Django 14购物商城项目（购物车商品选中逻辑）

1、单个商品选中逻辑

（代码在【Django 14购物商城项目】中已经有）

1.1、最终效果展示

1.2、html

没有点击事件时，获取前端出过来的参数C_is_select判断

1.3、js

点击事件发生时，点击时通过异步请求/axf/changecart/到views里面的changecart获得和传输选中状态的数据

1.4、views.py

收到js发过来的异步请求后，进行数据处理

记得这一步是要判断用户登录状态的，所以记得在中间件里面加入changecart的路由

路由

2、购物车全选

2.1、逻辑

2.2、html

2.3、css

这里新加了all_select，修改了css里的好几处，下面是cart.css里目前所有内容

/*底部图标*/
footer .cart span {
    background: url(/static/img/cart_selected.png) no-repeat;
    background-size: 0.513889rem;
}

footer .cart dd {
    color: orange;
}

/*内容*/
#cart {
    padding: 1.5rem 0;
    z-index: +15;
    width: 100%;
    background: #fafafa;
    overflow: hidden;
}

h3 {
    text-align: center;
    position: fixed;
    width: 100%;
    border-bottom: 0.04rem solid lightgray;
    line-height: 1.5rem;
    background: yellow;
    top: 0;
    z-index: +100;
}

.full > section {
    background: lightpink;
}

.full > section > ul {
    border: 0.2rem dashed lightgreen;
    border-width: 0.1rem 0;
    margin-bottom: 0.2rem;
}

.full > section > ul > li {
    padding-left: 0.3rem;
    line-height: 0.8rem;
    font-size: 0.375rem;
}

.clear:after {
    content: "";
    display: block;
    visibility: hidden;
    clear: both;
    height: 0;
}

.full > section > ul > li > div > p:last-child {
    float: right;
    width: 78%;
}

.full > section > ul > li > div > p:last-child > span {
    padding: 0.15rem;
}

.infoJustify {
    float: left;
    width: 20%;
    height: 0.8rem;
    overflow: hidden;
    text-align: justify;
}

.infoJustify b {
    display: inline-block;
}

.change {
    float: right;
    padding-right: 0.2rem;
}

/*闪送超市*/
.bill {
    line-height: 0.75rem;
    position: relative;
    border-bottom: 0.04rem solid lightgreen;
}

.bill > p {
    padding: 0 0.3rem;
    font-size: 0.3rem;
    color: #d35a00;

}

.bill > p:first-child:before {
    width: 0.2rem;
    height: 0.3rem;
    background: yellow;
    content: ".";
    color: yellow;
    margin-right: 0.2rem;

}

.bill > a {
    border: 0.05rem solid orangered;
    position: absolute;
    border-radius: 0.3rem;
    padding: 0 0.3rem;
    font-size: 0.35rem;
    line-height: 0.65rem;
    top: 0.2rem;
    right: 0.5rem;
}

/*收货时间，收货备注*/
.delivery {
    line-height: 1.5rem;
    border-bottom: 0.04rem solid lightgray;
    font-size: 0.4rem;
    padding: 0 0.3rem;
}

.delivery > span:first-child {
    padding-right: 0.3rem;

}

.delivery > span:nth-child(2) {
    color: orangered;
}

.delivery > span:last-child {
    float: right;

}

.delivery > input {
    height: 0.8rem;
    line-height: 0.8rem;
    border-radius: 0.1rem;
    border-width: 0.04rem;
    width: 70%;

}

.menuList {
    border-bottom: 0.04rem solid lightgray;
    height: 2.5rem;
    position: relative;

}

.confirm , .all_select{
    padding: 0.95rem 0;
    width: 15%;
    height: 2.5rem;
    display: inline-block;
    box-sizing: border-box;
    text-align: center;
    float: left;
}

.confirm > span , .all_select> span{
    box-sizing: border-box;
    border: 0.04rem solid orange;
    background: white;
    display: inline-block;
    width: 0.6rem;
    height: 0.6rem;
    overflow: hidden;
    border-radius: 50%;
    line-height: 0.6rem;
}

.confirm > span > span ,.all_select> span > span{
    background: yellow;
    font-size: 0.5rem;
    display: block;

}

.menuList > a {
    width: 84%;
    display: inline-block;
    font-size: 0.4rem;
    line-height: 1rem;

}

.menuList > a > img {
    margin-top: 0.25rem;
    width: 25%;
    height: 100%;
    float: left;
}

.menuList > a > p {
    width: 70%;
    height: 1rem;
    float: right;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    /*去除a标签的连接蓝色属性 text-decoration设置文本修饰属性*/
    text-decoration: none;
    color: #333;
}

.menuList > section {
    position: absolute;
    right: 0.4rem;
    bottom: 0.4rem;
    height: 0.75rem;
    border-radius: 1rem;
}

.menuList > section > button {
    background: white;
    border: 1px solid orange;
    border-radius: 1111px;
    color: red;
    display: inline-block;
    text-align: center;
    line-height: 0.65rem;
    font-weight: 900;
    width: 0.75rem;
    height: 0.75rem;
}

.menuList > section > span {
    display: inline-block;
    width: 0.5rem;
    text-align: center;
    line-height: 0.5rem;
    font-size: 0.4rem;

}

.presenPrice:before {
    content: "￥";
    font-size: 0.33rem;

}

/*下单，付钱*/
.payTheBill {
    height: 1.5rem;
    position: relative;
}

.payTheBill .all_select {
    width: 10%;
    padding-top: 0.4rem;
    padding-left: 0.4rem;

}

.payTheBill > p {
    line-height: 1.5rem;
    text-indent: 0.3rem;

}

.payTheBill > p > span:first-child {
    padding-right: 0.8rem;

}

.payTheBill > p > span:last-child {
    padding-left: 0.3rem;
    color: red;

}

.payTheBill > p > span:last-child:before {
    content: "￥";
    font-size: 0.35rem;
}

.payTheBill > a {
    padding: 0 0.7rem;
    line-height: 1.5rem;
    background: yellow;
    position: absolute;
    right: 0;
    top: 0;
}

部分修改处截图：

2.4、js

第一处添加（红色部分为添加的）

                if (data["is_all_select"]) {
                   $(".all_select").find("span").find("span").html("√");
                } else {
                    $(".all_select").find("span").find("span").html("");
                }

第二处添加（红色部分为添加的）

$(".all_select").click(function () {
        var $all_select = $(this);
        var select_list = [];
        var unselect_list = [];

        $(".confirm").each(function () {
            var $confirm = $(this);
            var cartid = $confirm.parents("li").attr("cartid");
            if ($confirm.find("span").find("span").html().trim()) {
                select_list.push(cartid);
            } else {
                unselect_list.push(cartid);
            }
        });
        if (unselect_list.length > 0) {
            $.getJSON("/axf/allselect", {"cart_list": unselect_list.join("#")}, function (data) {
                console.log(data);
                if (data["status"] === 200) {
                    // 所有的商品变成选中状态
                    $(".confirm").find("span").find("span").html('√');
                    // ”全选“变成选中状态
                    $all_select.find("span").find("span").html('√');
                }
            });
        } else {
            if (select_list.length > 0) {
                $.getJSON("/axf/allselect", {"cart_list": select_list.join("#")}, function (data) {
                    console.log(data);
                    if (data["status"] === 200) {
                        // 所有的商品变成选中状态
                        $(".confirm").find("span").find("span").html('');
                        // ”全选“变成选中状态
                        $all_select.find("span").find("span").html('');
                    }
                });
            }
        }

    });

2.5、视图

1、（红色部分为添加的）

2、（红色部分为添加的）

def all_select(request):
    cart_list = request.GET.get('cart_list')
    cart_list = cart_list.split("#")
    carts = Cart.objects.filter(id__in=cart_list)
    for cart in carts:
        cart.C_is_select = not cart.C_is_select
        cart.save()

    print(cart_list)
    data = {
        "status": 200,

    }
    return JsonResponse(data=data)

2.6、路由