laravel 如何在laravel eloquent中将int转换为字符串？

How can I convert int to string in laravel eloquent?

提问by samuel toh

My mysql query is like this :

我的 mysql 查询是这样的：

SELECT b.id, b.name, COUNT(*) AS count_store
FROM stores a
JOIN locations b ON CONVERT(b.id,CHAR) = a.address->'$."regency_id"'
GROUP BY b.id
ORDER BY count_store DESC
LIMIT 10 

If mysql query I use this : CONVERT(b.id,CHAR)to convert int to string

如果 mysql 查询我使用这个：CONVERT(b.id,CHAR)将 int 转换为字符串

How can I convert int to string in laravel eloquent? I'm using Laravel 5.3.

如何在laravel eloquent中将int转换为字符串？我正在使用 Laravel 5.3。

I had try like this :

我试过这样的：

$stores = Store::select('locations.name','COUNT(*) AS count_store')
               ->join('locations', 'locations.id', '=', 'stores.address->regency_id')
               ->groupBy('locations.id')
               ->orderBy('count_store', 'desc')
               ->limit(10)
               ->get();

But it does not work

但它不起作用

回答by Tim Biegeleisen

If you want to use a very custom join condition, such as one involving a cast of one or both columns, then I'm not sure this would be possible without at least somekind of raw syntax. Hence, you should consider the answer given by @Rodrane as well as this one:

如果您想使用非常自定义的连接条件，例如涉及一列或两列的强制转换，那么我不确定如果没有至少某种原始语法，这是否可行。因此，您应该考虑@Rodrane 给出的答案以及这个答案：

$stores = Store::select('locations.id', 'locations.name', DB::raw('COUNT(*) AS count_store'))
               ->join('locations', DB::raw("CONVERT(locations.id, CHAR)"), '=', 'stores.address->regency_id')
               ->groupBy('locations.id', 'locations.name')
               ->orderBy('count_store', 'desc')
               ->limit(10)
               ->get();

Note that I made the following changes:

请注意，我进行了以下更改：

• Used DB::raw()to give a custom alias to the count
• Added location.nameto the GROUP BY(and select) clause
• Used another DB::raw()to handle the cast in the join condition

• 用于DB::raw()为计数提供自定义别名
• 添加location.name到GROUP BY（和选择）子句
• 使用另一个DB::raw()来处理连接条件中的转换