Django：如何将提交的数据放回表单中（更新功能）

Question

我一直在尝试在我的表中创建一个“更新功能”，以便用户可以更改我的数据。

所以这是我的 html 表单，我希望我的数据返回到 go ，所以当用户再次按下提交时，它会将该值保存到数据库中：

 <h3>Add a location </h3></br></br>
      <div class="addition">
        <form method="POST" action="" autocomplete="off">
          {% csrf_token %}
            <div class="row">
              <div class="col">
                <input type="text" class="form-control" aria-describedby="emailHelp" placeholder="Location name" name="name" autocomplete="off">
              
              </div>

              <div class="col">    
                <input type="text" class="form-control" aria-describedby="emailHelp" placeholder="Description" name="desc" autocomplete="off">
                
              </div>
              <div class="col">
                <button type="submit" class="btn btn-primary">Submit</button>
                
              </div></br></br>
             
        </form> </br></br>

    <h3>Overview locations</h3>


      <div class="table-responsive">
        <table class="table table-striped table-sm">
          <thead>
            <tr>
              <th>#</th>
              <th>Name</th>
              <th>Description</th>
              <th>Description</th>
            </tr>
          </thead>
          <tbody>
            {% for item in all_locations %}   
                <tr>                    
                <td>{{ forloop.counter }}</td>
                <td>{{ item.name }}</td>
                <td>{{ item.desc }}</td>
                <td><a class="btn btn-sm btn-info" href="{% url 'update_location' item.id %}" >update</a></td>
              </tr>

我的views.py与我的创作 function 和我的更新 function

def location(request):
    all_locations = Location.objects.all()
        if request.method == "POST":
            loc_form = LocationForm(request.POST or None)

            if loc_form.is_valid():
                loc_form.save()

            return render(request, 'location.html', {"all_locations": all_locations})

    else:
        return render(request, 'location.html', {"all_locations": all_locations})
    return render(request, 'location.html', {"all_locations": all_locations})





def updateLocation(request, pk):
    all_locations = Location.objects.all()
    location = Location.objects.get(id=pk)
    loc_form= LocationForm(instance=location)
    name = loc_form.instance.name
    desc = loc_form.instance.desc
    print(name)
    print(desc)
    return render(request, 'location.html', {"all_locations": all_locations, "name": name, "desc": desc})

我的模型.py

class Location(models.Model):
    creation_date = models.DateTimeField(auto_now = True)
    name = models.CharField(max_length=50, default=None)
    desc =  models.CharField(max_length=250, default="", null=True, blank=True)
    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)

和我的urls.py

urlpatterns = [
path('', views.index, name="index"),
path('locations', views.location, name="location"),
path('locations/<str:pk>', views.updateLocation, name="update_location"),
]

所以基本上我坚持将旧数据放回 html 输入。 我也尝试过不同的观点，但我遇到了基本相同的问题。

有什么建议么？ 非常感谢！

Answer 1

我在做其他事情时弄清楚了：

将value="{{ name }}"添加到 html 文件的输入行。 做类似的事情来描述