เราสามารถเพิ่มเงื่อนไขให้ DataTables ใช้ในการค้นหาได้ โดยส่วนที่เปลี่ยนไปจากเดิมคือใช้ “beforeSend” ในการรวมข้อมูลจาก form (formA) และเขียน validation ง่าย ๆ โดยบังคับว่าถ้า advanceSearch ถูกติ๊กอยู่จะต้องเลือก geo_id ด้วย
jQuery.DataTables/data.json.external.search.html
<!doctype html>
<html> <head> <meta charset="utf-8"> <meta name="author" content="Pitt Phunsanit"> <title>DataTables: external.search</title> <link href="../vendor/twbs/bootstrap/dist/css/bootstrap.min.css" rel="stylesheet" type="text/css"> <link href="../vendor/twbs/bootstrap/dist/css/bootstrap-theme.min.css" rel="stylesheet" type="text/css"> <link href="../vendor/datatables/datatables/media/css/dataTables.bootstrap.min.css" rel="stylesheet" type="text/css">
</head> <body> <form action="DataTables.json.php" class="form-inline" id="formA" method="post"> <div class="form-group"> <input name="advanceSearch" type="checkbox"> <label for="advanceSearch">advance Search</label> </div> <div class="form-group"> <label for="geo_id">ภูมิภาค:</label> <select class="form-control" name="geo_id"> <option selected="selected" value="">--- Select ---</option> <option value="1">ภาคเหนือ</option> <option value="2">ภาคกลาง</option> <option value="3">ภาคตะวันออกเฉียงเหนือ</option> <option value="4">ภาคตะวันตก</option> <option value="5">ภาคตะวันออก</option> <option value="6">ภาคใต้</option> </select> </div> <button type="submit" class="btn btn-default">Search</button> </form> <table class="table table-bordered table-hover table-striped" id="tableA" width="100%"></table> <script src="../vendor/components/jquery/jquery.min.js"></script> <script src="../vendor/datatables/datatables/media/js/jquery.dataTables.min.js"></script> <script src="../vendor/datatables/datatables/media/js/dataTables.bootstrap.min.js"></script> <script src="data.json.external.search.js"></script>
</body> </html>
jQuery.DataTables/data.json.external.search.js
$ (function () { formA = $ ('#formA') ; tableA = $ ('#tableA') ; datatable = tableA.DataTable ({ "ajax": { "beforeSend": function (jqXHR, settings) { /* add value form from to DataTable params */ settings.data = formA.serialize () + '&' + settings.data; /* validation */ var params = new URLSearchParams (settings.data) ; /* user must selected region if enable advance search */ if (params.get ('advanceSearch') == 'on' && params.get ('geo_id') == '') { jqXHR.abort () ; alert ('กรุณาเลือกภูมิภาค') ; return false; } return true; }, "dataSrc": function (json) { alert ('data back ' + json.data.length + ' items') ; return json.data; }, "method": "POST", "url": "data.json.php", }, "columns": [{ "orderable": false, "render": function (data, type, row, meta) { return parseInt (meta.row) + parseInt (meta.settings._iDisplayStart) + 1; }, "title": 'No.', "width": "10px", }, { "orderable": false, "render": function (data, type, row, meta) { return '<input type="checkbox" value="' + row.DISTRICT_CODE + '">'; }, "title": '<input class="checkAll" type="checkbox">', "width": "10px", }, { "orderable": false, "render": function (data, type, row, meta) { if (row.enable == '1') { return '<span class="glyphicon glyphicon-ok"></span>'; } else { return '<span class="glyphicon glyphicon-remove"></span>'; } }, "title": "Enable", "width": "10px", }, { "data": "DISTRICT_CODE", "title": "District Code", "width": "90px", }, { "data": "DISTRICT_NAME", "title": "District Name", }, { "data": "PROVINCE_NAME", "title": "Province Name", } ], /* default sort */ "order": [ [3, "asc"], [4, "asc"], ], "processing": true, "serverSide": true, "stateSave": true, }) ; $ ('.checkAll', tableA) .click (function () { $ ('input:checkbox', tableA) .not (this) .prop ('checked', this.checked) ; }) ; formA.submit (function (event) { event.preventDefault () ; datatable.ajax.reload () ; }) ; }) ;
- ข้อมูลจากฟอร์ม
จะถูกรวมกับ data ที่ DataTables สร้างขึ้นมาเองโดยid="formA"
beforeSend
"beforeSend": function (jqXHR, settings) { settings.data = formA.serialize () + '&' + settings.data; }, - สามารถทำ validation data ก่อนส่งข้อมูลออกไป ถ้าต้องการหยุดการทำงาน ก็ให้ใช้
"beforeSend": function (jqXHR, settings) { jqXHR.abort () ; },
ไม่ให้ส่งข้อมูลกลับไป server อาจจะดัดแปลงให้ datatable ไม่ขอข้อมูลจาก server กรณีที่ไม่มีการเลือกตัว filter ก็ได้เช่นกัน - หลังได้ข้อมูลกลับมายังสามารถใช้
dataSrc / success
"dataSrc": function (json) { alert ('data back ' + json.data.length + ' items') ; return json.data; },
แก้ไขข้อมูลก่อนแสดงผลได้ แต่ไม่ใช่ “success” เหมือนใน jQuery ajax ตามปกตินะครับ เพราะจะทำให้ DataTables มันทำงานผิดปกติได้เลย - ถ้าต้องการให้ DataTables ดึงข้อมูลใหม่ให้ใช้รูปแบบ
datatable.ajax.reload () ;
- ถ้าต้องการให้ DataTable ดึงข้อมูลใหม่ให้ใช้รูปแบบ
refresh datatable
jQuery.DataTables/data.json.phpdatatable.ajax.reload () ;
<?php /* https://datatables.net/manual/server-side */ $output = [ 'data' => [], 'debug' => [ 'length' => $_REQUEST['length'], 'post' => $_REQUEST, 'sqlCount' => '', 'sqlResult' => '', 'start' => $_REQUEST['start'], ], 'draw' => $_REQUEST['draw'], 'recordsFiltered' => $_REQUEST['length'], 'recordsTotal' => 0, ]; $dns = new PDO ('mysql:host=localhost;dbname=snippets', 'root', '', [ //PDO::ATTR_EMULATE_PREPARES => false, PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8', ]) ; $condition = []; $from = ' FROM district AS d LEFT JOIN province AS p ON d.PROVINCE_ID = p.PROVINCE_ID'; $parameters = []; $where = ''; if (isset ($_REQUEST['filters']) || isset ($_REQUEST['search']['value'])) { if (isset ($_REQUEST['search']['value'])) { if ($_REQUEST['search']['value'] != '') { $parameter = ':d_DISTRICT_NAME'; $parameters[$parameter] = '%' . $_REQUEST['search']['value'] . '%'; array_push ($condition, 'd.DISTRICT_NAME LIKE ' . $parameter) ; } } if (isset ($_REQUEST['filters'])) { foreach ($_REQUEST['filters'] as $tableAlias => $filter) { foreach ($filter as $field => $value) { if ($value != '') { $parameter = ':' . $tableAlias . '_' . $field; $parameters[$parameter] = '%' . $value . '%'; array_push ($condition, $tableAlias . '.' . $field . ' LIKE ' . $parameter) ; } } } } } if (isset ($_REQUEST['geo_id']) && $_REQUEST['geo_id'] != '') { $parameter = ':d_geo_id'; $parameters[$parameter] = $_REQUEST['geo_id']; array_push ($condition, 'd.GEO_ID = ' . $parameter) ; } if (count ($parameters)) { $where = ' WHERE ' . implode ("\n\t AND ", $condition) ; } if (isset ($_REQUEST['order']) && isset ($_REQUEST['order'][0])) { $columns = [ 0 => 'DISTRICT_NAME', 3 => 'DISTRICT_CODE', 4 => 'DISTRICT_NAME', 5 => 'PROVINCE_NAME', ]; $order = ' ORDER BY ' . $columns[$_REQUEST['order'][0]['column']] . ' ' . strtoupper ($_REQUEST['order'][0]['dir']) ; } else { $order = ' ORDER BY DISTRICT_NAME ASC'; } $output['debug']['parameters'] = $parameters; /* Total records, before filtering */ $sql = 'SELECT COUNT (d.DISTRICT_ID) ' . $from; try { $output['debug']['sqlCount'] = $sql; $stmt = $dns->prepare ($sql) ; $stmt->execute ($parameters) ; $output['recordsTotal'] = (int) $stmt->fetchColumn (0) ; } catch (PDOException $e) { exit ($e->getMessage ()) ; } /* Total records, after filtering */ $sql = 'SELECT COUNT (d.DISTRICT_ID) ' . $from . $where; try { $output['debug']['sqlCount'] = $sql; $stmt = $dns->prepare ($sql) ; $stmt->execute ($parameters) ; $output['recordsFiltered'] = (int) $stmt->fetchColumn (0) ; } catch (PDOException $e) { exit ($e->getMessage ()) ; } /* data */ if ($output['recordsTotal'] > 0) { $sql = 'SELECT d.enable, d.DISTRICT_ID, d.DISTRICT_CODE, d.DISTRICT_NAME, p.PROVINCE_NAME' . $from . $where . $order . " LIMIT " . $_REQUEST['start'] . ", " . $_REQUEST['length'] . ";"; try { $output['debug']['sqlResult'] = $sql; $stmt = $dns->prepare ($sql) ; $stmt->execute ($parameters) ; $output['data'] = $stmt->fetchAll (PDO::FETCH_ASSOC) ; } catch (PDOException $e) { exit ($e->getMessage ()) ; } } /* unset debug for security */ unset ($output['debug']) ; header ('Content-type: application/json; charset=utf-8') ; echo json_encode ($output) ;
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