* Copyright (c) 2006, Cake Software Foundation, Inc.
* 1785 E. Sahara Avenue, Suite 490-204
* Las Vegas, Nevada 89104
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @filesource
* @copyright Copyright (c) 2006, Cake Software Foundation, Inc.
* @link http://www.cakefoundation.org/projects/info/cakephp CakePHP Project
* @package cake
* @subpackage cake.cake.libs.model.datasources
* @since CakePHP v 0.10.0.1076
* @version $Revision$
* @modifiedby $LastChangedBy$
* @lastmodified $Date$
* @license http://www.opensource.org/licenses/mit-license.php The MIT License
*/
/**
* Include DataSource base class
*
*/
uses('model'.DS.'datasources'.DS.'datasource');
/**
* DboSource
*
* Creates DBO-descendant objects from a given db connection configuration
*
* @package cake
* @subpackage cake.cake.libs.model.datasources
* @since CakePHP v 0.10.0.1076
*
*/
class DboSource extends DataSource
{
/**
* Description string for this Database Data Source.
*
* @var unknown_type
*/
var $description = "Database Data Source";
/**
* Enter description here...
*
* @var unknown_type
*/
var $__bypass = false;
/**
* Enter description here...
*
* @var array
*/
var $__assocJoins = null;
/**
* Constructor
*
*/
function __construct($config = null)
{
$this->debug = DEBUG > 0;
$this->fullDebug = DEBUG > 1;
parent::__construct($config);
return $this->connect();
}
/**
* Prepares a value, or an array of values for database queries by quoting and escaping them.
*
* @param mixed $data A value or an array of values to prepare.
* @return mixed Prepared value or array of values.
*/
function value ($data, $column = null)
{
if (is_array($data))
{
$out = array();
foreach ($data as $key => $item)
{
$out[$key] = $this->value($item);
}
return $out;
}
else
{
return null;
}
}
/**
* Convenience method for DboSource::listSources().
*
* @return array
*/
function sources ()
{
return array_map('strtolower', $this->listSources());
}
/**
* Executes given SQL statement.
*
* @param string $sql SQL statement
* @return unknown
*/
function rawQuery ($sql)
{
$this->took = $this->error = $this->numRows = false;
return $this->execute($sql);
}
/**
* Queries the database with given SQL statement, and obtains some metadata about the result
* (rows affected, timing, any errors, number of rows in resultset). The query is also logged.
* If DEBUG is set, the log is shown all the time, else it is only shown on errors.
*
* @param string $sql
* @return unknown
*/
function execute($sql)
{
$t = getMicrotime();
$this->_result = $this->_execute($sql);
$this->affected = $this->lastAffected();
$this->took = round((getMicrotime() - $t) * 1000, 0);
$this->error = $this->lastError();
$this->numRows = $this->lastNumRows($this->_result);
$this->logQuery($sql);
if ($this->error)
{
return false;
}
else
{
return $this->_result;
}
}
/**
* Returns a single row of results from the _last_ SQL query.
*
* @param resource $res
* @return array A single row of results
*/
function fetchArray ($assoc=false)
{
if ($assoc === false)
{
return $this->fetchRow();
}
else
{
return $this->fetchRow($assoc);
}
}
/**
* Returns a single row of results for a _given_ SQL query.
*
* @param string $sql SQL statement
* @return array A single row of results
*/
function one ($sql)
{
if ($this->execute($sql))
{
return $this->fetchArray();
}
return false;
}
/**
* Returns an array of all result rows for a given SQL query.
* Returns false if no rows matched.
*
* @param string $sql SQL statement
* @return array Array of resultset rows, or false if no rows matched
*/
function fetchAll ($sql)
{
if($this->execute($sql))
{
$out = array();
while ($item = $this->fetchArray(null, true))
{
$out[] = $item;
}
return $out;
}
else
{
return false;
}
}
/**
* Returns a single field of the first of query results for a given SQL query, or false if empty.
*
* @param string $name Name of the field
* @param string $sql SQL query
* @return unknown
*/
function field ($name, $sql)
{
$data = $this->one($sql);
if (empty($data[$name]))
{
return false;
}
else
{
return $data[$name];
}
}
/**
* Checks if it's connected to the database
*
* @return boolean True if the database is connected, else false
*/
function isConnected()
{
return $this->connected;
}
/**
* Outputs the contents of the queries log.
*
* @param boolean $sorted
*/
function showLog($sorted=false)
{
$log = $sorted?
sortByKey($this->_queriesLog, 'took', 'desc', SORT_NUMERIC):
$this->_queriesLog;
if($this->_queriesCnt > 1)
{
$text = 'queries';
}
else
{
$text = 'query';
}
print("\n| {$this->_queriesCnt} {$text} took {$this->_queriesTime} ms |
|---|
\n");
print("| Nr | Query | Error | Affected | Num. rows | Took (ms) |
\n");
foreach($log as $k => $i)
{
print("| ".($k + 1)." | {$i['query']} | {$i['error']} | {$i['affected']} | {$i['numRows']} | {$i['took']} |
\n");
}
print("
\n");
}
/**
* Log given SQL query.
*
* @param string $sql SQL statement
*/
function logQuery($sql)
{
$this->_queriesCnt++;
$this->_queriesTime += $this->took;
$this->_queriesLog[] = array(
'query' => $sql,
'error' => $this->error,
'affected' => $this->affected,
'numRows' => $this->numRows,
'took' => $this->took
);
if (count($this->_queriesLog) > $this->_queriesLogMax)
{
array_pop($this->_queriesLog);
}
if ($this->error)
{
return false; // shouldn't we be logging errors somehow?
// TODO: Add hook to error log
}
}
/**
* Output information about an SQL query. The SQL statement, number of rows in resultset,
* and execution time in microseconds. If the query fails, an error is output instead.
*
* @param string $sql Query to show information on.
*/
function showQuery($sql)
{
$error = $this->error;
if (strlen($sql) > 200 && !$this->fullDebug)
{
$sql = substr($sql, 0, 200) .'[...]';
}
if ($this->debug || $error)
{
print("Query: {$sql} [Aff:{$this->affected} Num:{$this->numRows} Took:{$this->took}ms]");
if($error)
{
print("
ERROR: {$this->error}");
}
print('
');
}
}
/**
* Enter description here...
*
* @param Model $model
* @param unknown_type $fields
* @param unknown_type $values
* @return boolean Success
*/
function create(&$model, $fields = null, $values = null)
{
if ($fields == null)
{
unset($fields, $values);
$fields = array_keys($model->data);
$values = array_values($model->data);
}
foreach ($fields as $field)
{
$fieldInsert[] = $this->name($field);
}
foreach ($values as $value)
{
$valueInsert[] = $this->value($value);
}
if($this->execute('INSERT INTO '.$model->table.' ('.join(',', $fieldInsert).') VALUES ('.join(',', $valueInsert).')'))
{
return true;
}
return false;
}
/**
* Enter description here...
*
* @param Model $model
* @param array $queryData
* @param integer $recursive Number of levels of association
* @return unknown
*/
function read (&$model, $queryData = array(), $recursive = null)
{
$this->__scrubQueryData($queryData);
$null = null;
$array = array();
$linkedModels = array();
$this->__bypass = false;
$this->__assocJoins = null;
if(!is_null($recursive))
{
$_recursive = $model->recursive;
$model->recursive = $recursive;
}
if(!empty($queryData['fields']))
{
$this->__bypass = true;
}
if ($model->recursive > 0)
{
foreach($model->__associations as $type)
{
foreach($model->{$type} as $assoc => $assocData)
{
$linkModel =& $model->{$assocData['className']};
if($model->name == $linkModel->name && $type != 'hasAndBelongsToMany' && $type != 'hasMany')
{
if (true === $this->generateSelfAssociationQuery($model, $linkModel, $type, $assoc, $assocData, $queryData, false, $null))
{
$linkedModels[] = $type.$assoc;
}
}
else
{
if (true === $this->generateAssociationQuery($model, $linkModel, $type, $assoc, $assocData, $queryData, false, $null))
{
$linkedModels[] = $type.$assoc;
}
}
}
}
}
// Build final query SQL
$query = $this->generateAssociationQuery($model, $null, null, null, null, $queryData, false, $null);
$resultSet = $this->fetchAll($query);
if ($model->recursive > 0)
{
foreach($model->__associations as $type)
{
foreach($model->{$type} as $assoc => $assocData)
{
if (!in_array($type.$assoc, $linkedModels))
{
$linkModel =& $model->{$assocData['className']};
$this->queryAssociation($model, $linkModel, $type, $assoc, $assocData, $array, true, $resultSet);
if ($model->recursive > 1 && $linkModel->recursive > 0)
{
foreach($linkModel->__associations as $type1)
{
foreach($linkModel->{$type1} as $assoc1 => $assocData1)
{
$deepModel =& $linkModel->{$assocData1['className']};
if ($assoc1 != $model->name)
{
foreach ($resultSet as $i => $data)
{
if (isset($data[$linkModel->name]))
{
foreach ($resultSet[$i][$linkModel->name] as $value)
{
$datas[][$linkModel->name] = $value[$linkModel->primaryKey];
$fetch = $this->queryDeepAssociation($linkModel, $deepModel, $type1, $assoc1, $assocData1, $array, true, $datas);
unset($datas);
if (!empty($fetch[0]))
{
foreach ($fetch as $j => $row1)
{
if(!empty($row1))
{
foreach ($resultSet as $valueResult => $endResult)
{
$count = 0;
foreach ($endResult[$linkModel->name] as $keyCheck)
{
foreach ($row1 as $mas)
{
if($keyCheck[$linkModel->primaryKey] == $mas[$deepModel->name][$assocData1['foreignKey']])
{
$resultSet[$i][$linkModel->name][$count][$deepModel->name][] = $mas[$deepModel->name];
}
}
$count++;
}
}
}
}
}
unset($fetch);
}
}
}
}
}
}
}
}
}
}
}
if(!is_null($recursive))
{
$model->recursive = $_recursive;
}
return $resultSet;
}
function queryDeepAssociation(&$model, &$linkModel, $type, $association, $assocData, &$queryData, $external = false, &$resultSet)
{
$query = $this->generateAssociationQuery($model, $linkModel, $type, $association, $assocData, $queryData, $external, $resultSet);
if ($query)
{
foreach ($resultSet as $i => $row)
{
$q = $this->insertQueryData($query, $resultSet, $association, $assocData, $model, $linkModel, $i);
$fetch[] = $this->fetchAll($q);
}
return $fetch;
}
}
/**
* Enter description here...
*
* @param Model $model
* @param unknown_type $linkModel
* @param string $type Association type
* @param unknown_type $association
* @param unknown_type $assocData
* @param unknown_type $queryData
* @param unknown_type $external
* @param unknown_type $resultSet
* @param integer $recursive Number of levels of association
*/
function queryAssociation(&$model, &$linkModel, $type, $association, $assocData, &$queryData, $external = false, &$resultSet)
{
$query = $this->generateAssociationQuery($model, $linkModel, $type, $association, $assocData, $queryData, $external, $resultSet);
if ($query)
{
foreach ($resultSet as $i => $row)
{
$q = $this->insertQueryData($query, $resultSet, $association, $assocData, $model, $linkModel, $i);
$fetch = $this->fetchAll($q);
if (!empty($fetch) && is_array($fetch))
{
if (isset($fetch[0][$association]))
{
foreach ($fetch as $j => $row)
{
$resultSet[$i][$association][$j] = $row[$association];
}
}
else
{
$plural = Inflector::pluralize($association);
foreach ($fetch as $j => $row)
{
$resultSet[$i][$plural][$j] = $row[$plural];
}
}
}
}
}
}
/**
* Enter description here...
*
* @param unknown_type $model
* @param unknown_type $linkModel
* @param unknown_type $type
* @param unknown_type $association
* @param unknown_type $assocData
* @param unknown_type $queryData
* @param unknown_type $external
* @param unknown_type $resultSet
* @return unknown
*/
function generateSelfAssociationQuery(&$model, &$linkModel, $type, $association = null, $assocData = array(), &$queryData, $external = false, &$resultSet)
{
$alias = $association;
if(!isset($queryData['selfJoin']))
{
$queryData['selfJoin'] = array();
$sql = 'SELECT ' . join(', ', $this->fields($model, $model->name, $queryData['fields'])). ', ';
$sql .= join(', ', $this->fields($linkModel, $alias, ''));
$sql .= ' FROM '.$model->table.' AS ' . $model->name;
$sql .= ' LEFT JOIN '.$linkModel->table.' AS ' . $alias;
$sql .= ' ON ';
$sql .= $this->name($model->name).'.'.$this->name($assocData['foreignKey']);
$sql .= ' = '.$this->name($alias).'.'.$this->name($linkModel->primaryKey);
if (!in_array($sql, $queryData['selfJoin']))
{
$queryData['selfJoin'][] = $sql;
return true;
}
}
else
{
if(isset($this->__assocJoins))
{
$replace = ', ';
$replace .= join(', ', $this->__assocJoins['fields']);
$replace .= ' FROM';
}
else
{
$replace = 'FROM';
}
$sql = $queryData['selfJoin'][0];
$sql .= ' ' . join(' ', $queryData['joins']);
$sql .= $this->conditions($queryData['conditions']).' '.$this->order($queryData['order']);
$sql .= ' '.$this->limit($queryData['limit']);
$result = preg_replace('/FROM/', $replace, $sql);
return $result;
}
}
/**
* Enter description here...
