app/models/dashboard_message.rb
# == Schema Information
#
# Table name: dashboard_messages
#
# created_at :datetime not null
# id :bigint(8) not null, primary key
# message :text
# messageable_id :bigint(8)
# messageable_type :string
# updated_at :datetime not null
#
# Indexes
#
# index_dashboard_messages_on_messageable_type_and_messageable_id (messageable_type,messageable_id) UNIQUE
#
class DashboardMessage < ApplicationRecord
belongs_to :messageable, polymorphic: true
validates :message, presence: true
end