How can I check if a foreign key has an attribute on its model?-CodePudding

I have a model named Product

class Product(models.Model):
    order = models.ForeignKey(Order, on_delete=models.CASCADE)

I am at Product views.py, how can I check if an attribute exist in the 'Order' model?

What I'm trying to do is this ->

hasattr(Product, "order__name")

CodePudding user response：

You can check if the target model has a name attribute with:

hasattr(Product.order.field.related_model, 'name')

Here we thus access the ForeignKey, and obtain a reference to the model it targets, in this case the Order model, then we can check if that model has a name attribute.

It is rather odd that a Product however has a ForeignKey to an Order. Usually it is the other way around: an Order has many "OrderLine"s that then have a ForeignKey to the Product that these orderlines deal with.