*
* @param Model $model
* @param unknown_type $linkModel
* @param unknown_type $type
* @param unknown_type $association
* @param unknown_type $assocData
* @param unknown_type $queryData
* @param unknown_type $external
* @param unknown_type $resultSet
* @return unknown
*/
function generateAssociationQuery(&$model, &$linkModel, $type, $association = null, $assocData = array(), &$queryData, $external = false, &$resultSet)
{
$this->__scrubQueryData($queryData);
$joinedOnSelf = false;
if ($linkModel == null)
{
if(array_key_exists('selfJoin', $queryData))
{
return $this->generateSelfAssociationQuery($model, $linkModel, $type, $association, $assocData, $queryData, $external, $resultSet);
}
else
{
if(isset($this->__assocJoins))
{
$joinFields = ', ';
$joinFields .= join(', ', $this->__assocJoins['fields']);
}
else
{
$joinFields = null;
}
// Generates primary query
$sql = 'SELECT ' . join(', ', $this->fields($model, $model->name, $queryData['fields'])) .$joinFields. ' FROM ';
$sql .= $this->name($model->table).' AS ';
$sql .= $this->name($model->name).' ' . join(' ', $queryData['joins']).' ';
$sql .= $this->conditions($queryData['conditions']).' '.$this->order($queryData['order']);
$sql .= ' '.$this->limit($queryData['limit']);
}
return $sql;
}
$alias = $association;
if($model->name == $linkModel->name)
{
$joinedOnSelf = true;
}
switch ($type)
{
case 'hasOne':
if ($external)
{
if (isset($assocData['finderQuery']))
{
return $assocData['finderQuery'];
}
if(!isset($assocData['fields']))
{
$assocData['fields'] = '';
}
$sql = 'SELECT '.join(', ', $this->fields($linkModel, $alias, $assocData['fields']));
$sql .= ' FROM '.$this->name($linkModel->table).' AS '.$alias;
$conditions = $queryData['conditions'];
$condition = $model->escapeField($assocData['foreignKey']);
$condition .= '={$__cake_foreignKey__$}';
if (is_array($conditions))
{
$conditions[] = $condition;
}
else
{
if (trim($conditions) != '')
{
$conditions .= ' AND ';
}
$conditions .= $condition;
}
$sql .= $this->conditions($queryData['conditions']) . $this->order($queryData['order']);
$sql .= $this->limit($queryData['limit']);
return $sql;
}
else if($joinedOnSelf != true)
{
if(!isset($assocData['fields']))
{
$assocData['fields'] = '';
}
if($this->__bypass === false)
{
$fields = join(', ', $this->fields($linkModel, $alias, $assocData['fields']));
$this->__assocJoins['fields'][] = $fields;
}
else
{
$this->__assocJoins = null;
}
$sql = ' LEFT JOIN '.$this->name($linkModel->table);
$sql .= ' AS '.$this->name($alias).' ON '.$this->name($alias).'.';
$sql .= $this->name($assocData['foreignKey']).'='.$model->escapeField($model->primaryKey);
$sql .= $this->order($assocData['order']);
if (isset($assocData['conditions']) && !empty($assocData['conditions']))
{
if(is_array($queryData['conditions']))
{
$queryData['conditions'] = array_merge($assocData['conditions'], $queryData['conditions']);
}
else
{
$queryData['conditions'] = $assocData['conditions'];
}
}
if (!in_array($sql, $queryData['joins']))
{
$queryData['joins'][] = $sql;
}
return true;
}
break;
case 'belongsTo':
if ($external)
{
$conditions = $assocData['conditions'];
$sql = 'SELECT * FROM '.$this->name($linkModel->table).' AS '.$this->name($alias);
$condition = $linkModel->escapeField($assocData['foreignKey']);
$condition .= '={$__cake_id__$}';
if (is_array($conditions))
{
$conditions[] = $condition;
}
else
{
if (trim($conditions) != '')
{
$conditions .= ' AND ';
}
$conditions .= $condition;
}
$sql .= $this->conditions($queryData['conditions']) . $this->order($queryData['order']);
$sql .= $this->limit($queryData['limit']);
return $sql;
}
else if($joinedOnSelf != true)
{
if(!isset($assocData['fields']))
{
$assocData['fields'] = '';
}
if($this->__bypass === false)
{
$fields = join(', ', $this->fields($linkModel, $alias, $assocData['fields']));
$this->__assocJoins['fields'][] = $fields;
}
else
{
$this->__assocJoins = null;
}
$sql = ' LEFT JOIN '.$this->name($linkModel->table);
$sql .= ' AS ' . $this->name($alias) . ' ON ';
$sql .= $this->name($model->name).'.'.$this->name($assocData['foreignKey']);
$sql .= '='.$this->name($alias).'.'.$this->name($linkModel->primaryKey);
if (isset($assocData['conditions']) && !empty($assocData['conditions']))
{
if(is_array($queryData['conditions']))
{
$queryData['conditions'] = array_merge($assocData['conditions'], $queryData['conditions']);
}
else
{
$queryData['conditions'] = $assocData['conditions'];
}
}
if (!in_array($sql, $queryData['joins']))
{
$queryData['joins'][] = $sql;
}
return true;
}
break;
case 'hasMany':
if(isset($assocData['finderQuery']) && $assocData['finderQuery'] != null)
{
$sql = $assocData['finderQuery'];
}
else
{
$conditions = $assocData['conditions'];
$sql = 'SELECT '.join(', ', $this->fields($linkModel, $alias, $assocData['fields']));
$sql .= ' FROM '.$this->name($linkModel->table).' AS '. $this->name($alias);
if (is_array($conditions))
{
$conditions[$alias.'.'.$assocData['foreignKey']] = '{$__cake_id__$}';
}
else
{
$cond = $this->name($alias).'.'.$this->name($assocData['foreignKey']);
$cond .= '={$__cake_id__$}';
if (trim($conditions) != '')
{
$conditions .= ' AND ';
}
$conditions .= $cond;
}
$sql .= $this->conditions($conditions);
$sql .= $this->order($assocData['order']);
}
return $sql;
break;
case 'hasAndBelongsToMany':
if(isset($assocData['finderQuery']) && $assocData['finderQuery'] != null)
{
$sql = $assocData['finderQuery'];
}
else
{
$joinTbl = $this->name($assocData['joinTable']);
$sql = 'SELECT '.join(', ', $this->fields($linkModel, $alias, $assocData['fields']));
$sql .= ' FROM '.$this->name($linkModel->table).' AS '.$this->name($alias);
$sql .= ' JOIN '.$joinTbl.' ON '.$joinTbl;
$sql .= '.'.$this->name($assocData['foreignKey']).'={$__cake_id__$}';
$sql .= ' AND '.$joinTbl.'.'.$this->name($assocData['associationForeignKey']);
$sql .= ' = '.$this->name($alias).'.'.$this->name($linkModel->primaryKey);
$sql .= $this->conditions($assocData['conditions']);
$sql .= $this->order($assocData['order']);
}
return $sql;
break;
}
return null;
}
/**
* Generates and executes an SQL UPDATE statement for given model, fields, and values.
*
* @param Model $model
* @param array $fields
* @param array $values
* @return array
*/
function update (&$model, $fields = null, $values = null)
{
$updates = array();
foreach (array_combine($fields, $values) as $field => $value)
{
$updates[] = $this->name($field).'='.$this->value($value);
}
$sql = 'UPDATE '.$this->name($model->table);
$sql .= ' SET '.join(',', $updates);
$sql .= ' WHERE '.$this->name($model->primaryKey).'='.$this->value($model->getID());
return $this->execute($sql);
}
/**
* Generates and executes an SQL DELETE statement for given id on given model.
*
* @param Model $model
* @param mixed $id Primary key id number to remove.
* @return boolean Success
*/
function delete (&$model, $id = null)
{
$_id = $model->id;
if ($id != null)
{
$model->id = $id;
}
if (!is_array($model->id))
{
$model->id = array($model->id);
}
foreach ($model->id as $id)
{
$result = $this->execute('DELETE FROM '.$this->name($model->table).' WHERE '.$this->name($model->primaryKey).'='.$this->value($id));
}
if ($result)
{
return true;
}
return false;
}
/**
* Returns a key formatted like a string Model.fieldname(i.e. Post.title, or Country.name)
*
* @param unknown_type $model
* @param unknown_type $key
* @param unknown_type $assoc
* @return string
*/
function resolveKey($model, $key, $assoc = null)
{
if ($assoc == null)
{
$assoc = $model->name;
}
if (!strpos('.', $key))
{
return $this->name($model->table).'.'.$this->name($key);
}
return $key;
}
/**
* Enter description here...
