web/Zend/Db/Table/Row/Abstract.php
changeset 0 4eba9c11703f
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/Zend/Db/Table/Row/Abstract.php	Mon Dec 13 18:29:26 2010 +0100
@@ -0,0 +1,1203 @@
+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category   Zend
+ * @package    Zend_Db
+ * @subpackage Table
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id: Abstract.php 22229 2010-05-21 20:55:01Z ralph $
+ */
+
+/**
+ * @see Zend_Db
+ */
+require_once 'Zend/Db.php';
+
+/**
+ * @category   Zend
+ * @package    Zend_Db
+ * @subpackage Table
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+abstract class Zend_Db_Table_Row_Abstract implements ArrayAccess, IteratorAggregate
+{
+
+    /**
+     * The data for each column in the row (column_name => value).
+     * The keys must match the physical names of columns in the
+     * table for which this row is defined.
+     *
+     * @var array
+     */
+    protected $_data = array();
+
+    /**
+     * This is set to a copy of $_data when the data is fetched from
+     * a database, specified as a new tuple in the constructor, or
+     * when dirty data is posted to the database with save().
+     *
+     * @var array
+     */
+    protected $_cleanData = array();
+
+    /**
+     * Tracks columns where data has been updated. Allows more specific insert and
+     * update operations.
+     *
+     * @var array
+     */
+    protected $_modifiedFields = array();
+
+    /**
+     * Zend_Db_Table_Abstract parent class or instance.
+     *
+     * @var Zend_Db_Table_Abstract
+     */
+    protected $_table = null;
+
+    /**
+     * Connected is true if we have a reference to a live
+     * Zend_Db_Table_Abstract object.
+     * This is false after the Rowset has been deserialized.
+     *
+     * @var boolean
+     */
+    protected $_connected = true;
+
+    /**
+     * A row is marked read only if it contains columns that are not physically represented within
+     * the database schema (e.g. evaluated columns/Zend_Db_Expr columns). This can also be passed
+     * as a run-time config options as a means of protecting row data.
+     *
+     * @var boolean
+     */
+    protected $_readOnly = false;
+
+    /**
+     * Name of the class of the Zend_Db_Table_Abstract object.
+     *
+     * @var string
+     */
+    protected $_tableClass = null;
+
+    /**
+     * Primary row key(s).
+     *
+     * @var array
+     */
+    protected $_primary;
+
+    /**
+     * Constructor.
+     *
+     * Supported params for $config are:-
+     * - table       = class name or object of type Zend_Db_Table_Abstract
+     * - data        = values of columns in this row.
+     *
+     * @param  array $config OPTIONAL Array of user-specified config options.
+     * @return void
+     * @throws Zend_Db_Table_Row_Exception
+     */
+    public function __construct(array $config = array())
+    {
+        if (isset($config['table']) && $config['table'] instanceof Zend_Db_Table_Abstract) {
+            $this->_table = $config['table'];
+            $this->_tableClass = get_class($this->_table);
+        } elseif ($this->_tableClass !== null) {
+            $this->_table = $this->_getTableFromString($this->_tableClass);
+        }
+
+        if (isset($config['data'])) {
+            if (!is_array($config['data'])) {
+                require_once 'Zend/Db/Table/Row/Exception.php';
+                throw new Zend_Db_Table_Row_Exception('Data must be an array');
+            }
+            $this->_data = $config['data'];
+        }
+        if (isset($config['stored']) && $config['stored'] === true) {
+            $this->_cleanData = $this->_data;
+        }
+
+        if (isset($config['readOnly']) && $config['readOnly'] === true) {
+            $this->setReadOnly(true);
+        }
+
+        // Retrieve primary keys from table schema
+        if (($table = $this->_getTable())) {
+            $info = $table->info();
+            $this->_primary = (array) $info['primary'];
+        }
+
+        $this->init();
+    }
+
+    /**
+     * Transform a column name from the user-specified form
+     * to the physical form used in the database.
+     * You can override this method in a custom Row class
+     * to implement column name mappings, for example inflection.
+     *
+     * @param string $columnName Column name given.
+     * @return string The column name after transformation applied (none by default).
+     * @throws Zend_Db_Table_Row_Exception if the $columnName is not a string.
+     */
+    protected function _transformColumn($columnName)
+    {
+        if (!is_string($columnName)) {
+            require_once 'Zend/Db/Table/Row/Exception.php';
+            throw new Zend_Db_Table_Row_Exception('Specified column is not a string');
+        }
+        // Perform no transformation by default
+        return $columnName;
+    }
+
+    /**
+     * Retrieve row field value
+     *
+     * @param  string $columnName The user-specified column name.
+     * @return string             The corresponding column value.
+     * @throws Zend_Db_Table_Row_Exception if the $columnName is not a column in the row.
