flask-jwt-extended TypeError：“函数”类型的对象不是 JSON 可序列化的

Posted 2023-03-10

【中文标题】flask-jwt-extended TypeError：“函数”类型的对象不是 JSON 可序列化的

【英文标题】：flask-jwt-extended TypeError: Object of type 'function' is not JSON serializable

【发布时间】：2019-10-27 17:28:36

【问题描述】：

我正在尝试使用 flask_sqlalchemy 和 flask_jwt_extended,marshmallow 对烧瓶进行 API jwt 验证以验证输入数据 获取token的登录路径：

from flask import Flask,request,jsonify, abort
from flask_sqlalchemy import SQLAlchemy
from flask_marshmallow import Marshmallow
from models import Book, Publisher, User
from crud import session
from config import DATABASE_URL
from marshmallow import Schema, fields, validates, ValidationError
from marshmallow.validate import Length, Range
from flask_jwt_extended import (
    JWTManager, jwt_required, create_access_token,
    get_jwt_identity
)
import os
app = Flask(__name__)
app.config['JWT_SECRET_KEY'] = '1234'
jwt = JWTManager(app)
basedir = os.path.abspath(os.path.dirname(__file__))
app.config['SQLALCHEMY_DATABASE_URI'] = DATABASE_URL
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
#init db
db = SQLAlchemy(app)
#init ma
ma = Marshmallow(app)
@app.route('/login', methods=['POST'])
def login():
  if not request.is_json:
    return jsonify("msg": "Missing JSON in request"), 400
  username = request.json['username']
  password = request.json['password']
  if not username:
    return jsonify("msg": "Missing username"), 400
  if not password:
    return jsonify("msg": "Missing password"), 400
  if not db.session.query(User).filter(User.username == username, User.password == password).first():
    return jsonify("msg": "Wrong username or password"), 401
  access_token = create_access_token(identity=username)
  return jsonify(access_token=create_access_token), 200
#protected route 
@app.route('/book', methods=['POST'])
@jwt_required
def add_book():
  id = request.json['id']
  title = request.json['title']
  author = request.json['author']
  publisher_id = request.json['publisher_id']
  price = request.json['price']
  pages = request.json['pages']
  published = request.json['published']
  errors = create_book_schema.validate(request.get_json())
  if errors:
    return jsonify(msg=errors), 400
  new_book = Book(id=id,title=title,author=author,publisher_id=publisher_id,price=price,pages=pages,published=published)
  db.session.add(new_book)
  db.session.commit()
  return jsonify(msg='book successfully created', book_id=new_book.id), 200

当我通过邮递员在“/login”路径发送 json 输入以获取令牌时，我收到此错误返回：

TypeError：“函数”类型的对象不是 JSON 可序列化的

我做错了什么？谢谢

编辑 这里输入的json和我的数据库一样

    "username": "linh",
    "password": "123"

【参考方案1】：

您需要返回一个可序列化的对象，jsonify 才能工作：

return jsonify(dict(access_token=access_token)), 200

你已经在一个变量中定义了你的access_token，你可以在字典中返回它。