Sunday, 24 May 2009

installing the mysql gem under leopard

I am building a new dev laptop (an MSI Wind u100 running Leopard!) and got everything going... but getting the mysql gem to install was tricky. I had installed MySQL from a binary DMG install.
The trick was to install the gem like so:
sudo gem install mysql -- --with-mysql-config=/usr/local/mysql/bin/mysql_config

Forcing a different render format

I am writing an OAuth system for FilmAmora for the iphone app (and anything else I guess) to use.
I want to always output xml from the controller that is handling the catalog output... but how to do that!

I came up with this:

  def list
render :template => "/catalogs/list.xml.builder", :content_type => "text/xml"

This will always output xml (with the right mime type) no matter what the requested format was.

Monday, 18 May 2009

Creating a new rails app with an old version

After much hunting I found how to do this

gem list rails

to see what versions you have. I need to create a 2.1.2 rails app. you can do that by issueing this command:

rails _2.1.2_ my_app

Sunday, 10 May 2009

cookies and hosts / domains

I have been struggling for weeks with a problem of users being logged in to, but not and I posted on Ruby Groups and even tried to hire someone to do the work... but to no avail.
Finally I think I cracked it today.

Two things. First, for some reason doing this didn't work:
  if RAILS_ENV == 'production'
config.action_controller.session = {
:session_key => '_my_session',
:session_domain => '',
:secret => 'xxx'
config.action_controller.session = {
:session_key => '_my_session',
:session_domain => '.mysite.local',
:secret => 'xxy'

So, I substituted this into each environment file:
config.after_initialize do
ActionController::CgiRequest::DEFAULT_SESSION_OPTIONS[:session_domain] = '.mysite.local'

That got my session's having the correct domain set ( meaning that the session was saved across subdomains.


But then I encountered a second problem. Cookies.
After switching to hide and seek / show and tell methods to enable me to page cache even pages that had logged in status all over them (more on this in another post) I needed some user info in a cookie. But my cookies were tied to the subdomain!
I was setting the cookies like this:

      cookies[:current_user] = {
:cart_items_count => cart_items_count,
:nothing => 1

I thought, ok I just need to add the domain in:
      cookies[:current_user] = {
:cart_items_count => cart_items_count,
:nothing => 1,
:domain => ActionController::CgiRequest::DEFAULT_SESSION_OPTIONS[:session_domain]

No...this didn't work. Everything was being chucked into the cookies 'value' and not the domain field (same happened if I added in an expires_at key). What was going on?
Aha! It is the json-izing.

So, I moved that out to a seperate variable:
      value = {:cart_items_count => cart_items_count, :nothing => 1}.to_json
cookies.delete :login, :domain => ActionController::CgiRequest::DEFAULT_SESSION_OPTIONS[:session_domain]
cookies[:current_user] = {
:value => value,
:domain => ActionController::CgiRequest::DEFAULT_SESSION_OPTIONS[:session_domain]

Now my cookies had the proper domain info and the value was still proper json. And now my users are logged in across sub domains!