CRM-分页

函数形式

• views.py文件

from django.utils.safestring import mark_safe

def index(request):
    """
    客户信息
    :param request:
    :return:
    """
    cust_obj = models.Customer.objects.all()
    # 获取第几页
    try:
        page_num = int(request.GET.get("page"))
        if page_num <= 0:
            page_num = 1
    except Exception:
        page_num = 1

    # 每页条数
    number_each_page = 2

    # 总数据量
    total_number = cust_obj.count()

    # 总页数
    # divmod(a,b) 返回一个包含商和余数的元组
    page_count,more = divmod(total_number,number_each_page)
    if more:
        page_count += 1

     # 最大显示页码数量
    max_page = 3
    half_page= max_page // 2

    # 控制显示页码数量
    if page_count <= max_page:
        page_start = 1
        page_end = page_count
    else:
        if page_num <= half_page:
            page_start = 1
            page_end = max_page
        elif page_num + half_page >= page_count:
            page_start = page_count - max_page + 1
            page_end = page_count
        else:
            page_start = page_num - half_page
            page_end = page_num + half_page

    # 控制页数不低于1,利用列表生成HTML，在前端展示
    page_list = []
    if page_num == 1:
        page_list.append(f'
上一页
')
    else:
        page_list.append(f'
上一页
')

    for page in range(page_start,page_end + 1):
        page_list.append(f'
{page}
')

    # 控制页数不超过总页数
    if page_num == page_count:
        page_list.append(f'
下一页
')
    else:
        page_list.append(f'
下一页
')

    page_html = "".join(page_list)

    return render(request, 'home/index.html', {"cust_obj": cust_obj[(page_num - 1) * number_each_page:page_num * number_each_page],"page_html":mark_safe(page_html)})

• index.html文件

{% extends 'home/starter.html' %}

{% block header %}
    
客户信息展示
{% endblock %}

{% block content %}
    

        添加
        

            

                

                    

                        
                            姓名
                            QQ
                        
                    
                    

                        

                            
                            
                        Go!
                    
                        
                    
                
            
        
        
            {% for custobj in cust_obj %}
                
            {% endfor %}

            

            

            

                
序号
                
姓名
                
性别
                
出生日期
                
QQ
                
手机号
                
咨询课程
                
客户状态
                
操作
            
            
            

                    
{{ forloop.counter }}
                    
{{ custobj.name }}
                    
{{ custobj.sex }}
                    
{{ custobj.birthday|date:"Y-m-d" }}
                    
{{ custobj.qq }}
                    
{{ custobj.phone }}
                    
{{ custobj.course }}
                    
{{ custobj.status }}
                    

                        
                    
                
        
        

            

                {{ page_html|safe }}
            
        
    


{% endblock %}

{% block script %}
    
{% endblock %}

引用类的方式

• page_component.py文件

from django.utils.safestring import mark_safe

class Paging:

    def __init__(self,page_num,total_number,base_url=None,number_each_page=3,max_page=3):
        """

        :param page_num: 当前所在页码
        :param total_number: 总数据条数
        :param base_url: 传入URL来保证在页码跳转时保存原URL信息
        :param number_each_page: 每页条数
        :param max_page: 最大显示页码数量
        """

        # 获取当前页码
        try:
            self.page_num = int(page_num)
            if self.page_num <= 0:
                self.page_num = 1
        except Exception:
            self.page_num = 1

        # 每页显示数据量
        self.number_each_page = number_each_page

        # 总数据条数
        self.total_number = total_number

        # 总页数
        # divmod(a, b) 返回一个包含商和余数的元组(a // b, a % b)
        self.page_count, more = divmod(self.total_number, self.number_each_page)
        if more:
            self.page_count += 1

        # 最大显示页码数量
        self.max_page = max_page
        self.half_page = max_page // 2

        # 搜索url
        self.base_url = base_url

    # 控制显示页码数量
    @property
    def page_html(self):
        if self.page_count <= self.max_page:
            page_start = 1
            page_end = self.page_count
        else:
            if self.page_num <= self.half_page:
                page_start = 1
                page_end = self.max_page
            elif self.page_num + self.half_page >= self.page_count:
                page_start = self.page_count - self.max_page + 1
                page_end = self.page_count
            else:
                page_start = self.page_num - self.half_page
                page_end = self.page_num + self.half_page

        # 控制页数不低于1
        page_list = []
        if self.page_num == 1:
            page_list.append(f'
首页
')
            page_list.append(f'
上一页
')
        else:
            page_list.append(f'
首页
')
            page_list.append(f'
上一页
')

        for page in range(page_start, page_end + 1):
            if page == self.page_num:
                page_list.append(f'
{page}
')
            else:
                page_list.append(f'
{page}
')

        # 控制页数不超过总页数
        if self.page_num == self.page_count:
            page_list.append(f'
下一页
')
            page_list.append(f'
尾页
')
        else:
            page_list.append(f'
下一页
')
            page_list.append(f'
尾页
')

        page_html = "".join(page_list)

        return mark_safe(page_html)

    @property
    def start(self):
        return (self.page_num - 1) * self.number_each_page

    @property
    def end(self):
        return self.page_num * self.number_each_page

• views.py文件

def index(request):
    """
    客户信息
    :param request:
    :return:
    """
    cust_obj = models.Customer.objects.all()
    # 搜索
    search_field = request.GET.get('search_field')
    kw = request.GET.get('kw')
    base_url = None
    if kw:
        kw = kw.strip()
        q_obj = Q()
        q_obj.children.append((search_field + "__contains", kw))
        cust_obj = cust_obj.filter(q_obj)
        base_url = {}
        base_url["search_field"] = search_field
        base_url["kw"] = kw
        base_url = urlencode(base_url)
        print(base_url)
page = Paging(request.GET.get("page"),cust_obj.count())
return render(request, 'home/index.html', {"cust_obj": cust_obj[page.start:page.end],"page_html":page.page_html})