Django Model Inheritance - 实例属性设置不正确

Question

Alas, my code was working perfect until I decided to "fix" it using inheritance for linked classes.

I have a UserProgram class that inherits from Program and MyUser . When I changed the class definition to UserProgram(Program, MyUser) , I started getting strange behavior with my UserProgram.objects.get() call, which gets its data from a stored procedure via get_data_pk() :

raw('select 1 as id, * from SP_GetUserProgram(%s,%s,%s)', params)

After adding the inheritance, I see the new objects have all the inherited fields, but the attributes are not being assigned the correct values now. For instance, maxbudget and availablebudget should both be 400000 , but that is incorrectly assigned to uploaddirectoryid and is_active .

Creating the UserProgram objects manually via UserProgram(...) works fine, but not via the DB call anymore. I'm not sure what's going on. Any ideas? Here's a simplified version of my code.

models.py

class UserProgramManager(models.Manager):
    def get(self, userid, programname, schoolyear):
        return get_data_pk(self, 
          'SP_GetUserProgram(%s,%s,%s)', (userid, programname, schoolyear)
        )

class MyModel(models.Model):
    class Meta:
        managed = False
        abstract = True

class MyUser(AbstractBaseUser):
    userid = models.IntegerField(primary_key=True)
    objects = MyUserManager()

class Program(MyModel):
    programname = models.CharField(primary_key=True)
    schoolyear = models.SmallIntegerField()

    def __init__(self,schoolyear=None,programname=None,*args,**kwargs):
        super(Program, self).__init__(*args,**kwargs)

        self.schoolyear = schoolyear
        self.programname = programname

        # Do some extra processing (not included here)

class UserProgram(Program, MyUser):
    uploaddirectoryid = models.CharField(primary_key=True)
    objects = UserProgramManager()

test.py

# Works fine
myuserprogram = UserProgram(
  userid=17,
  schoolyear=2020,
  programname='incentive'
)

# Attributes are not set correctly
myuserprogram = UserProgram.objects.get(
  userid=17,
  schoolyear=2020,
  programname='incentive'
)

Answer 1

In the words of Homer Simpson: I am so smart. S...M...R...T.

It looks like my __init__ functions were causing the problems. I removed the named parameters and just left *args, **kwargs and it works fine:

def __init__(self,*args,**kwargs):
  super(Program, self).__init__(*args,**kwargs)