I am trying to redirect a user if they re logged in on page Supabase #help

I am trying to redirect a user if they’re logged i...

silas

08/03/2021, 4:26 PM

I am trying to redirect a user if they’re logged in on page load and I can’t for the life of me figure out how. I’ve been using

supabase.auth.user()

and

supabase.auth.session()

but often the page loads before the auth values are fetched and updated. How are you guys handling this?

silas

08/03/2021, 4:54 PM

The values are null initially but are quickly populated once Supabase checks that the user is logged in. If this function returned a Promise, none of this would be a problem!

ShaneTheKing

08/03/2021, 5:00 PM

Typescript, so maybe not the most helpful to you:

ShaneTheKing

08/03/2021, 5:01 PM

Basically I know the user hasn't been checked yet if the value is

undefined

. If it's

null

then they aren't logged in, if it's a truthy value then they've logged in

ShaneTheKing

08/03/2021, 5:01 PM

so I can subscribe to

_supaService.user$

anywhere (this is a service provided in root) and check the values to know what state the user is in

ShaneTheKing

08/03/2021, 5:02 PM

but I do agree that it's annoying that the user method isn't something you can wait for asynchronously and it only tells you the current state when you call it

ShaneTheKing

08/03/2021, 5:04 PM

Also if you do something like above in a non-root injected service, you're gonna wanna catch the subscription returned from

onAuthStateChange

so you can destroy it when needed so you don't have memory leaks

frubalu

08/03/2021, 5:54 PM

Are you using NextJS by chance?

frubalu

08/03/2021, 5:55 PM

Whoops I just read further down the channel before this was converted to a thread. I think the solution I've got in NextJS could work for you

frubalu

08/03/2021, 5:56 PM

https://dev.to/dabit3/magic-link-authentication-and-route-controls-with-supabase-and-next-js-leo

frubalu

08/03/2021, 5:56 PM

basically the idea is that you have an api route which sets a cookie. then on page load (in the ssr call), you can check for the existence of that cookie and redirect to login if necessary

silas

08/04/2021, 5:43 AM

Great to know, thank you! Somehow I missed that the value is

undefined

before it's set. I thought it was

null

and that it stayed

null

when the user was logged out. I appreciate the example too—I'll give it a shot when I get the chance.

silas

08/04/2021, 5:44 AM

Thanks so much, I'll check this out as well.

silas

08/04/2021, 5:47 AM

Here's a link to the GitHub discussion I created a while back for those interested https://github.com/supabase/supabase/discussions/2315

ShaneTheKing

08/04/2021, 8:26 AM

It is null, my code sets a behavior subject value to undefined until a result from the server comes back using refresh session. This allows me to sort of wait until I know for sure

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