Laravel Eloquent - 无法使用数组获取列

Question

我正在使用 laravel eloquent 从多个列中获取数据。我正在使用数组从多个列中获取数据。为简单起见，我显示了两列的数据。这是我的数据库表，其中包含callee_number和caller_number：这是我使用数组来获取列的代码：    $paramArray = $params->all();    $Caller_number = "";    $Callee_number = "";    if (isset($paramArray['Caller_number']) && $paramArray['Caller_number'] != '') {        $Caller_number = $params->input('Caller_number');    }    if (isset($paramArray['Callee_number']) && $paramArray['Callee_number'] != '') {        $Callee_number = $params->input('Callee_number');    }    if($Caller_number!=null){        $querypart[] = "caller_number=$Caller_number";    }    if($Callee_number!=null){        $querypart[] = "callee_number=$Callee_number";    }    $FinalQueryPart = '';    if (!empty($querypart)) {                $Seprator = "";        foreach ($querypart as $querypartValue) {            $FinalQueryPart .= $Seprator . $querypartValue;            $Seprator = " AND ";        }    }    $FinalQueryPart = trim($FinalQueryPart); //Output: "caller_number=783 AND callee_number=77"    但是，在上面的代码之后运行以下代码后，我收到错误：    $gets = Tbcdrnew::where(function ($query) use ($FinalQueryPart) {        $query->MIN('uniqueid')->where($FinalQueryPart)            ->from('cdrnew');                })->groupBy('uniqueid')->orderBy('Start_Date','DESC')->get();错误如下：Illuminate\Database\QueryException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'caller_number=783 AND callee_number=77' in 'where clause' (SQL: select * from `cdrnew` where (`caller_number=783 AND callee_number=77` is null) group by `uniqueid`不明白我的代码中有什么问题。有人可以纠正我吗？

Answer 1

我认为您在查询中犯了一个错误。将以下行替换为这些行：

if($Caller_number!=null){

    $querypart[] = "caller_number = '$Caller_number'";

}

if($Callee_number!=null){

    $querypart[] = "callee_number = '$Callee_number'";

}

$Caller_number（请注意&上的单引号$Callee_number）。

另外，使用该whereRaw()方法而不是where()按照响应评论中建议的方法。

Answer 2

我添加了一个答案，建议一种通过使用 Laravel 集合方法消除所有条件来简化代码的方法if。

$query = Tbcdrnew::query();                           //start a query string based on Tbcdrnew model OR you could do DB::table('cdrnew');

collect($paramArray)->filter(function($value, $key){  //convert paramArray into a collection

    return $value != '';                              //filter all null and empty values

})->each(function($value, $key) use ($query){         //iterate through all filtered values

    $query->where(strtolower($key), $value);          //assuming array key is always column key in lowercase

});

$result = $query->groupBy('uniqueid')->orderBy('start_date','desc')->get();

我不确定$query->MIN您的原始查询中是否有有效的查询生成器函数。