On Jan 18, 6:45 pm, skt <[email protected]> wrote: > Folks, > > I have setup Single Table Inheritance with my User model. Now the user > can have multiple roles. In my situation (a school app) the user can > be a Teacher (through which I want to access the students, grades etc) > and the same user can also be a Parent (through which I want to access > the children info). In STI, the type column in the user table can > store only one type i.e. either Parent or Teacher. So when this user > logs in and I want to access students at one time and children at > another - through Teacher or Parent models respectively. > > The model hierarchy is as below - > > class User < ActiveRecord::Base > end > > class Parent < User > # relationships and functionality to work on children > end > > class Teacher < User > # relationships and functionality to work on students and grades etc > end > > Searched around but can't find anything on this. It doesn't look like > I can accomplish this through STI. However I have the Parent and > Teacher functionality setup through these STI models. What is the best > way to model/enable this?
I did this with a pretty gross hack on an app a while back - the roles were designed to be mutually exclusive, then the client changed their mind 4+ months in. The trick was to disambiguate the records by fiddling with the email - in my case, I added the (underscored) role to the email. So [email protected] who was (for instance) a Parent and a Teacher would have two records: Parent: email_address = '[email protected]' Teacher: email_address = '[email protected]' I had to tweak the code that handled login, and add some callbacks to keep the records in sync (as well as always de-mangling the emails for display). >From the UI side, I added a screen to allow users to switch between each of the roles; for the app, this made sense as each role had a somewhat different set of navigation tabs + view permissions. Not the cleanest solution, but it beat rewriting everything to accommodate multiple roles per user. --Matt Jones -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
