Flask REST API TypeError - api

Question

When i try to use on "/register" POST-body-raw {"name" : "mike", "password" : "demo"} in postman i get this bug, pls help to correct:
line 62, in signup_user
hashed_password = generate_password_hash(data['password'], method='sha256') TypeError: 'NoneType' object is not subscriptable
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

Most likely your request is missing content-type header.
Content-Type:application/json
In Postman you can set it in Headers tab. Another option is to select "raw" and "JSON (application/json)" in Body tab just above the text area.