Question

人。

我想检查我的django模板，如果 request.user 存在于我的表 LeagueMember 中的某行列用户中。我发现的方式不起作用。

views.py

@login_required(login_url='login/')
def search_leagues(request):
if request.method == 'POST':
    return redirect('join_league')

leagues = League.objects.all()
return render(request, 'search_leagues.html', { 'allleagues': leagues })

model.py

class League(models.Model):
    league_owner = models.ForeignKey('auth.User')
    league_name = models.CharField(max_length=30)
    creation_date = models.DateTimeField()

    def is_member(self):
        member = LeagueMember.objects.get(league=self)  
        if member:
            return True
        else:
            return False

class LeagueMember(models.Model):
    league = models.ForeignKey('League', related_name='leaguemember_league')
    user = models.ForeignKey('auth.User')

search_leagues.html

{% for league in allleagues %}
<tr>
   <td class="center">{{ league.league_name }}</td>
   <td class="center">{{ league.leaguemember_league.count}}/{{ league.leaguesettings_league.league_number_teams }}</td>
   <td class="center">{{ league.leaguesettings_league.league_eligibility }}</td>
   <td class="center">{{ league.leaguesettings_league.league_lifetime }}</td>
   {% if request.user in league.leaguemember_league.user %}
   DO SOMETHING!!!
   {% else %}
   {% if league.leaguemember_league.count < league.leaguesettings_league.league_number_teams %}
   {% if league.leaguesettings_league.league_eligibility == "Private" %}
   <form method="post" action="{% url 'joinleague' pk=league.id %}">
      <td class="center"><a href="{% url 'joinleague' pk=league.id %}" class="btn btn-mini btn-warning">Soliticar</a></td>
   </form>
   {% elif league.leaguesettings_league.league_eligibility == "Public" %}
   <form method="post" action="{% url 'joinleague' pk=league.id %}">
      <td class="center"><a href="{% url 'joinleague' pk=league.id %}" class="btn btn-mini btn-info">Entrar</a></td>
   </form>
   {% endif %}
   {% endif %}
   {% endif %}
</tr>
{% endfor %}

此错误在此行中：

{% if request.user in league.leaguemember_league.user %}

始终进入ELSE区块

谢谢大家

Answer 1

DataFrame不会为您提供league.leaguemember_league个对象，而是RelatedManager个对象（因此您无法在其中找到LeagueMember属性，因此您的模板逻辑将无效）。

您要做的是在您的关系中深入两个级别（user - ＆gt; League - ＆gt; LeagueMember）。您无法轻松地在模板中执行此类逻辑，而可能需要在视图代码中执行此操作。例如：

User

然后，您需要修改所有模板逻辑以使用此新结构：

league_data = []
for league in League.objects.all():
    league_data.append({
        'league': league,
        'users': User.objects.filter(leaguemember__league=league) # This gives you all the users that are related to this league
    })

 return render(request, 'search_leagues.html', { 'allleagues': league_data})

然后在{% for league_data in allleagues %} # Replace league with league_data.league in all the template logic below this区块中，您可以执行以下操作：

if

请注意，如果您拥有大量用户/联盟，此查询可能效率不高 - 在这种情况下，您可能需要重新考虑您的模型设计。

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1 个答案: