Module: ActionCableNotifications::Callbacks::ClassMethods

Defined in:
lib/action_cable_notifications/callbacks.rb

Instance Method Summary collapse

Instance Method Details

#broadcast_notifications_from(broadcasting, options = nil) ⇒ Object

Sets or removes notificacions options for Active Record model

Parameters:

  • broadcasting (sym) —

    Topic name to broadcast in

  • options (hash) (defaults to: nil) —

    Hash containing notification options



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# File 'lib/action_cable_notifications/callbacks.rb', line 24

def broadcast_notifications_from ( broadcasting, options = nil )
  if options.present?
    # Default options
    options = {
      actions: [:create, :update, :destroy],
      scope: :all             # Default collection scope
      }.merge(options)

    self.ActionCableNotificationsOptions[broadcasting.to_sym] = options
  else
    self.ActionCableNotificationsOptions.except! broadcasting.to_sym
  end
end

#notify_initial(broadcasting) ⇒ Hash

Retrieves initial values to be sent to clients upon subscription

collection: self.model_name.collection,
msg: 'add_collection',
data: self.scoped_collection(options[:scope])

Parameters:

  • broadcasting (Sym) —

    Name of broadcasting stream

Returns:

  • (Hash) —

    Hash containing the results in the following format:



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# File 'lib/action_cable_notifications/callbacks.rb', line 61

def notify_initial ( broadcasting )
  options = self.ActionCableNotificationsOptions[broadcasting.to_sym]
  if options.present?
    {
      collection: self.model_name.collection,
      msg: 'add_collection',
      data: self.scoped_collection(options[:scope])
    }
  end
end

#scoped_collection(scope = :all) ⇒ ActiveRecordRelation

Returns collection scoped as specified in parameters.

example: [[:limit, 5], [:order, :id]]

Parameters:

  • scope (Array) (defaults to: :all) —

    Contains the scopes to be applied. For

Returns:

  • (ActiveRecordRelation) —

    Results fetched from the database



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# File 'lib/action_cable_notifications/callbacks.rb', line 46

def scoped_collection ( scope=:all )
  Array(scope).inject(self) {|o, a| o.try(*a)}
end