Question

我创建了一个“香草”表单，提交后应根据文本输入检查是否存在某项。如果确实如此，则会在该项目的“ item_selected”字段上增加一个计数器，然后继续使用该项目和其余提交字段创建请购记录。其他项目不存在，它将创建项目记录以及创建请购单记录。提交我的表格时，没有任何反应。我确保url路由正确并且正在提交到正确的视图。

我不相信我可以使用ModelForm，因为ModelForms绑定到一个模型，在这里我试图更新多个表。预先谢谢你！

Views.py

def create_req(request):
    if request == 'POST':
        req_form = ReqForm(request.POST)
        if req_form.is_valid():
            try:
                item_record = ItemMaster.objects.get(item=req_form.cleaned_data['item'])
                item_record.save(commit=False)
                item_record.item_selected = F('item_selected') + 1
                item_record.save()

                requisition_record = Requisition.objects.create(item=req_form.cleaned_data['item'], 
                                                                signature=req_form.cleaned_data['signiture'])
                requisition_record.save(commit=False)
                requisition_record.username = CustomUser.objects.get(username=request.user)
                requisition_record.save()
            except ItemMaster.DoesNotExit:
                item_record = ItemMaster.objects.create(item=req_form.cleaned_data['item'], 
                                                        description=req_form.cleaned_data['description'], 
                                                        price=req_form.cleaned_data['price'], 
                                                        item_selected=1)
                item_record.save()

                requisition_record = Requisition.objects.create(item=req_form.cleaned_data['item'], signature=req_form.cleaned_data['signiture'])
                requisition_record.save(commit=False)
                requisition_record.username = request.user
                requisition_record.save()
            return HttpResponseRedirect(reverse('home') )
    else:
        req_form = ReqForm()
    return render(request, 'req/create_req.html', {'req_form':req_form})

forms.py

class ReqForm(forms.Form):
    item = forms.CharField(min_length=3, max_length=20)
    description = forms.CharField(min_length=0, max_length=50, empty_value='' )
    price = forms.DecimalField(max_digits=19, decimal_places=2)
    signiture = forms.CharField(min_length=0, max_length=10, empty_value='')

create_req.html

<p>
    <a href="{% url 'home' %}">Home</a> &nbsp
    <a href="{% url 'requisition:create_req' %}">Reset Form</a>
</p>

<h1>Example Form</h1>
{% if error_message %}
<p>
    <strong>{{error_message}}</strong>
</p>
{% endif %}

<body>  
    <form method="post" action="{% url 'requisition:create_req' %}" >
      {% csrf_token %}
      {{ req_form }}
      <input type="submit" value="Submit">
    </form>
</body>

Urls.py

app_name = 'requisition'
urlpatterns = [
    path('', views.create_req, name='create_req'),
]

Answer 1

更改

if request == "POST":
    ...

到

if request.method == "POST":
    ...

Django-表单数据不会保存到数据库

1 个答案: