商品未显示在购物车中

Question

所以我试图在我添加的篮子中显示该项目，但没有显示任何内容。@phones.route("/cartt")def shopping_cart():total_price = 0if "cart" not in session:    flash("There is nothing in your cart.")    return render_template("phones/cart.html", display_cart = {}, total = 0)else:    items = [j for i in session["cart"] for j in i]    dict_of_phones = {}    phone_by_id = None    for item in items:        phone = get_phone_by_id(item)        print(phone.id)        total_price += phone.price        dict_of_phones = phone    return render_template('phones/cart.html', display_cart = dict_of_phones, total = total_price)html：   {% for phone in dict_of_phones %}    <tr>        <td>{{phone.model}}</td>        <td>{{phone.year}}</td>        <td>${{ "%.2f" % phone.price}}</td>        <td>${{ "%.2f" % phone.price}}</td></tr>    {% endfor %}

Answer 1

您在模板中使用了错误的变量名称。它应该是 display_cart 而不是 dict_of_phones。见下文：

{% for phone in display_cart %}

    <tr>

        <td>{{phone.model}}</td>

        <td>{{phone.year}}</td>

        <td>${{ "%.2f" % phone.price}}</td>

        <td>${{ "%.2f" % phone.price}}</td>

    </tr>    

{% endfor %}

Answer 2

我会将电话列表传递到您的模板中，而不是电话字典。此外，您dict_of_phones就是只设置到您的手机项目的最后一个值，因为你覆盖了每一次它的价值dict_of_phones = phone。所以dict_of_phones实际上只是items 中最后一个项目给出的单个电话项目：phone = get_phone_by_id(item)。也许你可以修改你的代码来创建一个电话列表？然后将此列表传递到您的jinja2模板中，大致如下：

@phones.route("/cartt")

def shopping_cart():

total_price = 0

if "cart" not in session:

    flash("There is nothing in your cart.")

    return render_template("phones/cart.html", display_cart = {}, total = 0)

else:

    # Assuming items is correct, looks off

    items = [j for i in session["cart"] for j in i]

    phones = []

    for item in items:

        phone = get_phone_by_id(item)

        print(phone.id)

        # assuming phone has id,model,year, and price attributes

        phones.append[phone]

        # note total_price of your cart not currently being used in your template

        total_price += phone.price

    return render_template('phones/cart.html', display_cart=phones, total = total_price)

然后在您的模板中，您可以执行以下操作：

{% for phone in display_cart %}

    <tr>

        <td>{{phone.model}}</td>

        <td>{{phone.year}}</td>

        <td>${{ "%.2f" % phone.price}}</td>

        <td>${{ "%.2f" % phone.price}}</td>

    </tr>    

{% endfor %}

希望这有帮助！