Filter_in_Forms

## Make a form constructor like that
## in forms.py
class Your_Form(forms.ModelForm):

    class Meta:
        model = Your_Model
        fields = [ 'city_id', 'user_id', ... ]

    def __init__(self, *args, city_id, user_id, **kwargs):
        ## put variables between args and kwargs otherwise  you will get an error
        ## Don't forget to use it in views.py like this
        #(
        #   form=Your_Form(request.POST, city_id=city_id,
        #    user_id=user_id)
        #)
        ## also it is good to pass a variable in your URL if you want
        # self.Your_FORM_FIELD = city_id
        self.city = city_id
         self.user = user_id

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

        var = YourModel.objects.get(city_id=self.city_id)
        # Assuming that you have 'role' CharField as choice field in your (User or CustomUser model)
        # with ('admin', 'manager', 'employee', 'customer')
        if self.user.role == 'admin':  # make a condition to filter
            var = YouModel.objects.all()
            var2 = ''
            var3 = ''
        else:
            var = YourModel.objects.get(user_id=self.user)
            var2 =  Another_Model.objects.get(user_id=self.user)
            ## var.get_preparation_period(),
            # "get_preparation_period()" it is a method from the models.py, use it as follows.
            var3 = var2.get_preparation_period()

        self.fields['city'].queryset = var
        self.fields['another_field'].widget.attrs['value'] = var3 # if you want to make a default value for this field
        self.fields['another_field'].widget.attrs['value'] = var2