+     */
+    public function __get($columnName)
+    {
+        $columnName = $this->_transformColumn($columnName);
+        if (!array_key_exists($columnName, $this->_data)) {
+            require_once 'Zend/Db/Table/Row/Exception.php';
+            throw new Zend_Db_Table_Row_Exception("Specified column \"$columnName\" is not in the row");
+        }
+        return $this->_data[$columnName];
+    }
+
+    /**
+     * Set row field value
+     *
+     * @param  string $columnName The column key.
+     * @param  mixed  $value      The value for the property.
+     * @return void
+     * @throws Zend_Db_Table_Row_Exception
+     */
+    public function __set($columnName, $value)
+    {
+        $columnName = $this->_transformColumn($columnName);
+        if (!array_key_exists($columnName, $this->_data)) {
+            require_once 'Zend/Db/Table/Row/Exception.php';
+            throw new Zend_Db_Table_Row_Exception("Specified column \"$columnName\" is not in the row");
+        }
+        $this->_data[$columnName] = $value;
+        $this->_modifiedFields[$columnName] = true;
+    }
+
+    /**
+     * Unset row field value
+     *
+     * @param  string $columnName The column key.
+     * @return Zend_Db_Table_Row_Abstract
+     * @throws Zend_Db_Table_Row_Exception
+     */
+    public function __unset($columnName)
+    {
+        $columnName = $this->_transformColumn($columnName);
+        if (!array_key_exists($columnName, $this->_data)) {
+            require_once 'Zend/Db/Table/Row/Exception.php';
+            throw new Zend_Db_Table_Row_Exception("Specified column \"$columnName\" is not in the row");
+        }
+        if ($this->isConnected() && in_array($columnName, $this->_table->info('primary'))) {
+            require_once 'Zend/Db/Table/Row/Exception.php';
+            throw new Zend_Db_Table_Row_Exception("Specified column \"$columnName\" is a primary key and should not be unset");
+        }
+        unset($this->_data[$columnName]);
+        return $this;
+    }
+
+    /**
+     * Test existence of row field
+     *
+     * @param  string  $columnName   The column key.
+     * @return boolean
+     */
+    public function __isset($columnName)
+    {
+        $columnName = $this->_transformColumn($columnName);
+        return array_key_exists($columnName, $this->_data);
+    }
+
+    /**
+     * Store table, primary key and data in serialized object
+     *
+     * @return array
+     */
+    public function __sleep()
+    {
+        return array('_tableClass', '_primary', '_data', '_cleanData', '_readOnly' ,'_modifiedFields');
+    }
+
+    /**
+     * Setup to do on wakeup.
+     * A de-serialized Row should not be assumed to have access to a live
+     * database connection, so set _connected = false.
+     *
+     * @return void
+     */
+    public function __wakeup()
+    {
+        $this->_connected = false;
+    }
+
+    /**
+     * Proxy to __isset
+     * Required by the ArrayAccess implementation
+     *
+     * @param string $offset
+     * @return boolean
+     */
+    public function offsetExists($offset)
+    {
+        return $this->__isset($offset);
+    }
+
+    /**
+     * Proxy to __get
+     * Required by the ArrayAccess implementation
+     *
+     * @param string $offset
+     * @return string
+     */
+     public function offsetGet($offset)
+     {
+         return $this->__get($offset);
+     }
+
+     /**
+      * Proxy to __set
+      * Required by the ArrayAccess implementation
+      *
+      * @param string $offset
+      * @param mixed $value
+      */
+     public function offsetSet($offset, $value)
+     {
+         $this->__set($offset, $value);
+     }
+
+     /**
+      * Proxy to __unset
+      * Required by the ArrayAccess implementation
+      *
+      * @param string $offset
+      */
+     public function offsetUnset($offset)
+     {
+         return $this->__unset($offset);
+     }
+
+    /**
+     * Initialize object
+     *
+     * Called from {@link __construct()} as final step of object instantiation.
+     *
+     * @return void
+     */
+    public function init()
+    {
+    }
+
+    /**
+     * Returns the table object, or null if this is disconnected row
+     *
+     * @return Zend_Db_Table_Abstract|null
+     */
+    public function getTable()
+    {
+        return $this->_table;
+    }
+
+    /**
+     * Set the table object, to re-establish a live connection
+     * to the database for a Row that has been de-serialized.
+     *
+     * @param Zend_Db_Table_Abstract $table
+     * @return boolean
+     * @throws Zend_Db_Table_Row_Exception
+     */
+    public function setTable(Zend_Db_Table_Abstract $table = null)
+    {
+        if ($table == null) {
+            $this->_table = null;
+            $this->_connected = false;
+            return false;
+        }
+
+        $tableClass = get_class($table);
+        if (! $table instanceof $this->_tableClass) {
+            require_once 'Zend/Db/Table/Row/Exception.php';
+            throw new Zend_Db_Table_Row_Exception("The specified Table is of class $tableClass, expecting class to be instance of $this->_tableClass");
+        }
+
+        $this->_table = $table;
+        $this->_tableClass = $tableClass;
+
+        $info = $this->_table->info();
+
+        if ($info['cols'] != array_keys($this->_data)) {
+            require_once 'Zend/Db/Table/Row/Exception.php';
+            throw new Zend_Db_Table_Row_Exception('The specified Table does not have the same columns as the Row');
+        }
+
+        if (! array_intersect((array) $this->_primary, $info['primary']) == (array) $this->_primary) {
+
+            require_once 'Zend/Db/Table/Row/Exception.php';
+            throw new Zend_Db_Table_Row_Exception("The specified Table '$tableClass' does not have the same primary key as the Row");
+        }
+
+        $this->_connected = true;
+        return true;
+    }
+
+    /**
+     * Query the class name of the Table object for which this
+     * Row was created.
