Flask REST API类型错误

Question

当我尝试在"寄存器"；POST-body raw｛"name"："mike"，"password"："demo"｝在poster中我得到了这个错误，请帮助更正：

第62行，在signup_user中hashed_password=generate_password_hash(data['password']，method='sa256'(类型错误：'NoneType'对象不是可下标的

from flask import Flask, request, jsonify, make_response
from flask_sqlalchemy import SQLAlchemy
from werkzeug.security import generate_password_hash, check_password_hash
import uuid
import jwt
import datetime
from functools import wraps
app = Flask(__name__)
app.config['SECRET_KEY'] = 'Th1s1ss3cr3t'
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///library.db'
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = True
db = SQLAlchemy(app)

class Users(db.Model):
id = db.Column(db.Integer, primary_key=True)
public_id = db.Column(db.Integer)
name = db.Column(db.String(50))
password = db.Column(db.String(50))
admin = db.Column(db.Boolean)

class Authors(db.Model):
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(50), unique=True, nullable=False)
book = db.Column(db.String(20), unique=True, nullable=False)
country = db.Column(db.String(50), nullable=False)
booker_prize = db.Column(db.Boolean)
user_id = db.Column(db.Integer)

def token_required(f):
@wraps(f)
def decorator(*args, **kwargs):
token = None
if 'x-access-tokens' in request.headers:
token = request.headers['x-access-tokens']
if not token:
return jsonify({'message': 'a valid token is missing'})
try:
data = jwt.decode(token, app.config[SECRET_KEY])
current_user = Users.query.filter_by(public_id=data['public_id']).first()
except:
return jsonify({'message': 'token is invalid'})
return f(current_user, *args, **kwargs)
return decorator

@app.route('/register', methods=['GET', 'POST'])
def signup_user():
data = request.get_json()
hashed_password = generate_password_hash(data['password'], method='sha256')
new_user = Users(public_id=str(uuid.uuid4()), name=data['name'], password=hashed_password, admin=False)
db.session.add(new_user)
db.session.commit()
return jsonify({'message': 'registered successfully'})

Answer 1

您的请求很可能缺少内容类型标头。

内容类型：application/json

在Postman中，您可以在Headers选项卡中设置它；生的"；以及"；JSON(application/JSON("；在文本区域上方的"正文"选项卡中。