mapping_incomplete

What to do: Map every required stream field before attaching.

A stream schema's required fields must each have a source (from, const, or default) in the form's mapping. details lists the missing fields. This is raised at attach time so delivery time holds no surprises.

Shape

{ "error": { "code": "mapping_incomplete", "message": "…", "hint": "Map every required stream field before attaching.", "docs": "https://postbag.dev/docs/errors/mapping_incomplete/" } }

All codes are listed on the error reference. Conventions for the envelope, hints and next[] are in the API overview.