使用关键字参数“{'pk': ''}' 的“edit_team”反向。尝试了 1 种模式：['club_home/edit_team/(?P<pk>[0-9]+)/$']

Question

尝试创建页面以使用序列化程序更新我的模型时收到上述错误。无法在 edit_team 视图中使用 pk。有什么想法我哪里出错了吗？删除按钮与 pk 工作正常，不知道为什么更新不是。

urls.py

path('teams/', views.TeamInfo.as_view(), name='teams'),
path('delete_team/<int:pk>/', views.delete_team, name='delete_team'),
path('edit_team/<int:pk>/', views.edit_team, name='edit_team'),

teams.html

<div class="team">
<h3>Team Details</h3>
<p>
    {% csrf_token %}
    {% for info in teams %}
<li>{{ info.club_id }}</li>
<li>{{ info.team_name }}</li>
<li>{{ info.manager_name }}</li>
<form action="{% url 'clubs:delete_team' info.pk %}">
<input type="submit" value="Delete">
</form>
<form action="{% url 'clubs:edit_team' info.pk %}">
<input type="submit" value="Edit">   

edit_team.html

{% extends 'club_main_page.html' %}
{% load rest_framework %}
{% load staticfiles %}
{% block body_block %}

<div class="editteam">
  <h3>Edit Team</h3>
<form action="{% url 'clubs:edit_team' pk=instance.pk %}" method="POST">
      {% csrf_token %}
     {% render_form serializer %}
<input type="submit" name="" value="Update">
</form>

</div>
{% endblock %}

views.py

def delete_team(request, pk):
    team = Team.objects.filter(pk=pk)
    team.delete()
    return redirect('clubs:teams')


def edit_team(request, pk):
    instance = Team.objects.filter(pk=pk)
    if request.method == 'POST':
        serializer = TeamSerializer(request.POST, instance=instance)
        if serializer.is_valid():
            serializer.save()
            return redirect('/')
        else:
            return redirect('/')
    else:
        serializer = TeamSerializer(instance=instance)
        return render(request, 'edit_team.html', {'serializer': serializer})

引用：edit_pitch 中的 \clubkit\clubs\views.py return render(request, 'edit_pitch.html', {'serializer': serializer})

Answer 1

在您的模板中编写：

&lt;form action="{% url 'clubs:edit_team' pk=<b>instance.pk</b> %}" method="POST"&gt;

但是没有 instance 变量，你传递给渲染进程，所以你也应该添加这个，所以：

def edit_team(request, pk):
    instance = Team.objects.filter(pk=pk)
    if request.method == 'POST':
        serializer = TeamSerializer(request.POST, instance=instance)
        if serializer.is_valid():
            serializer.save()
            return redirect('/')
        else:
            return redirect('/')
    else:
        serializer = TeamSerializer(instance=instance)
        return render(
            request,
            'edit_team.html',
            {'serializer': serializer, 'instance': instance})

但我不确定，如果重定向到 / 是个好主意，如果 serializer 是 not 有效，肯定不是。在这种情况下，人们通常希望再次呈现页面，但出现错误。因此，make use of forms [Django-doc] 可能也是一个更好的主意。

Answer 2

您没有将 PK 传递给模板，因此它不能用于在那里生成 URL。更改视图的最后一行：

return render(request, 'edit_team.html', {''pk': pk, serializer': serializer})

Answer 3

本可以使用序列化程序来解决这个问题。但只是在此处使用表单解决方案，以防万一有人需要它：

def edit_team(request, pk):
instance = Team.objects.filter(pk=pk).first()
if request.method == 'POST':
    form = TeamForm(request.POST, instance=instance)
    if form.is_valid():
        form.save()
        return redirect('clubs:teams')
    else:
        return redirect('clubs:teams')
else:
    form = TeamForm(instance=instance)
    return render(request, 'edit_team.html', {'form': form,
                                              'instance': instance})

然后在模板中：

{% extends 'club_main_page.html' %}

{% block head %}
<title>Edit Pitch</title>
{% endblock %}

{% block body_block %}

<div class="container">
<form method="post">
    {% csrf_token %}
    {{ form.as_p}}
    <button type="submit">Submit</button>
</form>

</div>

{% endblock %}