USE INDEX the CakePHP way

Well ok not 100% the cakephp way but better than just using $this->query(...).

I wanted it to look like this:

$this->find('all', array(
'fields' => array('id', 'name'),
'use' => 'index_name'
));

To get this working you need to modify dbo_source. Copy it from cake/libs/model/datasources/dbo_source.php to app/models/datasources/dbo_source.php.

You can download my modified dbo_source.php . I have commented the modified lines with "added". I have only tested this on MySQL. I do not know if it will work on other databases. Also I am not sure if my solution is the best. Please feel free to comment if you have any improvements.

 

To manually modify the dbo_source to support the USE INDEX syntax:

in function read:

 /* added */
 if (!isset($queryData['use']))
     $queryData['use'] = null;
 
 /* /added */
in function generateAssociationQuery: 

     return $this->buildStatement(
     array(
 'fields' => array_unique($queryData['fields']),
 'table' => $this->fullTableName($model),
 'alias' => $model->alias,
 'limit' => $queryData['limit'],
 'offset' => $queryData['offset'],
 'joins' => $queryData['joins'],
 'conditions' => $queryData['conditions'],
 'order' => $queryData['order'],
 'group' => $queryData['group'],
 'use' => $queryData['use'] // added
     ), $model
     );

in function buildStatement:

 return $this->renderStatement('select', array(
     'conditions' => $this->conditions($query['conditions'], true, true, $model),
     'fields' => implode(', ', $query['fields']),
     'table' => $query['table'],
     'alias' => $this->alias . $this->name($query['alias']),
     'order' => $this->order($query['order'], 'ASC', $model),
     'limit' => $this->limit($query['limit'], $query['offset']),
     'joins' => implode(' ', $query['joins']),
     'group' => $this->group($query['group'], $model),
     'use' => $query['use'] // added
 ));

in function renderStatement:

     case 'select':
 
 /* added */
 if (empty($use)) // added
     return "SELECT {$fields} FROM {$table} {$alias} {$joins} {$conditions} {$group} {$order} {$limit}";
 else
     return "SELECT {$fields} FROM {$table} {$alias} {$joins} USE INDEX ({$use}) {$conditions} {$group} {$order} {$limit}";
 /* /added */
 break;
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Lock tables in CakePHP

I needed to do some table locking. Just call the method from the controller to lock and unlock your tables. The code below is only tested with MySQL and InnoDb tables. Put it in app_model.php

<?php
class AppModel extends Model {
    function lockTableRW() {
 $this->lockTable('READ');
 $this->lockTable('WRITE');
    }
    function lockTable($type='READ') {
 $dbo = $this->getDataSource();
 $dbo->execute('LOCK TABLES '.$this->table.' '.$type);
    }
    function unlockTables() {
 $dbo = $this->getDataSource();
 $dbo->execute('UNLOCK TABLES');
    }
}
 
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Template for CakePHP

I have decided to share a template I made. It is a modification of the default template in CakePHP.

  • Simple menu system
  • Works on most screens. The menu is flexible.
  • Uses CSS gradient for Firefox and Webkit browsers
  • Some text effects
  • Works best in modern browsers

Images:

cakephp template1 cakephp template2

 Download the template 

Tags:
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