How to pull an array from POST request with-in Django - django

Question

I am trying to extract an Array from a POST request using Django.
def settlements_orders(request):
database = "####"
if request.method == 'POST':
first_date = request.POST.get('first_date', False)
last_date = request.POST.get('last_date', False)
brands = request.POST.getlist('brands[]')
else:
first_date = '2020-01-01'
last_date = '2020-05-13'
brands= ['ICON-APPAREL']
settlements_orders = SettlementOrders.objects.using(database)\
.filter(posted_date__date__range=[first_date, last_date]) \
.filter(sku__brand__in=brands) \
.select_related('sku').select_related('posted_date') \
.values('sku__company','sku__brand','sku__department','sku__category','sku__sub_category',
'sku__parent_asin','sku__asin','sku__vendor', 'sku__color','sku__size','sku__case_pack',
'posted_date__year', 'posted_date__month'
)\
.annotate(count=Count('order_id'),
qty_sold=Sum('quantity_sold'),
qty_returned=Sum('quantity_returned'),
order_revenue=Sum('order_revenue'),
refund_revenue=Sum('refund_revenue'),
promotion=Sum('promotion'),
giftwrap_collected=Sum('giftwrap_collected'),
giftwrap_paid=Sum('giftwrap_paid'),
shipping_fees_collected=Sum('shipping_fees_collected'),
shipping_fees_paid=Sum('shipping_fees_paid'),
sales_tax_collected=Sum('sales_tax_collected'),
sales_tax_paid=Sum('sales_tax_paid'),
shipping_tax_collected=Sum('shipping_tax_collected'),
shipping_tax_paid=Sum('shipping_tax_paid'),
fulfillment_fees=Sum('fulfillment_fees'),
comission_fees=Sum('comission_fees'),
closing_fees=Sum('closing_fees'),
other_fees=Sum('other_fees'),
restock_fees=Sum('restock_fees'),
goodwill_paid=Sum('goodwill_paid'),
goodwill_reimbursed=Sum('goodwill_reimbursed'),
return_fees=Sum('return_fees'),
reimbursements=Sum('reimbursements'),
margin=Sum('margin')
)
return JsonResponse(settlements_orders[::1], safe=False)
I am using the Array to filter data When I make a GET request I am returned data but on a POST request, I get a 500 response. Any help would be appreciated.