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[英]Django multi-table inheritance, how to know which is the child class of a model?
[英]Access child model class attributes in multi table inheritance in Django
我试图遍历模板中子模型实例的属性,特别是我只想访问子属性。 在运行时,我不知道它是什么具体的子类。 使用django-model-utils
我已经能够返回子类而不是作为开始的父类,但是当我访问其属性时,我得到了返回的父代和子代:
class Product(models.Model):
created_at = models.DateTimeField(default=timezone.now)
updated_at = models.DateTimeField(auto_now=True)
name = models.CharField(...)
objects = InheritanceManager()
def attrs(self):
for attr, value in self.__dict__.iteritems():
yield attr, value
class Vacuum(Product):
power = models.DecimalField(...)
class Toaster(Product):
weight = models.DecimalField(...)
views.py
def product_detail(request, slug):
product = Product.objects.get_subclass(slug=slug)
模板
{% for name, value in product.attrs %}
<td>{{ name }}</td>
<td>{{ value }}</td>
{% endfor %}
你能做这样的事情:
def product_detail(request, slug):
product = Product.objects.get_subclass(slug=slug)
child_fields = [i for i in product.__class__.__dict__ if
not i.startswith("__") and not hasattr(Product, i)]
product_attrs = [(name, getattr(product,name)) for name in child_fields]
# pass product_attrs to your template
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