django中具有Groups模型，ManyToMany字段的错误循环

Question

我想在for循环中显示1个按钮，但是我得到的按钮数量与创建组的数量一样多。 所以..当我创建3个组（其中我是成员之一）时，我在每个组下都有3个按钮。 问题是代码中的第一个循环，但是我不知道如何解决这个问题。

问题在循环中：

{% for z in mem %}

当我创建任何会员资格时，就像：

m = Membership.objects.create(person="damian", group="name_group", leader=True)  / or False

谢谢你的帮助！

groups.html：

{% for g in gr %}
           <div class="jumbotron">
            <div class="jumbo2">
              <form method="POST" class="post-form"> {% csrf_token %}
                <p id="name"><b>Group's name:</b> {{g.name}}</p><br>

                {% for member in g.members.all %}

                  <p><b>Member:</b> {{member.name}} </p>

                {% endfor %}



                <br>
                <span class="desc2">Group's description:</span>
                <p id="desc">{{g.description}}</p><br>
                {% for z in mem %}
                  {% if z.leader == False %}
                    <button style="float: right" type="submit" name = "leave"  value = "{{g.name}}" class="save btn btn-default">Leave</button>
                  {% elif z.leader == True %}
                    <button style="float: right" type="submit" name = "delete"  value = "{{g.name}}" class="save btn btn-default">Delete</button>
                  {% endif %}
                {% endfor %}


              </form>
              <br><br>
              <p>
              {% if messages %}
                {% for message in messages %}
                  <p>{{ message }}</p>
                {% endfor %}
              {% endif %}
              </p>

            </div>
          </div>



          {% endfor %}

views.py：

    cvs = Cv.objects.all()
    cv = Cv.objects.filter(author = request.user)
    per = Person.objects.all()
    gr = Group.objects.filter(members__name=request.user)
    perr = Person.objects.filter(name=request.user)

    mem = Membership.objects.filter(group = gr, person = perr)
    form = GroupForm()


    context = {
        'gr': gr,
        'per':per,
        'mem':mem,
        'form': form,
        'cvs':cvs,
        'cv':cv,
    }

    return render(request, 'groups.html', context)

models.py：

class Person(models.Model):
    name = models.CharField(max_length=128)

    def __str__(self):              # __unicode__ on Python 2
        return self.name


class Group(models.Model):
    name = models.CharField(max_length=128)
    members = models.ManyToManyField(Person, through='Membership')
    description = models.TextField(max_length=350)

    def __str__(self):              # __unicode__ on Python 2
        return self.name


class Membership(models.Model):
    person = models.ForeignKey(Person)
    leader = models.BooleanField(default=False)
    group = models.ForeignKey(Group)

Answer 1

好的，我替换了我的组，只使用了成员对象。 这是我的工作代码：

          {% for z in mem %}
           <div class="jumbotron">
            <div class="jumbo2">
              <form method="POST" class="post-form"> {% csrf_token %}
                <p id="name"><b>Group's name:</b> {{z.group}}</p><br>

                {% for member in z.group.members.all %}

                  <p><b>Member:</b> {{member.name}} </p>

                {% endfor %}


                <br>
                <span class="desc2">Group's description:</span>
                <p id="desc">{{z.group.description}}</p><br>


                      {% if z.leader == False %}
                        <button style="float: right" type="submit" name = "leave"  value = "{{z.group}}" class="save btn btn-default">Leave</button>
                      {% elif z.leader == True %}
                        <button style="float: right" type="submit" name = "delete"  value = "{{z.group}}" class="save btn btn-default">Delete</button>
                      {% endif %}

              </form>
              <br><br>
              <p>
              </p>

            </div>
          </div> 

          {% endfor %}