+     *
+     * @return string
+     */
+    public function getTableClass()
+    {
+        return $this->_tableClass;
+    }
+
+    /**
+     * Test the connected status of the row.
+     *
+     * @return boolean
+     */
+    public function isConnected()
+    {
+        return $this->_connected;
+    }
+
+    /**
+     * Test the read-only status of the row.
+     *
+     * @return boolean
+     */
+    public function isReadOnly()
+    {
+        return $this->_readOnly;
+    }
+
+    /**
+     * Set the read-only status of the row.
+     *
+     * @param boolean $flag
+     * @return boolean
+     */
+    public function setReadOnly($flag)
+    {
+        $this->_readOnly = (bool) $flag;
+    }
+
+    /**
+     * Returns an instance of the parent table's Zend_Db_Table_Select object.
+     *
+     * @return Zend_Db_Table_Select
+     */
+    public function select()
+    {
+        return $this->getTable()->select();
+    }
+
+    /**
+     * Saves the properties to the database.
+     *
+     * This performs an intelligent insert/update, and reloads the
+     * properties with fresh data from the table on success.
+     *
+     * @return mixed The primary key value(s), as an associative array if the
+     *     key is compound, or a scalar if the key is single-column.
+     */
+    public function save()
+    {
+        /**
+         * If the _cleanData array is empty,
+         * this is an INSERT of a new row.
+         * Otherwise it is an UPDATE.
+         */
+        if (empty($this->_cleanData)) {
+            return $this->_doInsert();
+        } else {
+            return $this->_doUpdate();
+        }
+    }
+
+    /**
+     * @return mixed The primary key value(s), as an associative array if the
+     *     key is compound, or a scalar if the key is single-column.
+     */
+    protected function _doInsert()
+    {
+        /**
+         * A read-only row cannot be saved.
+         */
+        if ($this->_readOnly === true) {
+            require_once 'Zend/Db/Table/Row/Exception.php';
+            throw new Zend_Db_Table_Row_Exception('This row has been marked read-only');
+        }
+
+        /**
+         * Run pre-INSERT logic
+         */
+        $this->_insert();
+
+        /**
+         * Execute the INSERT (this may throw an exception)
+         */
+        $data = array_intersect_key($this->_data, $this->_modifiedFields);
+        $primaryKey = $this->_getTable()->insert($data);
+
+        /**
+         * Normalize the result to an array indexed by primary key column(s).
+         * The table insert() method may return a scalar.
+         */
+        if (is_array($primaryKey)) {
+            $newPrimaryKey = $primaryKey;
+        } else {
+            //ZF-6167 Use tempPrimaryKey temporary to avoid that zend encoding fails.
+            $tempPrimaryKey = (array) $this->_primary;
+            $newPrimaryKey = array(current($tempPrimaryKey) => $primaryKey);
+        }
+
+        /**
+         * Save the new primary key value in _data.  The primary key may have
+         * been generated by a sequence or auto-increment mechanism, and this
+         * merge should be done before the _postInsert() method is run, so the
+         * new values are available for logging, etc.
+         */
+        $this->_data = array_merge($this->_data, $newPrimaryKey);
+
+        /**
+         * Run post-INSERT logic
+         */
+        $this->_postInsert();
+
+        /**
+         * Update the _cleanData to reflect that the data has been inserted.
+         */
+        $this->_refresh();
+
+        return $primaryKey;
+    }
+
+    /**
+     * @return mixed The primary key value(s), as an associative array if the
+     *     key is compound, or a scalar if the key is single-column.
+     */
+    protected function _doUpdate()
+    {
+        /**
+         * A read-only row cannot be saved.
+         */
+        if ($this->_readOnly === true) {
+            require_once 'Zend/Db/Table/Row/Exception.php';
+            throw new Zend_Db_Table_Row_Exception('This row has been marked read-only');
+        }
+
+        /**
+         * Get expressions for a WHERE clause
+         * based on the primary key value(s).
+         */
+        $where = $this->_getWhereQuery(false);
+
+        /**
+         * Run pre-UPDATE logic
+         */
+        $this->_update();
+
+        /**
+         * Compare the data to the modified fields array to discover
+         * which columns have been changed.
+         */
+        $diffData = array_intersect_key($this->_data, $this->_modifiedFields);
+
+        /**
+         * Were any of the changed columns part of the primary key?
+         */
+        $pkDiffData = array_intersect_key($diffData, array_flip((array)$this->_primary));
+
+        /**
+         * Execute cascading updates against dependent tables.
+         * Do this only if primary key value(s) were changed.
+         */
+        if (count($pkDiffData) > 0) {
+            $depTables = $this->_getTable()->getDependentTables();
+            if (!empty($depTables)) {
+                $pkNew = $this->_getPrimaryKey(true);
+                $pkOld = $this->_getPrimaryKey(false);
+                foreach ($depTables as $tableClass) {
+                    $t = $this->_getTableFromString($tableClass);
+                    $t->_cascadeUpdate($this->getTableClass(), $pkOld, $pkNew);
+                }
+            }
+        }
+
+        /**
+         * Execute the UPDATE (this may throw an exception)
+         * Do this only if data values were changed.
+         * Use the $diffData variable, so the UPDATE statement
+         * includes SET terms only for data values that changed.
+         */
+        if (count($diffData) > 0) {
+            $this->_getTable()->update($diffData, $where);
+        }
+
+        /**
+         * Run post-UPDATE logic.  Do this before the _refresh()
+         * so the _postUpdate() function can tell the difference
+         * between changed data and clean (pre-changed) data.
+         */
+        $this->_postUpdate();
+
+        /**
+         * Refresh the data just in case triggers in the RDBMS changed
+         * any columns.  Also this resets the _cleanData.
+         */
+        $this->_refresh();
+
+        /**
+         * Return the primary key value(s) as an array
+         * if the key is compound or a scalar if the key
+         * is a scalar.
+         */
+        $primaryKey = $this->_getPrimaryKey(true);
+        if (count($primaryKey) == 1) {
+            return current($primaryKey);
+        }
+
+        return $primaryKey;
+    }
+
+    /**
+     * Deletes existing rows.
+     *
+     * @return int The number of rows deleted.
+     */
+    public function delete()
+    {
+        /**
+         * A read-only row cannot be deleted.
+         */
+        if ($this->_readOnly === true) {
+            require_once 'Zend/Db/Table/Row/Exception.php';
+            throw new Zend_Db_Table_Row_Exception('This row has been marked read-only');
+        }
+
+        $where = $this->_getWhereQuery();
+
+        /**
+         * Execute pre-DELETE logic
+         */
+        $this->_delete();
+
+        /**
+         * Execute cascading deletes against dependent tables
+         */
+        $depTables = $this->_getTable()->getDependentTables();
+        if (!empty($depTables)) {
+            $pk = $this->_getPrimaryKey();
+            foreach ($depTables as $tableClass) {
+                $t = $this->_getTableFromString($tableClass);
+                $t->_cascadeDelete($this->getTableClass(), $pk);
+            }
+        }
+
+        /**
+         * Execute the DELETE (this may throw an exception)
+         */
+        $result = $this->_getTable()->delete($where);
+
+        /**
+         * Execute post-DELETE logic
+         */
+        $this->_postDelete();
+
+        /**
+         * Reset all fields to null to indicate that the row is not there
+         */
+        $this->_data = array_combine(
+            array_keys($this->_data),
+            array_fill(0, count($this->_data), null)
+        );
+
+        return $result;
+    }
+
+    public function getIterator()
+    {
+        return new ArrayIterator((array) $this->_data);
+    }
+    
+    /**
+     * Returns the column/value data as an array.
+     *
+     * @return array
+     */
+    public function toArray()
+    {
+        return (array)$this->_data;
+    }
+
+    /**
+     * Sets all data in the row from an array.
+     *
+     * @param  array $data
+     * @return Zend_Db_Table_Row_Abstract Provides a fluent interface
+     */
+    public function setFromArray(array $data)
+    {
+        $data = array_intersect_key($data, $this->_data);
+
+        foreach ($data as $columnName => $value) {
+            $this->__set($columnName, $value);
+        }
+
+        return $this;
+    }
+
+    /**
+     * Refreshes properties from the database.
+     *
+     * @return void
+     */
+    public function refresh()
+    {
+        return $this->_refresh();
+    }
+
+    /**
+     * Retrieves an instance of the parent table.
+     *
+     * @return Zend_Db_Table_Abstract
+     */
+    protected function _getTable()
+    {
+        if (!$this->_connected) {
+            require_once 'Zend/Db/Table/Row/Exception.php';
+            throw new Zend_Db_Table_Row_Exception('Cannot save a Row unless it is connected');
+        }
+        return $this->_table;
+    }
+
+    /**
+     * Retrieves an associative array of primary keys.
+     *
+     * @param bool $useDirty
+     * @return array
+     */
+    protected function _getPrimaryKey($useDirty = true)
+    {
+        if (!is_array($this->_primary)) {
+            require_once 'Zend/Db/Table/Row/Exception.php';
+            throw new Zend_Db_Table_Row_Exception("The primary key must be set as an array");
+        }
+
+        $primary = array_flip($this->_primary);
+        if ($useDirty) {
+            $array = array_intersect_key($this->_data, $primary);
+        } else {
+            $array = array_intersect_key($this->_cleanData, $primary);
+        }
+        if (count($primary) != count($array)) {
+            require_once 'Zend/Db/Table/Row/Exception.php';
+            throw new Zend_Db_Table_Row_Exception("The specified Table '$this->_tableClass' does not have the same primary key as the Row");
+        }
+        return $array;
+    }
+
+    /**
+     * Constructs where statement for retrieving row(s).
