user502052 questions

• How to auto-load data in the test database before to test my application?
• How to set headers of a JSON/XML response in 'format.json/xml { render :json/xml => @user.to_json/xml }'?
• How to make 'attr_reader' or 'attr_writer' for all class variables at one time?
• Advice on using modules with Ruby on Rails
• What is the best way to develop and test cache in a Ruby on rails application?
• How to generate correct URLs in mailer templates?
• Is it possible to pass variables to actions using Ruby on Rails 3?
• Compare each value of two ActiveRecords returning a boolean variable
• Updating to Rails 3.2.2: How to properly move my plugin from the '/vendor' to '/lib' directory?
• Performance differences between '.find' and '.where' methods

user502052 answers