Question

我正在构建一个表来显示订单信息，而我在理解为什么JSON数据在降序排序或更改为表中倒数第二页时返回空白时遇到问题。

当我将某些列从降序升序到升序以及当我尝试转到表的倒数第二页时，会发生解析错误。然而，当我搜索某些东西时，所有的功能都会恢复正常。我尝试查找解决方案并找到一些文章，但没有一个与我的问题完全相同或者甚至接近它并且最近的一个已经关闭（https://datatables.net/forums/discussion/9220/ajax-sort-descending-on-load）。我做错了什么？

您可以在http://aframewerx.com

看到这种情况

JS：

$(document).ready(function(){
  var dataTable = $('#orderTable').DataTable( {
    "processing": true,
    "serverSide": true,
    "pageLength": 10,
    "autoWidth": false,
    "responsive": {
      "details": {
        renderer: function ( api, rowIdx ){
          var data = api.cells( rowIdx, ':hidden' ).eq(0).map( function ( cell ) {
            var header = $( api.column( cell.column ).header() );
            return  '<p style="color:#00A">'+header.text()+' : '+api.cell( cell ).data()+'</p>';
          }).toArray().join('');

          return data ?    $('<table/>').append( data ) :    false;
        }
      }
    },
    "ajax":{
      url :"fetch_data.php", // json datasource
      type: "post",  // method  , by default get
      error: function (request, error) {
        console.log(arguments);
        alert("Error: " + error);
        $(".orderTable-error").html("");
        $("#orderTable").append('<tbody class="orderTable-error"><tr><th colspan="3">No data found in the server</th></tr></tbody>');
        $("#orderTable_processing").css("display","none");
      }
    }

  });

});

PHP：

<?php
$servername = "";
$username = "";
$password = "";
$dbname = "";

$conn = mysqli_connect($servername, $username, $password, $dbname) or die("Connection failed: " . mysqli_connect_error());
$requestData= $_REQUEST;
$columns = array( 
    0 => 'order_date', 
    1 => 'due_ship_date',
    2 => 'ordered_by',
    3 => 'pick_status',
    4 => 'order_number',
    5 => 'sku',
    6 => 'qty',
    7 => 'product_title',
    8 => 'variant_title',
    9 => 'product_type',
   10 => 'id'
);

$sql = "SELECT id";
$sql.=" FROM kess_orders";
$query=mysqli_query($conn, $sql) or die("Failed to connect");
$totalData = mysqli_num_rows($query);
$totalFiltered = $totalData; 

$sql = "SELECT order_date,due_ship_date,ordered_by,pick_status,order_number,sku,qty,product_title,variant_title,product_type,id ";
$sql.=" FROM kess_orders WHERE 1=1";
if( !empty($requestData['search']['value']) ) { 
  $sql.=" AND ( order_date LIKE '".$requestData['search']['value']."%' ";    
  $sql.=" OR due_ship_date LIKE '".$requestData['search']['value']."%' ";
  $sql.=" OR ordered_by LIKE '".$requestData['search']['value']."%' ";
  $sql.=" OR pick_status LIKE '".$requestData['search']['value']."%' ";
  $sql.=" OR order_number LIKE '".$requestData['search']['value']."%' ";
  $sql.=" OR sku LIKE '".$requestData['search']['value']."%' ";
  $sql.=" OR product_title LIKE '".$requestData['search']['value']."%' ";

  $sql.=" OR product_type LIKE '".$requestData['search']['value']."%' )";
}
$query=mysqli_query($conn, $sql) or die("Failed to connect");
$totalFiltered = mysqli_num_rows($query);
$sql.=" ORDER BY ". $columns[$requestData['order'][0]['column']]."   ".$requestData['order'][0]['dir']."  LIMIT ".$requestData['start']." ,".$requestData['length']."   ";
$query=mysqli_query($conn, $sql) or die("fetch_orders.php: get order_number");


$data = array();
while( $row=mysqli_fetch_array($query) ) {
  $nestedData=array(); 

  $nestedData[] = '<input type="hidden" value="'.$row["id"].'" name="id">'.$row["order_date"];
  $nestedData[] = $row["due_ship_date"];
  $nestedData[] = $row["ordered_by"];
  $nestedData[] = $row["pick_status"];
  $nestedData[] = $row["order_number"];
  $nestedData[] = $row["sku"];
  $nestedData[] = $row["qty"];
  $nestedData[] = $row["product_title"];
  $nestedData[] = $row["variant_title"];
  $nestedData[] = $row["product_type"];
  $nestedData[] = '<div id=' . $row["id"] . '"><div class="btn-group" id="'.$row["id"].'"><a class="btn dropdown-toggle" data-toggle="dropdown" href="#'.$row["id"].'" style="padding:0px !important;"><div class="wrapper"><div id="'.$row["id"].'" class="top bar"></div><div id="'.$row["id"].'" class="middle bar"></div><div id="'.$row["id"].'" class="bottom bar"></div></div></a> <ul class="dropdown-menu pull-right arrow_box" aria-labelledby="dLabel" style=" margin-right: 35px; top: -6px; min-width:105px;"><li><input type="hidden" value="'.$row["id"].'" name="id"><button class="pull-left  btn btn-danger remove-item button-hover" style="margin-right:10px; margin-left:10px; height: 31px;border-radius: 3px;font-size: 12px;background-color: #2E112D;color:#fff;border:1px solid #2E112D;"><i class="fa fa-trash-o" aria-hidden="true"></i></button></li><li><input type="hidden" value="'.$row["id"].'" name="id"><button data-toggle="modal" data-target="#edit-item" class="pull-left button-hover btn btn-primary edit-item" style="margin-right:10px; height: 31px;border-radius: 3px;font-size: 12px;background-color: #2E112D;color:#fff;border:1px solid #2E112D;"><i class="fa fa-pencil" aria-hidden="true"></i></button></li></ul></div></div>';

  $data[] = $nestedData;
}

$json_data = array(
      "draw"            => intval( $requestData['draw'] ),
      "recordsTotal"    => intval( $totalData ),
      "recordsFiltered" => intval( $totalFiltered ),
      "data"            => $data
      );

echo json_encode($json_data); 
?>

错误：

"parsererror", SyntaxError: Unexpected end of JSON input at parse

Json使用DataTables解析错误

0 个答案: