outcome.rb

Document(#70259050585960) expected, got "" which is an instance of String(#70259013172680)


class Notification < ApplicationRecord
  has_and_belongs_to_many :documents
  has_many :users
  has_many :marketers

end

class Document < ApplicationRecord
  belongs_to :document_category
  has_one_attached :file
  has_and_belongs_to_many :notifications
end

class NotificationsDocuments < ApplicationRecord
  belongs_to :document
  belongs_to :notification
end




= f.select(:documents, options_from_collection_for_select(Document.all, 'id', 'name',  f.object.documents), {}, multiple: true, class: 'select2 form-control')