core/db_exception library

Exceptions / Errors

DbConnectionException

The database could not be reached (connection refused, dropped, TLS failure, timeout). Typically mapped to HTTP 503 Service Unavailable.

DbException

Typed exceptions thrown by every dartapi_db driver.

ForeignKeyViolationException

A FOREIGN KEY constraint was violated — referencing a missing row, or deleting a row that is still referenced. Typically mapped to HTTP 409 Conflict or 422.

QueryException

Any other failed statement — SQL syntax errors, unknown columns, type mismatches, etc.

UniqueViolationException

A UNIQUE (or PRIMARY KEY) constraint was violated — e.g. inserting a duplicate email. Typically mapped to HTTP 409 Conflict.