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LABS
Standup, 6/7/2010

Interesting

Our custom Chef recipe stopped working on EY cloud

We have some custom Chef recipes that we have been running on EY Cloud for some time. The code for these custom recipes was using the chef-deploy gem, which was apparently always available in the environment in which the recipe ran.

However, when we ran our recipe last week, it blew up trying to require the gem. We fixed this by removing the require and folding some of the code from the gem into our recipe.

There is a corresponding issue in the EY community forums:

https://community.engineyard.com/discussions/problems/1193-error-in-deploying-the-application

PIVOTAL LABS
Standup 4/28/2010: Webrat threading errors & new RubyMine version

Ask for Help

"We keep getting webrat thread exceptions running our integration specs with the rails integration runner: Thread tried to join itself. The error message varies with different versions of ruby 1.8.6 vs 1.8.7."

Anyone had this problem or know why?

"How do I skin an iphone mobile site to be the correct width so it's not 980px wide?"

<meta name="viewport" content="width = device width" />

*"We're trying to deploy some nginx configuration changes to EngineYard Cloud, what's the right way to do that?"

We've tried building custom chef recipes to solve this problem, but they run after nginx has already restarted, so are a poor solution to this problem. The better solution might be to check in configuration files into the application and symlink them into the nginx configuration directory using a before_symlink.rb hook in the /deploy directory.

*"We've got a has_many association where some of the child records are originally saved in an invalid state. When we later load the parent and ask it if it's valid, it returns true even with validates_associated. How can we get the desired validation behavior?"

Turns out that unloaded associations are not validated. Solution: load the association before calling .valid? on the parent. In general, you should also not create invalid objects, instead using a state variable to put them into a "draft" or "incomplete" state where they are still valid but not complete. Then remove that state and you'll see the errors required to finish that object.

Interesting Things

  • When RubyMine 2.0.1 won't run your focused specs, try attaching rspec 1.2.9 to it rather than 1.3.x. It fixed this issue for one of our teams.
  • Rubymine 2.0.2 came out today: can finally run focused contexts?! Also including bundler support! What's new
  • We tried our Unicorn on EngineYard cloud: so far so good. It's still "experimental" but seems to work.