I am trying to build vanity urls with FriendlyId gem for a specific model Teacher to display
www.mysite.com/teachers/{first_name}-{last_name}
instead of
wwww.mysite.com/teachers/{id}
The problem that I encounter is that the information on the {first_name} / {last_name} is stored in the table Contact accessible through User and not in Teacher's one. The relation between the tables is as follows:
- Teacher belongs_to :user
- User has_one :contact
I added in my Teacher model:
extend FriendlyId
friendly_id :full_name_to_url, use: :slugged
So FriendlyId calls the method full_name_to_url to create the slug:
def full_name_to_url
"#{self.user.contact.first_name.downcase.gsub(" ","-")}-#{self.user.contact.last_name.downcase.gsub(" ","-")}"
end
I received the following message when trying to apply and save all the changes to the already existing records: Teacher.find_each(&:save)
NoMethodError: undefined method `contact' for nil:NilClass
I guess there is something wrong with my method?
