Problem creating non-roa proxy models

[cript0nauta]

Hi, i'm trying to create a proxy for some ROA model that will use a normal manager insted of a ROAManager to make queries in a SQL database (i have read access only, that's why i use ROA). The problem is that i can't set the default manager correctly. This is part of my code:

class SomeROAModelProxy(SomeROAModel):
    class Meta(SomaROAModel.Meta):
        proxy = True
    objects = models.Manager()

and here is my problem:

>>> SomeROAModel._default_manager 
<django_roa.db.managers.ROAManager at 0x2470250>
>>> SomeROAModelProxy._default_manager
<django_roa.db.managers.ROAManager at 0x303d2d0>
>>> SomeROAModel._default_manager is SomeROAModelProxy._default_manager
False

The manager of SomeROAModelProxy shoud be a models.Manager instance. If I do the same with the User model for example, it works well:

class UserProxy(User):
    class Meta(User.Meta):
        proxy = True
    objects = models.Manager()

>>> User._default_manager
<django.contrib.auth.models.UserManager at 0x33ded50>
>>> UserProxy._default_manager
<django.db.models.manager.Manager at 0x3fbaa10>