how can i edit multiple objects/row atonce in django html template - django

Question

i facing an problem on my django project . i try to edit and update an objects . but it's showing an error which is name is MultipleObjectsReturned .
hear is my issue screenshots .
when i was clicked this update button ( user can update which he went ) . than showing next 2nd image
1st img
showing this error
2nd image
Views.py
def purchase_order_item_update(request,order_id):
purchase_item_list = Purchase_order_item.objects.filter(order_id=order_id)
# porder = Purchase_order_item.objects.get(order_id=order_id)
# this is the form for getting data from html
if request.method == 'POST':
for bt in Purchase_order_item.objects.filter(order_id=order_id):
pu_id = bt.puid # product Id
quantity = request.POST.get('asqty')
unit_price = request.POST.get('uprice') # itemid = pk type
total = int(quantity) * float(unit_price)
cv = Purchase_order_item.objects.get(puid=pu_id)
cv.quantity = quantity
cv.unit_price = unit_price
cv.total_price = total
cv.save()
return redirect('purchase_order_item',order_id= order_id)
return render(request,'back/purchase/assign_purchas_item.html',
{'purchase_item_list':purchase_item_list, })
Actually i went to edit and update this list of entries and update also if user making any typing mistake then he can update .
thank you

Answer 1

the error is pretty descriptive:
cv = Purchase_order_item.objects.get(puid=pu_id)
returns more than one object. When using 'get' the ORM layer expects only one result, which is not the case you have. You most likely duplicated the puid value while testing. It happens often. In order to fix that you need to delete the second object that has the same puid, and ideally find out how you ended with two on the same uid value.