Python JSON序列化程序的StatementError
这里我有一些简单的RESTAPI端点,用于创建具有以下模型的乘客对象Python JSON序列化程序的StatementError,python,flask,flask-sqlalchemy,flask-restful,Python,Flask,Flask Sqlalchemy,Flask Restful,这里我有一些简单的RESTAPI端点,用于创建具有以下模型的乘客对象 class PassengerModel(db.Model): __tablename__ = 'passenger' ps_id = db.Column(db.Integer, primary_key=True, autoincrement=True) ps_token_id = db.Column(db.String(120),unique=True, nullable
class PassengerModel(db.Model):
__tablename__ = 'passenger'
ps_id = db.Column(db.Integer, primary_key=True, autoincrement=True)
ps_token_id = db.Column(db.String(120),unique=True, nullable=False)
passenger_name = db.Column(db.String(50),unique=True, nullable=False)
passenger_email= db.Column(db.String(120),unique=True, nullable=False)
prof_pic = db.Column(db.String(120),unique=True, nullable=False)
is_ontrip = db.Column(db.Boolean, nullable=True)
created = db.Column(db.DateTime, default=datetime.datetime.utcnow,nullable=True)
updated = db.Column(db.DateTime,nullable=True)
resource.py看起来像这样
passenger_parser = reqparse.RequestParser()
passenger_parser.add_argument('ps_token_id')
passenger_parser.add_argument('passenger_name')
passenger_parser.add_argument('passenger_email')
passenger_parser.add_argument('prof_pic')
passenger_parser.add_argument('is_ontrip')
passenger_parser.add_argument('created')
passenger_parser.add_argument('updated')
class PassengerRegistration(Resource):
def post(self):
data = passenger_parser.parse_args()
if PassengerModel.find_by_email(data['passenger_email']):
return {'message': 'User {} already exists'.format(data['passenger_name'])}
new_passenger = PassengerModel(
ps_token_id = data['ps_token_id'],
passenger_name = data['passenger_name'],
passenger_email = data['passenger_email'],
prof_pic = data['prof_pic'],
is_ontrip = data['is_ontrip']
)
try:
new_passenger.save_to_db()
return {'message': 'passenger {} created'.format(data['passenger_name'])}
except Exception as e:
return {'message': 'Something went wrong', 'error': e}, 500
有一次我试图用一个邮递员创建一个新的乘客对象,错误如下
{
"ps_token_id":"1@asdsd",
"passenger_name":"vAAaA",
"passenger_email":"vAasd@g.com",
"prof_pic":"asdasdv",
"is_ontrip":"False"
}
它返回这个错误
TypeError:StatementError类型的对象不可JSON序列化
对于is\u ontrip,我尝试了0和1,true,false加大括号和不加大括号。每次都会出现上述错误
我做错了什么?当您将new\u passenger.save\u调用到\u db时,出现了一些问题,这导致了SqlAlchemy 无法将其序列化为JSON,因此需要提供可序列化类型,例如字符串:
... 'error': str(e)}, 500
或者,要访问StatementError特定属性,请添加一个单独的属性,除非:
...
except StatementError as se:
return {'message': 'DB error', 'error': str(se), 'statement': se.statement}, 500