multica-ai/multica · error

value must be a string

Error message

value must be a string

What it means

Error "value must be a string" thrown in multica-ai/multica.

Source

Thrown at server/internal/handler/property.go:320

// values where possible — agents consume these directly to self-correct.
func validatePropertyValue(def db.IssueProperty, raw json.RawMessage) ([]byte, error) {
	if len(raw) == 0 {
		return nil, errors.New("value is required")
	}
	var v any
	if err := json.Unmarshal(raw, &v); err != nil {
		return nil, fmt.Errorf("value must be valid JSON: %w", err)
	}
	if v == nil {
		return nil, errors.New("value cannot be null (use DELETE to unset a property)")
	}

	cfg := parsePropertyConfig(def.Config)
	switch def.Type {
	case "text":
		s, ok := v.(string)
		if !ok {
			return nil, errors.New("value must be a string")
		}
		if strings.TrimSpace(s) == "" {
			return nil, errors.New("value cannot be empty (use DELETE to unset a property)")
		}
		if utf8.RuneCountInString(s) > maxPropertyTextValueLen {
			return nil, fmt.Errorf("value must be %d characters or fewer", maxPropertyTextValueLen)
		}
		return json.Marshal(sanitizeNullBytes(s))
	case "url":
		s, ok := v.(string)
		if !ok {
			return nil, errors.New("value must be a URL string")
		}
		s = strings.TrimSpace(s)
		if len(s) > maxPropertyURLValueLen {
			return nil, fmt.Errorf("value must be %d characters or fewer", maxPropertyURLValueLen)
		}
		u, err := url.Parse(s)

View on GitHub (pinned to 2c0912b6ec)

Solutions

1. Send the value as a JSON string.

When it happens

Trigger: Thrown at server/internal/handler/property.go:320 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of multica-ai/multica@2c0912b6ec (2026-08-15). Data as JSON: /api/errors/b94c32152ee59ec2. Report an issue: GitHub.