Function QueryParamsOr

binder_generic.go:189–200

QueryParamsOr extracts and parses all values for a query parameter key as a slice. Returns defaultValue if the parameter is not found. Returns an error only if parsing any value fails. Example: ids, err := echo.QueryParamsOr[int](c, "ids", []int{}) // If "ids" is missing: returns ([], nil) // I

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

//
// See ParseValues for supported types and options
func QueryParamsOr[T any](c *Context, key string, defaultValue []T, opts ...any) ([]T, error) {
	values, ok := c.QueryParams()[key]
	if !ok {
		return defaultValue, nil
	}

	result, err := ParseValuesOr[T](values, defaultValue, opts...)
	if err != nil {
		return nil, NewBindingError(key, values, "query params", err)
	}
	return result, nil
}

// FormValue extracts and parses a single form value from the request by key.
// It returns the typed value and an error if binding fails. Returns ErrNonExistentKey if parameter not found.