from django.db import models
from django.contrib.auth.models import User


class Blog(models.Model):
    owner = models.ForeignKey(User, on_delete=models.CASCADE)
    title = models.CharField(max_length=500)
    slug = models.CharField(max_length=500, editable=False)

class BlogPost(models.Model):
    blog = models.ForeignKey(Blog, on_delete=models.CASCADE)
    title = models.CharField(max_length=500)
    body = models.TextField()
    is_published = models.BooleanField(default=False)
    slug = models.SlugField(max_length=500, editable=False)

from django.shortcuts import render
from django.urls import reverse, path
from django.http.response import HttpResponseRedirect
from django.utils.text import slugify
from django.views.generic.edit import CreateView
from blog.models import Blog

class NewBlogView(CreateView):
    model = Blog
    fields = ['title']
    template_name = 'blog_settings.html'

def form_valid(self, form):
    form.instance.owner = self.request.get.user
    form.instance.slug = slugify(form.instance.title)
    return super().form_valid(form)

NOT NULL constraint failed: blog_blog.owner_id