昨晚和今天我一直在敲我的头。我有一个 Laravel 4.2 项目，其中我的一些用户有更大的表（2000+）记录。我想使用 ajax 功能来动态提取数据。我使用了数据表中的 PHP 示例，但在 Firefox 检查器的“网络”选项卡中得到了一个没有响应的“”
这是我在页面上的 jquery：
jQuery(document).ready(function() {
jQuery('#table_large').dataTable({
"processing": true,
"serverSide": true,
"ajax": {
"url": "/pets/records/data/",
"type": "POST"
}
});
});
这是我的路线：
Route::post('/pets/records/data/', 'PetsController@ajax');
这是我的存储库：
public function ajax(){
$aColumns = array( 'custom_id', 'pet_name', 'pet_type', 'age', 'breed','gender','status','intake_date' );
/* Indexed column (used for fast and accurate table cardinality) */
$sIndexColumn = "pet_id";
/* DB table to use */
$sTable = "pets";
/* Database connection information */
$gaSql['user'] = \Config::get('database.connections.mysql.username');
$gaSql['password'] = \Config::get('database.connections.mysql.password');
$gaSql['db'] = \Config::get('database.connections.mysql.database');
$gaSql['server'] = \Config::get('database.connections.mysql.host');
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* If you just want to use the basic configuration for DataTables with PHP server-side, there is
* no need to edit below this line
*/
/*
* Local functions
*/
function fatal_error ( $sErrorMessage = '' )
{
header( $_SERVER['SERVER_PROTOCOL'] .' 500 Internal Server Error' );
die( $sErrorMessage );
}
/*
* MySQL connection
*/
if ( ! $gaSql['link'] = @mysql_pconnect( $gaSql['server'], $gaSql['user'], $gaSql['password'] ) )
{
fatal_error( 'Could not open connection to server' );die();
}
if ( ! mysql_select_db( $gaSql['db'], $gaSql['link'] ) )
{
fatal_error( 'Could not select database ' );die();
}
/*
* Paging
*/
$sLimit = "";
if ( isset( $_POST['iDisplayStart'] ) && $_POST['iDisplayLength'] != '-1' )
{
$sLimit = "LIMIT ".intval( $_POST['iDisplayStart'] ).", ".
intval( $_POST['iDisplayLength'] );
}
/*
* Ordering
*/
$sOrder = "";
if ( isset( $_POST['iSortCol_0'] ) )
{
$sOrder = "ORDER BY ";
for ( $i=0 ; $i<intval( $_POST['iSortingCols'] ) ; $i++ )
{
if ( $_POST[ 'bSortable_'.intval($_POST['iSortCol_'.$i]) ] == "true" )
{
$sOrder .= $aColumns[ intval( $_POST['iSortCol_'.$i] ) ]."
".($_POST['sSortDir_'.$i]==='asc' ? 'asc' : 'desc') .", ";
}
}
$sOrder = substr_replace( $sOrder, "", -2 );
if ( $sOrder == "ORDER BY" )
{
$sOrder = "";
}
}
$sWhere = "";
if ( isset($_POST['sSearch']) && $_POST['sSearch'] != "" )
{
$sWhere = "WHERE (";
for ( $i=0 ; $i<count($aColumns) ; $i++ )
{
if ( isset($_POST['bSearchable_'.$i]) && $_POST['bSearchable_'.$i] == "true" )
{
$sWhere .= $aColumns[$i]." LIKE '%".mysql_real_escape_string( $_POST['sSearch'] )."%' OR ";
}
}
$sWhere = substr_replace( $sWhere, "", -3 );
$sWhere .= ')';
}
/* Individual column filtering */
for ( $i=0 ; $i<count($aColumns) ; $i++ )
{
if ( isset($_POST['bSearchable_'.$i]) && $_POST['bSearchable_'.$i] == "true" && $_POST['sSearch_'.$i] != '' )
{
if ( $sWhere == "" )
{
$sWhere = "WHERE ";
}
else
{
$sWhere .= " AND ";
}
$sWhere .= $aColumns[$i]." LIKE '%".mysql_real_escape_string($_POST['sSearch_'.$i])."%' ";
}
}
/*
* SQL queries
* Get data to display
*/
$sQuery = "
SELECT SQL_CALC_FOUND_ROWS ".str_replace(" , ", " ", implode(", ", $aColumns))."
FROM $sTable
$sWhere
$sOrder
$sLimit
";
$rResult = @mysql_query( $sQuery, $gaSql['link'] ) or fatal_error( 'MySQL Error: ' . mysql_errno() );
/* Data set length after filtering */
$sQuery = "SELECT FOUND_ROWS()";
$rResultFilterTotal = @mysql_query( $sQuery, $gaSql['link'] ) or fatal_error( 'MySQL Error: ' . mysql_errno() );
$aResultFilterTotal = mysql_fetch_array($rResultFilterTotal);
$iFilteredTotal = $aResultFilterTotal[0];
/* Total data set length */
$sQuery = "
SELECT COUNT(".$sIndexColumn.")
FROM $sTable
";
$rResultTotal = @mysql_query( $sQuery, $gaSql['link'] ) or fatal_error( 'MySQL Error: ' . mysql_errno() );
//$rResultTotal = \DB::select(\DB::raw($sQuery));
$aResultTotal = mysql_fetch_array($rResultTotal);
$iTotal = $aResultTotal[0];
/*
* Output
*/
if(isset($_POST['sEcho'])){
$sEcho = intval($_POST['sEcho']);
}else{
$sEcho = 0;
}
$output = array(
"sEcho" => $sEcho,
"iTotalRecords" => $iTotal,
"iTotalDisplayRecords" => $iFilteredTotal,
"aaData" => array()
);
try {
while ($aRow = mysql_fetch_array($rResult)) {
$row = array();
for ($i = 0; $i < count($aColumns); $i++) {
switch($aColumns[$i]){
case 'version':
/* Special output formatting for 'version' column */
$row[] = ($aRow[$aColumns[$i]] == "0") ? '-' : $aRow[$aColumns[$i]];
break;
default:
$row[] = $aRow[$aColumns[$i]];
break;
}
}
$sanitized_row = [];
foreach($row as $cell){
$encoding = mb_detect_encoding($cell, mb_detect_order(), false);
if($encoding == "UTF-8") {
$cell = mb_convert_encoding($cell, 'UTF-8', 'UTF-8');
}
$cell = iconv(mb_detect_encoding($cell, mb_detect_order(), false), "UTF-8//IGNORE", $cell);
$sanitized_row[] = $cell;
}
$output['aaData'][] = $sanitized_row;
}
}catch (Exception $e){
echo 'Error: ';
var_dump($row);
}
$json = json_encode( $output );
if(json_last_error()) {
print "json last error: ".json_last_error().'\n';
print "json last error msg: ".json_last_error_msg().'\n';
}
return $json;
}
我遇到了编码错误，但我添加了一个 UT8 过滤，它不再抛出错误，但不确定它是否能解决问题。有没有人看到这段代码有什么明显的地方，或者有没有人对 Laravel 4.2 有更好的解决方案？谢谢，让我知道！