Ruby on RailsOracle adaptera izstrāde

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Raimonds Simanovskis

TietoEnator Alise

Kas irRuby on

Rails?

Ruby irobjektorientēta

dinamiskaprogrammēšanas valoda

vienkārša pēc izskata

spēcīgas iespējas

Ruby on RailsModerns “tīmekļa lietojumu ietvars”

Veidots Ruby programmēšanas valodā

Radies no 37signals Basecamp aplikācijas

Atvērtā koda programmatūra

Fokusējas uz izstrādātāju produktivitāti

Spējā (Agile) programmatūras izstrādes pieeja

PamatprincipiNeatkārto sevi

DRY - Don’t Repeat Yourself

Vienošanās nevis konfigurēšanaConvention over Configuration

Programmatūra ar viedokliOpinionated software

Komponentes

Active Record (Model)

Action Controller

Action View

Ruby platformasMRI 1.8.6

Ruby/YARV 1.9.1

JRuby

Rubinius IronRuby MacRuby

MagLev BlueRuby

Ruby => Oracle

Ruby application

ruby-oci8

require 'oci8'OCI8.new('scott', 'tiger').exec('select * from emp') do |r| puts r.join(',')end

Oracle Instant Client Oracle Database

SQL*Net

JRuby => Oracle

Ruby application

JRuby

require "java"sql = JavaSQL::DriverManager.getConnection(db, user, password)statement = sql.createStatementstatus = statement.execute "select * from parts;"rs = statement.getResultSet()

JDBC driver Oracle Database

SQL*Net

ActiveRecordOracle Enhanced

Adapter

Ruby on Rails=> Oracle

gem install activerecord-oracle_enhanced-adapter

database.ymldevelopment: adapter: oracle_enhanced database: XE username: blogdemo password: blogdemo encoding: utf8

SQL bind variables

database.ymldevelopment: adapter: oracle_enhanced database: XE username: blogdemo password: blogdemo encoding: utf8 cursor_sharing: similar

Employee.find(1)

SELECT * FROM employees WHERE (employees.id = 1)

SELECT * FROM employees WHERE (employees.id = :SYS_B_0)

ActiveRecord

Oracle optimizer

Oracle Data TypesRuby Rails Oracle

Fixnum :integer NUMBERFloat :float NUMBER

BigDecimal :decimal NUMBER, DECIMALTime :datetime DATETime :time DATEDate :date DATEString :string VARCHAR2String :text CLOBString :binary BLOB

True/FalseClass :boolean NUMBER(1), CHAR(1)

Citi ierobežojumi

Identifikatori līdz 30 simboliem

CLOB / BLOB izmantošana SQL pieprasījumos

LIMIT, OFFSET neesamība

lēni Data Dictionary skatījumi

tukšs String == NULL

Oracle XE nav uz Mac OS X

Multi platformu atbalsts

MRI 1.8.6 Ruby/YARV 1.9.1

JRuby

ruby-oci8 1.x ruby-oci8 2.x JDBC

oracle_enhanced adapter

PL/SQL izsaukšana no Ruby

require "oci8"conn = OCI8.new("hr","hr","xe")

cursor = conn.parse <<-EOSBEGIN :return := test_uppercase(:p_string);END;EOScursor.bind_param(':p_string',"xxx",String)cursor.bind_param(':return',nil,String,4000)cursor.execputs cursor[':return']cursor.close

ruby-plsql gem

gem install ruby-plsql

require "ruby-plsql"plsql.connection = OCI8.new("hr","hr","xe")

puts plsql.test_uppercase('xxx')

ruby-plsql gemplsql.connection = OCI8.new("hr","hr","xe")

plsql.test_uppercase('xxx') # => "XXX"plsql.test_uppercase(:p_string => 'xxx') # => "XXX"plsql.test_copy("abc", nil, nil) # => { :p_to => "abc", # :p_to_double => "abcabc" }plsql.test_copy(:p_from => "abc", :p_to => nil, :p_to_double => nil) # => { :p_to => "abc", # :p_to_double => "abcabc" }plsql.hr.test_uppercase('xxx') # => "XXX"plsql.test_package.test_uppercase('xxx') # => 'XXX'plsql.hr.test_package.test_uppercase('xxx') # => 'XXX'

plsql.logoff

PL/SQL procedūras

esošās datubāzēs

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] end set_update_method do plsql.employees_pkg.update_employee( :p_employee_id => id, :p_first_name => first_name, :p_last_name => last_name ) end set_delete_method do plsql.employees_pkg.delete_employee( :p_employee_id => id ) endend

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