MySQLドライバの改良と軽量O/Rマッパーの紹介

motto-mysql ‣ motto-mysql • MySQL/Ruby • http://motto-mysql.rubyforge.org/ http://github.com/kwatch/motto-mysql • : $ which mysql_conﬁg /usr/local/mysql/bin/mysql_conﬁg $ sudo gem install motto-mysql copyright(c) 2008 kuwata-lab.com all rights reserved. 5

‣ Mysql::Result fetch • #fetch_as_hash()/array() • #fetch_all_as_hashes()/arrays() ‣ Mysql::Stmt 3.14 3.14 timestamp Time • #fetch_as_hash()/array() • #fetch_all_as_hashes()/arrays() copyright(c) 2008 kuwata-lab.com all rights reserved. 6

require 'mysql' require 'motto_mysql' conn = Mysql.connect('host', 'user', 'pass', 'db') sql = 'select * from users' result = conn.query(sql) p result.fetch_as(User) #=> User object result.fetch_all_as(User) do |user| p user #=> User object end copyright(c) 2008 kuwata-lab.com all rights reserved. 8

DB systime usertime Result#each ( ) 4.79 1.08 3.83 Result#each ( ) 4.84 1.08 5.12 Hash fetch + Result#each ( +new) 4.86 1.09 6.99 + Result#each_hash ( ) 4.80 1.08 5.30 Object.new Result#each_hash ( ) 4.87 1.09 7.66 Resutl#each_hash ( +new) 4.90 1.11 10.45 Result#fetch_all_as_arrays() 4.76 1.07 3.57 Result#fetch_all_as_hashes() 4.82 1.08 5.00 , usertime Result#fetch_all_as(klass) 4.80 1.08 4.74 1/2, 2/3 0 5 10 15 20 (sec) copyright(c) 2008 kuwata-lab.com all rights reserved. 9

DB systime usertime Result#each ( +new) 4.86 1.09 6.99 Resutl#each_hash ( +new) 4.90 1.11 10.45 Result#fetch_all_as(klass) 4.80 1.08 4.74 DB fetch Java Java1.5+MySQL Connector5.1.5 5.34 0.80 6.28 Python2.5.2+MySQLdb(dict) 4.87 1.28 9.05 Python2.5.2+MySQLdb(tuple) 4.81 1.27 5.97 0 5 10 15 20 (sec) copyright(c) 2008 kuwata-lab.com all rights reserved. 10

class User include Kwery::Model create table DSL create_table('users') do |t| t.integer(:id) {|c| c.primary_key.serial } t.string(:name) {|c| c.not_null.unique } t.timestamp(:created_at) {|c| c.default(:current_timestamp) } end end # User.to_sql SQL copyright(c) 2008 kuwata-lab.com all rights reserved. 14

# Query conn = Mysql.connect('host', 'user', 'pass', 'db') q = Kwery::Query.new(conn) # # Hash user = q.get(User, :id, 7) # where order_by method chain users = q.get_all(User) {|c| c.where('age >', 20).order_by(:name) } copyright(c) 2008 kuwata-lab.com all rights reserved. 15

: Join ‣ Join-less programming ( : ) • select * from users, groups where user.group_id = groups.id; select * from users; select * from groups where id in (...); • 1+N 2 users = q.get_all(User) #=> select * from users q.bind_references_to(users, Group, 'team_id', 'team') #=> select * from groups where id in (...) copyright(c) 2008 kuwata-lab.com all rights reserved. 16

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MySQLドライバの改良と軽量O/Rマッパーの紹介

by kwatch on Oct 25, 2008

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MySQLドライバの改良と軽量O/Rマッパーの紹介 — Presentation Transcript