Using + - button in addtocart.html

[Jesus82]

Hi, is it be possible to use +- buttons instead of the select element in the addtocart.html template? (so it would work like the <button ng-click="item.setQuantity(1, true)"> in cart.html ) Thanks!

[dobromir-hristov]

Yes, I have made it work like that; You have to make two functions that you can call on click on your + and - buttons. Here are them respectively:

 increaseQuantity: (slug)=> {
            let item = ngCart.getItemById(slug);
            if (typeof item === 'object') {
                item.setQuantity(1, true);
            } else {
                let bottle = bottles[slug];
                ngCart.addItem(bottle.slug, bottle.name, bottle.price, 1, "none");
            }
        },
        decreaseQuantity: (slug)=> {
            let item = ngCart.getItemById(slug);
            if (item) {
                if (item.getQuantity() > 1) {
                    item.setQuantity(-1, true);
                } else {
                    ngCart.removeItemById(slug)
                }
            } else {
                return false;
            }
        }

I get my items from my Bottles array, but you can get the picture. A warning here! This will NOT update your LocalStorage because they removed an event broadcast from the item.setQuantity() method.

[Jesus82]

Thanks for the answer. I have started recently with angular, so my knowledge is very limited, so it may be a very basic question: should I put the functions in my controller or anywhere in the ng-cart directive? Thanks!

[dobromir-hristov]

You should not edit the sources you get. So you should make a directive, that gives you the + and - buttons, like <cart-quantities/> something like this. Then inside its $scope you can define these functions.
That way inside the cart-quantitie`s template you can use ng-click="decreaseQuantity()" and so on.

[Jesus82]

Ok, I get it now, thanks for the answer!

[dobromir-hristov]

Dont forget to Inject ngCart into your directive.

[Jesus82]

Thanks for the tip, I will do so!

[Jesus82]

@dobromir-hristov
I am now trying to implement your solution, but I had no success in including the function into the scope. Could you give it a look to see if you can figure out what I'm doing wrong? Thanks!

app.directive('changeQuantity', ['ngCart', function(ngCart){
    return {
        restrict : 'EA',
        scope: {
            increaseQuantity = function(slug) {
                let item = ngCart.getItemById(slug);
                if (typeof item === 'object') {
                    item.setQuantity(1, true);
                } else {
                    let names = names[slug];
                    ngCart.addItem(names.slug, names.name, names.price, 1, "none");
                }
            }
        },
        templateUrl: {
            <button class="btn-masmenos" ng-click="increaseQuantity()">+</button>
        }
    };
}]);

[dobromir-hristov]

Change that let item = ... into a var item = also the let names
Also your let names = names[slug]; this is not right. I have an object bottles where i store all my products, in my case bottles of alcohol, then i get only one bottle by its slug thats where let bottle = bottles[slug] comes in. This is so I could then pass the slug, name and price to the ngCart.addItem method.