Philipp Schmid » RubyOnRails

David Heinemeier Hansson at Startup School 08

Philipp Schmid — Mon, 07 Sep 2009 20:13:41 +0000

Pragmatic Programmers

Philipp Schmid — Tue, 21 Jul 2009 13:18:26 +0000

I absolutely love the books from “The Pragmatic Programmers“. They are really well written and the cool thing is, you can get them as DRM free PDF. And the even cooler thing is, you buy and read them while there are being written!

How great is that?

Below is a screenshot of my Pragmatic Bookshelf and I can recommend all of the books, except the “iPhone SDK Development” – because I haven’t read it yet.

And if you buy the ebook version (and I usually do, as I don’t like hard copy books for technical literature ) and they correct any errors in the book, you get a free update.

Sometimes they even add further chapters or in case of “Hello Android”, they updated the whole book for a completely new SDK release!

My Pragmatic Bookshelf

Building the postgres gem for a 64bit PostgreSQL on Snow Leopard (10.6)

Philipp Schmid — Wed, 24 Jun 2009 16:46:57 +0000

sudo env ARCHFLAGS=”-arch x86_64″ gem install postgres

Enable SSH Agent (Key) Forwarding on Snow Leopard

Philipp Schmid — Tue, 23 Jun 2009 09:40:12 +0000

I’m using Git and Capistrano to deploy some ruby applications on multiple servers. My Git setup is done with gitosis which uses a key based authentication over ssh. The deployment script logs into the remote servers and checks out the current application version via Git.

Now to have this working, one must forward the private key, used to authenticate with git, to the server which does the checkout. This is done by the ssh-agent process, which whom you can register your keys by running the command ssh-add.

After switching to Snow Leopard, my deployment script stopped working, because somehow the ssh key didn’t get forwarded to the server and I was presented with a login prompt: “Enter password for git@git.gitserver.local:”. Of course I don’t have a password, because gitosis uses key based authentication only.

To make a long story short, Snow Leopard ships with key forwarding disabled by default and you will have to modify the file /etc/ssh_config to get it working.

Just change the lines

# Host *
# ForwardAgent no

into

Host *
ForwardAgent yes

and you are good.

Ruby/Rails and MySQL on Snow Leopard (10A380)

Philipp Schmid — Sun, 14 Jun 2009 11:20:43 +0000

First get and install the 64bit MySQL version:

http://dev.mysql.com/get/Downloads/MySQL-5.1/mysql-5.1.35-osx10.5-x86_64.dmg/from/pick#mirrors

Then install the MySQL gem the following way:

sudo gem install mysql — –with-mysql-config=/usr/local/mysql/bin/mysql_config

Rails Version

Philipp Schmid — Tue, 17 Mar 2009 13:35:59 +0000

How do you find out on which version of Rails your code is running?

script/console
Loading development environment (Rails 2.3.2)
>> Rails::VERSION::STRING
=> “2.3.2″
>> Rails::VERSION::MAJOR
=> 2
>> Rails::VERSION::MINOR
=> 3
>> Rails::VERSION::TINY
=> 2
>> Rails::VERSION.constants
=> ["TINY", "STRING", "MINOR", "MAJOR"]
>>