mysql - 如何将我的 View 表转换成excel格式

Question

我是 ruby​​ on rails 的新手，我想以 excel 格式导出我的 View 表，我已经尝试了很多次，但我无法导出 View 表。 我的数据库中有一个 View (Employee_Information)，所有数据都显示在 view.html.erb 页面中，没有针对 Employee_Information View 的特定模型。我遵循了本教程“http://railscasts.com/episodes/362-exporting-csv-and-excel”，但是我本教程在模型的帮助下将数据从 View 表导出到 excel，我想要没有模型。

**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"

我已经在 lib 文件夹中创建了一个文件模块“employee_information.rb”

  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

Answer 1

这个一定要是 View 表吗？除非你把它做成某种形式，否则如果不使用 javascript 解析 DOM(或者更确切地说访问 DOM 中的所有元素)并获取值并使用解析后的信息向 Controller 发出请求，就无法做到这一点DOM。如果您可以制作某种提交表单，那么您可以更轻松地将此信息导出到 excel。无论哪种方式，如果没有某种模型，真的没有另一种方法可以做到这一点。