MySQL/Ruby は広く使われていますが、個人的にいくつか問題点を感じています。その問題点を改良し、ついでに機能を強化した補助的な拡張ライブラリを作成しましたので、それを紹介します。またCGIで使える軽量なO/Rマッパーを自作したので、そちらの紹介も行ないます。

1. Ruby 01 LightningTalk
MySQL
O/R
makoto kuwata
http://www.kuwata-lab.com/
copyright(c) 2008 kuwata-lab.com all rights reserved.
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2. 1
MySQL
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3. MySQL/Ruby
‣ MySQL/Ruby
• Ruby MySQL
• :
• Rails
• http://www.tmtm.org/mysql/ruby/
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4. ‣ Mysql::Result#fetch()
•
‣ Mysql::Stmt#fetch()
• 3.14 3.14000010490417
• timestamp Time Mysql::Time
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5. 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
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6. ‣ 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()
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7. ‣ MySQL::Result#fetch_as(klass)
MySQL::Result#fetch_all_as(klass)
• klass
• Hash fetch
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8. 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
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9. 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)
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10. 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)
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11. ‣ integer(1) boolean
true/false
‣ '0000-00-00 00:00:00' Time Date
(ArgumentError)
‣ Ruby on Rails
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12. 2
O/R
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13. Kwery
‣ Kwery … O/R
• CGI
• Model class
• Join-less
• MySQL motto-mysql
• http://github.com/kwatch/kwery/
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14. 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
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15. # 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) }
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16. : 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 (...)
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17. Web !
http://www.github.com/kwatch/kwery/
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18. thank you
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