*
* @param unknown_type $model
* @param unknown_type $field
*/
function getColumnType (&$model, $field)
{
$columns = $model->loadInfo();
}
/**
* Private helper method to remove query metadata in given data array.
*
* @param array $data
*/
function __scrubQueryData(&$data)
{
if (!isset($data['conditions']))
{
$data['conditions'] = ' 1 ';
}
if (!isset($data['fields']))
{
$data['fields'] = '';
}
if (!isset($data['joins']))
{
$data['joins'] = array();
}
if (!isset($data['order']))
{
$data['order'] = '';
}
if (!isset($data['limit']))
{
$data['limit'] = '';
}
}
/**
* Generates the fields list of an SQL query.
*
* @param Model $model
* @param string $alias Alias tablename
* @param mixed $fields
* @return array
*/
function fields (&$model, $alias, $fields)
{
if (is_array($fields))
{
$fields = $fields;
}
else
{
if ($fields != null)
{
if (strpos($fields, ','))
{
$fields = explode(',', $fields);
}
else
{
$fields = array($fields);
}
$fields = array_map('trim', $fields);
}
else
{
foreach ($model->_tableInfo->value as $field)
{
$fields[]= $field['name'];
}
}
}
$count = count($fields);
if ($count > 1 && $fields[0] != '*')
{
for ($i = 0; $i < $count; $i++)
{
$dot = strrpos($fields[$i], '.');
if ($dot === false)
{
$fields[$i] = $this->name($alias).'.'.$this->name($fields[$i]);
}
else
{
$build = explode('.',$fields[$i]);
$fields[$i] = $this->name($build[0]).'.'.$this->name($build[1]);
}
}
}
return $fields;
}
/**
* Creates a WHERE clause by parsing given conditions data.
*
* @param mixed $conditions Array or string of conditions
* @return string SQL fragment
*/
function conditions ($conditions)
{
$rt = '';
if (!is_array($conditions) && (!strpos(low($conditions), 'where') || strpos(low($conditions), 'where') === 0))
{
$rt = ' WHERE ';
}
if (is_string($conditions))
{
if (trim($conditions) == '')
{
$conditions = ' 1';
}
return $rt.$conditions;
}
elseif (is_array($conditions))
{
$out = array();
foreach ($conditions as $key => $value)
{
// Treat multiple values as an IN condition.
if (is_array($value))
{
$data = $key . ' IN (';
foreach ($value as $valElement)
{
$data .= $this->value($valElement) . ', ';
}
// Remove trailing ',' and complete clause.
$data[strlen($data)-2] = ')';
}
else
{
if (($value != '{$__cake_id__$}') && ($value != '{$__cake_foreignKey__$}'))
{
$value = $this->value($value);
}
//$slashedValue = $this->value($value);
//TODO: Remove the = below so LIKE and other compares can be used
$data = $key . '=';
if ($value === null)
{
$data .= 'null';
}
else
{
$data .= $value;
}
}
$out[] = $data;
}
return ' WHERE ' . join(' AND ', $out);
}
else
{
return $rt.' 1 ';
}
}
/**
* To be overridden in subclasses.
*
*/
function limit ()
{
}
/**
* Returns an ORDER BY clause as a string.
*
* @param string $key Field reference, as a key (i.e. Post.title)
* @param string $dir Direction (ASC or DESC)
* @return string ORDER BY clause
*/
function order ($key, $dir = '')
{
if (trim($key) == '')
{
return '';
}
return ' ORDER BY '.$key.' '.$dir;
}
/**
* Disconnects database, kills the connection and says the connection is closed,
* and if DEBUG is turned on, the log for this object is shown.
*
*/
function close ()
{
if ($this->fullDebug)
{
$this->showLog();
}
//$this->disconnect();
$this->_conn = NULL;
$this->connected = false;
}
/**
* Destructor. Closes connection to the database.
*
*/
function __destruct()
{
if ($this->__transactionStarted)
{
$this->rollback();
}
$this->close();
parent::__destruct();
}
/**
* Checks if the specified table contains any record matching specified SQL
*
* @param string $table Name of table to look in
* @param string $sql SQL WHERE clause (condition only, not the "WHERE" part)
* @return boolean True if the table has a matching record, else false
*/
function hasAny($table, $sql)
{
$out = $this->one("SELECT COUNT(*) AS count FROM {$table}".($sql? " WHERE {$sql}":""));
return is_array($out)? $out[0]['count']: false;
}
}
?>