Disallow multiple form submissions #28
Description
Store a has_applied Boolean or applied_at Date in Mongo to check whether user has already submitted an application.
If User has already applied, the solution can be one of the following:
- Show an error if they have already applied
- Display a message on the form ("Your application has been submitted" ?) and disable form
- Show an alternate view (date they submitted application and/or other details?). An alternate view may allow us to support other features.