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...

In order to keep the controllers directory tidy, we recently started to namespace controllers. With the :controller option you can tell Rails which controller to use for a path or resource. For nested resources, Rails will determine the view pat...

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...

Recently, we had an interesting lunch-break with the rails 3.1. asset-pipeline in production mode. Daniel Zahn made a blogpost about our journey, precompiling assets, fingerprinting, Haml, Sass & Compass and what he calls "the dark heinous hutch".

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...

The issue

Yesterday, Rails fixed a security issue (CVE-2014-3514) in Rails 4+. It was possible to use .where or .create_with to bypass Rails' [Strong Param...

Let's say you have two screens:

1. Show a given project
2. Show a report for all projects

Ideally you want both screens to be handled by different controllers like this:

GET /projects/:id        => ProjectsController#show
GET /projects/...

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+...

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 ...

It occurred to me that many Rails/Passenger/Apache applications may have caching set up in a way that it appears to be caching, when it is not actually caching.