继续为＃获取未定义方法'bio'的未识别方法'bio'(Keep getting unidentified method 'field' for undefined method `bio' for #)

 我刚刚将我的应用程序部署到Heroku，我正面临着这个问题。 在注册页面中： 
 
<div class="field">
    <%= f.label :bio %><br />
    <%= f.text_field :bio %>
  </div>
 
 并在日志中 
 
ActionView::Template::Error (undefined method `bio' for #<User:0x007f5e772493c0>):
<div class="field">
        <%= f.label :bio %><br />
        <%= f.text_field :bio %>
      </div>
 
 有什么想法吗？ 谢谢Ps。 用于在部署之前正常工作 
 
 编辑 
 
 我试图迁移但是我收到了这个错误 
 
Couldn't create database for {"adapter"=>"sqlite3", "pool"=>5, "timeout"=>5000, "database"=>"db/test.sqlite3"}
Specified 'sqlite3' for database adapter, but the gem is not loaded. Add `gem 'sqlite3'` to your Gemfile (and ensure its version is at the minimum required by ActiveRecord).

I just deployed my app to Heroku and I'm facing this problem. In the sign up page:
 
<div class="field">
    <%= f.label :bio %><br />
    <%= f.text_field :bio %>
  </div>
 
and in the logs
 
ActionView::Template::Error (undefined method `bio' for #<User:0x007f5e772493c0>):
<div class="field">
        <%= f.label :bio %><br />
        <%= f.text_field :bio %>
      </div>
 
Any thoughts on this? Thanks Ps. used to work fine before deployment
 
EDIT
 
I tried to migrate but I got this error
 
Couldn't create database for {"adapter"=>"sqlite3", "pool"=>5, "timeout"=>5000, "database"=>"db/test.sqlite3"}
Specified 'sqlite3' for database adapter, but the gem is not loaded. Add `gem 'sqlite3'` to your Gemfile (and ensure its version is at the minimum required by ActiveRecord).

原文：https://stackoverflow.com/questions/39500282