为减少分页的Ajax调用而对数据进行管道传输时,不会显示第二个调用的表数据

如何解决为减少分页的Ajax调用而对数据进行管道传输时,不会显示第二个调用的表数据

我正在尝试实现dataTable.pipeline。 在页面加载时,数据正确显示在表中,但是在单击(搜索,下一个,无条目)时,它正在获取json数据,但未显示。 它仅在第二次调用服务器时发生。 它只显示:正在处理...

我的代码如下:

<div class="table-responsive">
    <div class="row">
        <div class="col-sm-12 manage-stl">
            <table id="example" class="display zero-configuration" style="width:100%">
                <thead>
                    <tr>
                        <th>#</th>
                        <th>FIRST NAME</th>
                        <th>LAST NAME</th>
                        <th>ADDED ON</th>
                        <th>PHONE NUMBER</th>
                        <th>EMAIL ID</th>
                        <th>STATUS</th>
                        <th>ACTION</th>
                    </tr>
                </thead>
                <tfoot>
                    <tr>
                        <th>#</th>
                        <th>FIRST NAME</th>
                        <th>LAST NAME</th>
                        <th>ADDED ON</th>
                        <th>PHONE NUMBER</th>
                        <th>EMAIL ID</th>
                        <th>STATUS</th>
                        <th>ACTION</th>
                    </tr>
                </tfoot>
            </table>
        </div>
    </div>
</div>
<script type="text/javascript">
        //
    // Pipelining function for DataTables. To be used to the `ajax` option of DataTables
    //
    $.fn.dataTable.pipeline = function ( opts ) {
        // Configuration options
        var conf = $.extend( {
            pages: 5,// number of pages to cache
            url: '',// script url
            data: null,// function or object with parameters to send to the server
                          // matching how `ajax.data` works in DataTables
            method: 'GET' // Ajax HTTP method
        },opts );
     
        // Private variables for storing the cache
        var cacheLower = -1;
        var cacheUpper = null;
        var cacheLastRequest = null;
        var cacheLastJson = null;
     
        return function ( request,drawCallback,settings ) {
            var ajax          = false;
            var requestStart  = request.start;
            var drawStart     = request.start;
            var requestLength = request.length;
            var requestEnd    = requestStart + requestLength;
             
            if ( settings.clearCache ) {
                // API requested that the cache be cleared
                ajax = true;
                settings.clearCache = false;
            }
            else if ( cacheLower < 0 || requestStart < cacheLower || requestEnd > cacheUpper ) {
                // outside cached data - need to make a request
                ajax = true;
            }
            else if ( JSON.stringify( request.order )   !== JSON.stringify( cacheLastRequest.order ) ||
                      JSON.stringify( request.columns ) !== JSON.stringify( cacheLastRequest.columns ) ||
                      JSON.stringify( request.search )  !== JSON.stringify( cacheLastRequest.search )
            ) {
                // properties changed (ordering,columns,searching)
                ajax = true;
            }
             
            // Store the request for checking next time around
            cacheLastRequest = $.extend( true,{},request );
     
            if ( ajax ) {
                // Need data from the server
                if ( requestStart < cacheLower ) {
                    requestStart = requestStart - (requestLength*(conf.pages-1));
     
                    if ( requestStart < 0 ) {
                        requestStart = 0;
                    }
                }
                 
                cacheLower = requestStart;
                cacheUpper = requestStart + (requestLength * conf.pages);
     
                request.start = requestStart;
                request.length = requestLength*conf.pages;
                request._token = "{{ csrf_token() }}";
     
                // Provide the same `data` options as DataTables.
                if ( typeof conf.data === 'function' ) {
                    // As a function it is executed with the data object as an arg
                    // for manipulation. If an object is returned,it is used as the
                    // data object to submit
                    var d = conf.data( request );
                    if ( d ) {
                        $.extend( request,d );
                    }
                }
                else if ( $.isPlainObject( conf.data ) ) {
                    // As an object,the data given extends the default
                    $.extend( request,conf.data );
                }
     
                return $.ajax( {
                    "type":     conf.method,"url":      conf.url,"data":     request,"dataType": "json","cache":    false,"success":  function ( json ) {
                        console.log(json);
                        cacheLastJson = $.extend(true,json);
                        console.log("drawStart:"+drawStart);
                        if ( cacheLower != drawStart ) {
                            console.log("first");
                            json.data.splice( 0,drawStart-cacheLower );
                        }
                        if ( requestLength >= -1 ) {
                            console.log("second");
                            json.data.splice( requestLength,json.data.length );
                        }
                         
                        drawCallback( json );
                    }
                } );
            }
            else {
                json = $.extend( true,cacheLastJson );
                json.draw = request.draw; // Update the echo for each response
                json.data.splice( 0,requestStart-cacheLower );
                json.data.splice( requestLength,json.data.length );
     
                drawCallback(json);
            }
        }
    };
     
    // Register an API method that will empty the pipelined data,forcing an Ajax
    // fetch on the next draw (i.e. `table.clearPipeline().draw()`)
    $.fn.dataTable.Api.register( 'clearPipeline()',function () {
        return this.iterator( 'table',function ( settings ) {
            settings.clearCache = true;
        } );
    } );
     
     
    //
    // DataTables initialisation
    //
    $(document).ready(function() {
        $('#example').DataTable( {
            "processing": true,"serverSide": true,// "order": [],"ajax": $.fn.dataTable.pipeline( {
                url: "{{route('admin.client.getAjaxDatatableList')}}",pages: 2 // number of pages to cache
            } )
        } );
    } );
</script>

我还包括了这3个:

https://code.jquery.com/jquery-3.5.1.js

https://cdn.datatables.net/1.10.22/js/jquery.dataTables.min.js

https://cdn.datatables.net/1.10.22/css/jquery.dataTables.min.css

请帮助我解决这个问题。

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