django-views

问题 I have an app that serves to update certain fields of a model. There are 4 possible fields that could be updated: resolution, upload4, upload5, and upload6. The upload fields are NOT required. If I do not include the request.FILES line, the uploaded file will not be saved to the database, but it seems like because I've included it, I need to always upload the 3 files, even though they are not required. The exception I am getting is "MultiValueDictKeyError" on the POST. How can I fix this? I

问题 Garage.cars: object garage has a FK of cars Person.carwishlst: object Person has FK of cars they would like. In Django how to I achieve the following, loop?... Get the total number of cars x the Person has which match the ones the Garage has. Outcome: i.e. Grange has 4 cars you want Hypothetical, but lets say Grange model has an FK cars = models.ManyToManyField(Cars) Person also has a FK cars_wishlist = models.ManyToManyField(Cars) 回答1: Assuming the cars and carwishlst are lists: You would do

问题 How can I access the object passed by the user inside a generic view class? In template, when the user clicks the link: <td><a href="{% url 'update_peon' pk=item.pk %}"><button class="btn btn-warning">Edit</button></a></td> this goes to urls.py: url(r'^update_peon/(?P<pk>\d+)$', views.UpdatePeon.as_view(), name='update_peon'), and my view: class UpdatePeon(generic.UpdateView): login_required = True template_name = 'appform/Peons/peon_form.html' model = Person form_class = PersonForm success

问题 I'm having a rather simple problem, but found a few solutions and couldn't stop wondering what the intended DRF approach would be. I have a (simplified) model and serializer like this: class CartProduct(models.Model): cart = models.ForeignKey('Cart', on_delete=models.CASCADE) product = models.ForeignKey('Product', on_delete=models.CASCADE) class CartProductSerializer(serializers.HyperlinkedModelSerializer): id = serializers.ReadOnlyField() product = ProductSerializer() class Meta: model =

问题 I have a project with several views e.g. - index, contacts and about. And I want url www.aaa.net links to index view, www.aaa.net/about to about view and so on In project urls.py I wrote url(r'^$', include('mysite.urls')) In app urls.py I wrote url(r'^$',views.index,name='index'), url(r'about/$',views.about,name='about'), url(r'contacts/$',views.contacts,name='contacts'), But it works only with index view, about and contacts didn't work at all 回答1: Remove the $ at the end of url(r'^$',

问题 I need to add multiple images in django form to one model. I did a research and for form outside of django I try to setup django-multiupload. My models.py: class Profile(models.Model): ... ... first = models.ImageField("first", upload_to='first') second = models.ImageField("second", upload_to='second') ... In forms.py: class AddForm(forms.ModelForm): first = MultiImageField(min_num=1, max_num=20) second = MultiImageField(min_num=1, max_num=4) In views.py: class UploadView(FormView): template

问题 I'm trying to develop an app in Django. At the moment I'm trying to create a comment section for the users to write and submit comments by using a form. I made a template which shows the info of a movie as well as a form through which users can write comments on the film. The problem is that when I write the comment and try to submit it this error shows up : IntegrityError at /myapp2/2/ NOT NULL constraint failed: myapp2_comentario.pelicula_id my Views.py def detallesPelicula(request,

问题 I am trying to add an editable=False field to a custom admin form, but I am getting an error: django.core.exceptions.FieldError: 'help_num' cannot be specified for Investigation model form as it is a non-editable field This is true, in my model I have it set as such: models.py help_num = models.CharField(max_length=17, unique=True, default=increment_helpdesk_number, editable=False) forms.py class HelpDeskModelForm(forms.ModelForm): class Meta: model = HelpDesk fields = [ "help_num", "help

问题 How does template get user object? In other words what process exactly during rendering passes user object to template? And what else is accessible in template? 回答1: Using the django.contrib.auth.context_processors.auth context processor, you can access the auth.User instance in your template. If TEMPLATE_CONTEXT_PROCESSORS contains this processor, every RequestContext will contain these variables: user – An auth.User instance representing the currently logged-in user (or an AnonymousUser

问题 Is there any feature available in django so that we can combine some filtering on all actions in the view of django, like before_filter: is available in rails. 回答1: No. before_, around_ and after_ filter concepts aren't present in Django, but it isn't hard to write your own functions to do the same thing. There are also signals and generic views that might accomplish what you're needing to do. 回答2: I'm still learning Rails but from what I've observed so far python decorators also seem to be