Из AdvertisementForm(forms.Form) в AdvertisementForm(ModelForm)

from django import forms
 
 
class AdvertisementForm(forms.Form):
    title = forms.CharField(max_length=64, widget=forms.TextInput(attrs={'class': 'form-control'}))
    description = forms.CharField(widget=forms.Textarea(attrs={'class': 'form-control'}))
    price = forms.DecimalField(widget=forms.NumberInput(attrs={'class': 'form-control'}))
    auction = forms.BooleanField(widget=forms.CheckboxInput(attrs={'class': 'form-check-input'}), required=True)
    image = forms.ImageField(widget=forms.FileInput(attrs={'class': 'form-control'}))

from django.forms import ModelForm
 
 
class AdvertisementForm(ModelForm):
    ...

from django.forms import ModelForm
from .models import Advertisement
 
class AdvertisementForm(ModelForm):
    class Meta:
        model = Advertisement
        fields = ['title', 'description', 'price', 'auction', 'image']
        widgets = {
            'title': forms.TextInput(attrs={'class': 'form-control'}),
            'description': forms.Textarea(attrs={'class': 'form-control'}),
            'price': forms.NumberInput(attrs={'class': 'form-control'}),
            'auction': forms.CheckboxInput(attrs={'class': 'form-check-input'}),
            'image': forms.FileInput(attrs={'class': 'form-control'})
        }