Rails custom validation based on a regex?

Question

I have the following regex that I use in my routes.rb for /type-in-something-here

# A-Z, a-z, 0-9, _ in the middle but never starting or ending in a _
# At l         


        

Answer 1

validates :name, format: { with: /\A[a-zA-Z]+\z/,
message: "Only letters are allowed" }