A

• after_subscribe,
• after_unsubscribe

B

• before_subscribe,
• before_unsubscribe

O

• on_subscribe,
• on_unsubscribe

实例公共方法

after_subscribe :my_method, unless: :subscription_rejected?

# File actioncable/lib/action_cable/channel/callbacks.rb, line 60
def after_subscribe(*methods, &block)
  set_callback(:subscribe, :after, *methods, &block)
end

# File actioncable/lib/action_cable/channel/callbacks.rb, line 69
def after_unsubscribe(*methods, &block)
  set_callback(:unsubscribe, :after, *methods, &block)
end

# File actioncable/lib/action_cable/channel/callbacks.rb, line 48
def before_subscribe(*methods, &block)
  set_callback(:subscribe, :before, *methods, &block)
end

# File actioncable/lib/action_cable/channel/callbacks.rb, line 65
def before_unsubscribe(*methods, &block)
  set_callback(:unsubscribe, :before, *methods, &block)
end