扩展数据库支持的会话引擎 [英] Extending database-backed session engines

问题描述

我计划通过添加一个account_id扩展默认的会话存储，为此，我点击了此链接

I plan to extend the default sessionstore by adding an account_id, for this I followed this link extending-database-backed-session-engines, but the account_id is not being created on migrate.

该应用程序位于 app 文件夹中.

The application is located in app folder.

在 ./settings.py 中.我有:

    INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'app'
)

根据此链接扩展会话中间件我有:

SESSION_ENGINE='app.sessions'

在 ./sessions.py 中.我有:

from django.contrib.sessions.backends.db import SessionStore as DBStore
from django.contrib.sessions.base_session import AbstractBaseSession

from django.db import models


class SessionStore(DBStore):
    @classmethod
    def get_model_class(cls):
        return CustomSession

    def create_model_instance(self, data):
        obj = super(SessionStore, self).create_model_instance(data)
        try:
            account_id = int(data.get('_auth_user_id'))
        except (ValueError, TypeError):
            account_id = None
        obj.account_id = account_id
        return obj


class CustomSession(AbstractBaseSession):
    account_id = models.IntegerField(null=True, db_index=True)

    class Meta:
        app_label = 'sessions'

    @classmethod
    def get_session_store_class(cls):
        return SessionStore

编辑:使用此配置，不会创建会话表.

With this configuration the sessions table is not created.

我还尝试将 sessions.py 文件添加到 sessions 模块中，并将 app.sessions 添加到 settings 中的> installed_apps 部分，结果相同.

I also tried to to add the sessions.py file in a sessions module, and to add app.sessions to the installed_apps section in settings, the same result.

我还需要修改迁移文件来创建Session表吗?

Do I also need to modify the migrations file to create the Session table ?

我已经解决了这个问题.解决方案是:

I've solved the issue. The solution is:

1. 在 settings.py 中更改 INSTALLED_APPS 如下:

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'app'
]

按如下所示在settings.py中更改 SESSION_ENGINE :

SESSION_ENGINE='app.sessions'

在 ./app/sessions.py 中，我有:

from django.contrib.sessions.backends.db import SessionStore as DBStore
import app

class SessionStore(DBStore):
    @classmethod
    def get_model_class(cls):
        return app.models.models.CustomSession

    def create_model_instance(self, data):
        obj = super(SessionStore, self).create_model_instance(data)
        try:
            user_id = int(data.get('_auth_user_id'))
        except (ValueError, TypeError):
            user_id = None
        obj.user_id = user_id
        return obj

在 ./app/models/models.py 中，我有

from django.contrib.auth.models import User
from django.contrib.sessions.base_session import AbstractBaseSession
from django.db import models

from app.mysessions import SessionStore


class CustomSession(AbstractBaseSession):
    user_id = models.IntegerField(null=True, db_index=True)

    class Meta:
        app_label = 'app'

    @classmethod
    def get_session_store_class(cls):
        return SessionStore

常规makemigrations和迁移.一切都应该在运行.

Regular makemigrations and migrate. And all should be running.

推荐答案

如果您的应用程序具有自定义会话模型，则应将其包含在 INSTALLED_APPS 中，而不要包含在 django.contrib中.sessions .

If you have an app with a custom session model, you should include this in your INSTALLED_APPS instead of django.contrib.sessions.

拥有

SESSION_ENGINE='app.sessions'

在我看来错了. SESSION_ENGINE 应该是您的 AbstractBaseSession 子类的路径.

looks wrong to me. SESSION_ENGINE should be the path to your AbstractBaseSession subclass.

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