You can create a Logger object yourself from inside any model. Just pass the file name to the constructor and use the object like the usual Rails logger: class User < ActiveRecord::Base def my_logger @@my_logger ||= Logger.new(“#{Rails.root}/log/my.log”) end def before_save my_logger.info(“Creating user with name #{self.name}”) end end Here I used a class attribute to memoize … Read more
I use rake db:reset which drops and then recreates the database and includes your seeds.rb file. http://guides.rubyonrails.org/migrations.html#resetting-the-database
What Ruby on Rails TDD 101 article should I read? I will start with a guide to testing rails applications. Also Railscast has some excellent screencasts about how to use different testing tools. What do I need to test? I will start with models, since they are easy to test. The simple rule is that … Read more
For Gems I have seen many times that you define exceptions in this way: gem_dir/lib/gem_name/exceptions.rb and defined as: module GemName class AuthenticationError < StandardError; end class InvalidUsername < AuthenticationError; end end an example of this would be something like this in httparty For Ruby on Rails Put them in your lib/ folder under a file … Read more
As mentioned before, both methods do not provide any layer of additional “security” once your system is compromised. I believe that one of the strongest reasons to favor environment variables is version control: I’ve seen way too many database configurations etc. being accidentially stored in the version control system like GIT for every other developer … Read more
where returns ActiveRecord::Relation Now take a look at find_by implementation: def find_by where(*args).take end As you can see find_by is the same as where but it returns only one record. This method should be used for getting 1 record and where should be used for getting all records with some conditions.
In Rails 3: foos = Foo.unscoped.where(:baz => baz)
First – do not edit anything in your gem path! It will influence all projects, and you will have a lot problems later… In your project edit script/rails this way: #!/usr/bin/env ruby # This command will automatically be run when you run “rails” with Rails 3 gems installed from the root of your application. APP_PATH … Read more
The general convention is to use do..end for multi-line blocks and curly braces for single line blocks, but there is also a difference between the two that can be illustrated with this example: puts [1,2,3].map{ |k| k+1 } 2 3 4 => nil puts [1,2,3].map do |k| k+1; end #<Enumerator:0x0000010a06d140> => nil This means that … Read more
In my case rvm pkg install libyaml and rvm reinstall ruby-1.9.3-p125 solved the problem. For people using Ubuntu, make sure that libtool is installed prior to the steps above: sudo apt-get install libtool For macOS users (with homebrew): rm -rf /usr/local/lib/ruby/gems/ && brew reinstall ruby