Function Validate

api/validate.go:51–67

Validate validates an incoming request according to different criteria: - If the request is nil, [api.ErrEmptyRequest] is returned - The request is validated according to the generated validation method - Lastly, if the request is a [api.PaginatedRequest], an additional check is performed to ensure

(req IncomingRequest)

// Note: This function already returns a gRPC error, so the error can be returned directly without any wrapping in a
// request function.
func Validate(req IncomingRequest) (err error) {
	// Check, if request is nil. We need to check whether the interface itself is nil (untyped nil); this happens if
	// someone is directly setting nil to a variable of the interface IncomingRequest. Furthermore, we need to check,
	// whether the *value* of the interface is nil. This can happen if nil is first assigned to a variable of a struct
	// (pointer) that implements the interface. If this variable is then passed to the validate function, the req
	// parameter is not nil, but the value of the interface representing it is.
	if util.IsNil(req) {
		return status.Errorf(codes.InvalidArgument, "%s", ErrEmptyRequest)
	}
	// Validate request
	err = validator.Validate(req)
	if err != nil {
		return status.Errorf(codes.InvalidArgument, "%v: %v", ErrInvalidRequest, err)
	}

	return nil
}

type IncomingRequest interface {
	proto.Message