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I have a class called BankAccount as base class. I also have CheckingAccount and SavingsAccount classes that inherit from BankAccount.
BankAccount is not an abstract class but I do not create an object from it, only the inheriting classes.
Then, I execute a query like this:
account = BankAccount.objects.get(id=10)
How do I know if account is CheckingAccount or SavingsAccount?
The way I do this now is in this way:
checking_account = CheckingAccount.objects.get(id=account.id)
If it exists, it is a CheckingAccount, otherwise, it is a SavingsAccount.
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Python issubclass() is built-in function used to check if a class is a subclass of another class or not. This function returns True if the given class is the subclass of given class else it returns False .
The isinstance() method checks whether an object is an instance of a class whereas issubclass() method asks whether one class is a subclass of another class (or other classes).
The basics: Each model is a Python class that subclasses django. db. models.
The two main concepts of OOP are classes and objects: Class: Class is basically a blueprint or a template for creating objects. Object: Collection of arguments and methods which can be performed on those data. An object is nothing but an instance of the class.
Try to use the checkingaccount and savingsaccount attributes. The one it is will not blow up.
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