# 分页器
from django.core.paginator import Paginator
def paging(request):users = UserInfo.objects.all().order_by('pk')paginator = Paginator(users, 20)try:currentpage = int(request.GET.get('page', 1))  # 默认显示第一页page = paginator.page(currentpage)except Exception as e:# 出错时显示第一页currentpage = 1page = paginator.page(currentpage)# 传入页码数,拿到的就是当前页对象page = paginator.page(currentpage)# 1 总页数是否大于11,当总页码数大于11if paginator.num_pages > 11:# 1.1 当前页码数是否小于6if currentpage <= 6:# 1.1.1 当当前页码小于6的时候,就生成11个页码数page_range = range(1, 12)# 1.2 当当前页码+5 大于等于总页码数elif currentpage + 5 >= paginator.num_pages:# 1.2.1 往后推11个页码数page_range = range(paginator.num_pages - 10, paginator.num_pages + 1)# 1.3 生成一个左5 右5的区间else:page_range = range(currentpage - 5, currentpage + 6)# 2 总页码数不大于11 ,有多少,显示多少else:page_range = paginator.page_rangereturn render(request, 'page.html', locals())

<table class="table"><thead><tr><th>id</th><th>name</th><th>age</th></tr></thead><br><tbody>
{#                循环的时page不是users#}{% for user in page %}<tr><td>{{ forloop.counter }}</td><td>{{ user.name }}</td><td>{{ user.age }}</td></tr>{% endfor %}</tbody></table><nav aria-label="Page navigation"><ul class="pagination">{#                    上一页判断#}{% if page.has_previous %}<li><a href="/paging/?page={{ page.previous_page_number }}" aria-label="Previous"><span aria-hidden="true">上一页</span></a></li>{% else %}<li class="disabled"><a href="" aria-label="Previous"><span aria-hidden="true">上一页</span></a></li>{% endif %}{# 判断当前页面是否是循环到的页码,如果是,加active#}{% for foo in page_range %}{% if currentpage == foo %}<li class="acitve"><a href="/paging/?page={{ foo }}">{{ foo }}</a></li>{% else %}<li><a href="/paging/?page={{ foo }}">{{ foo }}</a></li>{% endif %}{% endfor %}{#                    下一页判断#}{% if page.has_next %}<li><a href="/paging/?page={{ page.next_page_number }}" aria-label="Next"><span aria-hidden="true">下一页</span></a></li>{% else %}<li class="disabled"><a href="" aria-label="Next"><span aria-hidden="true">下一页</span></a></li>{% endif %}</ul></nav>

<form action=""><p>name <input type="text" name="name"></p><p>pwd <input type="password" name="pwd"></p><p>email <input type="email" name="email"></p><input type="submit"></form><h1>forms的模板渲染之一(推荐)</h1><form action="" method="post" novalidate><p>name: {{ myform.name }}</p><p>pwd: {{ myform.pwd }}</p><p>email: {{ myform.email }}</p><input type="submit"></form><h1>forms的模板渲染之二(推荐!!!!!)</h1><form action="" method="post" novalidate>{% for item in myform %}<p>{{ item.label }}:{{ item }}</p>{% endfor %}<input type="submit"></form><h1>forms的模板渲染之三</h1><form action="" method="post" novalidate>{{ myform.as_p }}<input type="submit"></form>

from django import forms
# 继承Form这个类
class MyForm(forms.Form):# 限制name这个字段最长为8,最短为3name=forms.CharField(min_length=3,max_length=8,label='用户名',required=True,error_messages={'min_length':'至少为3','max_length':'最长为8,您太长了'})pwd=forms.CharField(min_length=3,max_length=8,label='密码',error_messages={'min_length':'至少为3','max_length':'最长为8,您太长了'})email=forms.EmailField(label='邮箱',error_messages={'invalid':'邮箱格式不合法','required':'这个字段必填'})# ajax register
def register(request):if request.method == 'GET':myform=MyForm()return render(request, 'register.html',locals())else:# 生成对象,传参,传字典,要校验数据的字典# myform=MyForm(request.POST)# 自己写要校验的字典,数据多了,多的是不校验的,但是cleaned_data中也没有多出来的数据# dic={'name':'lqz','pwd':'123','email':'22@qq.com','xx':'xxx'}# dic={'name':'lqz','pwd':'123','email':'22'}# dic = {'name': 'abc', 'pwd': '122', 'email': '5555'}name=request.POST.get('name')pwd=request.POST.get('pwd')email=request.POST.get('email')dic = {'name': name, 'pwd': pwd, 'email': email}print(dic)myform = MyForm(dic)# 所有字典都校验通过,它就是True的if myform.is_valid():# 取出校验通过的数据clean_data=myform.changed_dataprint(clean_data)# models.UserInfo.objects.create(**clean_data)else:# 所有的错误信息# 只要是校验通过的值,都在cleaned_data中放着print(myform.changed_data)print(myform.errors.as_data())# 字典类型print(type(myform.errors))print(myform.errors.get('name'))from  django.forms.utils import ErrorDictreturn HttpResponse('OK')