i'v been new to ruby and rails and encountered a rather strange error:
class Person < ActiveRecord::Base
validates_presence_of :description, :if => require_description_presence?
def require_description_presence?
self.can_send_email
end
end
raises
NoMethodError in PeopleController#index
undefined method `require_description_presence?' for #<Class:0x4c4fadc>
You should pass validation method as symbol:
validates_presence_of :description, :if => :require_description_presence?
You can make this even shorter and sweeter. The :if clause will take an attribute just as easily. So if can_send_email is a boolean attribute of Person, this will work:
class Person < ActiveRecord::Base
validates_presence_of :description, :if => :can_send_email?
end
No need to create another method just to check this attribute. And if you notice the extra question mark at the end of can_send_email, it's because Rails lets you do that with boolean attributes. I like it because it makes the code's purpose more clear.
