A foreign key constraint fails with Zend_Db_Table - mysql

Question

I have to tables and their SQL is as below:
CREATE TABLE item (
itemID INTEGER UNSIGNED AUTO_INCREMENT PRIMARY KEY NOT NULL,
name VARCHAR(100) NOT NULL,
price FLOAT NOT NULL,
stock INTEGER NOT NULL
) ENGINE = InnoDB;
CREATE TABLE salesrecord (
recordID INTEGER UNSIGNED AUTO_INCREMENT PRIMARY KEY NOT NULL,
itemID INT UNSIGNED NOT NULL,
recordDate DATE NOT NULL,
FOREIGN KEY (itemID) REFERENCES item (itemID)
) ENGINE = InnoDB;
And this is my Zend_Db_Table concrete classes:
<?php
class Store_Model_Items extends Zend_Db_Table_Abstract
{
protected $_name = 'item';
protected $_rowClass = 'Store_Model_Item';
protected $_dependTables = array('Store_Model_SalesRecords');
}
<?php
class Store_Model_SalesRecords extends Zend_Db_Table_Abstract
{
protected $_name = 'salesrecord';
protected $_referenceMap = array(
'Item' => array(
'columns' => array('itemID'),
'refTableClass' => 'Store_Model_Items',
'refColumns' => array('itemID'),
'onDelete' => self::CASCADE
)
);
}
When I try to delete a row in item table,
I get this message:
SQLSTATE[HY000]: General error: 1451 Cannot delete or update a parent row: a foreign key constraint fails (newstore/salesrecord, CONSTRAINT salesrecord_ibfk_1 FOREIGN KEY (itemID) REFERENCES item (itemID))

Answer 1

If you want delete the record from parent table, firstly you should delete related records in a child table. Also you can add ON DELETE CASCADE checking, it will help automatically delete related records in the child table. Try to recreate your FK in this way -
ALTER TABLE salesrecord
DROP FOREIGN KEY salesrecord_ibfk_1; -- change FK name here!
ALTER TABLE salesrecord
ADD CONSTRAINT salesrecord_ibfk_1 FOREIGN KEY (itemID)
REFERENCES item(itemID) ON DELETE CASCADE;
Change 'salesrecord_ibfk_1' with actual FK name.