ruby - Displaying Current User in view through a polymorphic association -

i attempting display current users name once logged in.

therefore @ top of page "logged in patrick". have polymorphic association set whereby every user signs either player or coach.

the polymorphic association under label or :tennis_player both coach , player play tennis.

the code view below.

    <div class="container">     <header>      <div class="logo">         <%= link_to(image_tag 'tennis_ball.png', :width => 100, :height => 100) %>     </div>     <div class="slogan">         <h3>setfortennis</h3>     </div>     <div id="user_nav">     <% if current_user? %>         logged in <%= @current_user %>          <%= link_to "log out", log_out_path %>     <% else %>         <%= link_to "sign up", sign_up_path %> or         <%= link_to "log in", log_in_path %>     <% end %> </div>      </header> </div> 

here application controller

    helper_method :current_user?    before_filter :get_user    def current_user?     !!current_user   end    def current_user     @current_user ||= session[:user_id] &&       user.find_by_id(session[:user_id])   end    def check_logged_in     redirect_to( new_session_path, :notice => "you must logged in that!") unless current_user?   end    def get_user     @user = user.new   end end 

and here models. else needed solve let me know!

    class player < activerecord::base   attr_accessible :about, :club, :first_name, :last_name, :profile_picture, :racket, :ranking, :image    has_attached_file :image, styles: {     thumb: '100x100>',     square: '200x200#',     medium: '300x300>'   }    has_many :videos    has_one :user, :as => :tennis_player  end     class coach < activerecord::base   attr_accessible :about, :club, :first_name, :last_name, :profile_picture, :ranking    has_one :user, :as => :tennis_player end 

user model.

    class user < activerecord::base   attr_accessible :email, :password_hash, :password_salt, :password, :password_confirmation   attr_accessor :password    belongs_to :tennis_player, :polymorphic => true    before_save :encrypt_password    validates_confirmation_of :password   validates_confirmation_of :password, :on => :create   validates_confirmation_of :email   validates_uniqueness_of :password    def self.authenticate(email, password)     user = find_by_email(email)     if user && user.password_hash == bcrypt::engine.hash_secret(password, user.password_salt)       user      else       nil     end   end    def encrypt_password     if password.present?       self.password_salt = bcrypt::engine.generate_salt       self.password_hash = bcrypt::engine.hash_secret(password, password_salt)     end   end end 

you need store right id whenever create session. change design little. instead of having 2 separate tables player , coach, can create base class user, , inherit it.

class user < activerecord::base   attr_accessible :about, :club, :first_name, :last_name, :profile_picture, :ranking end  class player < user end  class coach < user end