Question

我想创建产品元素并重定向到他的页面

def newprodcreate(request, c_id):
if models.company.objects.get(email = request.user.username).id == int(c_id):
    name = request.POST['newprodname']
    comp = models.company.objects.get(id = int(c_id))
    prod = models.product()
    prod.name = name
    prod.comp_id = int(c_id)
    prod.address = comp.address
    prod.lat = comp.lat
    prod.lng = comp.lng
    prod.phone = comp.phone
    prod.cur_id = 2
    prod.save()
return HttpResponseRedirect("/p/" + str(prod.id))

在数据库中创建的元素，但prod.id为Null

模型：

class product(models.Model):
class Meta:
    db_table = "product"
id = models.IntegerField(primary_key=True)
crdate = models.DateTimeField(default = datetime.now())
comp_id = models.IntegerField()
categ = models.CharField(max_length=200, default="")
img = models.FileField(upload_to=MEDIA_ROOT +"/product/", max_length=200)
name = models.CharField(max_length=200)...

Answer 1

亲爱的michael在django ORM中用于创建用于id主键等的autho字段或串行字段，我们使用Autofield而不是整数字段。

id = models.AutoField(primary_key=True)

your model in corrected state:
class product(models.Model):
class Meta:
    db_table = "product"
id = models.AutoField(primary_key=True)
crdate = models.DateTimeField(default =
        datetime.now())
comp_id = models.IntegerField()
categ = models.CharField(max_length=200,     default="")
img =     models.FileField(upload_to=MEDIA_ROOT.    +"/product/", max_length=200)
name = models.CharField(max_length=200)...

Answer 2

对于django模型将有一个名为“id”的默认字段，它是自动增量字段。您已使用this

的

var numbers = ['1', 23, null, 46.5, '34e2', , false, 'true', , 40],
  divide = numbers.map(x => 'string' === typeof x && isFinite(x) ? x/10 : x);

console.log(divide);

覆盖该ID

因此，每次创建IntegerField

时，您都必须明确提供id = models.IntegerField(primary_key=True)

更好的解决方案是将id product object更改为id

IntegerField

然后，您的ID将自动创建，无需在每次创建新对象时传递id。

Django Nonetype对象没有属性'id'

2 个答案: