalid, "'Packets out of order' error was received from the database. Please update your mysql bindings (gem install mysql) and read http://dev.mysql.com/doc/mysql/en/password-hashing.html for more information. If you're on Windows, use the Instant Rails installer to get the updated mysql bindings."
- else
- raise
- end
- end
-
- def insert_sql(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil) #:nodoc:
- super sql, name
- id_value || @connection.insert_id
- end
-
- def update_sql(sql, name = nil) #:nodoc:
- super
- @connection.affected_rows
- end
-
- def begin_db_transaction #:nodoc:
- execute "BEGIN"
- rescue Exception
- # Transactions aren't supported
- end
-
- def commit_db_transaction #:nodoc:
- execute "COMMIT"
- rescue Exception
- # Transactions aren't supported
- end
-
- def rollback_db_transaction #:nodoc:
- execute "ROLLBACK"
- rescue Exception
- # Transactions aren't supported
- end
-
- def create_savepoint
- execute("SAVEPOINT #{current_savepoint_name}")
- end
-
- def rollback_to_savepoint
- execute("ROLLBACK TO SAVEPOINT #{current_savepoint_name}")
- end
-
- def release_savepoint
- execute("RELEASE SAVEPOINT #{current_savepoint_name}")
- end
-
- def add_limit_offset!(sql, options) #:nodoc:
- if limit = options[:limit]
- limit = sanitize_limit(limit)
- unless offset = options[:offset]
- sql << " LIMIT #{limit}"
- else
- sql << " LIMIT #{offset.to_i}, #{limit}"
- end
- end
- end
-
-
- # SCHEMA STATEMENTS ========================================
-
- def structure_dump #:nodoc:
- if supports_views?
- sql = "SHOW FULL TABLES WHERE Table_type = 'BASE TABLE'"
- else
- sql = "SHOW TABLES"
- end
-
- select_all(sql).inject("") do |structure, table|
- table.delete('Table_type')
- structure += select_one("SHOW CREATE TABLE #{quote_table_name(table.to_a.first.last)}")["Create Table"] + ";\n\n"
- end
- end
-
- def recreate_database(name, options = {}) #:nodoc:
- drop_database(name)
- create_database(name, options)
- end
-
- # Create a new MySQL database with optional <tt>:charset</tt> and <tt>:collation</tt>.
- # Charset defaults to utf8.
- #
- # Example:
- # create_database 'charset_test', :charset => 'latin1', :collation => 'latin1_bin'
- # create_database 'matt_development'
- # create_database 'matt_development', :charset => :big5
- def create_database(name, options = {})
- if options[:collation]
- execute "CREATE DATABASE `#{name}` DEFAULT CHARACTER SET `#{options[:charset] || 'utf8'}` COLLATE `#{options[:collation]}`"
- else
- execute "CREATE DATABASE `#{name}` DEFAULT CHARACTER SET `#{options[:charset] || 'utf8'}`"
- end
- end
-
- def drop_database(name) #:nodoc:
- execute "DROP DATABASE IF EXISTS `#{name}`"
- end
-
- def current_database
- select_value 'SELECT DATABASE() as db'
- end
-
- # Returns the database character set.
- def charset
- show_variable 'character_set_database'
- end
-
- # Returns the database collation strategy.
- def collation
- show_variable 'collation_database'
- end
-
- def tables(name = nil) #:nodoc:
- tables = []
- result = execute("SHOW TABLES", name)
- result.each { |field| tables << field[0] }
- result.free
- tables
- end
-
- def drop_table(table_name, options = {})
- super(table_name, options)
- end
-
- def indexes(table_name, name = nil)#:nodoc:
- indexes = []
- current_index = nil
- result = execute("SHOW KEYS FROM #{quote_table_name(table_name)}", name)
- result.each do |row|
- if current_index != row[2]
- next if row[2] == "PRIMARY" # skip the primary key
- current_index = row[2]
- indexes << IndexDefinition.new(row[0], row[2], row[1] == "0", [])
- end
-
- indexes.last.columns << row[4]
- end
- result.free
- indexes
- end
-
- def columns(table_name, name = nil)#:nodoc:
- sql = "SHOW FIELDS FROM #{quote_table_name(table_name)}"
- columns = []
- result = execute(sql, name)
- result.each { |field| columns << MysqlColumn.new(field[0], field[4], field[1], field[2] == "YES") }
- result.free
- columns
- end
-
- def create_table(table_name, options = {}) #:nodoc:
- super(table_name, options.reverse_merge(:options => "ENGINE=InnoDB"))
- end
-
- def rename_table(table_name, new_name)
- execute "RENAME TABLE #{quote_table_name(table_name)} TO #{quote_table_name(new_name)}"
- end
-
- 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
-
- def change_column_null(table_name, column_name, null, default = nil)
- column = column_for(table_name, column_name)
-
- unless null || default.nil?
