var (
		primaryFields, foreignFields []*Field
		primarySchema, foreignSchema = schema, relation.FieldSchema
		gl                           = cgl
	)

	if gl == guessGuess {
		if field.Schema == relation.FieldSchema {
			gl = guessBelongs
		} else {
			gl = guessHas
		}
	}

	reguessOrErr := func() {
		switch cgl {
		case guessGuess: