Validating a legal subdomain

rubyonrails-talk
1

I have a Rails app that uses subdomains as account keys. Users name their own subdomains. How can I validate those subdomains as legal?

2

Just like you would verify a user login. The subdomain then becomes part of the login procedure. You store it in a table and you “authenticate” the domain in a before_filter.

Best regards

Peter De Berdt

3

I think what Jeff meant is how to validate the subdomain as a normal combination of letters and integers without a bunch of strange keys. He's not talking about authentication, he's talking about validation.

I'll post here if I get this going Jeff. I'm also working on a way. It looks like it will have to be a regular expression.

4

I eventually settled on a regex that permits only letters, numbers and hyphens. Close enough for my needs:

  validates_format_of :subdomain,                           :with => /^[a-zA-Z0-9\-]*?$/,                           :message => 'accepts only letters, numbers and hyphens'

Hope that's helpful!

Jeff

5

That is pretty much what I was going to recommend.

6

Thanks Jeff. =)