How do I fix the “You don’t have write permissions into the /usr/bin directory” error when installing Rails?
I’m trying to install Rails 3 on a brand new MacBook Pro running OS X 10.6.3, Ruby 1.8.7, and Rails 2.3.5 and I’m … Read more
ruby-on-rails-3
Ruby on Rails Callback, what is difference between :before_save and :before_create?
Could you explain in detail what the :before_save and :before_create Ruby on Rails callbacks are, and what they have to do with Rails … Read more
Repairing Postgresql after upgrading to OSX 10.7 Lion
I recently upgraded to OSX 10.7, at which point my rails installation completely borked when trying to connect to the psql server. When … Read more
ActiveRecord OR query
How do you do an OR query in Rails 3 ActiveRecord. All the examples I find just have AND queries. Edit: OR method … Read more
What is the right way to override a setter method in Ruby on Rails?
I am using Ruby on Rails 3.2.2 and I would like to know if the following is a “proper”https://stackoverflow.com/”correct”https://stackoverflow.com/”sure” way to override a … Read more
Is it possible to run a single test in MiniTest?
I can run all tests in a single file with: rake test TEST=path/to/test_file.rb However, if I want to run just one test in … Read more
Validate uniqueness of multiple columns
Is there a rails-way way to validate that an actual record is unique and not just a column? For example, a friendship model … Read more
Best way to pretty print a hash
I have a large hash with nested arrays and hashes. I would like to simply print it out so it ‘readable’ to the … Read more
Understanding :source option of has_one/has_many through of Rails
Please help me in understanding the :source option of has_one/has_many :through association. The Rails API explanation makes very little sense to me. “Specifies … Read more
ActiveRecord: size vs count
In Rails, you can find the number of records using both Model.size and Model.count. If you’re dealing with more complex queries is there … Read more