Passenger ignores RailsEnv directive for Rails 3 applications
You might find that your Passenger ignores all RailsSomething directives in the vhost for your new Rails 3 application. The culprit is a file config.ru which makes Passenger consider your application a Rack (non-Rails) application.
To fix this you can either use RackEnv in lieu of RailsEnv (it works fine) or delete the config.ru. Unless you have a good reason to do so, go with RackEnv.
Related cards:
Security issues with hash conditions in Rails 2 and Rails 3
Find conditions for scopes can be given either as an array (:conditions => ['state = ?', 'draft']) or a hash (:conditions => { 'state' => 'draft' }). The later is nicer to read, but has horrible security implications in some versions of Ru...
DNS debug tools
There are several tools for DNS debugging which offer you more or less information. Most of the time the more simple ones, like host oder nslookup will be sufficient.
host
simple DNS lookup utility.
>host heise.de
heise.de has addr...
Unpoly 3.7.1, 3.7.2 and 3.7.3 released
Version 3.7.0 broke some things in complex forms. Sorry for that. Concurrent user input is hard.
3.7.1
This change fixes two regressions for form field watchers, introduced by [3.7.0](https://unpoly.com...
Fix LoadError with Rails 3 applications on Passenger
After switching to Rails 3 you may get a LoadError with the following message when trying to use your application via passenger:
no such file to load -- dispatcher
Your Passenger version is most likely out of date.
Update the gem, then ins...
How to view Image Metadata on the Linux Command Line with ImageMagick
ImageMagick has a command line tool called identify which can read image metadata:
>identify -verbose DSC00136.JPG
Image: DSC00136.JPG
Format: JPEG (Joint Photographic Experts Group JFIF format)
Class: DirectClass
Geometry: 5472x3648+...
Passenger booting Rails 3 application in wrong environment
Passenger gives you the possibility to define in which environment your app should be started.
This has to be added to the VirtualHost configuration for Apache for Rails 2 applications:
RailsEnv development
When running Rails 3, you need
...
Customize your Bash prompt
The shell variable PS1 holds your bash prompt. You might want to change it to serve your needs best. Here is how to:
General
- non-printing escape sequences in your prompt have to be inclosed in
\[\e[and\]so your shell can...
Rails 3 routing: Be careful with matching routes *including their format*
Today, this line made me trouble. Can you spot the mistake?
match 'sitemap.xml' => 'feeds#sitemap', :constraints => { :format => 'xml' }, :as => 'sitemap'
The mistake is to match sitemap.xml. Rails will by default strip any dot-anythin...
Problems with Rails 3 Remote Links and Forms Using jQuery .live() in IE
There is a problem with AJAX response handling for Rails 3 remote links and forms in Internet Explorer. This problem affects applications still using jQuery 1.4.2.
Default views in Rails 3.0 with custom resolvers
It is common in Rails 3.0 applications that you want to provide default views for a group of controllers. Let’s say you have a bunch of controllers inside the Admin namespace and you would like each action to fallback to a default template. So if ...