first draft for sqlite cascading delete emulation with triggers

lib/Doctrine/Export/Sqlite.php

@@ -159,14 +159,20 @@ class Doctrine_Export_Sqlite extends Doctrine_Export
         }
         
         // sqlite doesn't support foreign key declaration but it parses those anyway
+        
+        $fk = array();
         if (isset($options['foreignKeys']) && ! empty($options['foreignKeys'])) {
-            foreach($options['foreignKeys'] as $definition) {
+            foreach ($options['foreignKeys'] as $definition) {
-                $queryFields .= ', ' . $this->getForeignKeyDeclaration($definition);
+                //$queryFields .= ', ' . $this->getForeignKeyDeclaration($definition);
+
+                if (isset($definition['onDelete'])) {
+                    $fk[] = $definition;
+                }
             }
         }
 
         if (isset($options['indexes']) && ! empty($options['indexes'])) {
-            foreach($options['indexes'] as $index => $definition) {
+            foreach ($options['indexes'] as $index => $definition) {
                 $queryFields .= ', ' . $this->getIndexDeclaration($index, $definition);
             }
         }
@@ -174,7 +180,38 @@ class Doctrine_Export_Sqlite extends Doctrine_Export
         $name  = $this->conn->quoteIdentifier($name, true);
         $query = 'CREATE TABLE ' . $name . ' (' . $queryFields . ')';
 
-        return $this->conn->exec($query);
+        try {
+            if ( ! empty($fk)) {
+                $this->conn->beginTransaction();
+            }
+            $ret   = $this->conn->exec($query);
+
+            if ( ! empty($fk)) {
+                foreach ($fk as $definition) {
+
+                    $query = 'CREATE TRIGGER doctrine_' . $name . '_cscd_delete '
+                           . 'AFTER DELETE ON ' . $name . ' FOR EACH STATEMENT '
+                           . 'BEGIN '
+                           . 'DELETE FROM ' . $definition['foreignTable'] . ' WHERE ';
+
+                    $local = (array) $definition['local'];
+                    foreach((array) $definition['foreign'] as $k => $field) {
+                        $query .= $field . ' = old.' . $local[$k] . ';';
+                    }
+
+                    $query .= 'END;';
+
+                    $this->conn->exec($query);
+                }
+
+                $this->conn->commit();
+            }
+        } catch(Doctrine_Exception $e) {
+
+            $this->conn->rollback();
+
+            throw $e;
+        }
     }
     /**
      * create sequence

lib/Doctrine/Table.php

@@ -1121,9 +1121,10 @@ class Doctrine_Table extends Doctrine_Configurable implements Countable
         if ( ! is_array($key)) {
             $key = array($key);
         }
+
         foreach ($key as $k) {
             if ( ! isset($this->data[$k])) {
-                throw new Doctrine_Exception("Primary key value for $k wasn't found");
+                throw new Doctrine_Table_Exception("Primary key value for $k wasn't found");
             }
             $id[] = $this->data[$k];
         }

tests/Export/SqliteTestCase.php

@@ -1,4 +1,35 @@
 <?php
+/*
+ *  $Id$
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the LGPL. For more information, see
+ * <http://www.phpdoctrine.com>.
+ */
+
+/**
+ * Doctrine_Export_Sqlite_TestCase
+ *
+ * @package     Doctrine
+ * @author      Konsta Vesterinen <kvesteri@cc.hut.fi>
+ * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
+ * @category    Object Relational Mapping
+ * @link        www.phpdoctrine.com
+ * @since       1.0
+ * @version     $Revision$
+ */
 class Doctrine_Export_Sqlite_TestCase extends Doctrine_UnitTestCase {
     public function testCreateDatabaseDoesNotExecuteSql() {
         try {
@@ -91,11 +122,15 @@ class Doctrine_Export_Sqlite_TestCase extends Doctrine_UnitTestCase {
         
         $this->assertEqual($this->adapter->pop(), 'CREATE TABLE sometable (id INTEGER UNSIGNED PRIMARY KEY AUTOINCREMENT, name VARCHAR(4), INDEX myindex (id ASC, name DESC))');
     }
-    public function testExportSupportsForeignKeys()
+    public function testExportSupportsEmulationOfCascadingDeletes()
     {
         $r = new ForeignKeyTest;
         
-        $this->assertEqual($this->adapter->pop(), 'CREATE TABLE foreign_key_test (id INTEGER PRIMARY KEY AUTOINCREMENT, name VARCHAR(2147483647), code INTEGER, content VARCHAR(4000), parent_id INTEGER, FOREIGN KEY parent_id REFERENCES foreign_key_test(id), FOREIGN KEY id REFERENCES foreign_key_test(parent_id) ON UPDATE RESTRICT ON DELETE CASCADE)');
+        $this->assertEqual($this->adapter->pop(), 'COMMIT');
+        $this->assertEqual($this->adapter->pop(), 'CREATE TRIGGER doctrine_foreign_key_test_cscd_delete AFTER DELETE ON foreign_key_test BEGIN DELETE FROM foreign_key_test WHERE parent_id = old.id;END;');
+        $this->assertEqual($this->adapter->pop(), 'CREATE TABLE foreign_key_test (id INTEGER PRIMARY KEY AUTOINCREMENT, name VARCHAR(2147483647), code INTEGER, content VARCHAR(4000), parent_id INTEGER)');
+        $this->assertEqual($this->adapter->pop(), 'BEGIN TRANSACTION');
     }
+
 }
 ?>