Convex Community

Join the Convex Discord! Explore Convex, the fullstack TypeScript platform for developers and startup founders.

Join

Convex Community

Join the Convex Discord! Explore Convex, the fullstack TypeScript platform for developers and startup founders.

Join

support-community

show-and-tell

general

self-hosted

announcements

Nishil Faldu

1/30/2025

Lets say there are a lot of apps...

Lets assume that there are 5 apps with their individual databases on Convex. Now lets say later in the future I realize that I want to suggested recommendations on one app based on the data in other apps - would that be possible with convex? (5 apps would have 5 databases as I think it would be scalable for each of those individual services/apps). Also is it possible to share auth data amongst all 5 apps?

Zachoo

1/30/2025

Keeping the user logged in forever.

I am developing a mobile application using Convex for authentication management. The app is built using two approaches: a Capacitor Next.js app and a React Native app (for testing both frameworks). How can I maintain the user authentication session across both platforms so that users only need to log in once? Could you provide guidance on implementing a persistent auth session in this setup?...

noob saibot

1/30/2025

Can I setup an index with array list field

In my users table, I'm adding a new key roles which is an array. Is it possible to declare an index based on that field? If yes, how could I run a query using the .withIndex api where the values of the field are in a list? If this is not possible, is there a pattern or workaround I could choose to "limit" queries upon the (very large) users table, based on roles?

djbalin

1/30/2025

Circular dependencies in validators

I'm defining my tables using Table from convex helpers, and I want to define some enriched versions of these documents using a Convex validator in the same schema.ts file such that I can pass it around to other validators and Convex functions. I'm running into circular dependency issues, however. See the attached screenshot for the specific example. I can seemingly fix this by putting enrichment validators into a enrich.ts file in each table folder, but is this really the only way? I would love to have both table validator and enriched validators and types in the same schema.ts file....

Sara

1/30/2025

while using pagination, I'm failing to sort the elements in the right order of creation

while using the pagination function with a bunch of messgaes, I'm giving them order("desc") so we can get the last numItems that have been added to the array, when I do so, after the second load, the element are re-ordered bottom up, how can I fix this in the best way possible with convex? I tried sorting with .sort((a,b)=>a._creationTime -b.creationTime) but that resorts them on the second load,...

Nicolas

1/30/2025

How to reduce bandwidth reads?

Bandwidth reads are out of place for the size of the project, how can I identify what is the cause?

sbkl

1/30/2025

convex auth session across subdomains

Is there a way to make a convex auth session valid across subdomains of a same domain like it is for clerk by default?

ethanlolomg

1/30/2025

Can't access Convex cloud hosted server

Can't open the Convex dashboard for all of my projects, and verify our client isn't able to access too: WebSocket connection to 'wss://shiny-dolphin-222.convex.cloud/api/1.18.2/sync' failed: It happened a couple days ago too, but I think after a few hours it fixed on its own. Do you what is the cause, and how to prevent it?...

terms

1/29/2025

Passing down additional params during user signup using OAuth provider

Is there a way to pass down additional params to be written using await signIn("google")? I'm aware of the afterUserCreatedOrUpdated method but that callback won't receive the params passed from signIn. Additionally, is there a way of removing phone, phoneVerificationTime, isAnonymous, and image fields? These fields aren't relevant to my application.

Sara

1/29/2025

discussing the best approach to add notifications on tables in a chat app.

So I have a channel with messages and users that I would like to implement notifications on, what I did so far is create a last read messages table to estimate the last message the viewer saw, from that point, what would make more sense to create notifications on the web, to run a table trigger and create a condition that when user x is sending messages and user y is receiving them, and in this case user y is not viewing the channel, we push a notification then? and when user y is viewing we turn that condition off so no notifications are being sent? does anyone have a better way to implement this?...

