1. +
Ruby on Rails
Oracle adaptera izstrāde

2. Raimonds Simanovskis
TietoEnator Alise

3. Kas ir
Ruby
on
Rails?

4. Ruby ir
objektorientēta
dinamiska
programmēšanas valoda
vienkārša pēc izskata
spēcīgas iespējas

5. Ruby on Rails
Moderns “tīmekļa lietojumu ietvars”
Veidots Ruby programmēšanas valodā
Radies no 37signals Basecamp aplikācijas
Atvērtā koda programmatūra
Fokusējas uz izstrādātāju produktivitāti
Spējā (Agile) programmatūras izstrādes pieeja

6. Pamatprincipi
Neatkārto sevi
DRY - Don’t Repeat Yourself
Vienošanās nevis konfigurēšana
Convention over Configuration
Programmatūra ar viedokli
Opinionated software

7. Komponentes

8. Active Record (Model)

9. Action Controller

10. Action View

11. Ruby platformas
MRI 1.8.6
Ruby/YARV
JRuby
1.9.1
Rubinius IronRuby MacRuby
MagLev BlueRuby

12. Ruby => Oracle
require 'oci8'
Ruby application OCI8.new('scott', 'tiger').exec(
'select * from emp') do |r|
puts r.join(',')
end
ruby-oci8
Oracle Instant
Oracle Database
Client
SQL*Net

13. JRuby => Oracle
require quot;javaquot;
sql =
Ruby application JavaSQL::DriverManager.getConnec
tion(db, user, password)
statement = sql.createStatement
status = statement.execute
quot;select * from parts;quot;
JRuby rs = statement.getResultSet()
JDBC driver Oracle Database
SQL*Net

14. ActiveRecord
Oracle Enhanced
Adapter

15. Ruby on Rails
=> Oracle
gem install activerecord-oracle_enhanced-adapter
database.yml
development:
adapter: oracle_enhanced
database: XE
username: blogdemo
password: blogdemo
encoding: utf8

16. SQL bind variables
Employee.find(1)
database.yml
development: ActiveRecord
adapter: oracle_enhanced SELECT * FROM employees
database: XE WHERE (employees.id = 1)
username: blogdemo
Oracle optimizer
password: blogdemo
encoding: utf8 SELECT * FROM employees WHERE
cursor_sharing: similar (employees.id = :SYS_B_0)

17. Oracle Data Types
Ruby Rails Oracle
Fixnum :integer NUMBER
Float :float NUMBER
BigDecimal :decimal NUMBER, DECIMAL
Time :datetime DATE
Time :time DATE
Date :date DATE
String :string VARCHAR2
String :text CLOB
String :binary BLOB
True/FalseClass :boolean NUMBER(1), CHAR(1)

18. Citi ierobežojumi
Identifikatori līdz 30
lēni Data Dictionary skatījumi
simboliem
CLOB / BLOB izmantošana
tukšs String == NULL
SQL pieprasījumos
Oracle XE nav uz Mac OS X
LIMIT, OFFSET neesamība

19. Multi platformu
atbalsts
oracle_enhanced adapter
Ruby/YARV
MRI 1.8.6 JRuby
1.9.1
ruby-oci8 1.x ruby-oci8 2.x JDBC

20. PL/SQL izsaukšana no
Ruby
require quot;oci8quot;
conn = OCI8.new(quot;hrquot;,quot;hrquot;,quot;xequot;)
cursor = conn.parse <<-EOS
BEGIN
:return := test_uppercase(:p_string);
END;
EOS
cursor.bind_param(':p_string',quot;xxxquot;,String)
cursor.bind_param(':return',nil,String,4000)
cursor.exec
puts cursor[':return']
cursor.close

21. ruby-plsql gem
gem install ruby-plsql
require quot;ruby-plsqlquot;
plsql.connection = OCI8.new(quot;hrquot;,quot;hrquot;,quot;xequot;)
puts plsql.test_uppercase('xxx')

22. ruby-plsql gem
plsql.connection = OCI8.new(quot;hrquot;,quot;hrquot;,quot;xequot;)
plsql.test_uppercase('xxx') # => quot;XXXquot;
plsql.test_uppercase(:p_string => 'xxx') # => quot;XXXquot;
plsql.test_copy(quot;abcquot;, nil, nil) # => { :p_to => quot;abcquot;,
# :p_to_double => quot;abcabcquot; }
plsql.test_copy(:p_from => quot;abcquot;, :p_to => nil, :p_to_double => nil)
# => { :p_to => quot;abcquot;,
# :p_to_double => quot;abcabcquot; }
plsql.hr.test_uppercase('xxx') # => quot;XXXquot;
plsql.test_package.test_uppercase('xxx') # => 'XXX'
plsql.hr.test_package.test_uppercase('xxx') # => 'XXX'
plsql.logoff

23. class Employee < ActiveRecord::Base
set_create_method do
plsql.employees_pkg.create_employee(
:p_first_name => first_name,
:p_last_name => last_name,
:p_employee_id => nil
)[:p_employee_id]
PL/SQL end
set_update_method do
procedūras plsql.employees_pkg.update_employee(
esošās
:p_employee_id => id,
:p_first_name => first_name,
datubāzēs
:p_last_name => last_name
)
end
set_delete_method do
plsql.employees_pkg.delete_employee(
:p_employee_id => id
)
end
end

24. Paldies!
http://blog.rayapps.com
http://github.com/rsim