SqlalchemyDataLayer fails on models with __init__ statement

[pysalt]

Sometimes in projects we use models with __init__ method. something like this:

class Cube(Model):
    x = Column()
    y = Column()
    z = Column()

    def __init__():
        self.x = 10
        self.y = 10

However, a resource with a post method will not work with this model. The create_object method throws a TypeError. This is due to such initialization of the model in this method:

obj = self.model(**{key: value
                            for (key, value) in data.items() if key not in join_fields})

That is, there is no validation of the arguments of the __init__ method.

I suggest using inspect.getfullargspec to determine that a model can only accept a limited list of arguments.