rails_admin new action not shown on web UI <p>My rails_admin new action button is not shown on web UI.</p> <p>My Initializers file</p> <pre><code>RailsAdmin.config do |config| config.actions do dashboard # mandatory index # mandatory new export # bulk_delete show edit delete do except ['Admin'] end end end </code></pre> <p>My admin_ability file</p> <pre><code>class AdminAbility include CanCan::Ability def initialize(user) roles = user.roles.collect(&amp;:name) if !roles.blank? can :access, :rails_admin can :dashboard if roles.include?('admin') can :manage, [Admin, Music, Hobby, Cuisine] can :read, [User] end end end end </code></pre> <p>My Model:</p> <pre><code>class Music include Mongoid::Document include Mongoid::Timestamps field :name, :type =&gt; String mount_base64_uploader :image, AvatarUploader index({updated_at: -1}) index({created_at: -1}) validates :name, :presence =&gt; true has_and_belongs_to_many :users rails_admin do list do field :id field :name end show do field :_id field :name field :image end create do field :name field :image end edit do field :image end end end </code></pre> <p>My Gemfile.lock</p> <pre><code> rails_admin (0.8.1) </code></pre> <p>There is no option to add new music.</p> <p>I have tried to do only method in initializer file by doing </p> <pre><code> new do only [Music] end </code></pre> <p>Help is appreciated.</p>