我正在遵循教程并使用下面的代码。我还使用 Postman 查看服务器的状态http://localhost:5000/行星 http://localhost:5000/planets,但我得到了500内部服务器错误,当我应该看到我创建的行星的 JSON 数据时。
在命令行中我还看到:AttributeError:“列表”对象没有属性“数据”
我觉得这可能与以下行有关: return jsonify(result.data) 但我不确定。
from flask import Flask, jsonify, request
from flask_sqlalchemy import SQLAlchemy
from sqlalchemy import Column, Integer, String, Float
import os
from flask_marshmallow import Marshmallow
from marshmallow import Schema
app = Flask(__name__)
basedir = os.path.abspath(os.path.dirname(__file__))
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///C:/Users/krist/Py3/flask2/planets.db'
db = SQLAlchemy(app)
ma = Marshmallow(app)
@app.cli.command('db_create')
def db_create():
db.create_all()
print("DB Created")
@app.cli.command('db_seed')
def deb_seed():
mercury = Planet(planet_name='Mercury',
planet_type='Class D',
home_star='Sol',
mass=3.25e23,
radius=1516,
distance=35.98e6)
venus = Planet(planet_name='Venus',
planet_type='Class K',
home_star='Sol',
mass=8.95e24,
radius=3516,
distance=67.98e6)
earth = Planet(planet_name='Earth',
planet_type='Class M',
home_star='Sol',
mass=5.97e24,
radius=3916,
distance=92.96e6)
db.session.add(mercury)
db.session.add(venus)
db.session.add(earth)
test_user = User(first_name='William',
last_name='Hershel',
email='[email protected] /cdn-cgi/l/email-protection',
password='p@ssw0rd')
db.session.add(test_user)
db.session.commit()
print("DB Seeded")
@app.route('/planets', methods=['GET'])
def planets():
planets_list = Planet.query.all()
result = planets_schema.dump(planets_list)
return jsonify(result.data)
class User(db.Model):
__tablename__ = 'users'
id = Column(Integer, primary_key=True)
first_name = Column(String)
last_name = Column(String)
email = Column(String, unique=True)
password = Column(String)
class Planet(db.Model):
__tablename__ = 'planets'
planet_id = Column(Integer, primary_key=True)
planet_name = Column(String)
planet_type = Column(String)
home_star = Column(String)
mass = Column(Float)
radius = Column(Float)
distance = Column(Float)
class UserSchema(ma.Schema):
class Meta:
fields = ('id', 'first_name', 'last_name', 'email', 'password')
class PlanetSchema(ma.Schema):
class Meta:
fields = ('planet_id', 'planet_name', 'planet_type', 'home_star', 'mass', 'radius', 'distance')
user_schema = UserSchema()
users_schema = UserSchema(many=True)
planet_schema = PlanetSchema()
planets_schema = PlanetSchema(many=True)
if __name__ == '__main__':
app.run()