Add basic implementation of deleteAll().

lib/Cake/ORM/Table.php

@@ -506,4 +506,27 @@ public function updateAll($fields, $conditions) {
 		return true;
 	}
 
+/**
+ * Delete all matching rows.
+ *
+ * Deletes all rows matching the provided conditions.
+ *
+ * This method will *not* trigger beforeDelete/afterDelete events. If you
+ * need those first load a collection of records and delete them.
+ *
+ * This method will *not* execute on associations `cascade` attribute. You should
+ * use database foreign keys + ON CASCADE rules if you need cascading deletes combined
+ * with this method.
+ *
+ * @param array $conditions An array of conditions, similar to those used with find()
+ * @return boolean Success
+ */
+	public function deleteAll($conditions) {
+		$query = $this->_buildQuery();
+		$query->delete($this->table())
+			->where($conditions);
+		$query->execute();
+		return true;
+	}
+
 }

lib/Cake/Test/TestCase/ORM/TableTest.php

@@ -412,4 +412,40 @@ public function testUpdateAllFailure() {
 		$table->updateAll(['username' => 'mark'], []);
 	}
 
+/**
+ * Test deleting many records.
+ *
+ * @return void
+ */
+	public function testDeleteAll() {
+		$table = new Table(['table' => 'users', 'connection' => $this->connection]);
+		$result = $table->deleteAll(['id <' => 4]);
+		$this->assertTrue($result);
+
+		$result = $table->find('all')->toArray();
+		$this->assertCount(1, $result, 'Only one record should remain');
+		$this->assertEquals(4, $result[0]['id']);
+	}
+
+/**
+ * Test that exceptions from the Query bubble up.
+ *
+ * @expectedException Cake\Database\Exception
+ */
+	public function testDeleteAllFailure() {
+		$table = $this->getMock(
+			'Cake\ORM\Table',
+			['_buildQuery'],
+			['table' => 'users', 'connection' => $this->connection]
+		);
+		$query = $this->getMock('Cake\ORM\Query', ['execute'], [$this->connection]);
+		$table->expects($this->once())
+			->method('_buildQuery')
+			->will($this->returnValue($query));
+		$query->expects($this->once())
+			->method('execute')
+			->will($this->throwException(new \Cake\Database\Exception('Not good')));
+		$table->deleteAll(['id >' => 4]);
+	}
+
 }