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  • Data table Server-side processing using Cakephp

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    In cakePhp if have an extensive database which contain a huge number of record so you can apply the datatables server side processing there. By applying the datatable server side processing you are furnished with pagination highlight in which it depends upon you, that what number of records you need to appear of predefined values that are 10, 25, 50, 100. In datatable server side handling you likewise have the inquiry catch in which you can look the specific field passage of the specific table.

    At the base of the record there is pagination which demonstrates the page number where you are and you can change to numerous pages and you can likewise guide hop from one page to other.

     

    Code for the Controller. Here we are having the UsersController. The code for the UsersController is composed underneath.

    
    
    <?php
    /**
    * Static content controller.
    *
    * This file will render views from views/pages/
    *
    * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
    * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
    *
    * Licensed under The MIT License
    * For full copyright and license information, please see the LICENSE.txt
    * Redistributions of files must retain the above copyright notice.
    *
    * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
    * @link          http://cakephp.org CakePHP(tm) Project
    * @package       app.Controller
    * @since         CakePHP(tm) v 0.2.9
    * @license       http://www.opensource.org/licenses/mit-license.php MIT License
    */
    
    App::uses('AppController', 'Controller');
    
    /**
    * Static content controller
    *
    * Override this controller by placing a copy in controllers directory of an application
    *
    * @package       app.Controller
    * @link http://book.cakephp.org/2.0/en/controllers/pages-controller.html
    */
    class UsersController extends AppController {
    
    /**
    * This controller does not use a model
    *
    * @var array
    */
    public $uses = array();
    
    /**
    * Displays a view
    *
    * @return void
    * @throws NotFoundException When the view file could not be found
    *	or MissingViewException in debug mode.
    */
    public function main_page() { 
    	$this->set('users', $this->User->find('all'));
    
    }
    
    public function ajax() { 
    
    	$this->layout = "ajax";
    	$this->modelClass = "User";
    	$this->autoRender = false;          
    
    //
    
    	$output = $this->User->GetData();    
    
    
    //        pr($_GET);exit;
    	echo json_encode($output);
    	exit;
    }
    
    }
    
    [Click and drag to move]
    

     

    The code for the main_page.ctp is defined below

    <script type="text/javascript" src="http://code.jquery.com/jquery-1.12.0.min.js"></script>
    <script type="text/javascript" src="http://cdn.datatables.net/1.10.11/js/jquery.dataTables.min.js"></script>
    <link rel="stylesheet" type="text/css" href="http://cdn.datatables.net/1.10.11/css/jquery.dataTables.min.css">
    
    
    
    
    <script type="text/javascript">
        $(document).ready(function() {
            $('#ajaxtable').dataTable({
                "bProcessing": true,
                "bServerSide": true,
                "sAjaxSource": "<?php echo $this->Html->Url(array('controller' => 'Users', 'action' => 'ajax')); ?>"
            });
        });
    </script>
    
    <h1>Browser List</h1>
    
    <table id="ajaxtable">
        <thead>
            <tr>
                <th>Id</th>
                <th>Name</th>
                <th>First Name</th>
                <th>Last Name</th>
                <th>Gender</th>
                <th>Password</th>
                <th>Status</th>        
            </tr>
        </thead>
        <tbody>
            <tr>
                <td colspan="4" class="dataTables_empty">Loading data from server...</td>
            </tr>
        </tbody>
    </table>

     

    The code for the model that is User.php is defined below

    <?php
    class User extends AppModel {
        public function GetData() {
    /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
    * Easy set variables
    */
    
    /* Array of database columns which should be read and sent back to DataTables. Use a space where
    * you want to insert a non-database field (for example a counter or static image)
    */
    $aColumns = array( 'user_id','username','first_name','last_name','gender','password','status' );
    
    /* Indexed column (used for fast and accurate table cardinality) */
    $sIndexColumn = "user_id";
    
    /* DB table to use */
    $sTable = "users";
    
    App::uses('ConnectionManager', 'Model');
    $dataSource = ConnectionManager::getDataSource('default');
    
    /* Database connection information */
    $gaSql['root']       = $dataSource->config['login'];
    $gaSql['']   = $dataSource->config['password'];
    $gaSql['user']         = $dataSource->config['database'];
    $gaSql['localhost']     = $dataSource->config['host'];
    
