我想在输入标签的模板中设置 minlength＆maxlength

Question

我在 index.html 中写了

    <div class="heading col-lg-6 col-md-12">
                    
            <h2>New account registration</h2>
        
            <form class="form-horizontal" action="regist_save/" method="POST">
                    
              <div class="form-group-lg">
                    
                <label for="id_username">username</label>
                
                    {{ regist_form.username }}
                    
              </div>
                    
                    
              <div class="form-group-lg">
                    
                <label for="id_email">email</label>
                
                     {{ regist_form.email }}
              </div>   
              <div class="form-group-lg">
                    
                <label for="id_password">password</label>
                    
                 {{ regist_form.password1 }}
                    
              </div>
                    
                    
              <div class="form-group-lg">
                <label for="id_password">password（conformation）</label>
                    
                 {{ regist_form.password2 }}
                 <p class="help-block">{{ regist_form.password2.help_text }}</p>
                    
              </div>
                    
                    
              <div class="form-group-lg">
                <div class="col-xs-offset-2">
                <button type="submit" class="btn btn-primary btn-lg">SUBMIT</button>
                    
                <input name="next" type="hidden"/>
                    
                </div>
              </div>
              {% csrf_token %}
                    
            </form>
                    
    </div>

我想在用户名和密码输入标签的模板中设置最小长度和最大长度。如果我用html stye写，那就是

<form class="form-horizontal" action="regist_save/" method="POST">
                    
              <div class="form-group-lg">
                    
                <label for="id_username">username</label>
                
     <input id="id_username" name="username" type="text" value="" minlength="5" maxlength="12" placeholder="username" class="form-control">               
              </div>
                    
                    
              <div class="form-group-lg">
                    
                <label for="id_email">email</label>
                
                     {{ regist_form.email }}
              </div>   
              <div class="form-group-lg">
                    
                <label for="id_password">password</label>
                    
                 <input id="id_password1" name="password1" type="password1" value="" minlength="8" maxlength="12" placeholder="password1" class="form-control">  
              </div>
                    
                    
              <div class="form-group-lg">
                <label for="id_password">password（conformation）</label>
                    
                 <input id="id_password2" name="password2" type="password2" value="" minlength="8" maxlength="12" placeholder="password2" class="form-control">  
                 <p class="help-block">{{ regist_form.password2.help_text }}</p>
                    
              </div>
                    
                    
              <div class="form-group-lg">
                <div class="col-xs-offset-2">
                <button type="submit" class="btn btn-primary btn-lg">SUBMIT</button>
                    
                <input name="next" type="hidden"/>
                    
                </div>
              </div>
              {% csrf_token %}
                    
            </form>
                    

在forms.py中

class RegisterForm(UserCreationForm):
    class Meta:
        model = User
        fields = ('username', 'email','password1','password1',)
    def __init__(self, *args, **kwargs):
        super(RegisterForm, self).__init__(*args, **kwargs)
        self.fields['username'].widget.attrs['class'] = 'form-control'
        self.fields['email'].widget.attrs['class'] = 'form-control'
        self.fields['password1'].widget.attrs['class'] = 'form-control'
        self.fields['password2'].widget.attrs['class'] = 'form-control'

在views.py中

@require_POST
def regist_save(request):
    regist_form = RegisterForm(request.POST)
    if regist_form.is_valid():
        user = regist_form.save(commit=False)
        password = regist_form.cleaned_data.get('password')
        user.set_password(password)
        user.save()
        login(request, user)
        context = {
            'user': request.user,
        }
        return redirect('detail')

    context = {
        'regist_form': regist_form,
    }
    return render(request, 'registration/regist.html', context)

我想设置用户名 minlength="5" &maxlength="12" 和密码 minlength="8" & maxlength="12"。我想把它写在模板中，虽然我在谷歌中搜索过但我找不到它.我想我可以通过模板来做，但我误解了吗？我不能在模板里做吗？

Answer 1

您可以通过使用这些属性来设置 ma​​xlength 和 minlength 以及所需的限制，验证将相应地进行

Working example on W3schools