python 分页
1、创建数据库信息
class UserList(models.Model): username = models.CharField(max_length=32) age = models.IntegerField()
2、创建URL
from app01 import views urlpatterns = [ url(r'^admin/', admin.site.urls), url(r'^user_list/', views.user_list), ]
3、定义一个Pager类，处理页数换算
class Pager(object): def __init__(self, current_page): self.current_page = int(current_page) @property def start(self): return (self.current_page - 1) * 10 @property def end(self): return self.current_page * 10 def page_str(self, all_item, base_url): all_page, div = divmod(all_item, 10) if div > 0: all_page += 1 pager_list = [] if all_page <= 11: start = 1 end = all_page else: if self.current_page <= 6: start = 1 end = 12 else: start = self.current_page - 5 end = self.current_page + 6 if self.current_page + 6 > all_page: start = all_page - 11 end = all_page + 1 for i in range(start, end): if i == self.current_page: temp = '<a style="colo:red;font-size:26px;" href="%s%d">%d</a>' % (base_url, i, i,) else: temp = '<a href="%s%d">%d</a>' % (base_url, i, i) pager_list.append(temp) # pre_next if self.current_page > 1: pre_page = '<a href="%s%d">pre_next</a>' % (base_url, self.current_page - 1) else: pre_page = '<a href="javascript:void(0);">pre_next</a>' # next if self.current_page >= all_page: next_page = '<a href="javascript:void(0);">next</a>' else: next_page = '<a href="%s%d">next</a>' % (base_url, self.current_page + 1) pager_list.insert(0, pre_page) pager_list.append(next_page) return mark_safe("".join(pager_list))
4、创建视图 ，并导入上面创建的Pager类
def user_list(request): current_page=request.GET.get('page',1) page_obj = page.Pager(current_page) result = models.UserList.objects.all()[page_obj.start:page_obj.end] all_item = models.UserList.objects.all().count() pager_str = page_obj.page_str(all_item, "/user_list/?page=") return render(request, 'user_list.html', {'result': result, 'pager_str': pager_str})
5、创建前端user_list.html调用后台信息。
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title></title> <style> a{ padding: 5px; } </style> </head> <body> <table> {% for line in result %} <tr> <td>` line`.`username `</td> <td>` line`.`age `</td> </tr> {% endfor %} </table> <div> {{ pager_str|safe }} </div> </body> </html>
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