Re: ModelChoiceField user filter

Hi, thanks

It is quite similar to what I was doing...

I found another approach a lot more straightforward in an older post:

"""

def event_add_view(request):

""" add an event, it needs to set occurrences to appear in the calendar"""

if request.method !='POST':

form = EventForm()

form.fields["room_calendar"].queryset = RoomCalendarModel.objects.filter(tenants__user=request.user)

form.fields["client"].queryset = Client.objects.filter(user=request.user)

"""
The benefit I find is to intervene directly in the view of the query set.

Thanks

Gabriel

On Friday, 6 December 2024 at 00:28:38 UTC Ryan Nowakowski wrote:

Add super at the top of your __init__ like this:
<https://docs.djangoproject.com/en/5.1/topics/forms/modelforms/#changing-the-queryset>

On December 5, 2024 5:24:07 AM CST, Gabriel Soler <gso...@gmail.com> wrote:

Hi wise Django fellows

I have been trying to create a field that refers to a Foreign Key, which needs to be filtered by the user. I feel this should be something common, and I cannot find a way through it.

I found a solution in a forum and stack overflow and a tutorial that uses the __init__ and passes a value in the view, like Form(user=request.user), to then extract it.

It worked to filter at some point but failed at the end of saving:

Error in formatting: AttributeError: 'EventForm' object has no attribute '_errors'

Sometimes, the problem seems to be the "user" field passed on. 

I am out of the depth of my knowledge in accessing the __init__ and super() here, so I do not know how to troubleshoot. 

"""

class EventForm(forms.ModelForm):

"""Event form"""

client = forms.ModelChoiceField(queryset=None,empty_label="no client?")

room_calendar = forms.ModelChoiceField(queryset=None,empty_label="no room?")

class Meta:

model = Event

fields = ("client","room_calendar",

"title","description","event_type",)

labels = {

"client":"It there a client associated?(optional)",

"room_calendar":"Which room it belongs to?",

"title":"Give it a memorable title",

"description":"What it is about?",

"event_type":"Select a type of event",

}

def __init__(self, *args, **kwargs):

# Extract the user from the view

user = kwargs.pop('user')

super(EventForm, self).__init__(*args, **kwargs)

# Filter authors related to the logged-in user

self.fields['client'].queryset = Client.objects.filter(user=user)

self.fields['room_calendar'].queryset = RoomCalendarModel.objects.filter(Q(tenants__user=user)|Q(user=user))

"""

Thanks

Gabriel

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