Method getAncestorJSON

db/crud.go:809–817

Gets the body of a revision's nearest ancestor, as raw JSON (without _id or _rev.) If no ancestor has any JSON, returns nil but no error.

(ctx context.Context, doc *Document, revid string)

// Gets the body of a revision's nearest ancestor, as raw JSON (without _id or _rev.)
// If no ancestor has any JSON, returns nil but no error.
func (db *DatabaseCollectionWithUser) getAncestorJSON(ctx context.Context, doc *Document, revid string) ([]byte, error) {
	for {
		if revid = doc.History.getParent(revid); revid == "" {
			return nil, nil
		} else if body := doc.getRevisionBodyJSON(ctx, revid, db.RevisionBodyLoader); body != nil {
			return body, nil
		}
	}
}

// Returns the body of a revision given a document struct. Checks user access.
// If the user is not authorized to see the specific revision they asked for,