How to save a record?

Question

Django

Good night, I spent 2 hours on the question of how to save a record in the database? Here is the code

#form
class AddPerformerForm(ModelForm):
    categories = forms.ModelChoiceField(queryset=Category.objects.all(),
                                        widget=forms.CheckboxSelectMultiple,
                                        empty_label=None)

    class Meta:
        model = Performer
        fields = ['user', 'categories']
#models
class Category(models.Model):
    name = models.CharField(max_length=64)

    def __str__(self):
        return self.name


class Performer(models.Model):
    user = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        on_delete=models.CASCADE,
    )
    categories = models.ManyToManyField(Category)
#view
def create_performer(request):
    form = AddPerformerForm({'user': request.user})
    if request.method == 'POST':
        if form.is_valid():
            form.save()
            return HttpResponseRedirect('/')
        else:
            return HttpResponse('No')
    context = {"form": form}
    return render(request, "performerslist/addperformer.html", context)

<form action="/create-performer/" method="POST">
      {% csrf_token %}
        <div class="row">
        {% for category in form.categories %}						
            {{category.tag}}
            <label for="{{category.id_for_label}}">{{category.choice_label}}</label>
            <br>
        {% endfor %}
        <button class="btn">button</button>
      </div>
    </form>

The fact is that the form does not pass validation, because only categories are transferred to the form without the user himself.

Answer 1

form = AddPerformerForm({'user': request.user})
In this line, you initialize the form with just the user, without passing in the required categories. Of course it won't pass validation.

if request.method == 'POST':
    form = AddPerformerForm({'user': request.user, 'categories': request.POST['ключ-с-категориями']})
    if form.is_valid():
        form.save()
        return HttpResponseRedirect('/')
    else:
        return HttpResponse('No')
form = AddPerformerForm()
context = {"form": form}
return render(request, "performerslist/addperformer.html", context)