Flask Session will not Persist

Question

I have recently deployed my first Flask application (first web application ever actually), one problem I am running into and haven't had luck tracking down is related to sessions.

What I am doing is when the user logs in I set session['user'] = user_id and what is happening is I occasionally get a key error when making a request involving that session key. If I try to make the request again the session key is there and the request works fine. I have done research and set the app.config['SERVER_NAME'] to my domain and made sure the secret_key was static, it was dynamic before.

This does not happen when on my local development server so I am a bit stumped at this point.

@JoeDoherty I used the following digitalocean tutorial, this was my first deployment. [Digitalocean Flask Depoyment Tutorial](https://www.digitalocean.com/community/articles/how-to-deploy-a-flask-application-on-an-ubuntu-vps) — jsm1th, Mar 27 '14 at 12:12

score 6 · Accepted Answer · answered Mar 27 '14 at 13:08

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Problem was that I had the key static in my init which caused it to work in dev but in production in the .wsgi it was still dynmaic, I have changed this and all seems to be working now.

answered Mar 27 '14 at 13:08

jsm1th

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I see you've already got to the bottom :) you can approve your own answer – Joe Doherty Mar 27 '14 at 14:12
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@JoeDoherty Thanks, says I have to wait a day so tomorrow I will. – jsm1th Mar 27 '14 at 15:10
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@jsm1th I am running into the same problem, can you share some actual code as I don't understand what you mean by having the key static in the init.. – PYB Jul 24 '19 at 00:33
what do you mean by setting the secret key from static to dynamic? – user11696358 Sep 22 '21 at 11:12
any code or hands on solution for this stupid problem ? – Ali Aug 12 '23 at 14:22

Flask Session will not Persist

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