- execute("UPDATE #{quote_table_name(table_name)} SET #{quote_column_name(column_name)}=#{quote(default)} WHERE #{quote_column_name(column_name)} IS NULL")
- end
-
- change_column table_name, column_name, column.sql_type, :null => null
- end
-
- def change_column(table_name, column_name, type, options = {}) #:nodoc:
- column = column_for(table_name, column_name)
-
- unless options_include_default?(options)
- options[:default] = column.default
- end
-
- unless options.has_key?(:null)
- options[:null] = column.null
- end
-
- change_column_sql = "ALTER TABLE #{quote_table_name(table_name)} CHANGE #{quote_column_name(column_name)} #{quote_column_name(column_name)} #{type_to_sql(type, options[:limit], options[:precision], options[:scale])}"
- add_column_options!(change_column_sql, options)
- execute(change_column_sql)
- end
-
- def rename_column(table_name, column_name, new_column_name) #:nodoc:
- options = {}
- if column = columns(table_name).find { |c| c.name == column_name.to_s }
- options[:default] = column.default
- options[:null] = column.null
- else
- raise ActiveRecordError, "No such column: #{table_name}.#{column_name}"
- end
- current_type = select_one("SHOW COLUMNS FROM #{quote_table_name(table_name)} LIKE '#{column_name}'")["Type"]
- rename_column_sql = "ALTER TABLE #{quote_table_name(table_name)} CHANGE #{quote_column_name(column_name)} #{quote_column_name(new_column_name)} #{current_type}"
- add_column_options!(rename_column_sql, options)
- execute(rename_column_sql)
- end
-
- # Maps logical Rails types to MySQL-specific data types.
- def type_to_sql(type, limit = nil, precision = nil, scale = nil)
- return super unless type.to_s == 'integer'
-
- case limit
- when 1; 'tinyint'
- when 2; 'smallint'
- when 3; 'mediumint'
- when nil, 4, 11; 'int(11)' # compatibility with MySQL default
- when 5..8; 'bigint'
- else raise(ActiveRecordError, "No integer type has byte size #{limit}")
- end
- end
-
-
- # SHOW VARIABLES LIKE 'name'
- def show_variable(name)
- variables = select_all("SHOW VARIABLES LIKE '#{name}'")
- variables.first['Value'] unless variables.empty?
- end
-
- # Returns a table's primary key and belonging sequence.
- def pk_and_sequence_for(table) #:nodoc:
- keys = []
- result = execute("describe #{quote_table_name(table)}")
- result.each_hash do |h|
- keys << h["Field"]if h["Key"] == "PRI"
- end
- result.free
- keys.length == 1 ? [keys.first, nil] : nil
- end
-
- # Returns just a table's primary key
- def primary_key(table)
- pk_and_sequence = pk_and_sequence_for(table)
- pk_and_sequence && pk_and_sequence.first
- end
-
- def case_sensitive_equality_operator
- "= BINARY"
- end
-
- def limited_update_conditions(where_sql, quoted_table_name, quoted_primary_key)
- where_sql
- end
-
- private
- def connect
- encoding = @config[:encoding]
- if encoding
- @connection.options(Mysql::SET_CHARSET_NAME, encoding) rescue nil
- end
-
- if @config[:sslca] || @config[:sslkey]
- @connection.ssl_set(@config[:sslkey], @config[:sslcert], @config[:sslca], @config[:sslcapath], @config[:sslcipher])
- end
-
- @connection.options(Mysql::OPT_CONNECT_TIMEOUT, @config[:connect_timeout]) if @config[:connect_timeout]
- @connection.options(Mysql::OPT_READ_TIMEOUT, @config[:read_timeout]) if @config[:read_timeout]
- @connection.options(Mysql::OPT_WRITE_TIMEOUT, @config[:write_timeout]) if @config[:write_timeout]
-
- @connection.real_connect(*@connection_options)
-
- # reconnect must be set after real_connect is called, because real_connect sets it to false internally
- @connection.reconnect = !!@config[:reconnect] if @connection.respond_to?(:reconnect=)
-
- configure_connection
- end
-
- def configure_connection
- encoding = @config[:encoding]
- execute("SET NAMES '#{encoding}'") if encoding
-
- # By default, MySQL 'where id is null' selects the last inserted id.
- # Turn this off. http://dev.rubyonrails.org/ticket/6778
- execute("SET SQL_AUTO_IS_NULL=0")
- end
-
- def select(sql, name = nil)
- @connection.query_with_result = true
- result = execute(sql, name)
- rows = result.all_hashes
- result.free
- rows
- end
-
- def supports_views?
- version[0] >= 5
- end
-
- def version
- @version ||= @connection.server_info.scan(/^(\d+)\.(\d+)\.(\d+)/).flatten.map { |v| v.to_i }
- end
-
- def column_for(table_name, column_name)
- unless column = columns(table_name).find { |c| c.name == column_name.to_s }
- raise "No such column: #{table_name}.#{column_name}"
- end
- column
- end
- end
- end
-end
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