Unclear Introspection error message: Error parsing attribute "@id": Fields that are marked as id must be required.

Introspecting SQLite:

CREATE TABLE "playlist_track" (
	"PlaylistId"	INTEGER NOT NULL,
	"TrackId"	INTEGER NOT NULL,
	"id"	INTEGER PRIMARY KEY AUTOINCREMENT,
	FOREIGN KEY("PlaylistId") REFERENCES "playlists"("PlaylistId") ON DELETE NO ACTION ON UPDATE NO ACTION,
	FOREIGN KEY("TrackId") REFERENCES "tracks"("TrackId") ON DELETE NO ACTION ON UPDATE NO ACTION
)

Creates error message:

 ERROR  Oops, an unexpected error occured!
Schema parsing

error: Error parsing attribute "@id": Fields that are marked as id must be required.
  -->  schema.prisma:126
   |
125 |   TrackId    tracks
126 |   id         Int?      @id
   |

Error message does not include name of table/model for context.

[sorenbs]

For clarification:

The consequence of inferring Integer PKs as Autoincrement NOT NULL (or as it would look like in the schema.prisma file: Int @id @default(autoincrement())) is that the id would be optional when writing, and non-null when reading.

DECISION: this is excellent!

See also https://github.com/prisma/specs/issues/176#issuecomment-561289686 for context on autoincrement syntax.

[do4gr]

This can only occur on SQLite since only there are optional id fields valid DDL. Models with an optional Id will now be marked as @@ignore during introspection and won’t cause a validation error. If a model is handwritten with an optional id and without @@ignore, you’ll still get the same validation error which is then clear enough.