flask：sqlalchemy.exc.ProgrammingError：（psycopg2.ProgrammingError）关系“用户”不存在

Question

作为tut的一部分，我试图连接到postgres服务器，其结构如屏幕截图所示。我添加了一个db“烧瓶”，您可以看到。

基于该tut，我的主文件（’routes.py’）中包含以下代码：

from flask.ext.sqlalchemy import SQLAlchemy

from flask import Flask

app = Flask(__name__)

app.config['SQLALCHEMY_DATABASE_URI'] = "postgresql://postgres:123@localhost/flask"

db = SQLAlchemy(app)
from models import User
# db.init_app(app)
db.create_all()
db.session.commit()


admin = User('admin', '[e-mail]', 'admin1', '[e-mail]')
guest = User('admi2', '[e-mail]', 'admin', '[e-mail]')
# guest = User('guest', '[e-mail]')
db.session.add(admin)
db.session.add(guest)
db.session.commit()

models.py：

from flask.ext.sqlalchemy import SQLAlchemy
from werkzeug import generate_password_hash, check_password_hash

db = SQLAlchemy()

class User(db.Model):
  __tablename__ = 'users'
  uid = db.Column(db.Integer, primary_key = True)
  firstname = db.Column(db.String(100))
  lastname = db.Column(db.String(100))
  email = db.Column(db.String(120), unique=True)
  pwdhash = db.Column(db.String(54))

  def __init__(self, firstname, lastname, email, password):
    self.firstname = firstname.title()
    self.lastname = lastname.title()
    self.email = email.lower()
    self.set_password(password)

  def set_password(self, password):
    self.pwdhash = generate_password_hash(password)

  def check_password(self, password):
    return check_password_hash(self.pwdhash, password)

运行时，调试器给出：

sqlalchemy.exc.ProgrammingError: (psycopg2.ProgrammingError) relation "users" does not exist
LINE 1: INSERT INTO users (firstname, lastname, email, pwdhash) VALU...
                    ^
 [SQL: 'INSERT INTO users (firstname, lastname, email, pwdhash) VALUES (%(firstname)s, %(lastname)s, %(email)s, %(pwdhash)s) RETURNING users.uid'] [parameters: {'lastname': '[e-mail]', 'firstname': 'Admin', 'pwdhash': 'pbkdf2:sha1:1000$eZvJNKHO$64f59c34364e3d6094d126fa3ca2b327ab39e302', 'email': 'admin1'}]

我究竟做错了什么？

Answer 1

从本质上讲，您将需要将其拆分为几个文件，以防止导入问题并使事情更加整洁。我已经完成了以下工作。注意，我已经使用了SQLite，因为我没有在此框中安装Postgres。

app.py

from flask import Flask
app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:////test11.db'

models.py

from flask.ext.sqlalchemy import SQLAlchemy
from app import app
db = SQLAlchemy(app)

class User(db.Model):
    __tablename__ = 'users'
    uid = db.Column(db.Integer, primary_key = True)
    firstname = db.Column(db.String(100))
    lastname = db.Column(db.String(100))
    email = db.Column(db.String(120), unique=True)
    pwdhash = db.Column(db.String(54))

def __init__(self, firstname, lastname, email, password):
    self.firstname = firstname.title()
    self.lastname = lastname.title()
    self.email = email.lower()
    self.set_password(password)

def set_password(self, password):
    self.pwdhash = (password)

def check_password(self, password):
    return password

route.py

from models import User, db

db.create_all()
db.session.commit()

admin = User('admin', '[e-mail]', 'admin1', '[e-mail]')
guest = User('admi2', '[e-mail]', 'admin', '[e-mail]')
db.session.add(admin)
db.session.add(guest)
db.session.commit()

我绝对建议查看一些教程！您将需要它：您应该了解Web漏洞，最佳实践等。