django get the logged in user in the form to build queryset?

Question

I have this model:

class Searches(models.Model):
    user = models.ForeignKey(User)
    .....other fields

Each user has certain saved searches. I want to display a form(a choiceSelect widget) to select one of the several searches and click go. I want to filter in the form to display only the searches of that particular User. This is what I tried. but request.user below does not work. how to fix this?

This is my form:

class SearchesForm(forms.Form):
    #get the queryset for the searches model of logged in user
    qset=Searches.objects.filter(user=request.user) ----> error
    #get the most recent entry
    default=Searches.objects.latest('id')
    choices = forms.ModelChoiceField(queryset=qset,label='select search',initial=default)

EDIT: my view:

def display_search_user(request):
    form=SearchesdiffForm(request)
    if request.method=='POST':
        search=SearchesdiffForm(request,data=request.POST)
        print search
        return HttpResponse(search)
    return render(request,'search_list.html',{'form':form})

Bogdan Iulian Bursuc · Accepted Answer · 2014-04-03T19:46:04.167

5

The instance of the queryset is created when the server starts and there is no knowledge about the request at that moment. The request is specific to each request

You have to pass the request to the form __init__ when you create the form in the view:

class SearchesForm(forms.Form):
    choices = forms.ModelChoiceField(queryset=Searches.objects.none(),
                                     label='select search')

    def __init__(self, request, *args, **kwargs):
        super(SearchesForm, self).__init__(*args, **kwargs)
        if request.user:
            queryset = Searches.objects.filter(user=request.user)
        else:
            queryset = Searches.objects.all()
        latest = queryset.latest('id')
        self.fields['choices'].queryset = queryset

def my_view(request):
    if request.method == 'POST':
        form = SearchesForm(request, request.POST)
        if form.is_valid():
            # return search template here.
            return render(...)
    else:
        form = SearchesForm(request, request.POST)
    return render(request, 'template_name.html', {'form': form})

edited Apr 03 '14 at 19:46

answered Apr 03 '14 at 19:13

Bogdan Iulian Bursuc

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Searches.objects.empty() is undefined why is that? – brain storm Apr 03 '14 at 19:19
yep, I figured that out, and I tried, but I get `MultiValueDictKeyError` – brain storm Apr 03 '14 at 19:24
I get 'No data received' on the browser. I used your exact code above for forms. I pasted my view in edit above – brain storm Apr 03 '14 at 19:43
I though you know how to use the view. Mine was an example on just how to use the form in the view. You need to pass the form to the template and all. – Bogdan Iulian Bursuc Apr 03 '14 at 19:44
I updated with a better `view` but you may still need to add some functionality. – Bogdan Iulian Bursuc Apr 03 '14 at 19:46
how do I get what is selected in the form (after it is posted), so that I could use it in return render(...). There is a search Object that is selected from choicefield, which is in postdata. how can I retrieve that search object? – brain storm Apr 03 '14 at 19:51
and the initial value in the form is not loading up. it is still `-------` – brain storm Apr 03 '14 at 20:09
I fixed everything, it must be `else: form = SearchesForm(request)`. thats it – brain storm Apr 03 '14 at 20:49

django get the logged in user in the form to build queryset?

1 Answers1