# File lib/action_dispatch/middleware/flash.rb, line 76 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
# File lib/action_dispatch/middleware/flash.rb, line 113 def [](k) @flashes[k] end
# File lib/action_dispatch/middleware/flash.rb, line 108 def []=(k, v) @discard.delete k @flashes[k] = v end
Convenience accessor for flash[:alert].
# File lib/action_dispatch/middleware/flash.rb, line 211 def alert self[:alert] end
Convenience accessor for flash[:alert]=.
# File lib/action_dispatch/middleware/flash.rb, line 216 def alert=(message) self[:alert] = message end
# File lib/action_dispatch/middleware/flash.rb, line 145 def clear @discard.clear @flashes.clear end
# File lib/action_dispatch/middleware/flash.rb, line 131 def delete(key) @discard.delete key @flashes.delete key self end
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 lib/action_dispatch/middleware/flash.rb, line 197 def discard(k = nil) @discard.merge Array(k || keys) k ? self[k] : self end
# File lib/action_dispatch/middleware/flash.rb, line 150 def each(&block) @flashes.each(&block) end
# File lib/action_dispatch/middleware/flash.rb, line 141 def empty? @flashes.empty? end
# File lib/action_dispatch/middleware/flash.rb, line 100 def initialize_copy(other) if other.now_is_loaded? @now = other.now.dup @now.flash = self end super end
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 lib/action_dispatch/middleware/flash.rb, line 188 def keep(k = nil) @discard.subtract Array(k || keys) k ? self[k] : self end
# File lib/action_dispatch/middleware/flash.rb, line 127 def key?(name) @flashes.key? name end
# File lib/action_dispatch/middleware/flash.rb, line 123 def keys @flashes.keys end
Convenience accessor for flash[:notice].
# File lib/action_dispatch/middleware/flash.rb, line 221 def notice self[:notice] end
Convenience accessor for flash[:notice]=.
# File lib/action_dispatch/middleware/flash.rb, line 226 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 lib/action_dispatch/middleware/flash.rb, line 180 def now @now ||= FlashNow.new(self) end
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