Question

我有一个Django模型，其中包含一系列描述工作订单的字段。然后我有一个用ModelForm创建的表单，但只使用了少数模型的字段。这是我的表格：

class Service_Call_Form(ModelForm):
class Meta:
    model = Work_Order
    fields = ('dateWOCreated', 'dateWORequired', 'problemDescription',
    'resolutionDescription', 'notesToCrew', 'numHours', 'numWorkers')

我有创建工作订单 HTML模板，该模板显示所有字段，但不“resolutionDescription”。相比之下，有一个工作订单已完成 HTML模板，它只显示 “resolutionDescription”字段（因为，用户需要做的就是解释问题是如何解决的，而不是编辑原始问题是什么）。

现在，我不明白的是，当我点击模板表单中的“保存”按钮完成工作订单时，显示创建工作订单模板的所有字段被清除为空白，问题解决字段仍然存在。此外，我在视图中设置的所有模型字段（因此，用户无法编辑）仍然存在。

为什么会这样？

我的观点：

def create_service_call(request): if request.method == 'POST': form = Service_Call_Form(request.POST) if form.is_valid(): wo = form.save(commit=False) if wo.woID == None: wo.woID = new_wo_id() wo.dateWOCreated = datetime.date.today() wo.systemID = System.objects.get(systemID='2') wo.woType = 'R' wo.isComplete = 'N' wo.save() return HttpResponseRedirect('/work-orders/') else: form = Service_Call_Form() return render_to_response("pages/work_orders/create_service_call.html", {'form': form}, context_instance=RequestContext(request)) def complete_service_call(request, scwoID): if request.method == 'POST': woEdit = Work_Order.objects.get(pk=scwoID) form = Service_Call_Form(request.POST, instance = woEdit) if form.is_valid(): form.save() return HttpResponseRedirect('/work-orders/') else: if scwoID == None: #Really, this should never happen (not have a woID in the url) return HttpResponseRedirect('/work-orders/', context_instance=RequestContext(request)) else: wo = Work_Order.objects.get(pk=scwoID) form = Service_Call_Form(instance=wo) return render_to_response("pages/work_orders/complete_service_call.html", {'form': form}, context_instance=RequestContext(request))

模特：

class Work_Order(models.Model): IS_COMPLETE_CHOICES = ( ('Y', 'Yes'), ('N', 'No'), ) WO_TYPE_CHOICES = ( ('P', 'Plumb'), ('I', 'Install'), ('S', 'Show'), ('R', 'Service'), ('B', 'Blow down'), ('U', 'Start up'), ) woID = models.CharField(max_length = 10, primary_key = True, default = new_wo_id(), verbose_name = 'Work Order ID') woType = models.CharField(max_length = 2, verbose_name = 'WO Type', default='R', choices = WO_TYPE_CHOICES) systemID = models.ForeignKey(System, verbose_name = 'System ID') notesToCrew = models.TextField(blank = True, null = True, verbose_name = 'Notes to Crew') dateWOCreated = models.DateField(blank = True, null = True, default=datetime.date.today(), verbose_name = 'Date Created') dateWORequired = models.DateField(blank = True, null = True, verbose_name = 'Date Required') numDays = models.DecimalField(max_digits = 3, decimal_places = 0, verbose_name = 'Number of Days to Complete', blank = True, null = True) numHours = models.DecimalField(max_digits = 3, decimal_places = 2, verbose_name = 'Number of Hours to Complete', blank = True, null = True) isComplete = models.CharField (max_length = 3, default = 'N', verbose_name = 'Is WO Complete?', choices = IS_COMPLETE_CHOICES) problemDescription = models.TextField(verbose_name = 'Problem Description', blank = True, null = True) resolutionDescription = models.TextField(verbose_name = 'Resolution Description', blank = True, null = True) numWorkers = models.DecimalField(max_digits = 3, decimal_places = 0, verbose_name = 'Number of Workers Required', blank = True, null = True) def __unicode__(self): return u'%s - %s' % (self.woID, self.systemID.systemAddress) class Meta: ordering = ['woID']

Answer 1

您应该有两种形式，因为您有两种完全不同类型的数据被输入。第一个可以是ModelForm（因为它将一堆字段保存到模型中）：

class Service_Call_Form(ModelForm):
    class Meta:
        model = Work_Order
        fields = ('dateWOCreated', 'dateWORequired', 'problemDescription',
                  'notesToCrew', 'numHours', 'numWorkers')

和一个只包含ResolutionDescription的文章，我将其作为常规表单保留（因为它只更新模型中的一个字段）。您可能还希望模型ID是隐藏字段，如果它不存在于URL中，或者使其成为request.POST，否则。

class Resolution_Description_Form(forms.Form):
     resolution_description = forms.TextField(max_length=100)

如果模板来自Service_Call_Form，您的视图保存正确;如果你有resolution_description的内容，你应该只在以下函数中更新该字段：

def complete_work_order(request, scwoID):
    if request.method == 'POST':
        woEdit = Work_Order.objects.get(pk=scwoID)
        form = Resolution_Description_Form(request.POST)
        if form.is_valid():
            woEdit.resolution_description = form.cleaned_data.get('resolution_description')
            woEdit.save()
            return HttpResponseRedirect('/work-orders/')
     ...

编辑：如果你愿意，你也可以只有两个ModelForm。例如，

class Resolution_Description_Form(ModelForm):
    class Meta:
        model = Work_Order
        fields = ('resolutionDescription', )

只需在相应的模板中使用相应的ModelForm，然后保存为您之前保存的内容。

Django form.save（）清除模型对象数据

1 个答案: