Signed URLs with Ruby on Rails
Using ActiveRecord's #signed_id and .find_signed methods you can create
URLs that expire
Show archive.org snapshot
after some time. No conditionals or additional database columns required.
Related cards:
Lightning Talk: Coverage based Test Case Prioritization in Ruby on Rails
For my computer science bachelor's thesis I programmed and evaluated a CLI Test Case Prioritization (TCP) tool for makandra. It has been written as a Ruby Gem and was tested and evaluated against one Ruby on Rails project....
Ruby on Rails » Keeping Up With The Joneses: Keeping Rails and its extensions up to date » Pathfinder Development
There are many wonderful things about Rails and the Rails ecosystem. A clean, well-lighted path for keeping all your extensions up to date is not one of them.
Fix [RubyODBC]Cannot allocate SQLHENV when connecting to MSSQL 2005 with Ruby 1.8.7. on Ubuntu 10.10
I followed this nice guide Connecting to MSSQL with Ruby on Ubuntu - lambie.org until I ran in the following errors:
irb(main):001:0> require "dbi"; ...
Using PostgreSQL and jsonb with Ruby on Rails
Postgres 9.4 introduces a new column type: jsonb. json and jsonb columns store data differently, so just compare the two when you want to store JSON data and choose the one that matches your use case best.
Rails 4.2 includes support for `js...
Ruby, Ruby on Rails, and _why: The disappearance of one of the world’s most beloved computer programmers
Nice article to educate your non-geek girlfriend/boyfriend about the joys of programming.
Using mime types with send_file
When using send_file (for example for attachments of any kind), make sure your application knows the correct mime types so that all browsers can handle the files. It is much more convenient for users if they can decide to open a file directly in...
Working with or without time zones in Rails applications
Rails supports time zones, but there are several pitfalls. Most importantly because Time.now and Time.current are completely different things and code from gems might use one or the other.
Especially configuring an application that cares only...
How to silence UTF-8 warnings on Rails 2.3 with Ruby 1.9
Rails 2.3.16+ on Ruby 1.9 causes warnings like this:
.../gems/activesupport-2.3.17/lib/active_support/core_ext/string/output_safety.rb:22: warning: regexp match /.../n against to UTF-8 string
Many thanks to grosser for supplying a [monkey-pa...
Postgres: DISTINCT ON lets you select only one record per ordered attribute(s) for each group
-
To retrieve only unique combinations of the selected attributes: You can omit rows, where all selected columns are equal with the
DISTINCTstatement. - To retrieve the group wise maximum of certain columns: You can keep only one record fo...
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...