[Answer]-Django create object without affecting database

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Only django.db.Model instances are stored in the database (and only if you explicitely ask for it). Else this is just plain old Python and you can create and use your own classes as you see fit.

But anyway: if all you need is a year-indexed collection of (date, amount) items, then a dict of dicts is enough:

{
   '2013': {
      'amount': Decimal('92.96892879384746351465539182'), 
      'date': datetime.date(2013, 10, 25)
      },
   # etc
}

Or if you need more than one (amount, date) per year, a dict with lists or dicts:

{
   '2013': [
      {
        'amount': Decimal('92.96892879384746351465539182'), 
        'date': datetime.date(2013, 10, 25)
      },
      {
        'amount': Decimal('29.9689287'), 
        'date': datetime.date(2013, 10, 21)
      },
    ],

   # etc
}

In fact the proper structure depends on how you’re going to use the data.

👤bruno desthuilliers

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