Implementation detail: please do not change the signature of the FlashHash class. Doing that will likely affect all Rails apps in production as the FlashHash currently stored in their sessions will become invalid.

Methods
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Included Modules
Instance Public methods
[](k)

Source: show | on GitHub 

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 100
def [](k)
  @flashes[k]
end
alert()

Convenience accessor for flash

Source: show | on GitHub 

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 195
def alert
  self[:alert]
end
alert=(message)

Convenience accessor for flash=

Source: show | on GitHub 

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 200
def alert=(message)
  self[:alert] = message
end
clear()

Source: show | on GitHub 

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 131
def clear
  @flashes.clear
end
delete(key)

Source: show | on GitHub 

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 118
def delete(key)
  @flashes.delete key
  self
end
discard(k = nil)

Marks the entire flash or a single flash entry to be discarded by the end of the current action:

flash.discard              # discard the entire flash at the end of the current action
flash.discard(:warning)    # discard only the "warning" entry at the end of the current action

Source: show | on GitHub 

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 173
def discard(k = nil)
  use(k)
end
each(&block)

Source: show | on GitHub 

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 135
def each(&block)
  @flashes.each(&block)
end
empty?()

Source: show | on GitHub 

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 127
def empty?
  @flashes.empty?
end
initialize_copy(other)

Source: show | on GitHub 

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 87
def initialize_copy(other)
  if other.now_is_loaded?
    @now = other.now.dup
    @now.flash = self
  end
  super
end
keep(k = nil)

Keeps either the entire current flash or a specific flash entry available for the next action:

flash.keep            # keeps the entire flash
flash.keep(:notice)   # keeps only the "notice" entry, the rest of the flash is discarded

Source: show | on GitHub 

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 165
def keep(k = nil)
  use(k, false)
end
key?(name)

Source: show | on GitHub 

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 114
def key?(name)
  @flashes.key? name
end
keys()

Source: show | on GitHub 

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 110
def keys
  @flashes.keys
end
notice()

Convenience accessor for flash

Source: show | on GitHub 

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 205
def notice
  self[:notice]
end
notice=(message)

Convenience accessor for flash=

Source: show | on GitHub 

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 210
def notice=(message)
  self[:notice] = message
end
now()

Sets a flash that will not be available to the next action, only to the current.

flash.now[:message] = "Hello current action"

This method enables you to use the flash as a central messaging system in your app. When you need to pass an object to the next action, you use the standard flash assign ([]=). When you need to pass an object to the current action, you use now, and your object will vanish when the current action is done.

Entries set via now are accessed the same way as standard entries: flash['my-key'].

Source: show | on GitHub 

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 157
def now
  @now ||= FlashNow.new(self)
end
to_hash()

Source: show | on GitHub 

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 123
def to_hash
  @flashes.dup
end
Instance Protected methods
now_is_loaded?()

Source: show | on GitHub 

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 216
def now_is_loaded?
  !!@now
end
use(key = nil, used = true)

Used internally by the keep and discard methods

use()               # marks the entire flash as used
use('msg')          # marks the "msg" entry as used
use(nil, false)     # marks the entire flash as unused (keeps it around for one more action)
use('msg', false)   # marks the "msg" entry as unused (keeps it around for one more action)

Returns the single value for the key you asked to be marked (un)used or the FlashHash itself if no key is passed.

Source: show | on GitHub 

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 227
def use(key = nil, used = true)
  Array(key || keys).each { |k| used ? @used << k : @used.delete(k) }
  return key ? self[key] : self
end