I have code that looks like this (.customers refers to a list of Django models named Customer): 

```
return bundle.request.user.id in bundle.obj.customers.all()

```

This doesn't work because it's checking an id against a list of Customer objects. I want something that offers similar optimized evaluation to Django's all() but will return true if one of the customers in the list has a matching id. Is there an elegant way to achieve this?