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rails / 4.1 / actiondispatch / flash / flashhash.html

class ActionDispatch::Flash::FlashHash

Parent:
Object
Included modules:
Enumerable

Public Class Methods

from_session_value(value) Show source 
# File actionpack/lib/action_dispatch/middleware/flash.rb, line 79
def self.from_session_value(value)
  flash = case value
          when FlashHash # Rails 3.1, 3.2
            new(value.instance_variable_get(:@flashes), value.instance_variable_get(:@used))
          when Hash # Rails 4.0
            new(value['flashes'], value['discard'])
          else
            new
          end

  flash.tap(&:sweep)
end

Public Instance Methods

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 117
def [](k)
  @flashes[k.to_s]
end
[]=(k, v) Show source 
# File actionpack/lib/action_dispatch/middleware/flash.rb, line 111
def []=(k, v)
  k = k.to_s
  @discard.delete k
  @flashes[k] = v
end
alert() Show source

Convenience accessor for flash[:alert].

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 218
def alert
  self[:alert]
end
alert=(message) Show source

Convenience accessor for flash[:alert]=.

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 223
def alert=(message)
  self[:alert] = message
end
clear() Show source 
# File actionpack/lib/action_dispatch/middleware/flash.rb, line 150
def clear
  @discard.clear
  @flashes.clear
end
delete(key) Show source 
# File actionpack/lib/action_dispatch/middleware/flash.rb, line 135
def delete(key)
  key = key.to_s
  @discard.delete key
  @flashes.delete key
  self
end
discard(k = nil) Show source

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

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 203
def discard(k = nil)
  k = k.to_s if k
  @discard.merge Array(k || keys)
  k ? self[k] : self
end
each(&block) Show source 
# File actionpack/lib/action_dispatch/middleware/flash.rb, line 155
def each(&block)
  @flashes.each(&block)
end
empty?() Show source 
# File actionpack/lib/action_dispatch/middleware/flash.rb, line 146
def empty?
  @flashes.empty?
end
initialize_copy(other) Show source
Calls superclass method 
# File actionpack/lib/action_dispatch/middleware/flash.rb, line 103
def initialize_copy(other)
  if other.now_is_loaded?
    @now = other.now.dup
    @now.flash = self
  end
  super
end
keep(k = nil) Show source

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

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 193
def keep(k = nil)
  k = k.to_s if k
  @discard.subtract Array(k || keys)
  k ? self[k] : self
end
key?(name) Show source 
# File actionpack/lib/action_dispatch/middleware/flash.rb, line 131
def key?(name)
  @flashes.key? name.to_s
end
keys() Show source 
# File actionpack/lib/action_dispatch/middleware/flash.rb, line 127
def keys
  @flashes.keys
end
notice() Show source

Convenience accessor for flash[:notice].

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 228
def notice
  self[:notice]
end
notice=(message) Show source

Convenience accessor for flash[:notice]=.

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 233
def notice=(message)
  self[:notice] = message
end

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'].

Also, brings two convenience accessors:

flash.now.alert = "Beware now!"
# Equivalent to flash.now[:alert] = "Beware now!"

flash.now.notice = "Good luck now!"
# Equivalent to flash.now[:notice] = "Good luck now!"

# File actionpack/lib/action_dispatch/middleware/flash.rb, line 185
def now
  @now ||= FlashNow.new(self)
end
to_hash() Show source 
# File actionpack/lib/action_dispatch/middleware/flash.rb, line 142
def to_hash
  @flashes.dup
end
to_session_value() Show source 
# File actionpack/lib/action_dispatch/middleware/flash.rb, line 92
def to_session_value
  return nil if empty?
  {'discard' => @discard.to_a, 'flashes' => @flashes}
end

Protected Instance Methods

now_is_loaded?() Show source 
# File actionpack/lib/action_dispatch/middleware/flash.rb, line 238
def now_is_loaded?
  @now
end
stringify_array(array) Show source 
# File actionpack/lib/action_dispatch/middleware/flash.rb, line 242
def stringify_array(array)
  array.map do |item|
    item.kind_of?(Symbol) ? item.to_s : item
  end
end

© 2004–2016 David Heinemeier Hansson
Licensed under the MIT License.