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2aa39f Niklas Polke 2026-08-08 21:02:12
Create DJANGO Session And Cache
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# DJANGO Session And Cache
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## Session settings
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`settings.py:`
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```python
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SESSION_COOKIE_AGE = 30 * 60 # Session time 30 minutes
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SESSION_SAVE_EVERY_REQUEST = True # Session time resets with every request
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SESSION_EXPIRE_AT_BROWSER_CLOSE = False # Session doesn't quit when browser clos
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```
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:::warning
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Session is stored per default in database - so a *SESSION_SAVE_EVERY_REQUEST* does a lot of additional database updates. Could be changed by using a cache like Redis
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:::
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## Using Cache
e43f24 Niklas Polke 2026-08-08 22:25:58
Update Redis Install Info
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### Installation
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```bash
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sudo apt redis-server
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sudo systemctl enable --now redis-server
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redis-cli ping
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```
24058b Niklas Polke 2026-08-08 23:18:30
Update Install Session And Cache
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in python env (.venv):
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```bash
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pip install redis
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```
e43f24 Niklas Polke 2026-08-08 22:25:58
Update Redis Install Info
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### Configuration
2aa39f Niklas Polke 2026-08-08 21:02:12
Create DJANGO Session And Cache
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`settings.py:`
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```python
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CACHES = {
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"default": {
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"BACKEND": "django.core.cache.backends.dummy.DummyCache",
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},
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"sessions": {
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"BACKEND": "django.core.cache.backends.redis.RedisCache",
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"LOCATION": "redis://127.0.0.1:6379/1",
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},
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}
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SESSION_ENGINE = "django.contrib.sessions.backends.cache"
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SESSION_CACHE_ALIAS = "sessions"
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```
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:::warning
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Because sessions are now only in the cache - a restart of the RedisCache would delete all sessions and everyone would get logged out immediately.
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:::
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### Using Cache and Database
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```python
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SESSION_ENGINE = "django.contrib.sessions.backends.cached_db"
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```
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- would write both to database and cache (so no help for the database)
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- only the reads would be buffered by the cache