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Class: ActionDispatch::Flash::FlashHash

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Instance Chain:
Inherits: Object
Defined in: actionpack/lib/action_dispatch/middleware/flash.rb

Instance Attribute Summary

::Enumerable - Included

#many?

Returns true if the enumerable has more than 1 element.

Instance Method Summary

::Enumerable - Included

#compact_blank

Returns a new ::Array without the blank items.

#exclude?

The negative of the Enumerable#include?.

#excluding

Returns a copy of the enumerable excluding the specified elements.

#in_order_of

Returns a new ::Array where the order has been set to that provided in the series, based on the key of the objects in the original enumerable.

#including

Returns a new array that includes the passed elements.

#index_by

Convert an enumerable to a hash, using the block result as the key and the element as the value.

#index_with

Convert an enumerable to a hash, using the element as the key and the block result as the value.

#maximum

Calculates the maximum from the extracted elements.

#minimum

Calculates the minimum from the extracted elements.

#pick

Extract the given key from the first element in the enumerable.

#pluck

Extract the given key from each element in the enumerable.

#sole

Returns the sole item in the enumerable.

#without

Instance Attribute Details

#alert (rw)

Convenience accessor for flash[:alert].

[ GitHub ]

  
# File 'actionpack/lib/action_dispatch/middleware/flash.rb', line 268

def alert
  self[:alert]
end

#alert=(message) (rw)

Convenience accessor for flash[:alert]=.

[ GitHub ]

  
# File 'actionpack/lib/action_dispatch/middleware/flash.rb', line 273

def alert=(message)
  self[:alert] = message
end

#empty?Boolean (readonly)

[ GitHub ]

  
# File 'actionpack/lib/action_dispatch/middleware/flash.rb', line 193

def empty?
  @flashes.empty?
end

#notice (rw)

Convenience accessor for flash[:notice].

[ GitHub ]

  
# File 'actionpack/lib/action_dispatch/middleware/flash.rb', line 278

def notice
  self[:notice]
end

#notice=(message) (rw)

Convenience accessor for flash[:notice]=.

[ GitHub ]

  
# File 'actionpack/lib/action_dispatch/middleware/flash.rb', line 283

def notice=(message)
  self[:notice] = message
end

Instance Method Details

#[](k)

[ GitHub ]

  
# File 'actionpack/lib/action_dispatch/middleware/flash.rb', line 162

def [](k)
  @flashes[k.to_s]
end

#[]=(k, v)

[ GitHub ]

  
# File 'actionpack/lib/action_dispatch/middleware/flash.rb', line 156

def []=(k, v)
  k = k.to_s
  @discard.delete k
  @flashes[k] = v
end

#clear

[ GitHub ]

  
# File 'actionpack/lib/action_dispatch/middleware/flash.rb', line 197

def clear
  @discard.clear
  @flashes.clear
end

#delete(key)

Immediately deletes the single flash entry. Use this method when you want remove the message within the current action. See also #discard.

[ GitHub ]

  
# File 'actionpack/lib/action_dispatch/middleware/flash.rb', line 182

def delete(key)
  key = key.to_s
  @discard.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

Use this method when you want to display the message in the current action but not in the next one. See also #delete.

[ GitHub ]

  
# File 'actionpack/lib/action_dispatch/middleware/flash.rb', line 253

def discard(k = nil)
  k = k.to_s if k
  @discard.merge Array(k || keys)
  k ? self[k] : self
end

#each(&block)

[ GitHub ]

  
# File 'actionpack/lib/action_dispatch/middleware/flash.rb', line 202

def each(&block)
  @flashes.each(&block)
end

#initialize_copy(other)

[ GitHub ]

  
# File 'actionpack/lib/action_dispatch/middleware/flash.rb', line 148

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
[ GitHub ]

  
# File 'actionpack/lib/action_dispatch/middleware/flash.rb', line 240

def keep(k = nil)
  k = k.to_s if k
  @discard.subtract Array(k || keys)
  k ? self[k] : self
end

#key?(name) ⇒ Boolean

[ GitHub ]

  
# File 'actionpack/lib/action_dispatch/middleware/flash.rb', line 176

def key?(name)
  @flashes.key? name.to_s
end

#keys

[ GitHub ]

  
# File 'actionpack/lib/action_dispatch/middleware/flash.rb', line 172

def keys
  @flashes.keys
end

#merge!(h)

Alias for #update.

[ GitHub ]

  
# File 'actionpack/lib/action_dispatch/middleware/flash.rb', line 206

alias :merge! :update

#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'].

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!"
[ GitHub ]

  
# File 'actionpack/lib/action_dispatch/middleware/flash.rb', line 232

def now
  @now ||= FlashNow.new(self)
end

#stringify_array(array) (private)

[ GitHub ]

  
# File 'actionpack/lib/action_dispatch/middleware/flash.rb', line 293

def stringify_array(array) # :doc:
  array.map do |item|
    item.kind_of?(Symbol) ? item.to_s : item
  end
end

#to_hash

[ GitHub ]

  
# File 'actionpack/lib/action_dispatch/middleware/flash.rb', line 189

def to_hash
  @flashes.dup
end