Add foreign key on UpgradeSchema return “Foreign key constraint is incorrectly formed”?

Question

I want to add a new attribute to catalog_product_website table named id_admin_user to make relation with admin_user table.

PS: I want to do that to save the ID of the admin user who added a product.

So, I create an UpgradeSchema with this code

$setup->getConnection()->addColumn(
    $setup->getTable('catalog_product_website'),
    'id_admin_user',
    [
        'type' => Table::TYPE_INTEGER,
        'size' => null,
        'nullable' => false,
        'comment' => 'ID ADMIN USER'
    ]
);
$setup->getConnection()->addForeignKey(
    $setup->getFkName(
        'catalog_product_website',
        'id_admin_user',
        'admin_user',
        'user_id'
    ),
    $setup->getTable('catalog_product_website'),
    'id_admin_user',

    $setup->getTable('admin_user'),
    'user_id',
    Table::ACTION_CASCADE
);

But when I execute the setup:upgrade I get this error

SQLSTATE[HY000]: General error: 1005 Can't create table `magento_test`.`#sql-357_165b` (errno: 150 "Foreign key constraint is incorrectly formed")

is there any solution?

Answer 1

In your code, setup should $setup. Check following code:

$setup->getConnection()->addForeignKey(
    $setup->getFkName(
        'catalog_product_website',
        'id_admin_user',
        'admin_user',
        'user_id'
    ),
    $setup->getTable('catalog_product_website'),
    'id_admin_user',

    $installer->getTable('admin_user'),
    'user_id',
    Table::ACTION_CASCADE
);

[Update]

Try following way:

$setup->getConnection()->addColumn(
    $setup->getTable('catalog_product_website'),
    'id_admin_user',
    [
        'type' => Table::TYPE_INTEGER,
        'size' => null,
        'nullable' => false,
        'unsigned' => true,
        'comment' => 'ID ADMIN USER'
    ]
);
$setup->getConnection()->addForeignKey(
    $setup->getFkName(
        'catalog_product_website',
        'id_admin_user',
        'admin_user',
        'user_id'
    ),
    $setup->getTable('catalog_product_website'),
    'id_admin_user',

    $setup->getTable('admin_user'),
    'user_id',
    Table::ACTION_CASCADE
);