如何在查询中为 eloquent 模型设置别名

Question

如何为 eloquent 模型起别名？例如，如果我有一个 SQL 查询如下：

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，我会有如下内容：

$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'));

那么你怎么给模型起别名。在上面的示例中，模型映射位置 table，在我的 eloquent 查询中，我想将其别名为 one 而不是 locations

Answer 1

您可以这样使用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'));