Question

我怎样才能设置我的会员资格，而不是全部用于for-loop？

template.html：

         {% for g in gr %}

           <div class="jumbotron">
            <div class="jumbo2">
              <form method="POST" class="post-form"> {% csrf_token %}
                <p id="name"><b>Groups name:</b> {{g.name}}</p><br>

                {% for membership in g.membership_set.all %}

                      <p><b>Member:</b> {{ membership.person }} - {{ membership.role }}</p>                            

                {% endfor %}






                <br>
                <span class="desc2">Groups description:</span>
                <p id="desc">{{g.description}}</p><br>



                {% for membership in g.membership_set.all %}

                      {% if membership.leader == False %}
                        <button style="float: right" type="submit" name = "leave"  value = "{{g.name}}" class="save btn btn-default">Leave</button>
                      {% elif membership.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></p>



                </div>
                </div>

            {% endfor %}

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)
    role = models.CharField(max_length=50)

我的按钮很多，因为我在某些群组中拥有用户。我想只显示1个按钮，我需要精确的ForLoop只为我在这个组中的会员资格。我怎么能这样做？

Answer 1

我认为只使用标准模板代码就可以做到这一点。您需要通过过滤会员资格来获取Membership对象：

membership = my_person.membership_set.get(group=my_group)

要在模板中执行此操作，您必须编写适用于my_person对象的own template filter并将my_group对象作为参数。然后，过滤器可以应用上述查询并返回成员资格对象。

{% with membership=my_person|get_group_membership:g %}
    {% if membership.leader == False %}
        <button style="float: right" type="submit" name = "leave"  value = "{{g.name}}" class="save btn btn-default">Leave</button>
    {% elif membership.leader == True %}
        <button style="float: right" type="submit" name = "delete"  value = "{{g.name}}" class="save btn btn-default">Delete</button>
    {% endif %}
{% endwith %}

如何使用Django中的Membership访问多对多属性

1 个答案: