Prisma Migrate limitations and known issues

The following limitations apply to Prisma Migrate.

MongoDB connector not supported

Prisma Migrate does not currently support the MongoDB connector.

You cannot automatically switch database providers

Prisma Migrate generates SQL files that are specific to your provider. This means that you cannot use the same migration files for PostgreSQL in production and SQLite in development, because the syntax in the migrations will be incompatible.

In 2.15.0 and later, Prisma Migrate detects when the migrations do not match the configured provider and prints a helpful error message. For example, if your migrations are for a PostgreSQL database but you are using a provider is set to mysql:

Error: P3014
The datasource provider `postgresql` specified in your schema does not match the one specified in the migration_lock.toml, mysql. Please remove your current migration directory and start a new migration history with prisma migrate dev.

In order to manually switch the database provider, you must:

  • Change the provider and url parameters in the datasource block in your schema
  • Archive or remove your existing migration history - there must not be a ./prisma/migrations folder
  • Run prisma migrate dev to start a new migration history

The last step creates a new initial migration that goes from an empty database to your current schema.prisma. Be aware that:

  • This migration will only contain what is reflected in your schema.prisma. If you manually edited your previous migration files to add custom SQL you will need to again add this yourself.
  • The newly created database using the new provider will not contain any data.

Lack of rollbacks / down migrations

Prisma Migrate does not currently roll back a migration without resetting the database. For a simple and integrated way to re-create data in your development database when the database is reset, check out our seeding guide.

Data loss when resetting database

In a development environment, Prisma Migrate sometimes prompts you to reset the database. Resetting drops and recreates the database, which results in data loss. The database is reset when:

  • You call prisma migrate reset explicitly
  • You call prisma migrate dev and Prisma Migrate detects drift in the database or a migration history conflict

The prisma migrate dev and prisma migrate reset commands are designed to be used in development only, and should not affect production data.

When the database is reset, if Prisma Migrate detects a seed script, it will trigger seeding.

Note: For a simple and integrated way to re-create data when the database is reset, check out our seeding guide.

Prisma Migrate and PgBouncer

You might see the following error if you attempt to run Prisma Migrate commands in an environment that uses PgBouncer for connection pooling:

Error: undefined: Database error
Error querying the database: db error: ERROR: prepared statement "s0" already exists

See Prisma Migrate and PgBouncer workaround for further information and a workaround. Follow GitHub issue #6485 for updates.

Edit this page on GitHub