How to use 'WHERE' clause using ssp.class.php DataTables

Question

Okay so i\'m trying to display information from my database using jQuery DataTable (DataTables.net). I can get it to work fine displaying the entire table \'notes\' but I would

Answer 1

Well.. you can't without editing or extending SSP. This is pretty bad style with alot of copied code, but SSP does not allow better customization...

class SSPCustom extends SSP
{
    /**
     *  @param  array $request Data sent to server by DataTables
     *  @param  array $sql_details SQL connection details - see sql_connect()
     *  @param  string $table SQL table to query
     *  @param  string $primaryKey Primary key of the table
     *  @param  array $columns Column information array
     *  @param  string $whereCustom Custom (additional) WHERE clause
     *  @return array          Server-side processing response array
     */
    static function simpleCustom ( $request, $sql_details, $table, $primaryKey, $columns, $whereCustom = '' )
    {
        $bindings = array();
        $db = self::sql_connect( $sql_details );

        // Build the SQL query string from the request
        $limit = self::limit( $request, $columns );
        $order = self::order( $request, $columns );
        $where = self::filter( $request, $columns, $bindings );

        if ($whereCustom) {
            if ($where) {
                $where .= ' AND ' . $whereCustom;
            } else {
                $where .= 'WHERE ' . $whereCustom;
            }
        }

        // Main query to actually get the data
        $data = self::sql_exec( $db, $bindings,
            "SELECT SQL_CALC_FOUND_ROWS `".implode("`, `", self::pluck($columns, 'db'))."`
             FROM `$table`
             $where
             $order
             $limit"
        );

        // Data set length after filtering
        $resFilterLength = self::sql_exec( $db,
            "SELECT FOUND_ROWS()"
        );
        $recordsFiltered = $resFilterLength[0][0];

        // Total data set length
        $resTotalLength = self::sql_exec( $db,
            "SELECT COUNT(`{$primaryKey}`)
             FROM   `$table`
             WHERE  " . $whereCustom
        );
        $recordsTotal = $resTotalLength[0][0];


        /*
         * Output
         */
        return array(
            "draw"            => intval( $request['draw'] ),
            "recordsTotal"    => intval( $recordsTotal ),
            "recordsFiltered" => intval( $recordsFiltered ),
            "data"            => self::data_output( $columns, $data )
        );
    }
}

Call it with:

echo json_encode(
    SSPCustom::simpleCustom( $_GET, $sql_details, $table, $primaryKey, $columns, "Status ='Unread'" )
);

Untested

Answer 2

You can use where clause like that;

$data = SSP::sql_exec( $db, $bindings,
   "SELECT SQL_CALC_FOUND_ROWS ".implode(", ", SSP::pluck($columns, 'db'))."
    FROM $table where Status = 'Unread' // <--where clause here
    $where
    $order
    $limit"
);

Answer 3

I was also able to solve this problem but inserting some code into the ssp.class.php filter function. Below is the listing for the function with an example custom where clause inserted. The "simple" function from that class will work without any further jury-rigging. The advantage is that it will play nice with the text-search feature of the datatable.

static function filter ( $request, $columns, &$bindings )
{
    $globalSearch = array();
    $columnSearch = array();
    $dtColumns = self::pluck( $columns, 'dt' );

    if ( isset($request['search']) && $request['search']['value'] != '' ) {
        $str = $request['search']['value'];

        for ( $i=0, $ien=count($request['columns']) ; $i<$ien ; $i++ ) {
            $requestColumn = $request['columns'][$i];
            $columnIdx = array_search( $requestColumn['data'], $dtColumns );
            $column = $columns[ $columnIdx ];

            if ( $requestColumn['searchable'] == 'true' ) {
                $binding = self::bind( $bindings, '%'.$str.'%', PDO::PARAM_STR );
                $globalSearch[] = "`".$column['db']."` LIKE ".$binding;
            }
        }
    }

    // Individual column filtering
    for ( $i=0, $ien=count($request['columns']) ; $i<$ien ; $i++ ) {
        $requestColumn = $request['columns'][$i];
        $columnIdx = array_search( $requestColumn['data'], $dtColumns );
        $column = $columns[ $columnIdx ];

        $str = $requestColumn['search']['value'];

        if ( $requestColumn['searchable'] == 'true' &&
         $str != '' ) {
            $binding = self::bind( $bindings, '%'.$str.'%', PDO::PARAM_STR );
            $columnSearch[] = "`".$column['db']."` LIKE ".$binding;
        }
    }

    // Combine the filters into a single string
    $where = '';

    if ( count( $globalSearch ) ) {
        $where = '('.implode(' OR ', $globalSearch).')';
    }

    if ( count( $columnSearch ) ) {
        $where = $where === '' ?
            implode(' AND ', $columnSearch) :
            $where .' AND '. implode(' AND ', $columnSearch);
    }

        //------------------------------------------------------------
        //############################################################
        //EXAMPLE ADDITIONAL WHERE CONDITIONS HERE. THIS IS EQUIVALENT
        //TO "WHERE id = 1"
        $where = ($where === '') ? 
            "id = ".self::bind( $bindings, 1, PDO::PARAM_INT) :
            $where ." AND "."id = ".self::bind( $bindings, 1, PDO::PARAM_INT);
        //############################################################
        //############################################################
        //------------------------------------------------------------


    if ( $where !== '' ) {
        $where = 'WHERE '.$where;
    }

    return $where;
}

Answer 4

You should change DataTables default functions to do this!

use this ssp.class.php customized class

Link

Use it like following example:

require( 'ssp.class.php' );
$where = "Status ='Unread'";
echo json_encode(
    SSP::simple( $_GET, $sql_details, $table, $primaryKey, $columns,$where )
);

If you set $where parameter, Custom class will add where clause to select statement!

Update :

DataTables in 2015 add complex method

The new built-in method can set where clause in query!