在HTML中渲染django标记无法正常工作

Question

嗨，大家好我想让我的HTML工作，但似乎我没有得到的东西。

我的HTML如下：（链接到网址的网站：team_select）的一个项目链接

{% extends 'base.html' %} 
{% block body %} 
<div class="container"> 
    <div class="jumbotron"> 
    <h2>Welcome to your Project {{ project.name }} Detail page</h2> 
    </div> 

<!-- case 1 = if there is not team created or linked --> 
    {% if project.team_id == None %} 
    <div class="invite-team"> 
     <div class="jumbotron"> 
     <div class="jumbo-text"> 
      <h3>Your project has been created, It is time to link a team or create a new for your project</h3> 
     </div> 
      <div class="jumbo-button"> 
      <a href="{% url 'website:team_select'%}" class="btn btn-default" role="button"><span class="glyphicon glyphicon-link"></span> Link an existing team</a> 
      <a href="{% url 'website:add_team' %}" class="btn btn-success" role="button"><span class="glyphicon glyphicon-plus"></span> Create a new team</a> 
      </div> 
     </div> 

<!-- case 2 = if there is a team created but no team members --> 

{% elif project.team_id and project.team_id.members.count == 0 %} 
<div class="invite-teammembers"> 
    <div class="jumbotron"> 
    <div class="jumbo-text"> 
     <h3>The team {{ project.team_id }} has beed created, we now need to add TeamMembers</h3> 
    </div> 
     <div class="jumbo-button"> 
     <a href="{% url 'registration:team_register3' %}" class="btn btn-success" role="button"><span class="glyphicon glyphicon-plus"></span> Add Team Members</a> 
     </div> 
    </div> 
</div> 

<!-- any other situation --> 
    {% else %} 
    <h1>Youhouu</h1> 

    {% endif %} 
    </div> 
</div> 

{% endblock%} 

我的观点

def TeamSelect(request): 
    #import pdb; pdb.set_trace() 
    if request.method == "POST": 
     select_form = EditSelectTeam(request.user, request.POST) 
     if select_form.is_valid(): 
      data = select_form.cleaned_data['team_choice'] 
      obj2 = Project.objects.filter(project_hr_admin=request.user) 
      obj3 = obj2.latest('id') 
      if obj3.team_id == None: 
       obj3.team_id = data 
       obj3.save() 
       obj4 = obj3.team_id 
       obj5 = obj4.members.all() 

       for i in obj5: 
        current_site = get_current_site(request) 
        message = render_to_string('acc_join_email.html', { 
         'user': i.first_name, 
         'domain':current_site.domain, 
         }) 
        mail_subject = 'You have been invited to SoftScores.com please LogIn to get access to the app' 
        to_email = i.email 
        email = EmailMessage(mail_subject, message, to=[to_email]) 
        email.send() 
       messages.success(request, 'test') 
       return render(request,'project_details.html') 
      else: 
       print('this project has already a team') 
     else: 
      print('Non Valid form') 

    else: 
     select_form = EditSelectTeam(request.user) 
    return render(request,'link_project.html', 
          {'select_form':select_form }) 

我的HTML未呈现，就像它应该。我得到以下错误：

Could not parse the remainder: '()' from 'project.team_id.members.count()' 

的事情是使用shell project.team_id.members.count() == 0是真的 但project.team_id.members.count == 0是False。

我该如何让它工作？

Answer 1

更改为：

{% if not project.team_id and project.team_id.members.count == 0 %} 

和{% else %}而不是{% else project.team_id.members.count() > 0 %}（这是无效）。

请注意，在拨打count后缺少()。

这就是您从HTML模板中调用count函数的方式。其实任何功能，不仅仅是这一个。请阅读behind the scenes，了解点（.）运算符在Django模板内的工作方式。