You probably already manage servers you often connect to inside the ~/.ssh/config file. What is nice: you may define alias...
When your cucumber features grow massively over time, the test execution can take a lot of time.
Occasionally you need to do something directly on the server -- like having all records recalculate something that cannot be done...
Ruby comes with a class BigDecimal which you can use for arbitrary precision arithmetic. You should use BigDecimal instead of...
When storing floating-point numbers such as prices or totals in an SQL database, always use a DECIMAL column. Never...
User Stories should describe what a user wants the system to do. Purely technical tasks should usually be implemented as...
The Edge Rider gem will define a method collect_ids on your ActiveRecord models, scopes, integer scalars and collections, which...
ActiveRecord gives you the :include option to load records and their associations in a fixed number of queries. This is...
User.active.to_sql Rails 2 Use either the Edge Rider or fake_arel gem to get #to_sql backported...
The Basic Authentication header encodes username and password. Effectively, it's just Base64 plus a "Basic" prefix.
It is common in Rails 3.0 applications that you want to provide default views for a group of controllers. Let...
Note: ActiveRecord::Base#becomes has a lot of quirks and inconsistent behavior. You probably want to use ActiveType.cast instead.
There is a nasty bug in all version of Rails 2 and some versions of Rails 3.x where two...
The information in this card is only relevant for Rails 2.3-era apps. This note gives a quick introduction into...
Sometimes you can make your life easier by not allowing a record attribute to be changed after the record was...
ActiveRecord comes with a method touch which sets the updated_at timestamp to the current time. Unfortunately it also runs...
Add deprecation warnings and their solution or link to available solutions. Global access to Rake DSL methods is deprecated. Please...
Pie sometimes does not properly redraw elements upon changes. This often happens when the change comes from somewhere further up...
The attached RSpec matcher exist_in_database checks if a given record still exists in the database and has not...
When you need to insert many records into the same table, performance may become an issue. What you can do...
You can find ActiveRecord models by using a Range as its conditions: User.scoped(:conditions => { :id => 3..5 }) This will generate...
You will occasionally need to clean out your database while keeping the schema intact, e.g. when someone inserted data in...
When you click a link or a press a button on a Selenium-controlled browser, the call will return control...
When you set both a record's association and that association's foreign key attribute, Rails does not realize you...