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I am following a tutorial about building an ecommerce website with django and vue.js on YouTube Django And Vue Ecommerce Website Tutorial - Part 1 - Setting up - YouTube[^]

I am getting different result than what the guy on YouTube does, it's from part 6 in the tutorial Product pictures - How to build an E-commerce website using Django 3 and Vue.js - Part 6 - YouTube[^]


cart.html
{% extends 'app/base.html' %}


{% block title %}Cart{% endblock %}

{% block content %}
    <div id="cartapp">
        <h1 class="title">Cart</h1>

        {% if cart %}
            <div class="table">
                <table class="table">
                    <thead>
                        <th>Product</th>
                        <th>Quantity</th>
                        <th>Price</th>
                        <th></th>
                    </thead>

                    <tbody>
                        <tr v-for="product in products">
                            <td>[[ product.title ]]</td>
                            <td><button @click="decrementQuantity(product.id, product.quantity, product.price)">-</button>[[ product.quantity ]]<button @click="incrementQuantity(product.id, product.quantity, product.price)">+</button></td>
                            <td>$[[ product.total_price ]]</td>
                            <td><button @click="removeFromCart(product.id)">Remove from cart</button></td>
                        </tr>
                    </tbody>

                    <tfoot>
                        <tr>
                            
                            <td>Total Quantity</td>
                            <td>[[ numItems ]]</td>
                            <td>Total Price:</td>
                            <td>$[[ totalPrice ]]</td>
                        </tr>
                    </tfoot>
                </table>
            </div>
            
        {% else %}
            <p>Your cart is empty</p>
        {% endif %}
    </div>   
{% endblock %}


{% block scripts %}
    <script>
        var productapp = new Vue({
            el: '#cartapp',
            delimiters: ['[[', ']]'],
            store: store,
            data () {
                return {
                    products: [{{ productsstring|safe }}]
                }
            },
            computed: {
					numItems: function() {
						return store.state.numItems
					},
                    totalPrice: function() {
                        return parseFloat(store.state.totalPrice)
                    }
				},
            methods: {
                incrementQuantity(product_id, quantity, price) {
                    console.log('Product_id:', product_id);

                    var data = {
                    'product_id': product_id, 
                    'update': true,
                    'quantity': parseInt(quantity) + 1
                    };

                    console.log(price);

                    store.commit('increment', 1);
                    store.commit('changeTotalPrice', parseFloat(price));

                    fetch('/api/add_to_cart/', {
                        method: 'POST',
                        headers: {
                            'Content-Type': 'application/json',
                            'X-CSRFToken': '{{ csrf_token }}'
                        },
                        credentials: 'same-origin',
                        body: JSON.stringify(data)
                    })
                    .then((response) => {
                        console.log(response)

                        for (var i = 0; i < this.products.length; i++) {
                            var product = this.products[i];

                            if (product.id === product_id) {
                                this.products[i].quantity = parseInt(this.products[i].quantity) + 1;
                                this.products[i].total_price = parseInt(this.products[i].quantity) * parseFloat(this.products[i].price)
                            }
                        }
                    })
                    .catch(function (error) {
                        console.log('Error 2');
                        console.log(error);
                    })
                },

                decrementQuantity(product_id, quantity, price) {
                    console.log('Product_id:', product_id);

                    var data = {
                    'product_id': product_id, 
                    'update': true,
                    'quantity': parseInt(quantity) - 1
                    };

                    store.commit('increment', -1);
                    store.commit('changeTotalPrice', -parseFloat(price));

                    fetch('/api/add_to_cart/', {
                        method: 'POST',
                        headers: {
                            'Content-Type': 'application/json',
                            'X-CSRFToken': '{{ csrf_token }}'
                        },
                        credentials: 'same-origin',
                        body: JSON.stringify(data)
                    })
                    .then((response) => {
                        console.log(response)

                        for (var i = 0; i < this.products.length; i++) {
                            var product = this.products[i];

                            if (product.id === product_id) {
                                this.products[i].quantity = parseInt(this.products[i].quantity) - 1;
                                this.products[i].total_price = parseInt(this.products[i].quantity) * parseFloat(this.products[i].price)
                            }
                        }

                    })
                    .catch(function (error) {
                        console.log('Error 2');
                        console.log(error);
                    })
                },

                removeFromCart(product_id) {
                    console.log('Product_id:', product_id);

                    var data = {
                        'product_id': product_id
                    };

                    fetch("/api/remove_from_cart/", {
                        method: 'POST',
                        headers: {
                            'Content-Type': 'application/json',
                            'X-CSRFToken': '{{ csrf_token }}'
                        },
                        credentials: 'same-origin',
                        body: JSON.stringify(data)
                    })
                    .then((response) => {
                        console.log(response)

                        this.products = this.products.filter(product => product.id !== product_id)
                    })
                    .catch(function (error) {
                        console.log('Error 2');
                        console.log(error);
                    })
                }
            }
        });
    </script>
{% endblock %}


What I have tried:

I have looked through his code and tried to spot differences.

I have some differences, but those are meant to be different.

for example I have a DecimalField instead of a float field in the models.py, in the apps, store and order

I also have changed cost to price, because I like to call it price more than cost.
Posted
Comments
Richard Deeming 5-Aug-21 4:39am    
You'd probably be better finding a different tutorial to follow. Most YouTube coding tutorials aren't worth the paper they're printed on.

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