Magento 1.9 : Programmatically created cart not showing on frontend

Question

I have below code to create cart and addProduct :

$quote = Mage::getModel('sales/quote')->setStoreId(1);
$quote->assignCustomer($customer);
$product = Mage::getModel('catalog/product')->load($productId);
$quote->addProduct($product, new Varien_Object(array('qty' => 1)));
$quote->save();

Above code creating corresponding rows in quote tables, but when I'm checking on frontend cart page for same customer then I'm getting Cart is empty on cart page.

But when I try to addproduct in existing cart which is created from frontend using below code :

$quote = Mage::getModel('sales/quote')->load($cartId);
$quote->assignCustomer($customer);
$product = Mage::getModel('catalog/product')->load($productId);
$quote->addProduct($product, new Varien_Object(array('qty' => 1)));
$quote->save();

then the programmatically added product is coming on frontend.

Why this is happening?

Answer 1

I think issue in your first code snippet is that, when you add product into cart and assign this product to customer Magento create a new entry in sales_flat_quote table but the flag is_active is 0. So whenever you try to check frontend cart page for same customer, Magento load the quote with is_active 1 (If quote not found with is_active then It create a new quote).

So to solve this problem just set the flag is_active to 1. So your full code snippets looks like this,

$quote = Mage::getModel('sales/quote')->setStoreId(1);
$quote->assignCustomer($customer);
$product = Mage::getModel('catalog/product')->load($productId);
$quote->addProduct($product, new Varien_Object(array('qty' => 1)));
$quote->setData('is_active', 1); // only add this line
$quote->save();