Schema engine error
I've been developing a project with Next, Express, Prisma, PostgerSQL.
But there's 'Schema engine error' when I migrate posgresql database.
Please help me fix this error.
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A "Schema engine error" during Prisma migrations with PostgreSQL is a common issue and can have several causes. Here are the most relevant troubleshooting steps based on your scenario and the knowledge sources:
1. Check for PgBouncer Issues (Supabase/Pooling):
If you are using a pooled connection (e.g., Supabase with port 6543), you must add
Example:
See more: Supabase Prisma Integration and Discussion. 2. Database Not Empty:
If your database already has tables or data, Prisma Migrate expects an empty schema for the first migration. If not, you'll get errors like
See: Github Issue. 3. Failed Migrations or Syntax Errors:
If a migration fails (e.g., due to a SQL error or a NOT NULL constraint on existing data), you should fix the root cause and then run: This will reset your database and re-apply migrations (for development only).
See: Prisma Docs - Failed Migrations. 4. Version Compatibility:
Ensure your
See: Github Issue. If you still encounter issues, please provide the full error message and your
If you are using a pooled connection (e.g., Supabase with port 6543), you must add
&pgbouncer=true to your DATABASE_URL. Prisma's schema engine does not work with PgBouncer in transaction pooling mode unless this is set.Example:
See more: Supabase Prisma Integration and Discussion. 2. Database Not Empty:
If your database already has tables or data, Prisma Migrate expects an empty schema for the first migration. If not, you'll get errors like
The database schema is not empty. In this case, you need to baseline your database before running migrations.See: Github Issue. 3. Failed Migrations or Syntax Errors:
If a migration fails (e.g., due to a SQL error or a NOT NULL constraint on existing data), you should fix the root cause and then run: This will reset your database and re-apply migrations (for development only).
See: Prisma Docs - Failed Migrations. 4. Version Compatibility:
Ensure your
prisma and @prisma/client versions match. Mismatched versions can cause engine errors.See: Github Issue. If you still encounter issues, please provide the full error message and your
schema.prisma for more targeted help.