Question

我想检查用于过滤的请求是否为空，因此如果为null则显示数据表中的所有数据，否则根据请求的值过滤结果

这里控制器

  public function getCustomFilterData(Request $request)
  {
   $arrStart = explode("/", Input::get('start_date'));
    $arrEnd = explode("/", Input::get('end_date'));
    $start = Carbon::create($arrStart[2], $arrStart[0], $arrStart[1], 0, 0, 0);
    $end = Carbon::create($arrEnd[2], $arrEnd[0], $arrEnd[1], 23, 59, 59);

$min = $request->start_amount;
  $max = $request->end_amount;

     $vendorTableName= with(new Vendors())->getTable();
   $categoryTableName= with(new Excategories())->getTable();
 $orders =Checks::select(["checks.*","vendors.vendor_name","excategories.category_name"])->Wherebetween('amount',[$min,$max])->between($start, $end)->leftJoin($vendorTableName,$vendorTableName.".vendor_id","=","checks.vendor_id")->leftJoin($categoryTableName,$categoryTableName.".category_id","=","checks.category_id");
return Datatables::of($orders)->make( TRUE );
}

Answer 1

如果您想确定请求中是否存在值且非空，则可以使用the has方法：

  select: map(p, [^dynamic_value, customer: ^dynamic_value])

if ($request->has('name')) {
    //
}

Answer 2

虽然我有点晚了，但是如果有人想检查$request的所有值，那么可以这样做

if( !empty($request->has( $request->all() )) ){
    //the value is edited,the above condition returns true if $request has value
}
Else{
    return redirect()->back()->with('warning', 'No Value Edited.');

}

在视图

中

@if ($message = Session::get('success'))
                        <div class="alert alert-success alert-dismissable">
                            <button type="button" class="close" data-dismiss="alert" aria-hidden="true">&times;</button>
                            <strong>Enjoy!&emsp;</strong>{{ $message }}.
                        </div>
                    @endif
                    @if ($message = Session::get('warning'))
                        <div class="alert alert-warning alert-dismissable">
                            <button type="button" class="close" data-dismiss="alert" aria-hidden="true">&times;</button>
                            <strong>Caution!&emsp;</strong>{{ $message }}.
                        </div>
                    @endif

Laravel如何检查datatable ajax发送的请求是否为null

2 个答案: