<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def insert(self):
 """persist the .fields"""

        self.default_val = 0
        #fields = self.fields
        #fields = self.orm_class.depart(self.fields, is_update=False)
        #self.set_fields(fields)
        return self.interface.insert(
            self.schema,
            self.fields
        )

        return self.interface.insert(self.schema, self.fields)