How to make Createview with filters for a field from another model?

Question

Django

I am using Django 3.0.8 and Python 3.8. There are models:
models.py

class group(models.Model):
    group = models.CharField('Группа', max_length=5, unique=True)
    
def __str__(self):
        return self.group

class city(models.Model):
    tspk = models.CharField('Город', max_length=255, unique=True)
    
def __str__(self):
        return self.tspk

class chisl(models.Model):
    FIO = models.CharField('ФИО', max_length=255)
    WINLOGIN = models.CharField('Winlogin', max_length=255, unique=True)
    GROUP_ID = models.ForeignKey(group, on_delete=models.PROTECT, verbose_name='Группа')
    TSPK_ID = models.ForeignKey(city, on_delete=models.PROTECT, verbose_name='Город')
    def __str__(self):
        return self.WINLOGIN

class clear(models.Model):
    chas = [
        ('0', '0'), ('1', '1'), ('2', '2'), ('3', '3'),
        ('4', '4'), ('5', '5'), ('6', '6'),
        ('7', '7'), ('8', '8'), ('9', '9'),
        ('10', '10'), ('11', '11'), ('12', '12'),
        ('13', '13'), ('14', '14'), ('15', '15'),
        ('16', '16'), ('17', '17'), ('18', '18'),
        ('19', '19'), ('20', '20'), ('21', '21'),
        ('22', '22'), ('23', '23')
    ]

    WINLOGIN = models.ForeignKey(chisl, related_name='Winlogin', verbose_name='winlogin', on_delete=models.PROTECT)
    DATE_CLEAR = models.DateField('Дата чистки')
    HOUR_FROM = models.CharField('с', max_length=2, choices=chas)
    HOUR_TO = models.CharField('по', max_length=2, choices=chas)
    COMMENT = models.CharField('Комментарий', max_length=255, null=True, blank=True)
    CAUSE = models.CharField('Причина', max_length=255, null=True, blank=True)
      
    def __unicode__(self):
        return u"%i" % self.WINLOGIN

At the moment there is forms.py

class ClearForm(forms.ModelForm):
    class Meta:
        model = clear
        fields = ['WINLOGIN', 'DATE_CLEAR', 'HOUR_FROM', 'HOUR_TO', 'CAUSE',  'COMMENT']

    def clean(self):
        hour_from = self.cleaned_data['HOUR_FROM']
        hour_to = self.cleaned_data['HOUR_TO']
        if hour_from > hour_to:
            raise ValidationError('"Время C" должно быть меньше')
        return self.cleaned_data

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        for field in self.fields:
            self.fields[field].widget.attrs['class'] = 'form-control'

in views.py file

class Clear(PermissionRequiredMixin, CreateView):
    permission_required = 'clear.add_clear'
    model = clear
    template_name = 'clear/add_clear.html'
    form_class = ClearForm
    success_url = reverse_lazy('line2clear')
    extra_context = {'title': 'Добавить в чистку'}

in urls.py file

path('add_line2clear/', views.AddLine2Clear.as_view(), name='add_clear'),

in html file:

{% extends 'base.html' %}

{% block title %}{{ title }}{% endblock %}

{% block content %}
<h1 class="mt-3">{{ title }}</h1>
<div class="col-3 ml-4">
<form class="mt-4" action="{% url 'add_clear' %}" method = 'post'>
    {% csrf_token %}
{{ form }}

        <button type="submit" class="btn btn-danger btn-block mt-2">Добавить запись</button>


</form>
</div>
{% endblock %}

I want to make a city, group filter in the form of adding an entry, and display the name of the city, group satisfying the filters in the drop-down list.

But no matter what I try to do, I get errors. I would really appreciate any help or information on how to solve this problem.