+     *
+     * @param bool $useDirty
+     * @return array
+     */
+    protected function _getWhereQuery($useDirty = true)
+    {
+        $where = array();
+        $db = $this->_getTable()->getAdapter();
+        $primaryKey = $this->_getPrimaryKey($useDirty);
+        $info = $this->_getTable()->info();
+        $metadata = $info[Zend_Db_Table_Abstract::METADATA];
+
+        // retrieve recently updated row using primary keys
+        $where = array();
+        foreach ($primaryKey as $column => $value) {
+            $tableName = $db->quoteIdentifier($info[Zend_Db_Table_Abstract::NAME], true);
+            $type = $metadata[$column]['DATA_TYPE'];
+            $columnName = $db->quoteIdentifier($column, true);
+            $where[] = $db->quoteInto("{$tableName}.{$columnName} = ?", $value, $type);
+        }
+        return $where;
+    }
+
+    /**
+     * Refreshes properties from the database.
+     *
+     * @return void
+     */
+    protected function _refresh()
+    {
+        $where = $this->_getWhereQuery();
+        $row = $this->_getTable()->fetchRow($where);
+
+        if (null === $row) {
+            require_once 'Zend/Db/Table/Row/Exception.php';
+            throw new Zend_Db_Table_Row_Exception('Cannot refresh row as parent is missing');
+        }
+
+        $this->_data = $row->toArray();
+        $this->_cleanData = $this->_data;
+        $this->_modifiedFields = array();
+    }
+
+    /**
+     * Allows pre-insert logic to be applied to row.
+     * Subclasses may override this method.
+     *
+     * @return void
+     */
+    protected function _insert()
+    {
+    }
+
+    /**
+     * Allows post-insert logic to be applied to row.
+     * Subclasses may override this method.
+     *
+     * @return void
+     */
+    protected function _postInsert()
+    {
+    }
+
+    /**
+     * Allows pre-update logic to be applied to row.
+     * Subclasses may override this method.
+     *
+     * @return void
+     */
+    protected function _update()
+    {
+    }
+
+    /**
+     * Allows post-update logic to be applied to row.
+     * Subclasses may override this method.
+     *
+     * @return void
+     */
+    protected function _postUpdate()
+    {
+    }
+
+    /**
+     * Allows pre-delete logic to be applied to row.
+     * Subclasses may override this method.
+     *
+     * @return void
+     */
+    protected function _delete()
+    {
+    }
+
+    /**
+     * Allows post-delete logic to be applied to row.
+     * Subclasses may override this method.
+     *
+     * @return void
+     */
+    protected function _postDelete()
+    {
+    }
+
+    /**
+     * Prepares a table reference for lookup.
+     *
+     * Ensures all reference keys are set and properly formatted.
+     *
+     * @param Zend_Db_Table_Abstract $dependentTable
+     * @param Zend_Db_Table_Abstract $parentTable
+     * @param string                 $ruleKey
+     * @return array
+     */
+    protected function _prepareReference(Zend_Db_Table_Abstract $dependentTable, Zend_Db_Table_Abstract $parentTable, $ruleKey)
+    {
+        $parentTableName = (get_class($parentTable) === 'Zend_Db_Table') ? $parentTable->getDefinitionConfigName() : get_class($parentTable);
+        $map = $dependentTable->getReference($parentTableName, $ruleKey);
+
+        if (!isset($map[Zend_Db_Table_Abstract::REF_COLUMNS])) {
+            $parentInfo = $parentTable->info();
+            $map[Zend_Db_Table_Abstract::REF_COLUMNS] = array_values((array) $parentInfo['primary']);
+        }
+
+        $map[Zend_Db_Table_Abstract::COLUMNS] = (array) $map[Zend_Db_Table_Abstract::COLUMNS];
+        $map[Zend_Db_Table_Abstract::REF_COLUMNS] = (array) $map[Zend_Db_Table_Abstract::REF_COLUMNS];
+
+        return $map;
+    }
+
+    /**
+     * Query a dependent table to retrieve rows matching the current row.
+     *
+     * @param string|Zend_Db_Table_Abstract  $dependentTable
+     * @param string                         OPTIONAL $ruleKey
+     * @param Zend_Db_Table_Select           OPTIONAL $select
+     * @return Zend_Db_Table_Rowset_Abstract Query result from $dependentTable
+     * @throws Zend_Db_Table_Row_Exception If $dependentTable is not a table or is not loadable.
