Set Limit product on cart

[30ml]

hi, I am hang on ajax stuff. Normally user click on add to cart button to add into cart. But I want to stop to add product in cart once cart have 1 quantity . So, what would be the process.
Is is necessary to scratch cart controller and manage it in override folder ? Is it good idea ? if not what would be the next idea ?

 

Thanks

[vekia]

you want to prevent to add more than the 1 product to cart?  or to prevent to add more products (no matter what product) to cart?

[30ml]

I want to prevent more than 1 product in cart. Here, I solve my problem by putting below code in Cartcontroller.php on  processChangeProductInCart method

if ($this->context->cart->nbProducts() == 1){
		$this->errors[] = Tools::displayError('You can not add more than 1 quantity in cart.');
		}

Most probably, I will put this file in overrise/controller/front. Can I do such control from my customize module ?

 

you want to prevent to add more than the 1 product to cart?  or to prevent to add more products (no matter what product) to cart?

[30ml]

now user can not put more than one product in a cart. But I am finding solution if I can do through my module.

 

I want to prevent more than 1 product in cart. Here, I solve my problem by putting below code in Cartcontroller.php on  processChangeProductInCart method

if ($this->context->cart->nbProducts() == 1){
		$this->errors[] = Tools::displayError('You can not add more than 1 quantity in cart.');
		}

Most probably, I will put this file in overrise/controller/front. Can I do such control from my customize module ?