Django Form Form to fill multiple models at once - django-forms

Question

I have a few models that are all coming together in the Thema model. But I need a form to fill them all at once from the thema form. My problem is that when I create a form from the model it just creates a selection of for example tags that already exist in the database. But I need to create new ones in the form as well at the same time.
I want the user to fill in stuff in the Thema, upload a file to the file Model, create or select tags in the tags model and select or create into the Categories model.
The Problem is how can I bring all of them together in one Form? Also the Thema Model uses a related field to the Bilder model but I can´t upload new pics in the Thema form which are then stored in the Bilder Model.
This is the model.py
from django.db import models
from django.urls import reverse
from datetime import datetime
class Category(models.Model):
name = models.CharField(max_length=250, help_text='Kategorie', blank=True)
class Meta:
verbose_name_plural = "Categories"
def __str__(self):
return self.name
class Link(models.Model):
alias = models.CharField(max_length=250, help_text='Linkalias', blank=True)
link = models.URLField(("Links zum Thema"), max_length=128, db_index=True, unique=True, blank=True)
def __str__(self):
return self.alias
class File(models.Model):
name = models.CharField(max_length=250, help_text='Dateiname', blank=True)
upload = models.FileField(upload_to ='uploads/', null=True, blank=False)
def __str__(self):
return self.name
class Tag(models.Model):
name = models.CharField(max_length=250, help_text='tagname', blank=True)
def __str__(self):
return self.name
class Thema(models.Model):
publication_date = models.DateField(verbose_name="Date the Post was published.", default=datetime.now)
title = models.CharField(max_length=70, help_text="The title of the Post")
text = models.TextField(max_length=5000,default='text 1')
text2 = models.TextField(max_length=5000,default='text 2')
text3 = models.TextField(max_length=5000,default='text 3')
# Relation Fields
category = models.ForeignKey(Category, on_delete=models.CASCADE)
links = models.ManyToManyField(Link)
files = models.ManyToManyField(File)
tags = models.ManyToManyField(Tag)
def get_absolute_url(self):
return reverse('thema-detail', kwargs={'pk' : self.pk})
def __str__(self):
return self.title
class Bilder(models.Model):
name = models.CharField(max_length=250, help_text='Bildname', blank=True)
beschreibung = models.CharField(max_length=400, help_text='Kurzbschreibung', blank=True)
thema = models.ForeignKey(Thema, on_delete=models.CASCADE, related_name='bilder', null=True)
image = models.ImageField(null=True, blank=True, upload_to='images/')
class Meta:
verbose_name_plural = "Bilder"
def __str__(self):
return self.name
and this is my attempt to create the form:
from django import forms
from django.forms import formset_factory
from .models import Thema, Bilder, Category, Link, File, Tag
from django.forms import formset_factory
class BilderForm(forms.ModelForm):
class Meta:
model = Bilder
fields = ['name', 'beschreibung', 'image']
BilderFormSet = formset_factory(BilderForm, extra=1)
class ThemaForm(forms.ModelForm):
bilder_formset = BilderFormSet()
class Meta:
model = Thema
fields = ['publication_date', 'title', 'text', 'text2', 'text3', 'category', 'links', 'files', 'tags']
def __init__(self, *args, **kwargs):
self.bilder_formset = kwargs.pop('bilder_formset', None)
super().__init__(*args, **kwargs)