class NebizImportManufOrders(models.Model):
    _inherit = 'mrp.production'
    _name = 'mrp.production'
    erp7_id = fields.Integer("ERP7 ID", default=0)

    def get_rows_fromdb(self):
        db_vals = self.env['db.config'].get_db_config()
        if db_vals:
            table = 'mrp_production'
            limit = 9999
            import psycopg2
            conn = psycopg2.connect(database=db_vals['db_name'], user=db_vals['user'], password=db_vals['password'],
                                    host=db_vals['host'], port=db_vals['port'])
            if conn:
                cur = conn.cursor()
                # if limit is None:
                #     limit = 999999

                cur.execute("select row_to_json(%s) from %s limit %r;" % (table, table, limit))
                rows = cur.fetchall()
                cur.close()
                return rows