how to convert my view table into excel format

I am new in ruby on rails, I want to export my view table in excel format, I have tried so many times but I can not able to export view table. I have a view (Employee_Information) in my database and all data displaying into view.html.erb page, there is no specific model for Employee_Information view. I have follow this tutorial "http://ift.tt/MmX2RS", but I this tutorial export data into excel from view table with the help of model, I want to with out model.

**excel_file.html.erb**
`<table border=1>
  <tr>
    <th>Employee ID</th>
    <th>Name</th>
    <th>Gender</th>
    <th>Date of birth</th>
    <th>Email</th>
    <th>Marital status</th>
    <th>Father Name</th>
    <th>Spouse Name</th>
    <th>Contact</th>
    <th>Employee Address</th>
    <th>Account Number</th>
    <th>IFSC Code</th>
    <th>PAN Number</th>
    <th>Client Name</th>
    <th>Designation</th>
    <th>Employee Type</th>
    <th>Status</th>
    <th>Joining date</th>
    <th>End date</th>
    <th>Offer CTC</th>
    <th>Client Address</th>    
  </tr>
  <% @employees.each do |emp| %>   
    <tr>
       <th><%= emp['employee_id'] %></th>
        <th><%= emp['full_name'] %></th>
        <th><%= emp['gender'] %></th>
        <th><%= emp['dob_date'] %></th>
        <th><%= emp['email'] %></th>
        <th><%= emp['married_status'] %></th>
        <th> <%= emp['father_name'] %></th>
        <th><%= emp['spouse_name'] %></th>
        <th><%= emp['contact_phone'] %></th>
        <th><%= emp['candidate_address2'] %></th>
        <th><%= emp['bank_ac'] %></th>
        <th><%= emp['bank_ifsc'] %></th>
        <th><%= emp['pan_number'] %></th>
        <th><%= emp['company_name'] %></th>
        <th><%= emp['designation'] %></th>
        <th>
            <% if emp['employee_type'] == 0 %>
                Internal Employee
            <% elsif emp['employee_type'] == 1 || emp['employee_type'] == 2 || emp['employee_type'] == 3 %>
                Contract Consultant Employee
            <% elsif emp['employee_type'] == 4 %>
                Permanent Consultant Employee
            <% elseif emp['employee_type'] == 5 %>
                Past Employee
            <% end %> 
        </th>
        <th>
            <% if emp['status'] == 0 %>
                Pending
            <% elsif emp['status'] == 1 %>
                Approved
            <% elsif emp['status'] == 2 %>
                Cancelled
            <% elsif emp['status'] == 3 %>
                Accepted
            <% elsif emp['status'] == 4 %>
                Rejected
            <% elsif emp['status'] == 5 %>
                Onboarded
            <% elsif emp['status'] == 6 %>
                Offboarded
            <% end %> 
        </th>
        <th><%= emp['joining_date'] %></th>
        <th><%= emp['work_end_date'] %></th>
        <th><%= emp['ctc'] %></th>
        <th><%= emp['client_address2']%></th>  
    </tr>
  <% end %>  
</table>
<br><br>`

**hr_controller.rb**`def excel_file
        @employees = MysqlConnection.connection.select_all("SELECT * FROM         Employee_Information where employee_type IN(0)")
        #@employees = MysqlConnection.connection.select_all("SELECT * FROM Employee_Information where employee_type IN(1,2,3)")
        respond_to do |format|
            format.html
            format.csv { send_data @employees.to_csv }
        end
    end`
**application.rb**



  require File.expand_path('../boot', __FILE__)
     # add HR role
     require "csv"

I have created a file module "employee_information.rb" into lib folder

  module EmployeeInformation    
      def self.to_csv(options = {})
        CSV.generate(options) do |csv|
            csv << column_names
            all.each do |product|
              csv << product.attributes.values_at(*column_names)
            end
        end
    end end