Laravel 将 NULL 放在引号内

Question

我想与 Laravel Eloquent 进行联合查询。当我们进行 UNION 查询时，两个查询中应该有相同数量的 selected 列。要跳过该规则，我想将 select NULL 设为 Column_name，但是 Laravel API 会自动将 NULL 替换为 'Null'，这会导致错误“Null 列不存在”。

如何从 Null 中删除这些自动添加的引号？

这就是我所拥有的：第一个查询：

...->select("Calendars.*","Services.Id as IdService","Services.Name as ServiceName","NULL as Price")

第二个查询：

...->select("Calendars.*","Services.Id as IdService","Services.Name as ServiceName","PaidService.Price")

结果是：

...union (select `Calendars`.*, `Services`.`Id` as `IdService`, `Services`.`Name` as `ServiceName`, `NULL` as `Price` from `Calendars`

非常感谢！

Answer 1

考虑为此使用 DB::raw。它将阻止 laravel 修改语句并按原样解析它。

DB::raw("NULL as Price")

这将进行第一个查询

...->select("Calendars.*",
            "Services.Id as IdService",
            "Services.Name as ServiceName",
            DB::raw("NULL as Price"))

Laravel 将 NULL 放在引号内

Laravel put NULL inside quotes

php

quotes

null

laravel

eloquent