Question

我使用了this文档作为指南。但是设置完

url = 'postgresql://{0}:{1}@{2}/{3}'.format(database_settings['user'], database_settings['password'], database_settings['host'], database_settings['dbname'])
app.config['SQLALCHEMY_DATABASE_URI'] = url
app.config['SESSION_TYPE'] = 'sqlalchemy'

我遇到一个错误：

sqlalchemy.exc.ProgrammingError: (psycopg2.ProgrammingError) relation "sessions" does not exist
LINE 2: FROM sessions

因此，我通过手工编码（psql）创建了表。但这并没有任何改变。我确定麻烦在于定义架构，但是我找不到任何使之起作用的方法。（使用flask + sqlalchemy很难设置模式（不是为模型，而是为应用程序））。我试图用架构创建orm.session，但这没有帮助。在这一刻，我仍然看到那麻烦。烧瓶会议成功发送请求以检查数据库中的session_id，但找不到表会话...

完整错误：

sqlalchemy.exc.ProgrammingError: (psycopg2.ProgrammingError) relation "sessions" does not exist
LINE 2: FROM sessions 
             ^
     [SQL: 'SELECT sessions.id AS sessions_id, sessions.session_id AS sessions_session_id, sessions.data AS sessions_data, sessions.expiry AS sessions_expiry \nFROM sessions \nWHERE sessions.session_id = %(session_id_1)s \n LIMIT %(param_1)s'] [parameters: {'param_1': 1, 'session_id_1': 'session:2d3cfe3f-acd9-42e8-998d-aa7111704db3'}]

init_app.py：

from flask import Flask
from flask_session import Session
from flask_sqlalchemy import SQLAlchemy

from dev.config import database_settings


class AppObjectsInit(object):
    _instance = None

    def __new__(cls):
        if not isinstance(cls._instance, cls):
            cls._instance = object.__new__(cls)
            cls._instance.__init_app()
        return cls._instance

    def __init__(self):
        pass

    def __init_app(self):
        self.__app = Flask(__name__)
        url = 'postgresql://{0}:{1}@{2}/{3}'.format(database_settings['user'], database_settings['password'], database_settings['host'], database_settings['dbname'])
        self.__app.config['SQLALCHEMY_DATABASE_URI'] = url
        self.__app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
        self.__db = SQLAlchemy(self.__app)
        self.__app.config['SESSION_TYPE'] = 'sqlalchemy'
        Session(self.__app)

我的应用程序可以与架构中的其他表正常工作。但是我为每个模型设置

__table_args__ = {'schema': 'my_schema'}

如何使用Flask-Session？可能那里的架构定义麻烦

0 个答案: