如何在 Laravel 中写给定 SQL 查询

Question

如何在 Laravel 查询中写下 SQL 查询

SELECT
    notifications.*,
    if(notifications.branchID=0, 'All', (
        select
            group_concat(name)
        from
            branches
        where
            find_in_set(id,notifications.branchID)
    )) as brcName
FROM
    notifications
WHERE
    id = 2

Answer 1

询问：

SELECT
    notifications.*,
    if(notifications.branchID=0, 'All', (
        select
            group_concat(name)
        from
            branches
        where
            find_in_set(id,notifications.branchID)
    )) as brcName
FROM
    notifications
WHERE
    id = 2

---

查询生成器：

DB::table('notifications')
->select('notifications.*')
->addSelect(DB::raw("if(notifications.branchID=0, 'All', (
        select
            group_concat(name)
        from
            branches
        where
            find_in_set(id,notifications.branchID)
    )) as brcName"))
->where('id', 2);

---

Eloquent model：

class Notification extends Model
{
    public function getBrcNameAttribute()
    {
        if ($this->branchID === 0) {
            return 'All';
        }

        return $this->branches()->select('group_concat(name) AS brcName')->first()->brcName;
    }

    public function branches()
    {
        return $this->hasMany(\App\Models\Branch::class);
    }
}

Answer 2

$id = some_id; $query = DB::select( DB::raw("SELECT notifications.*, if(notifications.branchID=0,'All',(select group_concat(name) FROM branches where find_in_set(id,notifications.branchID))) as brcName FROM notifications WHERE id = :id"), array('id' => $id) );