ActiveRecord 3+ auto-converts times to UTC by default. Hilarity ensues.
Remember how Rails 2 came with an awesome feature that broke all code using Time.now or Time.parse?
This behavior is now the default for Rails 3. Disable it by adding the following to your config/application.rb:
config.active_record.default_timezone = :local
config.active_record.time_zone_aware_attributes = false
Related cards:
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...
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+...
Customize tokenization of the MySQL FULLTEXT parser
The way MySQL's FULLTEXT tokenizer splits text into word tokens might not always be what you need. E.g. it splits a word at period characters.
Since the tokenizer has near-zero configuration options (minimum word length and stopwords list), you n...
Too many parallel test processes may amplify flaky tests
By default parallel_tests will spawn as many test processes as you have CPUs. If you have issues with flaky tests, reducing the...
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...
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...
Story Checklist Template
This is an story checklist I use to work on stories. For this purpose I extracted several cards related to the makandra process and ported them into a check list...
Invoices: How to properly round and calculate totals
While it might seem trivial to implement an invoice that sums up items and shows net, gross and vat totals, it actually involves a lot of rules and caveats. It is very easy to create invoices where numbers don't add up and a few cents are missing....
How to make Rational#to_s return strings without denominator 1 again
The way Rational#to_s works on Ruby has changed from Ruby 1.9 on. Here is how to get the old behavior back.
You may want this for things where Rationals are being used, like when subtracting Date objects from one another.
What's happening?...
How to: Upgrade CarrierWave to 3.x
While upgrading CarrierWave from version 0.11.x to 3.x, we encountered some very nasty fails. Below are the basic changes you need to perform and some behavior you may eventually run into when upgrading your application. This aims to save you some...