Question

我正在使用Flask构建Web的api 我已经有一个数据库，并且GET请求有效，但是当我尝试POST时，它给了我这个错误

500内部服务器错误

这是我写的代码

#User_schema
class UserSchema(ma.Schema):
 class Mata:
  fields = ('id', 'name', 'Email', 'Pass', 'Phone', 'Department', 'Major')

#init_schema
user_schema = UserSchema()
users_schema = UserSchema(many=True)

#create user
@app.route('/user', methods=['POST'])
def add_User():
 #id = request.json['id']
 name = request.json['name']
 Email = request.json['Email']
 Pass = request.json['Pass']
 #Phone = request.json['Phone']
 Department = request.json['Department']
 Major = request.json['Major']

 new_user = User(name, Email, Pass, Department, Major)
 db.session.add(new_user)
 db.session.commit()

 return user_schema.jsonify(new_user)

这是我在邮递员身上添加的请求

{
    "name": "User 1",
    "Email": "User1@.com",
    "Pass": "qq1",
    "Phone": "0551",
    "Department": "IT 1",
    "Major": "IT 1"
}

我也在使用本地服务器我查看了其他链接，每个人都在询问日志，如果我没记错的话，我想我可以从中获取日志

查看>开发人员>显示DevTools>控制台

这是日志的屏幕截图：（我认为）

这里到底是什么问题我不明白

编辑：这是完整的代码：

from flask import Flask, request, jsonify
from flask_sqlalchemy import SQLAlchemy
from flask_marshmallow import Marshmallow
import os

app = Flask(__name__)
basedir = os.path.abspath(os.path.dirname(__file__))
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///db.db'
app.config['SQLALCHEMY_TRACK_MODIFICATION'] = False
db = SQLAlchemy(app)
ma = Marshmallow(app)

class User (db.Model):
 id = db.Column(db.Integer,primary_key=True)
 name = db.Column(db.String(30))
 Email = db.Column(db.String(30))
 Pass = db.Column(db.String(30))
 Phone = db.Column(db.Integer)
 Department = db.Column(db.String(30))
 Major = db.Column(db.String(30))
 meeting = db.relationship('Meeting', backref='creator')
 meetingroom = db.relationship('MeetingRoom', backref='reserver')

    def _init_(self, name, Email, Pass, Phone, Department, Major):
  self.name = name
  self.Email = Email
  self.Pass = Pass
  self.Phone = Phone
  self.Department = Department
  self.Major = Major

class MeetingRoom (db.Model):
 mrid = db.Column(db.Integer,primary_key=True)
 reserver_id = db.Column(db.Integer, db.ForeignKey('user.id'))
 #meetingm = db.relationship('Meeting', backref='roomno')
 mid = db.Column(db.Integer, db.ForeignKey('meeting.Mid'))

class Meeting (db.Model):
 Mid = db.Column(db.Integer,primary_key=True)
 Mname = db.Column(db.String(100))
 Des = db.Column(db.String(100))
 Date = db.Column(db.String(20))
 creator_id = db.Column(db.Integer, db.ForeignKey('user.id'))
 meetingroomm = db.relationship('MeetingRoom', backref='mroom')
 #roomno_id = db.Column(db.Integer, db.ForeignKey('meetingroom.mrid')


##json 
@app.route('/users', methods=['GET'])
def getuser():
 users = User.query.all()
 output = []
 for user in users:
  user_data = {}
  user_data['id'] = user.id
  user_data['name'] = user.name
  user_data['Email'] = user.Email
  user_data['Pass'] = user.Pass
  user_data['Phone'] = user.Phone
  user_data['Department'] = user.Department
  user_data['Major'] = user.Major
  output.append(user_data)
 return jsonify({'users' : output})


#User_schema
class UserSchema(ma.Schema):
 class Mata:
  fields = ('id', 'name', 'Email', 'Pass', 'Phone', 'Department', 'Major')

#init_schema
user_schema = UserSchema()
users_schema = UserSchema(many=True)

#create user
@app.route('/user', methods=['POST'])
def add_User():
 #id = request.json['id']
 name = request.json['name']
 Email = request.json['Email']
 Pass = request.json['Pass']
 #Phone = request.json['Phone']
 Department = request.json['Department']
 Major = request.json['Major']

 new_user = User(name, Email, Pass, Department, Major)
 db.session.add(new_user)
 db.session.commit()

 return user_schema.jsonify(new_user)

#meeting_schema
class MeetingSchema(ma.Schema):
 class Mata:
  fields = ('Mid', 'Mname', 'Des', 'Date', 'creator_id')

#init_schema
meeting_schema = MeetingSchema()
meetings_schema = MeetingSchema(many=True)

#create meeting
@app.route('/meeting', methods=['POST'])
def add_meeting():
 Mname = request.json['Mname']
 Des = request.json['Des']
 Date = request.json['Date']


 new_meeting = Meeting(Mname, Des, Date)
 db.session.add(new_meeting)
 db.session.commit()

 return user_schema.jsonify(new_meeting)


if __name__ == '__main__':
 app.run(debug=True)

2nd EDIT: the console log

添加def错误后：

cursor.execute(statement, parameters)
sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) database is locked
[SQL: INSERT INTO user (name, "Email", "Pass", "Phone", "Department", "Major") VALUES (?, ?, ?, ?, ?, ?)]
[parameters: ('User 1', 'User1@.com', 'qq1', '0551', 'IT 1', 'IT 1')]
(Background on this error at: http://sqlalche.me/e/e3q8)

Answer 1

如控制台中所示，问题是您正在使用构造函数初始化User对象，但是在User类中尚未定义任何构造函数。

定义这样的构造函数

class User(db.Model): ... 
....
   def __init__(self, username, email):
      self.username = username
      self.email = email
      # all your attributes

Answer 2

该错误可能是由于 Flask 的旧版本造成的，因此请尝试通过升级 Flask 版本来解决。

打开 Anaconda Prompt 并输入

pip install --upgrade Flask

然后重新启动您的 IDE

Postman 500内部服务器错误api中的错误

2 个答案: