Django：如何将数据插入字段，其中pk =？

Question

Lets say I have an incident loaded into the database, where there is information in the description and status fields, but action_taken is left NULL.

class Incident(models.Model):
    description = models.TextField()
    status = models.ForeignKey(Status, default="open")
    action_taken = models.TextField()

How can I load information into the action_taken field using this form and view?

forms.py

class ResolveForm(forms.Form):
    action_taken = forms.CharField(widget=forms.Textarea)

views.py

def detail(request, incident_id):

    incident = get_object_or_404(Incident, pk=incident_id)
    template = "incidents/detail.html"

    if request.method == 'POST':    
        form = ResolveForm(request.POST or None)
        if form.is_valid():     
            action_taken = (form.cleaned_data['action_taken'])

            ######### MY EFFORTS #########################
            q = Incident(action_taken=action_taken)
            q.save()
            print(incident.id)
            #new_incident, created = Incident.objects.get_or_create(action_taken)
            ##############################################

            return render(request, template, {'form': form})
    else:
        form = ResolveForm()        
        context = { 'incident': incident,
                    'form': form}

        return render(request, template, context)

errors

incident.action_taken = action_taken

error: name 'action_taken' is not defined

Answer 1

How can I load information into the action_taken field using this form and view?

I see you already have your model instance incident , so this should do it

incident = get_object_or_404(Incident, pk=incident_id)
incident.action_taken = action_taken
incident.save()

If in your update you don't want to touch the other fields:

incident = get_object_or_404(Incident, pk=incident_id)
incident.action_taken = action_taken
incident.save(update_fields=['action_taken'])

To critique what you tried:

q = Incident(action_taken=action_taken)
q.save()

This doesn't get the object you want to update, but instead it creates a new one and saves it (not what you want)