[oldboy-django][2深入django]分页功能
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>
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})
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 }}#} {#利用了bootstrap的分页组件#} <nav aria-label="Page navigation"> <ul class="pagination"> {{ page_info.pager|safe }} </ul> </nav> </body> </html>
2.2 自定义模块
class PageInfo(object): def __init__(self, current_page_num, all_count, base_url, per_page=10, show_page=11): try: self.current_page_num = int(current_page_num) except Exception as e: self.current_page_num = 1 self.per_page = per_page a,b = divmod(all_count, per_page) if b: a = a + 11 self.all_page = a self.show_page = show_page self.base_url = base_url def start(self): return (self.current_page_num - 1) * self.per_page def end(self): return self.current_page_num * self.per_page def pager(self): page_list = [] # 如果总的页码数小于11 if self.show_page >= self.all_page: begin = 1 stop = self.all_page # 总页码数大于11 else: half,_ = divmod(self.show_page,2) if self.current_page_num <= half: begin = 1 stop = self.show_page else: temp = self.all_page - half if self.current_page_num >= temp: begin = self.all_page - self.show_page + 1 stop = self.all_page else: begin = self.current_page_num - half stop = self.current_page_num + half prev_page = '' if self.current_page_num == 1: prev_page = '<li class="disabled"><a aria-label="Previous"><span aria-hidden="true">«</span></a></li>' else: prev_page = '<li><a href="%s?page=%s" aria-label="Previous"><span aria-hidden="true">«</span></a></li>'% (self.base_url, self.current_page_num -1) page_list.append(prev_page) for i in range(begin, stop + 1): if i == self.current_page_num: temp = '<li class="active"><a href="%s?page=%s">%s</a></li>' % (self.base_url, i,i) else: temp = '<li><a href="%s?page=%s">%s</a></li>' % (self.base_url,i,i) page_list.append(temp) next_page= '' if self.current_page_num == self.all_page: next_page = '<li class="disabled"><a aria-label="Next"><span aria-hidden="true">»</span></a></li>' else: next_page = '<li><a href="%s?page=%s" aria-label="Next"><span aria-hidden="true">»</span></a></li>' % (self.base_url,self.current_page_num +1) page_list.append(next_page) return ''.join(page_list)
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})
