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Ruby ActiveRecord Basics Validation Errors 2

Posted by gbp
gbp
5,619 Points

ActiveRecord code challenge: Build a custom validator that ensures that no Contact’s last_name is Evil.

What is the solution to this? I am trying the following to no avail. Thanks for your help.

class Contact < ActiveRecord::Base
   validate :check_last_name
   def check_last_name
     if last_name => "Evil"
     error.add(:last_name, " is not allowed")
   end
 end

OR

class Contact < ActiveRecord::Base
   validate :check_last_name
   def check_last_name
     if last_name.includes?("Evil")
     error.add(:last_name, " is not allowed")
   end
 end

2 Answers

William Li
PLUS
William Li
Courses Plus Student 26,868 Points
William Li
William Li
Courses Plus Student 26,868 Points

Hi, gbp The 2nd solution is almost correct, though there're a few things need to be fixed.

  • you missed the a closing end for if condition
  • it's errors.add, not error.add
  • also, you use the String method includes? here, but we are NOT checking whether the last_name includes the word Evil, we are checking whether it equals to Evil.
class Contact < ActiveRecord::Base
   validate :check_last_name
   def check_last_name
     if last_name == "Evil"
       errors.add(:last_name, " is not allowed")
     end
   end
 end
gbp
gbp
5,619 Points
gbp
gbp
5,619 Points

William, thank you!