How to get a random number in Ruby
How do I generate a random number between 0 and n? 17 s 17 Use rand(range) From Ruby Random Numbers: If you needed … Read more
ruby-on-rails
Can’t find the ‘libpq-fe.h header when trying to install pg gem
I am using the Ruby on Rails 3.1 pre version. I like to use PostgreSQL, but the problem is installing the pg gem. … Read more
How to rollback a specific migration?
I have the following migration file db\migrate\20100905201547_create_blocks.rb How can I specifically rollback that migration file? 15 s 15 rake db:rollback STEP=1 Is a … Read more
Getting error: Peer authentication failed for user “postgres”, when trying to get pgsql working with rails
I’m getting the error: FATAL: Peer authentication failed for user “postgres” when I try to make postgres work with Rails. Here’s my pg_hba.conf, … Read more
Understanding the Rails Authenticity Token
I am running into some issues regarding the Authenticity Token in Rails. I would really like to understand the Authenticity token. Do you … Read more
How do I get the current absolute URL in Ruby on Rails?
How can I get the current absolute URL in my Ruby on Rails view? The request.request_uri only returns the relative URL. 33 s … Read more
Why do people use Heroku when AWS is present? What distinguishes Heroku from AWS? [closed]
Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be … Read more
How to understand nil vs. empty vs. blank in Ruby
I find myself repeatedly looking for a clear definition of the differences of nil?, blank?, and empty? in Ruby on Rails. Here’s the … Read more
How can I rename a database column in a Ruby on Rails migration?
I wrongly named a column hased_password instead of hashed_password. How do I update the database schema, using migration to rename this column? 3 … Read more