    
    //yprint_r( $sIndexColumn);
    
    /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
    * 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['localhost'], $gaSql['root'], $gaSql['']  ) )
    {
        fatal_error( 'Could not open connection to server' );
    }
    
    if ( ! mysql_select_db( $gaSql['user'], $gaSql['link'] ) )
    {
        fatal_error( 'Could not select database ' );
    }
    
    
    /*
    * Paging
    */
    $sLimit = "";
    if ( isset( $_GET['iDisplayStart'] ) && $_GET['iDisplayLength'] != '-1' )
    {
        $sLimit = "LIMIT ".intval( $_GET['iDisplayStart'] ).", ".
        intval( $_GET['iDisplayLength'] );
    }
    
    
    /*
    * Ordering
    */
    $sOrder = "";
    if ( isset( $_GET['iSortCol_0'] ) )
    {
        $sOrder = "ORDER BY  ";
        for ( $i=0 ; $i<intval( $_GET['iSortingCols'] ) ; $i++ )
        {
            if ( $_GET[ 'bSortable_'.intval($_GET['iSortCol_'.$i]) ] == "true" )
            {
                $sOrder .= "`".$aColumns[ intval( $_GET['iSortCol_'.$i] ) ]."` ".
                ($_GET['sSortDir_'.$i]==='asc' ? 'asc' : 'desc') .", ";
            }
        }
    
        $sOrder = substr_replace( $sOrder, "", -2 );
        if ( $sOrder == "ORDER BY" )
        {
            $sOrder = "";
        }
    }
    
    
    /*
    * Filtering
    * NOTE this does not match the built-in DataTables filtering which does it
    * word by word on any field. It's possible to do here, but concerned about efficiency
    * on very large tables, and MySQL's regex functionality is very limited
    */
    $sWhere = "";
    if ( isset($_GET['sSearch']) && $_GET['sSearch'] != "" )
    {
        $sWhere = "WHERE (";
            for ( $i=0 ; $i<count($aColumns) ; $i++ )
            {
                $sWhere .= "`".$aColumns[$i]."` LIKE '%".mysql_real_escape_string( $_GET['sSearch'] )."%' OR ";
            }
            $sWhere = substr_replace( $sWhere, "", -3 );
            $sWhere .= ')';
    }
    
    /* Individual column filtering */
    for ( $i=0 ; $i<count($aColumns) ; $i++ )
    {
        if ( isset($_GET['bSearchable_'.$i]) && $_GET['bSearchable_'.$i] == "true" && $_GET['sSearch_'.$i] != '' )
        {
            if ( $sWhere == "" )
            {
                $sWhere = "WHERE ";
            }
            else
            {
                $sWhere .= " AND ";
            }
            $sWhere .= "`".$aColumns[$i]."` LIKE '%".mysql_real_escape_string($_GET['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() );
    $aResultTotal = mysql_fetch_array($rResultTotal);
    $iTotal = $aResultTotal[0];
    
    
    /*
    * Output
    */
    $output = array(
    /*"sEcho" => intval($_GET['sEcho']),
    "iTotalRecords" => $iTotal,
    "iTotalDisplayRecords" => $iFilteredTotal,
    "aaData" => array()
    */
    "draw" => intval($_GET['sEcho']),
    "recordsTotal" => $iTotal,
    "recordsFiltered" => $iFilteredTotal,
    "data" => array()
    );
    
    while ( $aRow = mysql_fetch_array( $rResult ) )
    {
        $row = array();
        for ( $i=0 ; $i<count($aColumns) ; $i++ )
        {
            if ( $aColumns[$i] == "version" )
            {
                /* Special output formatting for 'version' column */
                $row[] = ($aRow[ $aColumns[$i] ]=="0") ? '-' : $aRow[ $aColumns[$i] ];
            }
            else if ( $aColumns[$i] != ' ' )
            {
                /* General output */
                $row[] = $aRow[ $aColumns[$i] ];
            }
        }
        $output['data'][] = $row;
    }
    
    return $output;
    }
    }
    ?>
    
    
    
    

     

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