Django使用一个模板创建和编辑页面

Question

我遇到了一个问题，每当我在编辑页面上保存时，它都不会转到url，而是要求我输入要隐藏的字段。

model.py

class Building(models.Model): 
# Name of the project 
name = models.CharField(max_length=25, verbose_name='Project ID') 
# The address of the building 
address = models.CharField(max_length=100, verbose_name='Address') 
# The client name for this project 
client = models.CharField(max_length=50) 
# The contact number for the project 
contact = models.CharField(max_length=50) 

forms.py

# The form to edit building details 
class UpdateBuildingForm(forms.ModelForm): 
    name = forms.CharField(label='Name', max_length=25, widget=forms.TextInput) 
    client = forms.CharField(label='Client', max_length=50, widget=forms.TextInput) 
    contact = forms.CharField(label='Contact', max_length=50, widget=forms.TextInput) 
    address = forms.CharField(label='Address', max_length=100, widget=forms.TextInput) 

    class Meta: 
    model = Building 

urls.py

urlpatterns = patterns('', 
        # e.g: /projectmonitor/ 
        url(r'^$', views.BuildingSummary.as_view(), name='buildings'), 
        # url to add new building 
        url(r'building/new/$', views.BuildingCreate.as_view(), name='new_building'), 
        # e.g: /projectmonitor/5 
        url(r'^(?P<pk>\d+)/$', views.BuildingUpdate.as_view(), name='detail'), 

views.py：

# The building create view 
class BuildingCreate(generic.CreateView): 
    model = Building 
    form_class = UpdateBuildingForm 
    template_name = "buildings/details.html" 

    def form_valid(self, form): 
     self.object = form.save(commit=False) 
     self.object.save() 
     return HttpResponseRedirect(reverse('projectmonitor:buildings')) 

# The building update view 
class BuildingUpdate(generic.UpdateView): 
    model = Building 
    form_class = UpdateBuildingForm 
    template_name = "buildings/details.html" 

    def form_valid(self, form): 
     """ 
     Update the building details after editing 
     :param form: The building form 
     :return: Redirect to the building summary page 
     """ 
     self.object = form.save(commit=False) 
     self.object.save() 
     return HttpResponseRedirect(reverse('projectmonitor:buildings')) 

和模板

<form action="{{ action }}" method="post"> 
     {% csrf_token %} 
     {% for error in form.non_field_errors %} 
      {{ error }} 
     {% endfor %} 
     <div class="fieldWrapper"> 
      {% if not form.name.value %} 
       <p><label class="standard-label" for="id_name">Name:</label> 
       {{ form.name|add_field_style:'width: 65%;margin-left: 10px;float:left;' }}</p> 
      {% endif %} 
      <p><label class="standard-label" for="id_address">Address:</label> 
       {{ form.address|add_field_style:'width: 65%;margin-left: 10px;float:left;' }}</p> 

      <p><label class="standard-label" for="id_client">Client:</label> 
       {{ form.client|add_field_style:'width: 65%;margin-left: 10px;float:left;' }}</p> 

      <p><label class="standard-label" for="id_contact">Contact:</label> 
       {{ form.contact|add_field_style:'width: 65%;margin-left: 10px;float:left;' }}</p> 
     </div> 
     <input type="submit" value="Save"/> 
    </form> 

两个编辑和创建共享相同的模板。名称字段是每个建筑物的唯一键，一旦用户创建建筑物，我不希望他们改变它，所以我尝试将其隐藏在编辑视图上。但是当我更改其他字段并尝试保存它时，它总是弹出一个空的名称字段并要求我输入名称。有没有人有什么建议？在此先感谢

Answer 1

您可以在名称字段上设置readonly属性。

尝试添加以下__init__方法在UpdateBuildingForm类：

def __init__(self, *args, **kwargs): 
    super(UpdateBuildingForm, self).__init__(*args, **kwargs) 
    instance = getattr(self, 'instance', None) 
    if instance and instance.pk: 
     self.fields['name'].widget.attrs['readonly'] = True 

此外，你还可以设置disable属性。

编辑： 基于@ madzohan的评论，您可以添加一个clean_name方法以确保名称字段在表单级别上不会更改。

def clean_name(self): 
    if self.instance: 
     return self.instance.name 
    else: 
     return self.fields['name']