how to show manytomany field data in json format - django - json

Question

I'm trying to show manytomany data in json format(without using serializer), here is my models.py
class CustomerInvoice(models.Model):
customer = models.CharField(max_length=50)
items_model = models.ManyToManyField(Item,through='InvoiceItem')
created_at = models.DateTimeField(auto_now_add=True)
class InvoiceItem(models.Model):
item = models.ForeignKey(Item,on_delete=models.CASCADE)
invoice = models.ForeignKey(CustomerInvoice,on_delete=models.CASCADE,related_name='invoice')
quantity = models.IntegerField()
price = models.DecimalField(max_digits=20,decimal_places=2)
is it possible to make a look up base on many to many data?
something like this : Q(items_model__icontains=query_search) ,and also how to return the M2M data into a json format using values() and json.dumps please? this returns the ID Values('items_model') and this dont work Values('items_model__all')
and here is my views.py
def invoices_all_lists(request):
if request.is_ajax():
query_search = request.GET.get('filter')
if query_search:
all_item_qs = CustomerInvoice.objects.all()
a = []
for i in all_item_qs.items_model.all():
a.append(i.item.name)
invoices = CustomerInvoice.objects.annotate(
total=Sum((F('invoice__quantity') * F('invoice__price')),output_field=DecimalField(decimal_places=2,max_digits=20))
).filter(
Q(id__icontains=query_search) | Q(seller__username__icontains=query_search) |
Q(customer__icontains=query_search)).values(
'id','seller__username','customer','total','created_at','items_model').order_by('-id')
else:
all_item_qs = CustomerInvoice.objects.all()
a = []
for data in all_item_qs:
for i in data.items_model.all():
a.append(i.item.name)
invoices = CustomerInvoice.objects.annotate(
total=Sum((F('invoice__quantity') * F('invoice__price')) ,output_field=DecimalField(decimal_places=2,max_digits=20))
).values(
'id','seller__username','customer','total','created_at','items_model').order_by('-id')
start_from = 0
if request.GET.get('start'):
start_from = int(request.GET.get('start'))
limit = 10
if request.GET.get('limit'):
limit = int(request.GET.get('limit'))
data_lists = []
for index,value in enumerate(invoices[start_from:start_from+limit],start_from):
value['counter'] = index+1
data_lists.append(value)
data = {
'objects':data_lists,
'length':invoices.count(),
}
return HttpResponse(json.dumps(data, indent=4, sort_keys=True, default=str),'application/json')
else:
return redirect('invoiceapp:list-all-invoice')
can i add this part of the code into the query please?
a = []
for data in all_item_qs:
for i in data.items_model.all():
a.append(i.item.name)
note : i've used datatable server side in the client side