Dynamically adding/registiring models to the admin panel

[beng]

I'm able to generate models on the fly based on the parameters in my request, but I'm running into issues registering the newly created model with the admin panel; mainly because the admin is instantiated at the start of the web-server, and the models are generated on a request-by-request basis.

Below is the code I'm using to generate the models on the fly:

def create_model(name, fields=None, module='', admin_opts=None):
    class GenericModel(db.Model):
        pass

    class Admin(ModelAdmin):
        pass

    attrs = {'__module__': module, 'GenericModel': GenericModel}

    legal_types = {
        'CharField': CharField
    }

    # just for testing; peewee requires a primary key
    IntegerField(primary_key=True).add_to_class(db.Model, 'id')

    if fields:
        for idx, pg_info in fields.items():
            field_type = legal_types[pg_info['field_type']]
            field_name = pg_info['field_name']
            field_type().add_to_class(db.Model, field_name)

    model = type(name, (db.Model,), attrs)
    model.create_table(fail_silently=True)

    for k, v in admin_opts.items():
        setattr(Admin, k, v)

    admin.register(model, Admin)

    return model

The error I'm getting is

werkzeug.routing.BuildError 
BuildError: ('admin.<class name here>_index', {}, None)

I made sure that admin._registry contains my newly created model.__class__ and Admin.__class__ as a (key, value) pair. Any ideas on how to go about this or what I need to modify to get this to work? Ideally, I want to see the models that are created on-the-fly reflected in my admin panel.

Thanks.

[coleifer]

Will look into a fix.