+     */
+    public function findDependentRowset($dependentTable, $ruleKey = null, Zend_Db_Table_Select $select = null)
+    {
+        $db = $this->_getTable()->getAdapter();
+
+        if (is_string($dependentTable)) {
+            $dependentTable = $this->_getTableFromString($dependentTable);
+        }
+
+        if (!$dependentTable instanceof Zend_Db_Table_Abstract) {
+            $type = gettype($dependentTable);
+            if ($type == 'object') {
+                $type = get_class($dependentTable);
+            }
+            require_once 'Zend/Db/Table/Row/Exception.php';
+            throw new Zend_Db_Table_Row_Exception("Dependent table must be a Zend_Db_Table_Abstract, but it is $type");
+        }
+
+        // even if we are interacting between a table defined in a class and a
+        // table via extension, ensure to persist the definition
+        if (($tableDefinition = $this->_table->getDefinition()) !== null
+            && ($dependentTable->getDefinition() == null)) {
+            $dependentTable->setOptions(array(Zend_Db_Table_Abstract::DEFINITION => $tableDefinition));
+        }
+
+        if ($select === null) {
+            $select = $dependentTable->select();
+        } else {
+            $select->setTable($dependentTable);
+        }
+
+        $map = $this->_prepareReference($dependentTable, $this->_getTable(), $ruleKey);
+
+        for ($i = 0; $i < count($map[Zend_Db_Table_Abstract::COLUMNS]); ++$i) {
+            $parentColumnName = $db->foldCase($map[Zend_Db_Table_Abstract::REF_COLUMNS][$i]);
+            $value = $this->_data[$parentColumnName];
+            // Use adapter from dependent table to ensure correct query construction
+            $dependentDb = $dependentTable->getAdapter();
+            $dependentColumnName = $dependentDb->foldCase($map[Zend_Db_Table_Abstract::COLUMNS][$i]);
+            $dependentColumn = $dependentDb->quoteIdentifier($dependentColumnName, true);
+            $dependentInfo = $dependentTable->info();
+            $type = $dependentInfo[Zend_Db_Table_Abstract::METADATA][$dependentColumnName]['DATA_TYPE'];
+            $select->where("$dependentColumn = ?", $value, $type);
+        }
+
+        return $dependentTable->fetchAll($select);
+    }
+
+    /**
+     * Query a parent table to retrieve the single row matching the current row.
+     *
+     * @param string|Zend_Db_Table_Abstract $parentTable
+     * @param string                        OPTIONAL $ruleKey
+     * @param Zend_Db_Table_Select          OPTIONAL $select
+     * @return Zend_Db_Table_Row_Abstract   Query result from $parentTable
+     * @throws Zend_Db_Table_Row_Exception If $parentTable is not a table or is not loadable.
+     */
+    public function findParentRow($parentTable, $ruleKey = null, Zend_Db_Table_Select $select = null)
+    {
+        $db = $this->_getTable()->getAdapter();
+
+        if (is_string($parentTable)) {
+            $parentTable = $this->_getTableFromString($parentTable);
+        }
+
+        if (!$parentTable instanceof Zend_Db_Table_Abstract) {
+            $type = gettype($parentTable);
+            if ($type == 'object') {
+                $type = get_class($parentTable);
+            }
+            require_once 'Zend/Db/Table/Row/Exception.php';
+            throw new Zend_Db_Table_Row_Exception("Parent table must be a Zend_Db_Table_Abstract, but it is $type");
+        }
+
+        // even if we are interacting between a table defined in a class and a
+        // table via extension, ensure to persist the definition
+        if (($tableDefinition = $this->_table->getDefinition()) !== null
+            && ($parentTable->getDefinition() == null)) {
+            $parentTable->setOptions(array(Zend_Db_Table_Abstract::DEFINITION => $tableDefinition));
+        }
+
+        if ($select === null) {
+            $select = $parentTable->select();
+        } else {
+            $select->setTable($parentTable);
+        }
+
+        $map = $this->_prepareReference($this->_getTable(), $parentTable, $ruleKey);
+
+        // iterate the map, creating the proper wheres
+        for ($i = 0; $i < count($map[Zend_Db_Table_Abstract::COLUMNS]); ++$i) {
+            $dependentColumnName = $db->foldCase($map[Zend_Db_Table_Abstract::COLUMNS][$i]);
+            $value = $this->_data[$dependentColumnName];
+            // Use adapter from parent table to ensure correct query construction
+            $parentDb = $parentTable->getAdapter();
+            $parentColumnName = $parentDb->foldCase($map[Zend_Db_Table_Abstract::REF_COLUMNS][$i]);
+            $parentColumn = $parentDb->quoteIdentifier($parentColumnName, true);
+            $parentInfo = $parentTable->info();
+
+            // determine where part
+            $type     = $parentInfo[Zend_Db_Table_Abstract::METADATA][$parentColumnName]['DATA_TYPE'];
+            $nullable = $parentInfo[Zend_Db_Table_Abstract::METADATA][$parentColumnName]['NULLABLE'];
+            if ($value === null && $nullable == true) {
+                $select->where("$parentColumn IS NULL");
+            } elseif ($value === null && $nullable == false) {
+                return null;
+            } else {
+                $select->where("$parentColumn = ?", $value, $type);
+            }
+
+        }
+
+        return $parentTable->fetchRow($select);
+    }
+
+    /**
+     * @param  string|Zend_Db_Table_Abstract  $matchTable
+     * @param  string|Zend_Db_Table_Abstract  $intersectionTable
+     * @param  string                         OPTIONAL $callerRefRule
+     * @param  string                         OPTIONAL $matchRefRule
+     * @param  Zend_Db_Table_Select           OPTIONAL $select
+     * @return Zend_Db_Table_Rowset_Abstract Query result from $matchTable
+     * @throws Zend_Db_Table_Row_Exception If $matchTable or $intersectionTable is not a table class or is not loadable.
