php - inner join 4 table in datatables server-side -


i had code php showing data in datatables, php (server-side) not working . whats datatables cannot use inner join ? if can, how fix code ?. , 1 more again, how active searching data in datatables inner join. much: 

<?php    require_once '../config/config.php'; // use require. can not use include function  // storing  request (ie, get/post) global array variable    $requestdata = $_request;    $columns = array(  // datatable column index  => database column name      0 => 'id_hanca',      1 => 'id_detail_po',      2 => 'ukuran',      3 => 'jumlah_hanca',      4 => 'status_hanca',      5 => 'id_user',      6 => 'id_vendor'  );      // getting total number records without search      $sql = "select po_detail.id_detail_po, hanca.id_hanca, hanca.ukuran, hanca.jumlah_hanca, user.name_usr, vendor.nama_vendor";  $sql.= "from hanca";  $sql.= "inner join po_detail on po_detail.id_detail_po = hanca.id_detail_po";  $sql.= "inner join user on user.name_usr = hanca.id_user";  $sql.= "inner join vendor on vendor.id_vendor = hanca.id_vendor";  $query = $db->query($sql);  $totaldata = $query->num_rows;  $totalfiltered = $totaldata;  // when there no search parameter total number rows = total number filtered rows.    $sql = "select * ";  $sql.=" hanca 1=1";  if (!empty($requestdata['search']['value'])) {   // if there search parameter, $requestdata['search']['value'] contains search parameter      $sql.=" , ( id_hanca '%" . $requestdata['search']['value'] . "%' ";      $sql.=" or id_detail_po '%" . $requestdata['search']['value'] . "%' ";      $sql.=" or ukuran '%" . $requestdata['search']['value'] . "%' )";  }  $query = $db->query($sql);  $totalfiltered = $query->num_rows; // when there search parameter have modify total number filtered rows per search result.   $sql.=" order " . $columns[$requestdata['order'][0]['column']] . " " . $requestdata['order'][0]['dir'] . "  limit " . $requestdata['start'] . " ," . $requestdata['length'] . " ";  $query = $db->query($sql);    $data = array();  $no = 1;  foreach ($query $row) {                        //nama user  //    $qry = $db->query("select name_usr user id_usr='" . $row['id_user'] . "'");  //    $nm_user = $qry->fetch_assoc();            $nesteddata = array();      $nesteddata[] = $no++;      $nesteddata[] = $row['id_detail_po'];      $nesteddata[] = $row['ukuran'];      $nesteddata[] = $row['jumlah_hanca'];      $nesteddata[] = $row['name_usr'];          $nesteddata[] = $row['nama_vendor'];      // input hiddden include value update cart      // add html button action      $nesteddata[] = "<a href='#' class=\" btn btn-info btn-xs btn-flat\" data-toggle=\"tooltip\" data-placement=\"top\" title=\"detail belanja\"><span class=\"glyphicon glyphicon-search\"></span> detail</a>";      $data[] = $nesteddata;  }    $json_data = array(      "draw" => intval($requestdata['draw']), // every request/draw clientside , send number parameter, when recieve response/data first check draw number, sending same number in draw.       "recordstotal" => intval($totaldata), // total number of records      "recordsfiltered" => intval($totalfiltered), // total number of records after searching, if there no searching totalfiltered = totaldata      "data" => $data   // total data array  );    echo json_encode($json_data);  // send data json format

you aren't selecting id_user , id_vendor colums in select statement... try selecting them below:

$sql = "select po_detail.id_detail_po, hanca.id_hanca, hanca.ukuran, hanca.jumlah_hanca, user.name_usr, vendor.nama_vendor, hanca.id_user, hanca.id_vendor"; $sql.= "from hanca"; //rest of code.....


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