如何在查询中为 eloquent 模型起别名

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【中文标题】如何在查询中为 eloquent 模型起别名【英文标题】:How to alias eloquent models in a query 【发布时间】:2016-05-24 18:16:11 【问题描述】:

你如何给一个雄辩的模型起别名?例如,如果我有如下 SQL 查询:

SELECT one.name
     , one.id
     , one.name AS sortkey1
     , CAST(NULL AS UNSIGNED) AS sortkey2
     , CAST(NULL AS UNSIGNED) AS sortkey3
 FROM locations AS one
WHERE one.parent_id = 0
UNION ALL
....

在我的存储库中,我会有以下内容:

$first = $this->model->where('one.parent_id', '=', 0)
                     ->select('one.name'
                           , 'one.id'
                           , 'one.name AS sortkey1'
                           , DB::raw('CAST(NULL AS UNISIGNED) AS sortkey2')
                           , DB::raw('CAST(NULL AS UNISIGNED) AS sortkey3'));

那么,如何给模型起别名。在上面的示例中,模型映射了位置表,并且在我雄辩的查询中,我想将其别名为 one 而不是 locations

【问题讨论】:

【参考方案1】:

你可以这样使用from

$first = $this->model->from('locations as one')
                     ->where('one.parent_id', '=', 0)
                     ->select('one.name'
                           , 'one.id'
                           , 'one.name AS sortkey1'
                           , DB::raw('CAST(NULL AS UNISIGNED) AS sortkey2')
                           , DB::raw('CAST(NULL AS UNISIGNED) AS sortkey3'));

【讨论】:

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