+     */
+    public function findManyToManyRowset($matchTable, $intersectionTable, $callerRefRule = null,
+                                         $matchRefRule = null, Zend_Db_Table_Select $select = null)
+    {
+        $db = $this->_getTable()->getAdapter();
+
+        if (is_string($intersectionTable)) {
+            $intersectionTable = $this->_getTableFromString($intersectionTable);
+        }
+
+        if (!$intersectionTable instanceof Zend_Db_Table_Abstract) {
+            $type = gettype($intersectionTable);
+            if ($type == 'object') {
+                $type = get_class($intersectionTable);
+            }
+            require_once 'Zend/Db/Table/Row/Exception.php';
+            throw new Zend_Db_Table_Row_Exception("Intersection table must be a Zend_Db_Table_Abstract, but it is $type");
+        }
+
+        // even if we are interacting between a table defined in a class and a
+        // table via extension, ensure to persist the definition
+        if (($tableDefinition = $this->_table->getDefinition()) !== null
+            && ($intersectionTable->getDefinition() == null)) {
+            $intersectionTable->setOptions(array(Zend_Db_Table_Abstract::DEFINITION => $tableDefinition));
+        }
+
+        if (is_string($matchTable)) {
+            $matchTable = $this->_getTableFromString($matchTable);
+        }
+
+        if (! $matchTable instanceof Zend_Db_Table_Abstract) {
+            $type = gettype($matchTable);
+            if ($type == 'object') {
+                $type = get_class($matchTable);
+            }
+            require_once 'Zend/Db/Table/Row/Exception.php';
+            throw new Zend_Db_Table_Row_Exception("Match table must be a Zend_Db_Table_Abstract, but it is $type");
+        }
+
+        // even if we are interacting between a table defined in a class and a
+        // table via extension, ensure to persist the definition
+        if (($tableDefinition = $this->_table->getDefinition()) !== null
+            && ($matchTable->getDefinition() == null)) {
+            $matchTable->setOptions(array(Zend_Db_Table_Abstract::DEFINITION => $tableDefinition));
+        }
+
+        if ($select === null) {
+            $select = $matchTable->select();
+        } else {
+            $select->setTable($matchTable);
+        }
+
+        // Use adapter from intersection table to ensure correct query construction
+        $interInfo = $intersectionTable->info();
+        $interDb   = $intersectionTable->getAdapter();
+        $interName = $interInfo['name'];
+        $interSchema = isset($interInfo['schema']) ? $interInfo['schema'] : null;
+        $matchInfo = $matchTable->info();
+        $matchName = $matchInfo['name'];
+        $matchSchema = isset($matchInfo['schema']) ? $matchInfo['schema'] : null;
+
+        $matchMap = $this->_prepareReference($intersectionTable, $matchTable, $matchRefRule);
+
+        for ($i = 0; $i < count($matchMap[Zend_Db_Table_Abstract::COLUMNS]); ++$i) {
+            $interCol = $interDb->quoteIdentifier('i' . '.' . $matchMap[Zend_Db_Table_Abstract::COLUMNS][$i], true);
+            $matchCol = $interDb->quoteIdentifier('m' . '.' . $matchMap[Zend_Db_Table_Abstract::REF_COLUMNS][$i], true);
+            $joinCond[] = "$interCol = $matchCol";
+        }
+        $joinCond = implode(' AND ', $joinCond);
+
+        $select->from(array('i' => $interName), array(), $interSchema)
+               ->joinInner(array('m' => $matchName), $joinCond, Zend_Db_Select::SQL_WILDCARD, $matchSchema)
+               ->setIntegrityCheck(false);
+
+        $callerMap = $this->_prepareReference($intersectionTable, $this->_getTable(), $callerRefRule);
+
+        for ($i = 0; $i < count($callerMap[Zend_Db_Table_Abstract::COLUMNS]); ++$i) {
+            $callerColumnName = $db->foldCase($callerMap[Zend_Db_Table_Abstract::REF_COLUMNS][$i]);
+            $value = $this->_data[$callerColumnName];
+            $interColumnName = $interDb->foldCase($callerMap[Zend_Db_Table_Abstract::COLUMNS][$i]);
+            $interCol = $interDb->quoteIdentifier("i.$interColumnName", true);
+            $interInfo = $intersectionTable->info();
+            $type = $interInfo[Zend_Db_Table_Abstract::METADATA][$interColumnName]['DATA_TYPE'];
+            $select->where($interDb->quoteInto("$interCol = ?", $value, $type));
+        }
+
+        $stmt = $select->query();
+
+        $config = array(
+            'table'    => $matchTable,
+            'data'     => $stmt->fetchAll(Zend_Db::FETCH_ASSOC),
+            'rowClass' => $matchTable->getRowClass(),
+            'readOnly' => false,
+            'stored'   => true
+        );
+
+        $rowsetClass = $matchTable->getRowsetClass();
+        if (!class_exists($rowsetClass)) {
+            try {
+                require_once 'Zend/Loader.php';
+                Zend_Loader::loadClass($rowsetClass);
+            } catch (Zend_Exception $e) {
+                require_once 'Zend/Db/Table/Row/Exception.php';
+                throw new Zend_Db_Table_Row_Exception($e->getMessage(), $e->getCode(), $e);
+            }
+        }
+        $rowset = new $rowsetClass($config);
+        return $rowset;
+    }
+
+    /**
+     * Turn magic function calls into non-magic function calls
+     * to the above methods.
