如何使用Laravel 4 Eloquent连接列？

Question

我有一个名为tenantdetailscontains 的表

Tenant_Id | First_Name | Last_Name | ........

我希望通过MySQL的连接功能检索First_Name并Last Name作为一列.所以我写下我controller的内容如下

$tenants = Tenant::orderBy('First_Name')->lists('CONCAT(`First_Name`," ",`Last_Name`)','Tenant_Id');

但结果出现以下错误:

 SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error 
 in your SQL syntax; check the manual that corresponds to your MySQL server
 version for the right syntax to use near '`," ",`First_Name`)`, 
 `Id` from `tenantdetails` order by `F' at line 1 

 (SQL: select `CONCAT(`First_Name`," ",`Last_Name`)`, `Id` 
 from `tenantdetails` order by `First_Name` asc).

如何在Laravel Eloquent中调用MySQL函数时避免反引号.我只对Eloquent感兴趣(不是在流利的查询中).提前致谢.

更新

感谢@Andreyco帮助我.我们可以使用Laravel模型以更优雅的方式实现此目的,如下所示:

在我们的model:

public function getTenantFullNameAttribute()
{
    return $this->attributes['First_Name'] .' '. $this->attributes['Last_Name'];
}

在我们的controller:

$tenants = Tenant::orderBy('First_Name')->get();
$tenants = $tenants->lists('TenantFullName', 'Tenant_Id');

Answer 1

Tenant::select('Tenant_Id', DB::raw('CONCAT(First_Name, " ", Last_Name) AS full_name'))
    ->orderBy('First_Name')
    ->lists('full_name', 'Tenant_Id');

Answer 2

一个简单的方法是使用selectRaw.它由Tailor实施Jan 30, 2014

资源

Tenant::selectRaw('CONCAT(First_Name, " ", Last_Name) as TenantFullName, id')->orderBy('First_Name')->lists('TenantFullName', 'id'))