Function FormValuesOr

binder_generic.go:300–314

FormValuesOr extracts and parses all values for a form values key as a slice. Returns defaultValue if the parameter is not found. Returns an error only if parsing any value fails or form parsing errors occur. Example: tags, err := echo.FormValuesOr[string](c, "tags", []string{}) // If "tags" is

(c *Context, key string, defaultValue []T, opts ...any)

//
// See ParseValues for supported types and options
func FormValuesOr[T any](c *Context, key string, defaultValue []T, opts ...any) ([]T, error) {
	formValues, err := c.FormValues()
	if err != nil {
		return nil, fmt.Errorf("failed to parse form values, key: %s, err: %w", key, err)
	}
	values, ok := formValues[key]
	if !ok {
		return defaultValue, nil
	}
	result, err := ParseValuesOr[T](values, defaultValue, opts...)
	if err != nil {
		return nil, NewBindingError(key, values, "form values", err)
	}
	return result, nil
}

// ParseValues parses value to generic type slice. Same types are supported as ParseValue
// function but the result type is slice instead of scalar value.