Question

我得到了未初始化的常量DeviseController，我明确要求在Rails项目中使用Devise gem，而不是在application.rb中使用Bundle.require

在application_controller.rb中有以下内容：

SELECT 
 t.NAME AS TableName,
 i.name AS indexName,
 SUM(p.rows) AS RowCounts,
 SUM(a.total_pages) AS TotalPages, 
 SUM(a.used_pages) AS UsedPages, 
 SUM(a.data_pages) AS DataPages,
 (SUM(a.total_pages) * 8) / 1024 AS TotalSpaceMB, 
 (SUM(a.used_pages) * 8) / 1024 AS UsedSpaceMB, 
 (SUM(a.data_pages) * 8) / 1024 AS DataSpaceMB
FROM 
 sys.tables t
INNER JOIN  
 sys.indexes i ON t.OBJECT_ID = i.object_id
INNER JOIN 
 sys.partitions p ON i.object_id = p.OBJECT_ID AND i.index_id = p.index_id
INNER JOIN 
 sys.allocation_units a ON p.partition_id = a.container_id
WHERE 
 t.NAME = 'StmALog' AND
 i.OBJECT_ID > 255 AND  
 i.index_id <= 1
GROUP BY 
 t.NAME, i.object_id, i.index_id, i.name 
ORDER BY 
 OBJECT_NAME(i.object_id)

但是devise_controller吗？调用:: DeviseController，由于某种原因未定义。这是怎么回事？

Answer 1

在Rails应用程序中使用require是一个危险信号。除非您在MVC范围之外创建自己的功能（通常将其放置在lib目录中），否则应很少使用它。

假设您已经安装了devise ...只需删除require和include语句...

class ApplicationController < ActionController::Base
  before_action :configure_permitted_parameters, if: :devise_controller?
end

如果您有一个名为configure_permitted_parameters的私有方法，即...（具有适当的自定义属性和操作），一切都会很好

def configure_permitted_parameters
  devise_parameter_sanitizer.permit(:sign_up, keys: [:username])
end

未初始化的常量DeviseController

1 个答案: