none none on Django - html

Question

I'm trying to get the id of another class using the filter and I'm not getting it because None appears.
This is the method used:
def total(self):
soma = Venda.objects.filter(id=self.id).aggregate(total=Sum('item__qtde', flat = True))
return soma['total']
result
Below the complete class:
class Venda(models.Model):
id = models.AutoField(u'AÇAIEX', primary_key=True)
hora_saida = models.TimeField(max_length=6)
responsavel_frete = models.CharField(max_length=14, verbose_name=u'Resp. Frete', choices = RESPONSAVEL_FRETE, default='REMETENTE')
empresa = models.ForeignKey(Empresa, on_delete=models.CASCADE)
localidade_origem = models.ForeignKey(Localidade, on_delete=models.CASCADE, verbose_name=u'Loc. Origem', related_name ='localidade_origem')
localidade_destino = models.ForeignKey(Localidade, on_delete=models.CASCADE, verbose_name=u'Loc. Destino', related_name ='localidade_destino')
cliente_origem = models.ForeignKey(Cliente, on_delete=models.CASCADE, related_name ='cliente_origem')
cliente_destino = models.ForeignKey(Cliente, on_delete=models.CASCADE, related_name ='cliente_destino')
carro = models.ForeignKey(Carro, on_delete=models.CASCADE)
motorista_principal = models.ForeignKey(Motorista, on_delete=models.CASCADE, related_name ='motorista_principal')
motorista_reserva = models.ForeignKey(Motorista, on_delete=models.CASCADE , related_name ='motorista_reserva', null=True, blank=True)
#valores default
data_venda = models.DateField(auto_now_add=True, verbose_name=u'Data',)
situacao_venda = models.CharField(max_length=10, verbose_name=u'Situação', choices = SITUACAO_VENDA, default='ATIVA')
#aba de valores teste
tipo_frete = models.CharField(max_length=10, choices = TIPO_FRETE, default='PAGO')
dinheiro = models.BooleanField()
cartao = models.BooleanField()
cartoes = models.CharField(max_length=30, choices = CARTOES, default='DINNER CLUBS', null=True, blank=True)
ano_processo = models.CharField(max_length=4, choices = CARTOES, default='VISA', null=True, blank=True)
#valor_nota = models.DecimalField(verbose_name=u'Valor Nota',
# max_digits=15, decimal_places=2, null=True, blank=True)
valor_dinheiro = models.DecimalField(verbose_name=u'Valor Dinheiro',
max_digits=15, decimal_places=2, default=Decimal('0.00'))
valor_cartao = models.DecimalField(verbose_name=u'Valor Cartão',
max_digits=15, decimal_places=2, default=Decimal('0.00'))
usuario = models.ForeignKey(User, on_delete=models.CASCADE)
agencia = models.ForeignKey(Group, on_delete=models.CASCADE, null=True, blank=True)
#produto = models.ManyToManyField(Produto, blank=False, default=None)
#staticmethod
#def autocomplete_search_fields():
# return id,
#staticmethod
def autocomplete_search_fields():
return 'id',
def __str__(self):
return str(self.id)
def imprimir(self):
return mark_safe("<a target='_blank' href='%s'>Imprimir</a>" % self.get_absolute_url())
imprimir.allow_tags = True
def get_absolute_url(self):
return reverse('venda_detail', args=[self.pk, ])
def get_venda(self):
return Venda.objects.get(pk=self.pk)
#soma o total de volume no relatorio
def total(self):
soma = Venda.objects.filter(id=self.id).aggregate(total=Sum('item__qtde', flat = True))
return soma['total']
def valortotal(self):
soma = Venda.objects.filter(id=self.id).aggregate(valortotal=Sum(F('item__produto__valor') * F('item__qtde'), output_field=FloatField()))
return soma['valortotal']
def valortotalnota(self):
return self.valor_nota
def valor_nota(self, force_insert=False, force_update=False):
valor_nota = self.valor_dinheiro + self.valor_cartao
return valor_nota
def desconto(self):
valortotal = Venda.objects.filter(id=self.id).aggregate(valortotal=Sum(F('item__produto__valor') * F('item__qtde'), output_field=FloatField()))
valor_nota = self.valor_nota
# exemplo de porcetagem return 100 - float(valor_nota.replace(",",".")) * 100 / float(valortotal['valortotal'])
if self.tipo_frete == 'CORTESIA':
return 0.00
else:
return Decimal(valortotal['valortotal']) - valor_nota()
#return valor_nota()
#return float(valortotal['valortotal'])
def clean(self, *args, **kwargs):
valortotal = Venda.objects.filter(id=self.id).aggregate(valortotal=Sum(F('item__produto__valor') * F('item__qtde'), output_field=FloatField()))
valor_nota = self.valor_nota
# if Decimal(valortotal['valortotal']) < valor_nota():
# raise forms.ValidationError("O valor do Tipo de Pagamento (dinheiro + cartão) não pode ser maior que o valor total da nota.")
class Item(models.Model):
produto = models.ForeignKey(Produto, on_delete=models.CASCADE, default=None)
qtde = models.PositiveIntegerField(null=True, blank=False)
venda = models.ForeignKey(Venda, on_delete=models.CASCADE, default=None)
class Manifesto(models.Model):
data_venda = models.DateField(default=timezone.now)
carro = models.ForeignKey(Carro, on_delete=models.CASCADE)
usuario = models.ForeignKey(User, on_delete=models.CASCADE)
def imprimir(self):
return mark_safe("<a target='_blank' href='%s'>Imprimir</a>" % self.get_absolute_url())
imprimir.allow_tags = True
def get_absolute_url(self):
return reverse('manifesto_detail', args=[self.pk, ])
#sem essa função não aparece as variaveis
def get_manifesto(self):
return Manifesto.objects.get(pk=self.pk)
def total(self):
soma = Venda.objects.filter(id=self.id).aggregate(total=Sum('item__qtde', flat = True))
return soma['total']

Answer 1

#Jallisson I don't see you Venda Model, but I think in your Sum() flat=True does not exist. Plus what is qtde?
If you just do Sum('item') instead of Sum('item__qtde') it might work.
one weird thing i see is:
def total(self):
soma = Venda.objects.filter(id=self.id).aggregate(total=Sum('item__qtde', flat = True))
return soma['total']
def total is inside the class Manifesto
But in you def total function you do self.id but self.id is the Id of the Manifesto class so this will never match because it is an id from a different model