cmsmanage/tasks/forms.py

from datetime import datetime

from django import forms

from .models import Event

class EventForm(forms.ModelForm):
    class Meta:
        model = Event
        fields = ['date', 'user', 'notes']

    def __init__(self, *args, **kwargs):
        user = kwargs.pop('user')
        super().__init__(*args, **kwargs)

        self.fields['date'].initial = datetime.now()
        self.fields['user'].initial = user
        if not user.is_staff:
            print(list(self.fields['user'].choices))
            self.fields['user'].choices = [(user.id, user)]