+     *
+     * @param string $method
+     * @param array $args OPTIONAL Zend_Db_Table_Select query modifier
+     * @return Zend_Db_Table_Row_Abstract|Zend_Db_Table_Rowset_Abstract
+     * @throws Zend_Db_Table_Row_Exception If an invalid method is called.
+     */
+    public function __call($method, array $args)
+    {
+        $matches = array();
+
+        if (count($args) && $args[0] instanceof Zend_Db_Table_Select) {
+            $select = $args[0];
+        } else {
+            $select = null;
+        }
+
+        /**
+         * Recognize methods for Has-Many cases:
+         * findParent<Class>()
+         * findParent<Class>By<Rule>()
+         * Use the non-greedy pattern repeat modifier e.g. \w+?
+         */
+        if (preg_match('/^findParent(\w+?)(?:By(\w+))?$/', $method, $matches)) {
+            $class    = $matches[1];
+            $ruleKey1 = isset($matches[2]) ? $matches[2] : null;
+            return $this->findParentRow($class, $ruleKey1, $select);
+        }
+
+        /**
+         * Recognize methods for Many-to-Many cases:
+         * find<Class1>Via<Class2>()
+         * find<Class1>Via<Class2>By<Rule>()
+         * find<Class1>Via<Class2>By<Rule1>And<Rule2>()
+         * Use the non-greedy pattern repeat modifier e.g. \w+?
+         */
+        if (preg_match('/^find(\w+?)Via(\w+?)(?:By(\w+?)(?:And(\w+))?)?$/', $method, $matches)) {
+            $class    = $matches[1];
+            $viaClass = $matches[2];
+            $ruleKey1 = isset($matches[3]) ? $matches[3] : null;
+            $ruleKey2 = isset($matches[4]) ? $matches[4] : null;
+            return $this->findManyToManyRowset($class, $viaClass, $ruleKey1, $ruleKey2, $select);
+        }
+
+        /**
+         * Recognize methods for Belongs-To cases:
+         * find<Class>()
+         * find<Class>By<Rule>()
+         * Use the non-greedy pattern repeat modifier e.g. \w+?
+         */
+        if (preg_match('/^find(\w+?)(?:By(\w+))?$/', $method, $matches)) {
+            $class    = $matches[1];
+            $ruleKey1 = isset($matches[2]) ? $matches[2] : null;
+            return $this->findDependentRowset($class, $ruleKey1, $select);
+        }
+
+        require_once 'Zend/Db/Table/Row/Exception.php';
+        throw new Zend_Db_Table_Row_Exception("Unrecognized method '$method()'");
+    }
+
+
+    /**
+     * _getTableFromString
+     *
+     * @param string $tableName
+     * @return Zend_Db_Table_Abstract
+     */
+    protected function _getTableFromString($tableName)
+    {
+
+        if ($this->_table instanceof Zend_Db_Table_Abstract) {
+            $tableDefinition = $this->_table->getDefinition();
+
+            if ($tableDefinition !== null && $tableDefinition->hasTableConfig($tableName)) {
+                return new Zend_Db_Table($tableName, $tableDefinition);
+            }
+        }
+
+        // assume the tableName is the class name
+        if (!class_exists($tableName)) {
+            try {
+                require_once 'Zend/Loader.php';
+                Zend_Loader::loadClass($tableName);
+            } catch (Zend_Exception $e) {
+                require_once 'Zend/Db/Table/Row/Exception.php';
+                throw new Zend_Db_Table_Row_Exception($e->getMessage(), $e->getCode(), $e);
+            }
+        }
+
+        $options = array();
+
+        if (($table = $this->_getTable())) {
+            $options['db'] = $table->getAdapter();
+        }
+
+        if (isset($tableDefinition) && $tableDefinition !== null) {
+            $options[Zend_Db_Table_Abstract::DEFINITION] = $tableDefinition;
+        }
+
+        return new $tableName($options);
+    }
+
+}