Nopecio

1/28/2025

Security questions

Hi! I love convex, but now i face a project restricted on the security front. So a couple of questions: *There is no native apikey or token exchange between client and server, and the convex backend url is sent to the front (next_public_convex_url), Does this means that anyone with knowledge of the schema could attack and steal my data (for example a former developer from my team?) (in classical scenarios i rotate the passwords and that's about it, but in convex there is no such mechanism, the front directly query the data without any authentication.)...

djbalin

1/28/2025

When to throw an error?

Hi, we're thinking about how to handle errors in our app in a streamlined way. By "errors" I mean not only errors/exceptions that Convex throws but also unexpected occurrences business-logic wise. For example, we enrich a lot of our data by fetching related or referenced documents. Each ctx.db.get can return null, but this would indicate a business-logic error: a video should not have a channelId which points to a null document. In such a case, we would probably want to entirely dismiss the request and not serve partial data (we keep track of error logs etc. using Axiom). The most straightforward approach in the backend is to throw new Error in all such cases, but that burdens the client with handling all error cases ...

Squirble

1/28/2025

`tsc -b` fails because @convex/_generated references server side code

This is my project: https://github.com/nickretallack/ranked-choice-convex When I run npm run build it runs tsc -b and gives the attached errors. ...

message.txt

Zachoo

1/27/2025

Optimise Fetching data

Hi there! I have an admin dashboard that displays information about users and their apartments. The app includes two lists: one on the /users page that fetches user data and another on the /apartments page that retrieves apartment data, both using the useQuery hook from Convex. However, the app feels slow when switching between these pages. Even though I hit the Convex cache, it still fetches data every time and shows a loading state, which interrupts the experience. Is there a better way to structure this so that moving between pages instantly displays cached data and only updates if the data changes—essentially making it feel like I never left the page?...

fugufish

1/27/2025

Authoring Components

I may be missing it, but is there a place to find out how to author components? I know the api is somewhat in flux, but two components I am interested in: * application level encryption (similar to rails encryption) * better sentry/transaction handling (if possible)...

Degi

1/27/2025

Storing generated audio file doesn't work in action. Same code works fine in HTTP action.

Getting: "store() expects a Blob. If you are trying to store a Request, await request.blob() will give you the correct input." error but I am sure that I pass blob. ``` try { const ttsResponse = await openaiTTS(botText); console.log('ttsResponse', ttsResponse.status, ttsResponse.statusText);...

Corbi-Wan Kenobi

1/26/2025

COPPA compliance?

One of my projects is for the large private school I work at. I would need to store student data. COPPA (basically the student version of HIPPA) would be a factor. Would I want to use the open source convex and host onsite? When I was looking at Supabase they said that they needed some extra configuration if a project needed to be HIPPA compliant. Anything like that with Convex?

Corbi-Wan Kenobi

1/26/2025

Using pagination in convex vs something like TanStack Tables?

I discovered convex via TanStack. I have a playground project where I got TanStack Tables working with pagination, sorting, and filtering all in one go. Benefits/drawbacks on using that over more hands-on coding with convex pagination and other coding to get the same results (dynamic filtering, sorting, address bar syncing and browser history consistency)?

deen

1/26/2025

structuredClone ✨

Last week the Vercel AI SDK casually added a structuredClone call to the generateText functionality, causing it to now fail in the Convex runtime as it doesn't seem to be implemented. https://github.com/vercel/ai/commit/00114c5d0c606ea01ca614606e2b6499666e52d1#diff-479910b2e8ffb3ce9d79aca7bd77eb6972087a2137b71b1d098a2528e7fce454R499 Following the advice here https://discord.com/channels/1019350475847499849/1153313759440408627/1153355495483125810, I added the polyfill for structuredClone and it works! But, it would be cool to not have to do this, or use node. I imagine a lot of people will be hitting this in the coming weeks as our industry is now solely dedicated to building apps with AI™...

Starlord

1/25/2025

Join tables query / paginate

An important limitation in Convex that affects how we need to structure queries, especially for paginated results with joins. Let me explain the problem and show hacky workarounds: The Problem In my current code, i am trying to:...

Previous Next