{oldboy-django][2深入django]分页功能

Posted 2020-10-13 liuzhipenglove

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1 django自带分页

　　1.1 分页模板

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="/static/plugins/bootstrap-3.3.7-dist/css/bootstrap.css">
</head>
<body>
    <p>用户信息</p>
    <table  class="table">
        <thead>
            <tr>
                <th>id</th>
                <th>name</th>
                <th>age</th>
                <th>type</th>
            </tr>
        </thead>
        <tbody>
            {% for row in current_page_obj %}
                <tr>
                    <td>{{ row.id }}</td>
                    <td>{{ row.name }}</td>
                    <td>{{ row.age }}</td>
                    <td>{{ row.ut.title }}</td>
                </tr>
            {% endfor %}
        </tbody>
    </table>
    <div>

        {% if current_page_obj.has_previous %}
            <a href="/fenye/?page={{ current_page_obj.previous_page_number }}">上一页</a>
        {% endif %}
        {% for page in current_page_obj.paginator.page_range %}
            <a href="/fenye/?page={{ page }}">{{ page }}</a>
        {% endfor %}

        {% if current_page_obj.has_next %}
            <a href="/fenye/?page={{ current_page_obj.next_page_number }}">下一页</a>
        {% endif %}



    </div>
</body>
</html>

View Code

　　1.2 分页视图函数

def fenye(request):

    user_list = models.UserInfo.objects.all()
    # 实现分页功能
    from django.core.paginator import Page,Paginator

    current_page_number = request.GET.get(‘page‘)
    paginator = Paginator(user_list, 10)
            # print(paginator.count)            #数据总行数 305
            # print(paginator.num_pages)        #总页数 31
            # print(paginator.object_list)      #当前页的数据 QuerySet[obj,obj]
            # print(paginator.per_page)         #每一页显示多少行数据10
            # print(paginator.page_range)       #页数的范围(1,32)， 是一个range(1,32)，即是一个数组
            # print(paginator.page(1))          #里面的1表示页码数，
    try:
        current_page_obj = paginator.page(current_page_number) # 也是一个QuerySet对象 [obj,obj,..]
    except Exception as e:
        current_page_obj = paginator.page(1)

            # print(current_page_obj.has_next())          #当前页是否有下一页
            # print(current_page_obj.next_page_number())  #当前页的下一页码
            # print(current_page_obj.has_previous())      # 当前页是否有上一页
            # print(current_page_obj.previous_page_number())# 当前页的上一页码
            # print(current_page_obj.object_list)         # 当前页的数据行列表QuerySet[obj,obj,...]
            # print(current_page_obj.number)              # 当前页码
            # print(current_page_obj.paginator)           # 当前页的paginator对象

    return render(request, ‘fenye.html‘, {‘current_page_obj‘: current_page_obj})

View Code

2 自定义分页

　　2.1 模板

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="/static/plugins/bootstrap-3.3.7-dist/css/bootstrap.css">
</head>
<body>
    <p>用户信息</p>
    <table  class="table">
        <thead>
            <tr>
                <th>id</th>
                <th>name</th>
                <th>age</th>
                <th>type</th>
            </tr>
        </thead>
        <tbody>
            {% for row in user_list %}
                <tr>
                    <td>{{ row.id }}</td>
                    <td>{{ row.name }}</td>
                    <td>{{ row.age }}</td>
                    <td>{{ row.ut.title }}</td>
                </tr>
            {% endfor %}
        </tbody>
    </table>

{#    {{ page_info.pager|safe }}#}

    <nav aria-label="Page navigation">
        <ul class="pagination">
            {{ page_info.pager|safe }}
        </ul>
    </nav>

{#    <div>#}
{##}
{#        {% if current_page_obj.has_previous %}#}
{#            <a href="/fenye/?page={{ current_page_obj.previous_page_number }}">上一页</a>#}
{#        {% endif %}#}
{#        {% for page in current_page_obj.paginator.page_range %}#}
{#            <a href="/fenye/?page={{ page }}">{{ page }}</a>#}
{#        {% endfor %}#}
{##}
{#        {% if current_page_obj.has_next %}#}
{#            <a href="/fenye/?page={{ current_page_obj.next_page_number }}">下一页</a>#}
{#        {% endif %}#}
{##}
{##}
{##}
{#    </div>#}
</body>
</html>

View Code

　　2.2 自定义模块

#!/usr/bin/env python
import os
import sys

if __name__ == "__main__":
    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "day4.settings")
    try:
        from django.core.management import execute_from_command_line
    except ImportError:
        # The above import may fail for some other reason. Ensure that the
        # issue is really that Django is missing to avoid masking other
        # exceptions on Python 2.
        try:
            import django
        except ImportError:
            raise ImportError(
                "Couldn‘t import Django. Are you sure it‘s installed and "
                "available on your PYTHONPATH environment variable? Did you "
                "forget to activate a virtual environment?"
            )
        raise
    execute_from_command_line(sys.argv)

View Code

　　2.3 视图

def custom_fenye(request):
    from utils.pagation_define import PageInfo
    current_page_number = request.GET.get(‘page‘)
    all_count = models.UserInfo.objects.all().count()
    page_info = PageInfo(current_page_number, all_count, "/custom_fenye.html/")
    user_list = models.UserInfo.objects.all()[page_info.start():page_info.end()]  # 列表切片操作 a[start:end]   start<= index < end
    return render(request, ‘custom_fenye.html‘, {‘user_list‘: user_list, ‘page_info‘: page_info})

View Code

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