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remove Sequel adapter as it's now in Sequel core :)

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Brian Lopez 2010-08-06 12:47:25 -07:00
parent b448b98146
commit 7bf9889103
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lib/sequel/adapters/mysql2.rb
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require 'mysql2' unless defined? Mysql2
Sequel.require %w'shared/mysql', 'adapters'
module Sequel
# Module for holding all Mysql2-related classes and modules for Sequel.
module Mysql2
class << self
# Set the default charset used for CREATE TABLE. You can pass the
# :charset option to create_table to override this setting.
attr_accessor :default_charset
# Set the default collation used for CREATE TABLE. You can pass the
# :collate option to create_table to override this setting.
attr_accessor :default_collate
# Set the default engine used for CREATE TABLE. You can pass the
# :engine option to create_table to override this setting.
attr_accessor :default_engine
end
@convert_tinyint_to_bool = true
class << self
# Sequel converts the column type tinyint(1) to a boolean by default when
# using the native Mysql2 adapter. You can turn off the conversion by setting
# this to false.
attr_accessor :convert_tinyint_to_bool
end
# Database class for MySQL databases used with Sequel.
class Database < Sequel::Database
include Sequel::MySQL::DatabaseMethods
# Mysql::Error messages that indicate the current connection should be disconnected
MYSQL_DATABASE_DISCONNECT_ERRORS = /\A(Commands out of sync; you can't run this command now|Can't connect to local MySQL server through socket|MySQL server has gone away)/
set_adapter_scheme :mysql2
# Connect to the database. In addition to the usual database options,
# the following options have effect:
#
# * :auto_is_null - Set to true to use MySQL default behavior of having
# a filter for an autoincrement column equals NULL to return the last
# inserted row.
# * :charset - Same as :encoding (:encoding takes precendence)
# * :compress - Set to false to not compress results from the server
# * :config_default_group - The default group to read from the in
# the MySQL config file.
# * :config_local_infile - If provided, sets the Mysql::OPT_LOCAL_INFILE
# option on the connection with the given value.
# * :encoding - Set all the related character sets for this
# connection (connection, client, database, server, and results).
# * :socket - Use a unix socket file instead of connecting via TCP/IP.
# * :timeout - Set the timeout in seconds before the server will
# disconnect this connection.
def connect(server)
opts = server_opts(server)
opts[:host] ||= 'localhost'
opts[:username] ||= opts[:user]
conn = ::Mysql2::Client.new(opts)
sqls = []
# Set encoding a slightly different way after connecting,
# in case the READ_DEFAULT_GROUP overrode the provided encoding.
# Doesn't work across implicit reconnects, but Sequel doesn't turn on
# that feature.
if encoding = opts[:encoding] || opts[:charset]
sqls << "SET NAMES #{conn.escape(encoding.to_s)}"
end
# increase timeout so mysql server doesn't disconnect us
sqls << "SET @@wait_timeout = #{opts[:timeout] || 2592000}"
# By default, MySQL 'where id is null' selects the last inserted id
sqls << "SET SQL_AUTO_IS_NULL=0" unless opts[:auto_is_null]
sqls.each{|sql| log_yield(sql){conn.query(sql)}}
conn
end
# Returns instance of Sequel::MySQL::Dataset with the given options.
def dataset(opts = nil)
Mysql2::Dataset.new(self, opts)
end
# Executes the given SQL using an available connection, yielding the
# connection if the block is given.
def execute(sql, opts={}, &block)
if opts[:sproc]
call_sproc(sql, opts, &block)
else
synchronize(opts[:server]){|conn| _execute(conn, sql, opts, &block)}
end
end
# Return the version of the MySQL server two which we are connecting.
def server_version(server=nil)
@server_version ||= (synchronize(server){|conn| conn.server_info[:id]} || super)
end
private
# Use MySQL specific syntax for engine type and character encoding
def create_table_sql(name, generator, options = {})
engine = options.fetch(:engine, Sequel::Mysql2.default_engine)
charset = options.fetch(:charset, Sequel::Mysql2.default_charset)
collate = options.fetch(:collate, Sequel::Mysql2.default_collate)
generator.columns.each do |c|
if t = c.delete(:table)
generator.foreign_key([c[:name]], t, c.merge(:name=>nil, :type=>:foreign_key))
end
end
super(name, generator, options.merge(:engine => engine, :charset => charset, :collate => collate))
end
# Execute the given SQL on the given connection. If the :type
# option is :select, yield the result of the query, otherwise
# yield the connection if a block is given.
def _execute(conn, sql, opts)
query_opts = {:symbolize_keys => true}
query_opts.merge!(:database_timezone => Sequel.database_timezone) if Sequel.respond_to?(:database_timezone)
query_opts.merge!(:application_timezone => Sequel.application_timezone) if Sequel.respond_to?(:application_timezone)
begin
r = log_yield(sql){conn.query(sql, query_opts)}
if opts[:type] == :select
yield r if r
elsif block_given?
yield conn
end
rescue ::Mysql2::Error => e
raise_error(e, :disconnect=>MYSQL_DATABASE_DISCONNECT_ERRORS.match(e.message))
end
end
# MySQL connections use the query method to execute SQL without a result
def connection_execute_method
:query
end
# The MySQL adapter main error class is Mysql2::Error
def database_error_classes
[::Mysql2::Error]
end
# The database name when using the native adapter is always stored in
# the :database option.
def database_name
@opts[:database]
end
# Closes given database connection.
def disconnect_connection(c)
c.close
end
# Convert tinyint(1) type to boolean if convert_tinyint_to_bool is true
def schema_column_type(db_type)
Sequel::Mysql2.convert_tinyint_to_bool && db_type == 'tinyint(1)' ? :boolean : super
end
end
# Dataset class for MySQL datasets accessed via the native driver.
class Dataset < Sequel::Dataset
include Sequel::MySQL::DatasetMethods
# Delete rows matching this dataset
def delete
execute_dui(delete_sql){|c| return c.affected_rows}
end
# Yield all rows matching this dataset.
def fetch_rows(sql, &block)
execute(sql) do |r|
@columns = r.fields
r.each(:cast_booleans => Sequel::Mysql2.convert_tinyint_to_bool, &block)
end
self
end
# Don't allow graphing a dataset that splits multiple statements
def graph(*)
raise(Error, "Can't graph a dataset that splits multiple result sets") if opts[:split_multiple_result_sets]
super
end
# Insert a new value into this dataset
def insert(*values)
execute_dui(insert_sql(*values)){|c| return c.last_id}
end
# Replace (update or insert) the matching row.
def replace(*args)
execute_dui(replace_sql(*args)){|c| return c.last_id}
end
# Update the matching rows.
def update(values={})
execute_dui(update_sql(values)){|c| return c.affected_rows}
end
private
# Set the :type option to :select if it hasn't been set.
def execute(sql, opts={}, &block)
super(sql, {:type=>:select}.merge(opts), &block)
end
# Set the :type option to :dui if it hasn't been set.
def execute_dui(sql, opts={}, &block)
super(sql, {:type=>:dui}.merge(opts), &block)
end
# Handle correct quoting of strings using ::Mysql2::Client#escape.
def literal_string(v)
db.synchronize{|c| "'#{c.escape(v)}'"}
end
end
end
end