Problems with routing based on roles of a User model

employees index.html.erb

<p id="notice"><%= notice %></p>

<h1>Listing Employees</h1>

<table>
  <thead>
    <tr>
      <th colspan="5"></th>
    </tr>
  </thead>

  <tbody>
    <% @employees.each do |employee| %>
      <tr>
        <td><%= employee.name %></td>
        <td><%= employee.email %></td>
        <td><%= link_to 'Show', employee %></td>
        <td><%= link_to 'Edit', edit_employee_path(employee) %></td>
        <td><%= link_to 'Destroy', employee, method: :delete, data: { confirm: 'Are you sure?' } %></td>
      </tr>
    <% end %>
  </tbody>
</table>

<br>

<%= link_to 'New Employee', new_employee_path %>

EmployeesController.rb

class EmployeesController < ApplicationController
  before_action :authenticate_user!
  before_action :set_employee, only: [:show, :edit, :update, :destroy]

  def index
    @employees = current_user.employees.all  # I guess the problem is that this returns a collection
                                             # of User objects. But the url_helper will expect objects
                                             # of class Employee (which does not exist).
  end

Error Output of the employees view

undefined method `user_path' for #<#<Class:0x007f80193c8778>:0x007f8011fd7f30>

Extracted source(around line #17):
        <td><%= employee.name %></td>
        <td><%= employee.email %></td>
        <td><%= link_to 'Show', employee %></td>
        <td><%= link_to 'Edit', edit_employee_path(employee) %></td>
        <td><%= link_to 'Destroy', employee, method: :delete, data: { confirm: 'Are you sure?' } %></td>
      </tr>

rake routes

                                     Prefix Verb   URI Pattern                                            Controller#Action
                               user_session POST   /users/sign_in(.:format)                               devise/sessions#create
                       destroy_user_session DELETE /users/sign_out(.:format)                              devise/sessions#destroy
                              user_password POST   /users/password(.:format)                              devise/passwords#create
                          new_user_password GET    /users/password/new(.:format)                          devise/passwords#new
                         edit_user_password GET    /users/password/edit(.:format)                         devise/passwords#edit
                                            PATCH  /users/password(.:format)                              devise/passwords#update
                                            PUT    /users/password(.:format)                              devise/passwords#update
                   cancel_user_registration GET    /users/cancel(.:format)                                registrations#cancel
                          user_registration POST   /users(.:format)                                       registrations#create
                      new_user_registration GET    /users/sign_up(.:format)                               registrations#new
                     edit_user_registration GET    /users/edit(.:format)                                  registrations#edit
                                            PATCH  /users(.:format)                                       registrations#update
                                            PUT    /users(.:format)                                       registrations#update
                                            DELETE /users(.:format)                                       registrations#destroy

                                    employees GET    /employees(.:format)                                   employees#index
                                            POST   /employees(.:format)                                     employees#create
                                 new_employee GET    /employees/new(.:format)                               employees#new
                                edit_employee GET    /employees/:id/edit(.:format)                          employees#edit
                                     employee GET    /employees/:id(.:format)                               employees#show
                                            PATCH  /employees/:id(.:format)                                 employees#update
                                            PUT    /employees/:id(.:format)                                 employees#update
                                            DELETE /employees/:id(.:format)                                 employees#destroy

User.rb

class User < ActiveRecord::Base
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable

  has_many :roles  # employee or manager

  has_many :employee_engagements_as_manager, class_name: "EmployeeEngagement", foreign_key: :manager_id
  has_many :employees, through: :employee_engagements_as_manager 

  def self.all_employees
  	User.joins(:roles).where(roles: {role:'employee'}).uniq
  end

  # ....snip....
end