django - Calculated value (aggregation) displays in technical format -

after calculating field in model want display field in template

model:

  def _get_total(self):             inventory.models import inventory             purchase.models import poproduct             sales.models import soproduct         #    "returns total"              return inventory.objects.filter(warehouse_bin__material_uom__uom__material=self.id ).aggregate(sum('quantity'))               #- soproduct.objects.filter(product__material=self.id).aggregate(sum('quantity'))      #poproduct.objects.filter(product__material=self.id).aggregate(sum('quantity'))      total = property(_get_total) 

template:

<div> <b>total on hand:</b> {{ data.material.total }}</div> 

however template displayed value in format instead of plain numeric value

total on hand: {'quantity__sum': decimal('97.00000')}

i trying add parameter , output_field = models.decimalfield() sum function getting error not understand

'decimalfield' object has no attribute 'resolve_expression

'

you returning result set method dict, try returning decimal value:

quantity = inventory.objects.filter(warehouse_bin__material_uom__uom__material=self.id ).aggregate(sum('quantity')) return quantity['quantity__sum']