Struct Flash 

pub struct Flash { /* private fields */ }

A bag of one-shot messages keyed by name (e.g. notice, alert).

Implementations

impl Flash

pub fn new() -> Self

pub fn set(&mut self, key: impl Into<String>, message: impl Into<String>)

Set a flash message under key (e.g. flash.set("notice", "Saved!")).

pub fn get(&self, key: &str) -> Option<&str>

Read a flash message by key.

pub fn is_empty(&self) -> bool

Whether there are no messages.

pub fn iter(&self) -> impl Iterator<Item = (&String, &String)>

Iterate (key, message) pairs, e.g. to render them all in a layout.

pub fn to_cookie(&self, store: &CookieSessionStore) -> String

Serialize and sign the flash into a cookie value for the next request.

pub fn from_cookie(store: &CookieSessionStore, raw: &str) -> Self

Read the flash from a signed cookie value, yielding an empty flash when the cookie is absent, malformed, or fails signature verification.

Trait Implementations

impl Clone for Flash

fn clone(&self) -> Flash

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Flash

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Flash

fn default() -> Flash

Returns the “default value” for a type.