[Fixed]-Django Exception : AppRegistryNotReady("Models aren't loaded yet.")

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AbstractBaseUser provides a get_username() method which you can use instead. It practically does the same as what you’re doing: return getattr(self, self.USERNAME_FIELD).

class File(models.Model):
    ...
    def clean(self):
        #Check if path has a trailing '/'
        if self.path[-1]!='/':
            self.path = self.path+"/"
        if self.filename[0]=='/':
            self.filename = self.filename[1:]

        #Get the full path
        username = self.user.get_username()
        self.path = "tau/"+username+"/"+self.path

The reason your original method failed is because get_user_model() is executed when the module is first imported, at which time the app registry is not fully initialized. If you need to use get_user_model() in a models.py file, you should call it within a function or method, not at the module level:

class File(models.Model):
    ...
    def clean(self):
        User = get_user_model()
👤knbk

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