Skip to content

Latest commit

 

History

History
39 lines (29 loc) · 1.22 KB

flash.md

File metadata and controls

39 lines (29 loc) · 1.22 KB
Raw

Flash

This extension provides the typical flash messages functionality. Messages for users are stored in session to be consumed by another request after a redirect.

This extension depends on Rack::Flash (gem name is rack-flash3) and Rack::Session (shipped with rack) middlewares.

WebPipe::Conn#flash contains the flash bag. You can use the #add_flash(key, value) method to add a message to it.

There is also an #add_flash_now(key, value) method, which adds a message to the bag to consume it in the current request. Be aware that it is, in fact, coupling with the view layer. Something that has to be consumed in the current request should be just data given to the view layer, but it helps when it can treat both scenarios as flash messages.

require 'web_pipe'
require 'rack/session/cookie'
require 'rack-flash'

WebPipe.load_extensions(:flash)

class MyApp
  include WebPipe

  use :session, Rack::Session::Cookie, secret: 'secret'
  use :flash, Rack::Flash

  plug :add_to_flash, ->(conn) { conn.add_flash(:notice, 'Hello world') }
  
  # Usually you will end up making `conn.flash` available to your view
  # system:
  #
  # <div class="notice"><%= flash[:notice] %></div>
 end