django form is not saved

Using Django
1

I am trying to create an ecommerce application. When a user tries to create a listing, the listing is not saved. ‘Save’ method does not work.
Model:

from django.contrib.auth.models import AbstractUser

from django.db import models

from django.contrib.auth.decorators import login_required

from django.utils import timezone

class User(AbstractUser):

    pass

class Listings(models.Model):

    id = models.AutoField(primary_key=True)

    title = models.CharField(max_length=64)

    description = models.CharField(max_length=300)

    startBids = models.DecimalField(max_digits=5, decimal_places=2)

    seller = models.ForeignKey(User,on_delete=models.CASCADE,default=None)

    category = models.CharField (max_length=64,default=None)

    img = models.CharField(

        max_length=200, default=None, blank=True, null=True)

    created_at = models.DateTimeField(default=None)

    

    def __str__(self):

        return f"{self.id}: {self.title} {self.startBids} {self.seller}"

form.py

from django import forms

class CreateListingForm(forms.Form):

    title = forms.CharField(max_length=64)

    description = forms.CharField(max_length=300)

    startBids = forms.DecimalField(max_digits=5, decimal_places=2)

    img = forms.CharField(max_length=200, default=None, blank=True, null=True)

Views.py

from django.contrib.auth import authenticate, login, logout

from django.db import IntegrityError

from django.http import HttpResponse, HttpResponseRedirect

from django.shortcuts import render

from django.urls import reverse

from django.contrib.auth.decorators import login_required

from django import forms

from auctions.forms import CreateListingForm

from django.utils import timezone

from datetime import datetime, timedelta, tzinfo

from .models import *

@login_required(login_url='/login')

def CreateListing(request):

    

    if request.method == "POST":

        listing = Listings()

        

        listing.title = request.POST["title"]

        listing.description = request.POST["description"]

        listing.startBids = request.POST["startBids"]

        listing.seller = request.user.username

        listing.created_at = datetime.now()

        listing.save()

        return HttpResponseRedirect(reverse("index",))

    else:

        NewListing = CreateListingForm()

        return render(request, "auctions/createListing.html",{

        "NewListing": NewListing

        })
2

I’m guessing there’s an error being thrown somewhere - probably in the console where you’re running this.

But without seeing that, my initial reaction is that you’ve got description as a not-null field, but it has a default value of None - which would be invalid in the model, and you’re not assigning a description in your form.

Also, I would suggest you take some time to review the Working with Forms documentation, particularly the example of how to work with a form in the POST section of your view. You’re manually doing work that you don’t need to do when you are using a form, and even more work you wouldn’t need to do if you were to use a ModelForm.

Ken

3

Thank you for quick reply and suggestion.