Sequel: The Database Toolkit for Ruby
Seems like a useful gem for cases where ActiveRecord is overkill but you don't want to do everything by hand either.
Related cards:
Use DatabaseCleaner with multiple test databases
There is a way to use multiple databases in Rails.
You may have asked yourself how you're able to keep your test databases clean, if you're running multiple databases with ful...
Remove resource fork files from a FAT volume on MacOS
Be careful!
The following solution will delete files on a volume. If you don't know exactly what you're doing, you can run into big trouble with your computer.
I play mp3 files on my car stereo that are stored on a SD-C...
The Ruby Object Model
In Ruby (almost) everything is an Object
. While this enables a lot of powerful features, this concept might be confusing for developers who have been programming in more static languages, such as Java or C#. This card should help understanding t...
Good real world example for form models / presenters in Rails
We have often felt the pain where our models need to serve too many masters. E.g. we are adding a lot of logic and callbacks for a particular form screen, but then the model becomes a pain in tests, where all those callbacks just get in the way. O...
Ruby number formatting: only show decimals if there are any
Warning: Because of (unclear) rounding issues and missing decimal places (see examples below),
do NOT use this when dealing with money. Use our amount helper instea...
How to build the perfect number of blank records for a nested form
When you render a nested form for a Movie
which has_many :actors
, you want to render the right number of blank Actor
forms. The right number means:
- A minimum number of blank forms so the user can add more
Actors
to an existingMovie
, ...
How to make changes to a Ruby gem (as a Rails developer)
At makandra, we've built a few gems over the years. Some of these are quite popular: spreewald (> 1M downloads), active_type (> 1M downloads), and geordi (> 200k downloads)
Developing a Ruby gem is different from developing Rails applications, w...
Missing certificates for rubygems and bundler in Ruby 1.8.7
Using Ruby 1.8.7 you will not be able to use the maximum versions Rubygems 1.8.30 and Bundler 1.17.3 with https://rubygems.org/
anymore. This is a result of a server certificate on December 5th, 2020. The resulting errors will...
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...
Connecting the "sequel" gem to MSSQL via ODBC
After you configured your ODBC describe in
- [Fix [RubyODBC]Cannot allocate SQLHENV when connecting to MSSQL 2005 with Ruby 1.8.7. on Ubuntu 10.10](https://makandracards.com/makandra/7553-fix-rubyodbc-cannot-allocate-sqlhenv-when-connecting-to-ms...