Question

我有一个很大的目标 - 用户旅行报告。我已经为用户提供了界面，可以逐一编辑该报告中的某些字段。由于用户可以一次编辑一个字段，因此我创建了根据用户想要编辑的字段创建模型的方法。

它的工作原理如下：

def createFieldEditorForm(client, field, report_id, request = None):
    from django.shortcuts import get_object_or_404
    report_instance = get_object_or_404(DriveReport, id = report_id)

    class FieldEditorForm(forms.ModelForm):

        class Meta:
            model = DriveReport
            fields = ['id', ]

        id = forms.IntegerField(label = _(u"ride_id"), widget=forms.HiddenInput())

        def __init__(self, *args, **kwargs):
            super(FieldEditorForm, self).__init__(*args, **kwargs)

            self.build_fields()

        def build_fields(self):
            if field == 'driver_id':
                driver_query = Driver.objects.filter(client = client)
                choices = [('', u'------'),]
                for driver in driver_query:
                    choices.append((driver.id, driver.name))
                self.fields[field] = forms.IntegerField(
                    label = _(u"Drivers"), 
                    widget = forms.Select(
                        choices = choices,
                        attrs = {'data-name':'driver_id'} ),
                    required = False)
            elif field == 'project_id':
                area_query = Area.objects.filter(client = client)
                choices = [('', u'------'),]
                for area in area_query:
                    choices.append((area.id, area.name))
                self.fields[field] = forms.IntegerField(
                    label = _(u"Projects"), 
                    widget = froms.Select(
                        choices = choices,
                        attrs = {'data-name':'project_id'} ),
                    required = False)
            elif field == 'trip_type':
                self.fields[field] = forms.CharField(
                    label = _(u"Projects"), 
                    widget = forms.Select(
                        choices = [(key, value) for key, value in TRIP_TYPE_CHOICES.iteritems()],
                        attrs = {'data-name':'trip_type'} ),
                    required = False)
            else:
                self.fields[field] = forms.CharField(required = False, widget = forms.TextInput(attrs = {'data-name':field} ))

if request is None:
    return FieldEditorForm(instance = report_instance)
else:
    return FieldEditorForm(request, instance = report_instance)

在视野中

就是这样：

if request.method == 'POST':
    form = createFieldEditorForm(activeaccount, field_id, ride_id, request.POST)
    if form.is_valid():
        form.save()
        messages.success(request, _("New field value successfully added/updated"))
    else:
        messages.error(request, _("Value was not saved"))

    return feedback_to_json(request, form)

结果是 - 我在浏览器中获得成功消息，但该字段未更新。

我尝试覆盖form.save（）方法并检查self.cleaned_data是否包含[field] - 它确实如此。就在那里。即使我在保存之前打印出表单并且在保存之后我可以看到，数据已经到达后端并且它的一切都很整洁..但该死的值只是没有保存/更新到数据库中

Answer 1

ModelForm的保存功能仅适用于fields属性中的实际字段。由于您是动态添加字段，因此您需要手动保存这些字段（使用commit = False保存表单，然后将数据添加到已返回的未保存对象中）。

Django以某种方式丢失了表单中的更新值

1 个答案: