在HTML中渲染Django标签不起作用

Question

嗨，我正在尝试使我的html起作用，但看来我没有得到东西。

我的html如下：

    {% 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%}

我对链接项目的看法：（链接到URL网站：Team_Select）

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并不像应有的那样渲染。我收到以下错误：

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

事物是使用shell project.team_id.members.count() == 0是正确的但是project.team_id.members.count == 0是False。

我该如何使它起作用？

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 %}（无效）。

请注意，count呼叫后缺少()。

这就是您从HTML模板调用count函数的方式。实际上，任何功能，不仅是这个功能。在behind the scenes中读取DOT（.）操作员在Django模板中的工作方式。