Trying to use form_for or fields_for to get one record for display

The reason I'm doing this is that the app is for a foodbank, and I'm trying to use a model as an attendance list. The model will have a date field, with a new record for each month. I need to display only the record for the current month, as way to safeguard against someone visiting too often. I'd like to use checkboxes for when a person attended this month, which is the reason for the form_for.

Bob Smith <>