我有另一个Django/python问题。我有一个models.py,看起来像这样。关于查询集的Django问题
class Client(models.Model):
client_number = models.PositiveIntegerField()
name = models.CharField(max_length=80)
address = models.CharField(max_length=250)
telephone = models.CharField(max_length=20)
fax = models.CharField(max_length=20)
email = models.EmailField()
alternative_name = models.CharField(max_length=80, blank=True, null=True)
alternative_address = models.CharField(max_length=250, blank=True, null=True)
alternative_telephone = models.CharField(max_length=20, blank=True, null=True)
alternative_email = models.EmailField(blank=True, null=True)
def __unicode__(self):
return unicode(self.client_number)
class Contract(models.Model):
client_number = models.ForeignKey(Client)
client_contract_number = models.PositiveIntegerField()
start_date = models.DateField()
end_date = models.DateField()
contract_type = models.IntegerField(verbose_name = "Contract Types", choices = CONTRACT_TYPE_CHOICES)
contract_status =models.IntegerField(verbose_name = "Contract Status", choices = CONTRACT_STATUS_CHOICES)
exception = models.DecimalField(max_digits=5, decimal_places=2)
uplift_percentage = models.DecimalField(max_digits=5, decimal_places=2)
payment_day = models.DateField()
payment_type = models.IntegerField(verbose_name = "Payment Type", choices = PAYMENT_TYPE_CHOICES)
late_payment = models.IntegerField(verbose_name = "Late Payment Change", choices = LATE_PAYMENT_CHOICES)
late_payment_change_rate = models.DecimalField(max_digits=5, decimal_places=2)
contract_value = models.DecimalField(max_digits=20, decimal_places=2)
monthly_value = models.DecimalField(max_digits=20, decimal_places=2)
def __unicode__(self):
return unicode (self.client_contract_number)
class Invoice(models.Model):
transaction_type = models.IntegerField(verbose_name = "Transaction type", choices = TRANSACTION_TYPE_CHOICES)
invoice_number = models.CharField(max_length=16)
date = models.DateField()
client_contract_number = models.ForeignKey(Contract)
invoice_contact = models.CharField(max_length=80)
invoice_net = models.DecimalField(max_digits=16, decimal_places=2)
invoice_vat = models.DecimalField(max_digits=16, decimal_places=2)
invoice_gross = models.DecimalField(max_digits=16, decimal_places=2)
payment_date = models.DateField()
special_notes = models.CharField(max_length=128)
def __unicode__(self):
return self.invoice_number
我知道在Django,如果我找{{invoices.client_contract_number }}
,我得到了客户的合同编号。但假设我想知道某个特定的发票,我将如何查看客户名称是?我无法{{invoice.name}},因为发票中的客户端没有任何foregin键值。
编辑: 这是我的观点
@login_required
def homepage(request):
invoices_list = Invoice.objects.all()
invoice_name = invoices_list.client_contract_number.client_number.name
return render_to_response(('index.html', locals()), {'invoices_list': invoices_list }, context_instance=RequestContext(request))
和错误。
'QuerySet' object has no attribute 'client_contract_number'
'client_contract_number'对我来说看起来像一个数字。 'client_number'不会。 – 2011-01-05 10:46:10
@Dominic Roger:有两个字段叫'client_contract_number'。 “Invoice”模型中的一个是ForeignKey,“Contract”中的是一个整数。 – 2011-01-05 10:49:46
我想我以前尝试过这样的东西,但它没有奏效。我认为这是我在views.py中写的。我的观点需要什么? – Shehzad009 2011-01-05 10:53:56