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Examples: Server-side processing - updates to the SSP class to have a

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simple() static method which makes it very easy to make a server-side
processing request.

- In the examples the SQL statements are all basically the same, so
  having this method to wrap them into a single function cal absolutely
  makes sense.

- Also added a `formatter` option to the columns array which will format
  the data as needed using a closure function.
This commit is contained in:
Allan Jardine
2013-12-11 12:04:58 +00:00
parent c6d8545319
commit 9e3a51200a
8 changed files with 190 additions and 403 deletions
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82
examples/server_side/scripts/server_processing.php
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@@ -33,8 +33,20 @@ $columns = array(
array( 'db' => 'last_name', 'dt' => 1 ),
array( 'db' => 'position', 'dt' => 2 ),
array( 'db' => 'office', 'dt' => 3 ),
array( 'db' => 'start_date', 'dt' => 4 ),
array( 'db' => 'salary', 'dt' => 5 )
array(
'db' => 'start_date',
'dt' => 4,
'formatter' => function( $d, $row ) {
return date( 'jS M y', strtotime($d));
}
),
array(
'db' => 'salary',
'dt' => 5,
'formatter' => function( $d, $row ) {
return '$'.number_format($d);
}
)
);
// SQL server connection information
@@ -60,71 +72,9 @@ if ( is_file( $file ) ) {
}
require( 'ssp.class.php' );
$bindings = array();
$db = SSP::sql_connect( $sql_details );
// Build the SQL query string from the request
$limit = SSP::limit( $_GET, $columns );
$order = SSP::order( $_GET, $columns );
$where = SSP::filter( $_GET, $columns, $bindings );
// Main query to actually get the data
$data = SSP::sql_exec( $db, $bindings,
"SELECT SQL_CALC_FOUND_ROWS `".implode("`, `", SSP::pluck($columns, 'db'))."`
FROM `$table`
$where
$order
$limit"
echo json_encode(
SSP::simple( $_GET, $sql_details, $table, $primaryKey, $columns )
);
// Data set length after filtering
$resFilterLength = SSP::sql_exec( $db,
"SELECT FOUND_ROWS()"
);
$recordsFiltered = $resFilterLength[0][0];
// Total data set length
$resTotalLength = SSP::sql_exec( $db,
"SELECT COUNT(`{$primaryKey}`)
FROM `$table`"
);
$recordsTotal = $resTotalLength[0][0];
/*
* Output
*/
$output = array(
"draw" => intval( $_GET['draw'] ),
"recordsTotal" => intval( $recordsTotal ),
"recordsFiltered" => intval( $recordsFiltered ),
"data" => array()
);
for ( $i=0, $ien=count($data) ; $i<$ien ; $i++ ) {
$row = array();
for ( $j=0, $jen=count($columns) ; $j<$jen ; $j++ ) {
$column = $columns[$j];
// Formatting of data for specific columns
switch ( $columns[$j]['db'] ) {
case 'salary':
$row[ $column['dt'] ] = '$'.number_format($data[$i]['salary']);
break;
case 'start_date':
$row[ $column['dt'] ] = date( 'jS M y', strtotime($data[$i]['start_date']));
break;
default:
$row[ $column['dt'] ] = $data[$i][ $columns[$j]['db'] ];
break;
}
}
$output['data'][] = $row;
}
echo json_encode( $output );