How to Fix an AI-Built App Where the Database Keeps Resetting

What is actually happening

AI builders often default to in-memory databases or local SQLite files that get wiped on every redeploy or container restart. The app works perfectly during a single session and looks broken to anyone who comes back the next day. This is not a bug in your code; it is the database layer being temporary by design.

The fix, in order

Try these in sequence. Most apps are fixed by the first or second step.

1. 1

   Confirm what database your app is actually using

   Open your code and look for the database client setup. If you see things like 'better-sqlite3' with a local file path, '@vercel/kv' with no persistent backing, or 'in-memory' anywhere in your config, your DB is ephemeral. If you see Supabase, Postgres, MySQL, or MongoDB connection strings, your DB should be persistent and the issue is elsewhere.

2. 2

   Set up a real Supabase project

   Go to supabase.com and create a free project. Copy the connection string and the API keys. This gives you a real Postgres database that persists forever and has a free tier that is more than enough for early apps.

3. 3

   Recreate your schema in Supabase

   If your AI tool generated migration files, run them against the new Supabase project using the Supabase SQL editor. If you do not have migration files, manually recreate the tables by reading your code's data models and writing CREATE TABLE statements. This is tedious but straightforward.

4. 4

   Replace your DB client code

   Find every file that imports the old DB client and replace it with the Supabase client (or your chosen DB's client). For Supabase, install '@supabase/supabase-js' and use createClient(SUPABASE_URL, SUPABASE_ANON_KEY). The query syntax is similar but not identical to most ORMs.

5. 5

   Migrate any existing data

   If you have data in the ephemeral DB you want to keep, write a quick script that reads from the old DB and writes to the new one. For SQLite, you can dump to JSON. For Replit DB, iterate over keys and POST to Supabase. Once the migration runs, redeploy and confirm the data shows up.

6. 6

   Update environment variables

   Add SUPABASE_URL and SUPABASE_ANON_KEY (and SUPABASE_SERVICE_ROLE_KEY if needed) to your hosting platform's environment variables. Redeploy. Test by adding a record, redeploying again, and confirming the record is still there.

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