python笔记20190103

form表单
form表单的主要功能

Form表单验证（用户请求验证+生成HTML标签）

首先创建form类

class RegisterForm(Form):
    name=fields.CharField(error_messages={'required':'用户名不能为空'},widget=widgets.TextInput(attrs={'class':'c1'}))
    pwd=fields.CharField(error_messages={'required':'密码不能为空'},widget=widgets.PasswordInput({'class':'c1'}))
    pwd_confirm=fields.CharField(error_messages={'required':'密码2不能为空'},widget=widgets.PasswordInput(attrs={'class':'c1'}))

    def clean(self):
        try:
            pwd=self.cleaned_data['password']
            pwd_confirm=self.cleaned_data['pwd_confirm']
            if pwd == pwd_confirm:
                return self.cleaned_data
            else:
                from django.core.exceptions import ValidationError
                self.add_error('pwd_confirm',ValidationError('密码输入不一致'))
                return self.cleaned_data
        except KeyError as e:
            return self.cleaned_data
            ```

编辑页面
def register(request):
if request.method == ‘GET’:
form=RegisterForm()
return render(request,‘register.html’,{‘form’:form})
else:
form=RegisterForm(request.POST)
if form.is_valid():
models.hostlist.objects.create(**form,clean_data)
print(form.cleaned_data[‘pwd’])
print(form.cleaned_data[‘pwd_confirm’])
else:
print(form.errors)
return render(request,‘register.html’,{‘form’:form})