Why are m2m not sent from the form?

Question

Django

Hello, for some reason the multiple choice fields from the form are not sent, what should I do?
Form Output

<form method="POST" class="post-form" enctype="multipart/form-data">{% csrf_token %}
            {{ form|bootstrap}}
            <button type="submit" class="save send">Сохранить</button>
        </form>

forms.py

class FarmEditFood(forms.ModelForm):
    class Meta:
      model = Ranch
      fields = ('foods','category','ranchmode','typeprod','ranchmode', 'delivery','delivery2' )

Ordinary textFields are saved, but these are not, what could be the reason?

Answer 1

<form action="{% url 'edit_view' %}">