ERROR

ActiveRecord::EagerLoadPolymorphicError at /students
Can not eagerly load the polymorphic association :loginable

<% @table.each do |s| %>

index.html.erb

<div class="span12">

  <%= form_tag(students_path, :method=>'get') do %>
      <%= select_tag 'id', options_for_select(@users_array_id), { :prompt => 'Student'} %>
      <%= select_tag 'program', options_for_select(@users_array_program), { :prompt => 'Program'} %>
      <%= submit_tag 'Submit', :class => 'btn btn-primary' %>
  <% end %>



    <table class="table table-condensed table-bordered table-striped">
    <tr>
        <th>ID</th>
        <th>First</th>
        <th>Middle</th>
        <th>Last</th>
        <th>UID</th>
        <th>Email</th>
        <th>Social</th>
        <th>Sex</th>
        <th>DOB</th>
        <th>Address</th>
        <th>City</th>
        <th>State</th>
        <th>Zip</th>
        <th>Home</th>
        <th>Work</th>
        <th>Mobile</th>
        <th>Case No</th>
        <th>Program</th>
        <th>Type</th>
        <th>Edit</th>
    </tr>
    </thead>



<% @p.each do |s| %>
    <tbody>
     <tr>
      <td><%= s.loginable.id %></td>
      <td><%= s.first_name %></td>
      <td><%= s.middle_name %></td>
      <td><%= s.last_name %></td>
      <td><%= s.id %></td>
      <td><%= s.email %></td>
      <td><%= s.social_security_no %></td>
      <td><%= s.sex %></td>
      <td><%= s.date_of_birth %></td>
      <td><%= s.street_address %></td>
      <td><%= s.city %></td>
      <td><%= s.state %></td>
      <td><%= s.postal_code %></td>
      <td><%= s.home_phone %></td>
      <td><%= s.work_phone %></td>
      <td><%= s.mobile_phone %></td>

      <td><%= s.loginable.case_no %></td>
      <td><%= s.loginable.program %></td>
      <td><%= s.loginable_type %></td>
      <td><%= link_to "Edit",  edit_student_path(@student, id: s.loginable.id) %></td>
     </tr>
   </tbody>
<% end %>


</table>

</div>

student.rb

class Student < ActiveRecord::Base

  has_one :user, as: :loginable, dependent: :destroy

  has_many :drug_assessments, dependent: :destroy


  accepts_nested_attributes_for :user


end

students_controller.rb

class StudentsController < ApplicationController

  def create
    @student = Student.new(student_params)
    @user = User.new(user_params)
    @student.save!
    @user.loginable = @student
    @user.save!
    redirect_to root_url
  end

  def new
    @student = Student.new
    @user = @student.build_user
  end

  def edit

    @student = Student.find(params[:id])
    @user = @student.user

  end

  def update
    #authorize! :update, @student, :message => 'Not authorized as an administrator.'
    @student = Student.find(params[:id])
    @user = User.find(@student.user.id)

    @student.update(student_params)
    @user.update(user_params)


    if @student.update(student_params) || @user.update(user_params)
      redirect_to students_path, :notice => "Student updated."
    else
      redirect_to students_path, :alert => "Unable to update student."

    end
  end

  def index

    @users_array_id = User.where(loginable_type: 'Student').includes(:loginable).all.map { |u| [u.name, u.loginable.id] }
    @users_array_program = User.where(loginable_type: 'Student').includes(:loginable).all.map { |u| [u.loginable.program, u.loginable.program] }

    #if
    #params[:id].present?
    #  @sid = params[:id]
    #else
    #  @sid = 3
    #end

    if
    params[:program].present?
      @program = params[:program]
    else
      @program = 'Web'
    end

    @p = User.includes(:loginable).where(loginable_type: 'Student').where(:loginable => {program: 'Web'})

    #.where(:loginable => {program: 'Web'})
    #.where("students.program = 'Web'")

  end


  private

  def student_params
    params.require(:student).permit(:case_no, :program, :admission_status, :temporary_password, :admission_date)

  end
  def user_params
    params.require(:user).permit(:email, :password, :password_confirmation, :name, :first_name, :middle_name, :last_name, :social_security_no, :sex, :date_of_birth, :street_address, :city, :state, :postal_code, :home_phone, :work_phone, :mobile_phone, :message_id, :password_confirmation)

  end

end

user.rb

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

  belongs_to :loginable, polymorphic: true



end