ID AutoField doesn't get assigned when an object is created

I’m writing a forum using Django and I can’t figure out why after completing the form, the created Thread object doesn’t get an automatically assigned ID.

from django.shortcuts import render, get_object_or_404
from .models import Board
from threads.models import Thread, Board, UserIP
from django.views import generic
from django.http import HttpResponse
from .forms import AddThreadForm

def empty(arg): #preventing boardThreadsView from rendering 2x
    return HttpResponse("")

class BoardListView(generic.ListView): #homepage board listing
    template_name = "index.html"
    queryset = Board.objects.all()

def boardThreadsView(request,pk): #render thread on the board
    arr = []
    for thread in Thread.objects.all():
        for b in thread.boards.all():
            if pk == b.letter:
    return render(
            'threads': arr,
            'boards': Board.objects.all(),
            'thisboard': Board.objects.filter(letter=pk)[0],

def addThread(request,pk): #add thread
    ip = UserIP()
    form = AddThreadForm()
    thread = Thread()
    print(,, thread.amountOfReplies)
    if request.method == "POST":
        form = AddThreadForm(request.POST)
        if form.is_valid():
            # thread = Thread(content = form.cleaned_data['content'], boards=form.cleaned_data['boards'])
    return render(
            'form': form,
            'thread': thread,

import django.apps
from django.db import models
from django.utils import timezone
from boards.models import Board
from django.urls import reverse
# Create your models here.

class Thread(models.Model):
    id = models.BigAutoField(primary_key=True, verbose_name='id')
    content = models.CharField(help_text='Текст вашего сообщения', verbose_name='content', max_length=4096)
    # image = models.ImageField(default=None, upload_to="post_picture")
    date = models.DateTimeField(, verbose_name='date')
    amountOfReplies  = models.IntegerField(default=0, verbose_name='amount-replies')
    userIP = models.ForeignKey('UserIP', on_delete=models.SET_NULL, null=True, verbose_name='IP')
    boards = models.ManyToManyField(Board)

    class Meta:
        ordering = ['-amountOfReplies']

    def __str__(self):
        return str(

    def display_ip(self):
        return self.userIP.ip
    display_ip.short_description = 'IP'

    def display_boards(self):
        return ', '.join([b.letter for b in self.boards.all()])
    display_boards.short_description = 'Boards'

class UserIP(models.Model):
    ip = models.CharField(max_length=16)

    def __str__(self):
        return self.ip
# class Reply(models.Model):
#     content = models.TextField(help_text='Текст вашего сообщения', verbose_name='content')
#     thread = models.ForeignKey('Thread', on_delete=models.CASCADE, null=True, verbose_name='thread')

P.S. I have another app in my django project which has its own views and models, but they don’t really play a big role in what’s happening during the Thread creation, so I left them out.
I’m a newcomer, so bear with me :slight_smile:

You have not yet saved thread at this point. You have an instance created from the form, but it hasn’t yet been written to the database.

You need to do your before assigning these many-to-many relationships.

That helped, thanks a lot!