Tony Fontenot questions

Tony Fontenot answers

• Validate number of nested attributes
• decorating an attribute in rails
• Best way to implement Categories and Subcategories with flexible depth in Rails?
• Creating a Blog ruby on Rails - Problem Deleting Comments
• Undefined method 'map' for nil:NilClass
• Rails AR validates_uniqueness_of against polymorphic relationship
• Start or ensure that Delayed Job runs when an application/server restarts
• Finding records that overlap a range in Rails
• Add record to a has_and_belongs_to_many relationship
• belongs_to with :class_name option fails