Django表单帖子未保存

Question

我正在制作一个 Django 应用程序（这是我人生中的第一次）。作为应用程序的一部分，需要实施时间表。将数据（从数据库）加载到时间表中可以正常工作： Timetable view

问题是数据应该是可编辑的。因此用户需要能够更改时间或是/否参数。我在views.py 中创建了一个POST 处理程序，但是当我按下保存时，页面会快速重新加载并且旧值又回来了。我做错了什么？

models.py

class timeTable(models.Model):
    key = models.CharField(max_length=200, unique=True, null=True)
    value = models.CharField(max_length=200, null=True)

    def __str__(self):
        return self.key

views.py

@login_required(login_url='login')
def timetable(request):
    timeTableFormset = modelformset_factory(timeTable, fields='__all__' ,extra=0)
    timetableform = timeTableFormset(queryset=timeTable.objects.all()) 
    if request.method == 'POST':
        form = timeTableFormset(request.POST)
        if form.is_valid():
            form.save()

    return render(request, 'VulnManager/timetable.html', {'timetableform': timetableform})

时间表.html：

<form method="POST">
                            {% csrf_token %}
                            <table id="tablePreview" class="table table-borderless table-hover">
                            <!--Table head-->
                              <thead>
                                <tr>
                                  <th></th>
                                  <th>Monday</th>
                                  <th>Tuesday</th>
                                  <th>Wednesday</th>
                                  <th>Thursday</th>
                                  <th>Friday</th>
                                  <th>Saturday</th>
                                  <th>Sunday</th>
                                </tr>
                              </thead>
                              <!--Table head-->
                              <!--Table body-->
                              <tbody>
                                <tr>
                                    <th scope="row">Scan?</th>
                                    {{ timetableform.management_form }}
                                    {% for timeTableValue in timetableform.forms %}
                                    {% if forloop.counter <= 7 %}
                                    <td><select class="form-control" id="{{ timeTableValue.key.value }}" disabled="true">
                                        <option>{{ timeTableValue.value.value }}</option>
                                        <option>
                                            {% if timeTableValue.value.value == "true" %}
                                            false
                                            {% elif timeTableValue.value.value == "false" %}
                                            true
                                            {% endif %}
                                        </option>
                                    </select></td>
                                    {% if forloop.counter == 7 %}
                                </tr>
                                <tr>
                                    <th scope="row">Time begin</th>
                                    {% endif %}
                                    {% elif forloop.counter >= 8 and forloop.counter <= 14 %}
                                    <td><input type="text" id="{{ timeTableValue.key.value }}" onchange="validateHhMm(this);" value="{{ timeTableValue.value.value }}" readonly /></td>
                                    {% if forloop.counter == 14 %}
                                </tr>
                                <tr>
                                    <th scope="row">Time end</th>
                                    {% endif %}
                                    {% elif forloop.counter >= 15 and forloop.counter <= 21 %}
                                    <td><input type="text" id="{{ timeTableValue.key.value }}" onchange="validateHhMm(this);" value="{{ timeTableValue.value.value }}" readonly /></td>
                                    {% endif %} 
                                    {% endfor %}
                                </tr>
                              </tbody>
                              <!--Table body-->
                            </table>
                            <input type="button" class="btn-primary" id="edit" value="Edit" />
                            <input type="submit" class="btn-primary" id="save" value="Save" />
                        </form>

Answer 1

您的“表单”变量中包含表单集，但您必须单独遍历表单集中的表单：

if form.is_valid():
    for form_line in form:
        form_line.save()

Answer 2

由于缺少更好的术语，您的视图总是呈现“获取”表单。

我认为，如果您保持变量名称相同，它会使事情变得更简单和一致。所以解释一下；

views.py

@login_required(login_url='login')
def timetable(request):
    timeTableFormset = modelformset_factory(timeTable, fields='__all__' ,extra=0)
    timetableform = timeTableFormset(queryset=timeTable.objects.all()) 

    if request.method == 'POST':
        form = timeTableFormset(request.POST) # This form just gets left in this block
        if form.is_valid():
            form.save()

    return render(
        request,
        'VulnManager/timetable.html',
        {'timetableform': timetableform}  # The context includes the fresh new form, with no post data
    )

你应该做的，就是叫它formset，因为它让生活更轻松；

from django.contrib import messages


@login_required(login_url='login')
def timetable(request):
    timeTableFormset = modelformset_factory(timeTable, fields='__all__' ,extra=0)

    formset = timeTableFormset(queryset=timeTable.objects.all()) 

    if request.method == 'POST':
        formset = timeTableFormset(data=request.POST, queryset=timeTable.objects.all())
        if formset.is_valid():
            formset.save()
            # Do something here to reassure the user it saved. Redirect or add a message
            messages.success(request, 'Form saved.')

    return render(
        request,
        'VulnManager/timetable.html',
        {'timetableform': formset}
    )

这里有一篇文章可能会为您提供一些值得一读的内容； https://medium.com/@MicroPyramid/understanding-djangos-model-fromsets-in-detail-and-their-advanced-usage-131dfe66853d