How to connect to Microsoft sql server2005 from rails on linux（centos5)

Assumed:

ruby 1.8.6

rails : 2.2.2

centos5 64bit

sqlserver2005

Required:

unixODBC >= 2.2.11 (http://www.unixodbc.org/)

FreeTDS >= 0.63 (http://www.freetds.org/)

Ruby ODBC >= 0.996 (http://www.ch-werner.de/rubyodbc/)

Ruby DBI >= 0.0.23 (http://ruby-dbi.sourceforge.net/)

First:

Use ~/.bashrc for your local profile or /etc/profile to set this for all users.

export ODBCINI=/etc/odbc.ini

export ODBCSYSINI=/etc

export FREETDSCONF=/etc/freetds/freetds.conf

install unixODBC:

apt-get install unixODBC or yum install unixODBC

but I am use rpm,like this: rpm -ivh unixODBC-2.2.11-7.1.x86_64.rpm

you can install unixODBC manually,like this:

# cd /usr/local/src

# wget http://www.unixodbc.org/unixODBC-2.2.11.tar.gz
# tar -xzvf unixODBC*.tar.gz

#cd unixODBC*

# ./config --prefix=/usr/local -sysconfdir=/etc --disable-gui

#make

#make install

install FreeTDS:

you can install freetds by apt-get or yum.

rpm -ivh freetds-0.64-11.el5.centos.x86_64.rpm

or install freetds manually,like this:

wget ftp://ftp.ibiblio.org/pub/Linux/ALPHA/freetds/stable/freetds-stable.tgz
tar -xzvf freetds-stable*.tgz

cd freetds-stable*

./configure —with-unixodbc=/usr/local

make

make install

configure FreeTDS:

add a section to /etc/freetds/freetds.conf or /etc/freetds.conf:

[your_db_name]

host = 192.168.1.101  (change this to the right one for you)

port = 1433

tds version = 8.0   #(might be different, check "here":http://www.freetds.org/userguide/choosingtdsprotocol.htm.)                             #8.0 is the minimum for some important features of SQL server

Test FreeTDS:

tsql -S your_db_name -U name -P pw

you should see and do the following to make sure all went well:

locale is "zh_CN"
locale charset is "GB2312"
1>use your_actual_db

2> go

1> select * from user (do this for a table that exists in your db)

2> go

id login

1 user1

2 user2

(make sure you get correct output)

1>quit

create db definition

edit: /etc/odbc.ini:

[your_db_name]

Driver = FreeTDS

Description = ODBC connection via FreeTDS

Trace = No

Servername = your_db_name

Database = your_actual_db

edit: /etc/odbcinst.ini:

[FreeTDS]
Description = TDS driver (Sybase/MS SQL)
Driver = /usr/lib64/libtdsodbc.so
Setup = /usr/lib64/libtdsS.so
CPTimeout =
CPReuse =
FileUsage = 1
Socket = 4096

Test unixODBC:

isql -v your_db_name username pw

You should see:

+---------------------------------------+
| Connected! |
| |
| sql-statement |
| help [tablename] |
| quit |
| |
+---------------------------------------+
SQL> select * from user

+---------------------------------------+
| id | login |
+---------------------------------------+
| 1 | user1 |
| 3 | user2 |
+---------------------------------------+
2 rows affected
2 rows returned

SQL> quit

ruby odbc:

gem install dbi

gem install dbd-odbc

Test everything:

# irb1.8 irb(main):001:0> require "dbi"

=> true

irb(main):004:0> dbh = DBI.connect('dbi:ODBC:your_db_name', 'username', 'pw')

=> #<DBI::DatabaseHandle:0xb7d28688 @trace_output=#<IO:0xb7d79064>, @trace_mode=2, @handle=#<DBI::DBD::ODBC::Database:0xb7d28480 @attr={}, @handle=#<ODBC::Database:0xb7d284a8>>> irb(main):005:0> quit

Setup rails:

database.yml

development:

adapter: sqlserver

mode: odbc

dsn: your_db_name

username: USERNAME

password: PASSWORD

Last:

gem install activerecord-odbc-adapter

Everything is ok,now test the rails:

[root@b03 ruby]# ruby script/console
Loading development environment (Rails 2.2.2)
Tue Feb 23 14:59:18 +0800 2010 [Info] [Module] Copy plugin app_frame resources to Rails.public
Tue Feb 23 14:59:18 +0800 2010 [Info] [Module] Copy plugin endless_page resources to Rails.public
Tue Feb 23 14:59:18 +0800 2010 [Info] [Module] Copy plugin sfp_skin resources to Rails.public
>> ActiveRecord::Base.connection.execute('select * from message')
=> #<ODBC::Statement:0x7fce543a6360>
>>

参考：http://oldwiki.rubyonrails.org/rails/pages/HowtoConnectToMicrosoftSQLServerFromRailsOnLinux/versions/140