Topic: excluding rows from other table

Hi,

I have 2 models:

Subscriber
  - id
  - name:string
  - email:string

Submission
  - id
  - name:string
  - email:string
  - path:string
  - ip:string
 
 
They don't have any relation.


I'd like to select all rows from subscribers and exclude rows with email address inserted in submission table where url equals 'some/path'.

What is the most elegant way to do accomplish this with Rails?

Thanks for help