Question

If the user doesn’t sign up with twitter or facebook the provider attribute is blank and the user is a pro user. I’ve added the pro attribute to the database as a boolean and the default is false.

I’m trying to toggle the pro attribute in the database to true using the code below.

  def pro?
    toggle!(:pro) if provider.blank? 
  end

However I get this error.

stack level too deep

I also tried
def pro?
:pro => true if provider.blank?
end
but get this error:

 syntax error, unexpected tASSOC, expecting keyword_end

Note I also need to use the pro method because it is used in many other places in the code.

Answer 1

If you have the pro attribute defined as boolean, the following methods are all available for free:

• pro? : returns the boolean value of the pro attribute
• pro= : sets the value of pro

A ruby method ending in a ? is expected to return a boolean, without any side-effects.

What I would do, in your case, is add a callback:

class User

  before_save :check_pro_status

  def check_pro_status
    pro = provider.blank?
  end

end

This will make sure that everytime something is changed in your user, before saving, it will set the pro-status correctly depending on the provider.

Hope this helps.