Question

我在Model-＆gt; beforeFind（$ queryData）中，尝试在具有belongsTo关联的模型上向queryData添加JOIN条件。不幸的是，新的JOIN引用了belongsTo关联中的一个表，所以它必须出现在查询中的belongsTo之后。

这是我的Tagged-＆gt; belongsTo协会：

app\plugins\tags\models\tagged.php (line 192)
Array
(
    [Tag] => Array
        (
            [className] => Tag
            [foreignKey] => tag_id
            [conditions] => 
            [fields] => 
            [order] => 
            [counterCache] => 
        )

    [Group] => Array
        (
            [className] => Group
            [foreignKey] => foreign_key
            [conditions] => Array
                (
                    [Tagged.model] => Group
                )

            [fields] => 
            [order] => 
            [counterCache] => 
        )

)

这是在Tagged-＆gt; beforeFind（）中添加的JOIN，注意尚未添加belongsTo连接：

app\plugins\tags\models\tagged.php (line 194)
Array
(
    [conditions] => Array
        (
            [Tag.keyname] => europe
        )

    [fields] => Array
        (
            [0] => DISTINCT Group.*
            [1] => GroupPermission.*
        )

    [joins] => Array
        (
            [0] => Array
                (
                    [table] => permissions
                    [alias] => GroupPermission
                    [foreignKey] => 
                    [type] => INNER
                    [conditions] => Array
                        (
                            [GroupPermission.model] => Group
                            [0] => GroupPermission.foreignId = Group.id
                            [or] => Array
                                ( ... )
                        )

                )

        )

    [limit] => 
    [offset] => 
    [order] => Array
        (
            [0] => 
        )

    [page] => 1
    [group] => 
    [callbacks] => 1
    [by] => europe
    [model] => Group
)

当我检查输出时，它在“on子句”中的“1054：未知列'Group.id'失败”，因为权限连接在组加入之前出现。

    SELECT DISTINCT `Group`.*, `GroupPermission`.*
    FROM `tagged` AS `Tagged`
    INNER JOIN permissions AS `GroupPermission` ON (`GroupPermission`.`model` = 'Group' AND `GroupPermission`.`foreignId` = `Group`.`id` AND (...))
    LEFT JOIN `tags` AS `Tag` ON (`Tagged`.`tag_id` = `Tag`.`id`)
    LEFT JOIN `groups` AS `Group` ON (`Tagged`.`foreign_key` = `Group`.`id` AND `Tagged`.`model` = 'Group')
    WHERE `Tag`.`keyname` = 'europe'

但是这个SQL（加入了Permissions的移动到最后）工作正常：

    SELECT DISTINCT `Group`.*, `GroupPermission`.*
    FROM `tagged` AS `Tagged`
    LEFT JOIN `tags` AS `Tag` ON (`Tagged`.`tag_id` = `Tag`.`id`)
    LEFT JOIN `groups` AS `Group` ON (`Tagged`.`foreign_key` = `Group`.`id` AND `Tagged`.`model` = 'Group')
    INNER JOIN permissions AS `GroupPermission` ON (`GroupPermission`.`model` = 'Group' AND `GroupPermission`.`foreignId` = `Group`.`id` AND (...))
    WHERE `Tag`.`keyname` = 'europe'

如何在belongsTo加入后在beforeFind（）中添加我的联接？

Answer 1

连接不能引用关联中的任何内容，因为关联是通过单独的查询获取的。如果您需要添加引用关联的联接，则还需要在联接中手动添加关联。

Cakephp beforeFind（） - 如何在添加belongsTo关联后添加JOIN条件？

1 个答案: