DJANGO-天天生鲜项目从0到1-012-订单-用户订单页面

本项目基于B站UP主‘神奇的老黄’的教学视频‘天天生鲜Django项目’，视频讲的非常好，推荐新手观看学习

https://www.bilibili.com/video/BV1vt41147K8?p=1

用户中心-订单页面展示

编辑user/view.py文件，新增类UserOrderView

class UserOrderView(LoginRequiredMixin, View):
    '''用户中心订单类'''
    template_name = 'user/user_center_order.html'
    context = {'type': ''}

    def get(self, request, page_num):
        '''显示用户订单'''
        self.context['type'] = 'order'
        user = request.user
        # 获取订单信息
        orders = OrderInfo.objects.filter(user=user).order_by('-create_time')
        # 遍历订单头
        for order in orders:
            order_goods_list = OrderGoods.objects.filter(order=order)
            # 动态给order增加属性
            order.order_goods_list = order_goods_list
            order.status_name = OrderInfo.ORDER_STATUS_DIC[order.order_status]
            order.method_name = OrderInfo.PAY_METHOD_DIC[str(order.pay_method)]
            # 遍历订单行
            for order_goods in order_goods_list:
                # 动态给order_goods增加属性
                order_goods.amount = order_goods.price * order_goods.count

        # 分页
        # 创建Paginator对象
        paginator = Paginator(orders, 3)
        total_page = paginator.num_pages
        # 校验参数页码
        if page_num > total_page:
            page_num = 1
        # 获取Page对象
        page = paginator.page(page_num)
        # 页码,页面上最多显示3页
        if total_page < 3:
            pages = range(1, total_page + 1)
        elif page_num < 2:
            pages = range(1, 4)
        elif page_num > total_page - 1:
            pages = range(total_page-2, total_page+1)
        else:
            pages = range(page_num-1, page_num + 2)
        # 组织上下文
        self.context['page'] = page
        self.context['pages'] = pages
        return render(request, self.template_name, self.context)

1. 获取登录用户的订单头orders，循环遍历头，获取头下面对应的订单行order_goods，处理这种将头行结构传给模板时，可以先遍历头，然后查询出头下面的行，将返回的查询结果集当做一个属性，添加给头。这样只需要将头传递给模板文件即可

# 遍历头
for header in headers:
        # 查询行结果集
        lines = Line.objects.filter(header=header)
        # 将行结果集当做属性添加给头
        header.lines = lines
# 将数据传递给模板文件
return render(request, template_name, {'headers': headers})
...
# 在模板文件中遍历头行
{% for header in headers %}
....
　　{% for line in header.lins %}
　　...
　　{% end for %}
{% end for %}

2. 分页，在url中加入参数<int:pag_num>，展示具体第几页：

• 导入分页模块：from django.core.paginator import Paginator
• 根据订单头创建分页对象，每页显示三个订单：paginator = Paginator(orders, 3)
• 校验url页码参数，若有误则将页码变量重置为第一页
• 获取页码页面的page对象：page = paginator.page(page_num)
• 设置页面下方页码列表的展示，如只展示5个页码

# 页码,页面上最多显示5页
# 显示的最小页码
min_page = page_num - 2
# 显示的最大页码
max_page = page_num + 2
# 若最小页码小于1，则设置最小页码为1
# 并将小于的值加在最大页码上，保证最小页码到最大页码有5页
diff = min_page - 1
if diff < 0:
    min_page = 1
    max_page -= diff
# 若最大页码大于总页数，则设置最大页码为总页数
# 并将大于的值减在最小页码上，保证最小页码到最大页码有5页
diff = max_page - total_page
if diff > 0:
    max_page = total_page
    min_page -= diff
# 设置显示的页码范围
pages = range(min_page, max_page + 1)

组织上下文，将page对象和页码列表传给模板：

# 组织上下文
self.context['page'] = page
self.context['pages'] = pages
return render(request, self.template_name, self.context)

编辑url和模板文件

{% extends 'base_user_center.html' %}
{% load static %}
{% block right %}
<div class="right_content clearfix">
    <h3 class="common_title2">全部订单</h3>
    {% for order in page %}
    <ul class="order_list_th w978 clearfix">
        <li class="col01">{{ order.create_time }}</li>
        <li class="col02">{{ order.order_num }}</li>
        <li class="col02 stress">{{ order.status_name }}</li>
    </ul>

    <table class="order_list_table w980">
        <tbody>
            <tr>
                <td width="55%">
                    {% for order_goods in order.order_goods_list %}
                    <ul class="order_goods_list clearfix">
                        <li class="col01"><a href="{% url 'goods:detail' order_goods.goods.id %}"><img src="{{ order_goods.goods.image.url }}"></a></li>
                        <li class="col02"><a href="{% url 'goods:detail' order_goods.goods.id %}">{{ order_goods.goods.name }}<em>{{ order_goods.goods.price }}元/{{ order_goods.goods.uom }}</em></a></li>
                        <li class="col03">{{ order_goods.count }}</li>
                        <li class="col04">{{ order_goods.amount }}</li>
                    </ul>
                    {% endfor %}
                </td>
                <td width="15%">{{ order.total_amount|add:order.transit_amount }}元(含运费)</td>
                <td width="15%" class="status">{{ order.status_name }}</br>支付方式：{{ order.method_name }}</td>
                {% csrf_token %}
                <td width="15%"><a href="#" order_id='{{ order.id }}' order_status='{{ order.order_status }}' status_name='{{ order.status_name }}'pay_method='{{ order.pay_method }}' class="oper_btn">去付款</a></td>
            </tr>
        </tbody>
    </table>
    {% empty %}
    暂无订单
    {% endfor %}

    <div class="pagenation">
        {% if page.has_previous %}
        <a href="{% url 'user:order' page.previous_page_number %}"><上一页</a>
        {% endif %}
        {% for num in pages %}
        <a href="{% url 'user:order' num %}" {% if num == page.number %}class="active"{% endif %}>{{ num }}</a>
        {% endfor %}
        {% if page.has_next %}
        <a href="{% url 'user:order' page.next_page_number %}">下一页></a>
        {% endif %}
    </div>
</div>
{% endblock right %}