I'm trying to find the most effective way to generate an aggregation
report. The models involved are:
Customer --(has_many)--> Charges
What I'm trying to do is find the total charges during the year for
each customer by account. In other words, a function like:
in the customer model that will return a hash of each account charged
and the customer's total charges to that account.
From what I've read I don't think I should be using named_scope, since
this involves associations...