错误：SQLSTATE [42S22]：未找到列：1054

Question

当我运行我的烘焙表（WampServer MySQL 数据库）时，我收到此错误：

错误：SQLSTATE[42S22]：找不到列：1054 'on 子句'中的未知列 'Users.user_id'

如果您使用 SQL 关键字作为表列名，您可以在 config/app.php 中为您的数据库连接启用标识符引用。

SQL 查询：

SELECT `Bookmarks`.`id` AS `Bookmarks__id`, 
       `Bookmarks`.`user_id` AS `Bookmarks__user_id`, 
       `Bookmarks`.`title` AS `Bookmarks__title`, 
       `Bookmarks`.`description` AS `Bookmarks__description`, 
       `Bookmarks`.`url` AS `Bookmarks__url`, 
       `Bookmarks`.`created` AS `Bookmarks__created`, 
       `Bookmarks`.`modified` AS `Bookmarks__modified`,
       `Users`.`id` AS `Users__id`, 
       `Users`.`email` AS `Users__email`, 
       `Users`.`password` AS `Users__password`, 
       `Users`.`created` AS `Users__created`, 
       `Users`.`modified` AS `Users__modified` 
FROM `bookmarks` `Bookmarks` 
    INNER JOIN `users` `Users` ON 
            `Users`.`user_id` = (`Bookmarks`.`user_id`) 
LIMIT 20 OFFSET 0

如果您想自定义此错误消息，请创建src\Template\Error\pdo_error.ctp。

Answer 1

在您的用户表中，主 ID 是 id 而不是 user_id；这就是为什么你得到一个错误。试试这个查询：

SELECT `Bookmarks`.`id` AS `Bookmarks__id`, 
       `Bookmarks`.`user_id` AS `Bookmarks__user_id`, 
       `Bookmarks`.`title` AS `Bookmarks__title`, 
       `Bookmarks`.`description` AS `Bookmarks__description`, 
       `Bookmarks`.`url` AS `Bookmarks__url`, 
       `Bookmarks`.`created` AS `Bookmarks__created`, 
       `Bookmarks`.`modified` AS `Bookmarks__modified`,
       `Users`.`id` AS `Users__id`, 
       `Users`.`email` AS `Users__email`, 
       `Users`.`password` AS `Users__password`, 
       `Users`.`created` AS `Users__created`, 
       `Users`.`modified` AS `Users__modified` 
FROM `bookmarks` `Bookmarks` 
    INNER JOIN `users` `Users` ON 
            `Users`.`id` = `Bookmarks`.`user_id`
LIMIT 20 OFFSET 0