Method validateRelationTypeStatement

pkg/dsl/ast/validation.go:35–47

validateRelationTypeStatement - validates a single relation type statement to ensure that it meets certain requirements.

(ref RelationTypeStatement)

// validateRelationTypeStatement - validates a single relation type statement to ensure that it meets certain requirements.
func (sch *Schema) validateRelationTypeStatement(ref RelationTypeStatement) error {
	// Check that the entity reference in the relation type statement is valid.
	if !sch.GetReferences().IsEntityReferenceExist(ref.Type.Literal) {
		return validationError(ref.Type.PositionInfo, base.ErrorCode_ERROR_CODE_RELATION_REFERENCE_NOT_FOUND_IN_ENTITY_REFERENCES.String())
	}
	// If the relation type statement does not have a direct entity reference, check that the relation reference is valid.
	if !IsDirectEntityReference(ref) {
		if !sch.GetReferences().IsRelationReferenceExist(ref.Type.Literal + "#" + ref.Relation.Literal) {
			return validationError(ref.Type.PositionInfo, base.ErrorCode_ERROR_CODE_RELATION_REFERENCE_NOT_FOUND_IN_ENTITY_REFERENCES.String())
		}
	}
	return nil
}

// validationError - returns a formatted error message.
func validationError(info token.PositionInfo, message string) error {