Django modelformset_factory deleting objects marked by can_delete

问题

Hello I have got question I have made modelformset_factory and in options I have choosen can_delete = True and now I don't know how to delete marked objects as 'DELETE' : True to delete them from database. I was trying to do this in some ways and it didnt work. I was looking for it also in django formsetmodels documentation but this didnt help me. With this option can_delete = True I get additional checkbox in my html page Delete and marking him only prints me in console on print: {'username': 'sw', 'email': 'a@gmail.com', 'city': 'ss', 'code': 12345, 'id': , 'DELETE': False}

Saving forms to database is working but I dont know how to delete marked forms from database.

I would be very thankful for every help.

I have made modelformset_factory from model in models.py

class TestModel(models.Model):
username = models.CharField(max_length=120)
email = models.EmailField()
city = models.CharField(max_length=120)
code = models.IntegerField()
#W admin panelu za miast TestModel object bedzie username
def __str__(self):
    return self.username

Then I have added in my views.py function:

def django_modelformset(request):
TestModelFormset = modelformset_factory(TestModel, fields=['username', 'email', "city",
                                                           "code"], extra=1, can_delete=True)
formset = TestModelFormset(request.POST or None)

if formset.is_valid():
    for form in formset:
        print(form)

        print(form.cleaned_data)
        form.save()
context = {"formset": formset}
return render(request, "modelformset.html", context)

My modelformset.html looks like this:

<form method="POST" action="">
{% csrf_token %}

{{ formset.management_form}}
{% for form in formset %}
<div>

    {{ form.as_p }}
    <hr/>
</div>
{% endfor %}
<input type="submit" value="Save">

回答1:

I haven't personally had to do this, but from the docs it seems you have a few options.

Call save on the formset instead of each form.
```
if formset.is_valid():
    formset.save()
```

If you must loop through each form you could something like this.

if formset.is_valid():
   for form in formset:
       print(form.cleaned_data)
       if form.cleaned_data["DELETE"]:
           # Do what you want with the form data
           # i.e. get the object from the database and delete it.
       else:
           form.save()

Loop through the deleted forms separately.

if formset.is_valid():        
    forms = formset.save(commit=False)
    for object in formset.deleted_objects:
        object.delete()

来源：https://stackoverflow.com/questions/47625533/django-modelformset-factory-deleting-objects-marked-by-can-delete

标签

django

python-3.x

django-forms

modelform