Laravel 预加载和 LIKE 过滤器

Question

我正在处理一个典型的帐户-> 邮政编码场景。我有 2 个模型 2：帐户和邮政编码，在我添加的帐户中

public function zipcode() {
    return $this->belongsTo(Zipcode::class);
}

index.blade.php是这样的：

<td>{{$account->id}}</td>
  <td>{{$account->fullname}}</td>
  <td>{{$account->address}}</td>
  <td>{{$account->zipcode->fulllocation}}</td>
...

我为 accounts.fullname 中包含的字符串添加了一个过滤器（列表顶部的基本输入文本），所以控制器是这样的：

public function index(Request $request)
 {
   $search = $request->search;
   //The instructions in the closure given to when() will only be applied if the first argument is evaluated to true
   $accounts = Account::with('zipcode')//https://laravel.com/docs/4.2/eloquent#eager-loading
                  ->when($search,function ($query) use ($search) {
                     $query->where('fullname','like','%'.$search.'%');
                     return $query;
                    })
                  ->latest()
                  ->paginate(15);
     return view('accounts.index', compact('accounts'))->with('search',$search);
 }

此时场景已经过测试并且可以正常工作，如果没有插入搜索，则会列出所有帐户，否则结果会被正确过滤。

我的需求是在accounts.fullname或accounts.zipcode.fulllocation中搜索插入的字符串。我尝试以这种方式修改 controller：

$accounts = Account::with('zipcode')//https://laravel.com/docs/4.2/eloquent#eager-loading
    ->when($search,function ($query) use ($search) {
              $query->where('fullname','like','%'.$search.'%');

              $query->orWhere('fulllocation','like','%'.$search.'%');//ADDED THIS

              return $query;
           })
    ->latest()
    ->paginate(15);

当我尝试时出现了这个错误：

SQLSTATE[42S22]: Column not found: 1054 Unknown column 'fulllocation' in 'where clause' (SQL: select count(*) as aggregate from `accounts` where `fullname` like %foo% or `fulllocation` like %foo%)

感谢任何形式的帮助。

Answer 1

您收到该错误的原因是查询在帐户 table 中查找 fulllocation，而实际上它在 zipcodes table 中。

您可以尝试类似的方法：

$query->where('fullname', 'like', '%' . $search . '%')
    ->orWhereHas('zipcode', function ($q) use ($search) {
        $q->where('fulllocation', 'like', '%' . $search . '%');
    });

https://laravel.com/docs/5.3/eloquent-relationships#querying-relationship-existence

希望对您有所帮助！

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