Ruby on rails Mysql2:：错误：“where子句”中的未知列“projects.company_id”

有人能帮我解决这个错误吗

Mysql2::Error: Unknown column 'projects.company_id' in 'where clause': SELECT `projects`.* FROM `projects` WHERE `projects`.`company_id` = 2  ORDER BY position ASC
  Rendered project/index.html.erb within layouts/application (22.4ms)
Completed 500 Internal Server Error in 106ms (ActiveRecord: 89.3ms)

ActionView::Template::Error (Mysql2::Error: Unknown column 'projects.company_id' in 'where clause': SELECT `projects`.* FROM `projects` WHERE `projects`.`company_id` = 2  ORDER BY position ASC):
    12:      <th> Actions </th>
    13:    </tr>
    14: 
    15:    <%= @projects.each do |project| %>
    16:    <tr>
    17:     <td><%= project.company.name if project.company %></td>
    18:     <td><%= project.name %></td>
  app/views/project/index.html.erb:15:in `_app_views_project_index_html_erb__831754569244709537_70147764435580'


  Rendered /Users/ajaysithagari/.rvm/gems/ruby-2.2.1/gems/actionpack-4.2.3/lib/action_dispatch/middleware/templates/rescues/_source.erb (8.2ms)
  Rendered /Users/ajaysithagari/.rvm/gems/ruby-2.2.1/gems/actionpack-4.2.3/lib/action_dispatch/middleware/templates/rescues/_trace.html.erb (4.5ms)
  Rendered /Users/ajaysithagari/.rvm/gems/ruby-2.2.1/gems/actionpack-4.2.3/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb (1.0ms)
  Rendered /Users/ajaysithagari/.rvm/gems/ruby-2.2.1/gems/actionpack-4.2.3/lib/action_dispatch/middleware/templates/rescues/template_error.html.erb within rescues/layout (58.5ms)
  Rendered /Users/ajaysithagari/.rvm/gems/ruby-2.2.1/gems/web-console-2.2.1/lib/web_console/templates/_markup.html.erb (1.0ms)
  Rendered /Users/ajaysithagari/.rvm/gems/ruby-2.2.1/gems/web-console-2.2.1/lib/web_console/templates/_inner_console_markup.html.erb within layouts/inlined_string (0.3ms)
  Rendered /Users/ajaysithagari/.rvm/gems/ruby-2.2.1/gems/web-console-2.2.1/lib/web_console/templates/_prompt_box_markup.html.erb within layouts/inlined_string (0.3ms)
  Rendered /Users/ajaysithagari/.rvm/gems/ruby-2.2.1/gems/web-console-2.2.1/lib/web_console/templates/style.css.erb within layouts/inlined_string (1.1ms)
  Rendered /Users/ajaysithagari/.rvm/gems/ruby-2.2.1/gems/web-console-2.2.1/lib/web_console/templates/console.js.erb within layouts/javascript (44.4ms)
  Rendered /Users/ajaysithagari/.rvm/gems/ruby-2.2.1/gems/web-console-2.2.1/lib/web_console/templates/main.js.erb within layouts/javascript (0.3ms)
  Rendered /Users/ajaysithagari/.rvm/gems/ruby-2.2.1/gems/web-console-2.2.1/lib/web_console/templates/error_page.js.erb within layouts/javascript (0.6ms)
  Rendered /Users/ajaysithagari/.rvm/gems/ruby-2.2.1/gems/web-console-2.2.1/lib/web_console/templates/index.html.erb (98.5ms)

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我猜您只需要将company_id字段添加到项目模型中

rails generate migration AddCompanyIdToProject company_id:integer:index
rake db:migrate

确保项目表具有列company\u id

---

我将你的问题格式化。2发布生成错误的代码。3发布与此相关的ant代码，如模型等。向我们展示您的模型。是否有两种模型称为项目和公司？关系是项目有一个公司，公司有多个项目？请添加更多详细信息，如模型关联，可能您的项目表中没有列company_id谢谢Gaurav Gupta，是的，我可以链接表谢谢重播

rails generate migration AddCompanyIdToProject company:references
rake db:migrate