Error when publishing an article, what should I do?

Question

Django

I'm writing my first major Django project. To implement it, I need an advanced article editor. I chose ckeditor as such. Attached it, according to the rules to the current post model. Did the migration. The editor appeared, but does not work. When you try to insert a photo, it gives an error and requires you to attach a photo using a link.

and when I try to publish an article without photos, it gives the following:

Django Version: 3.1.2 Exception Type: IntegrityError Exception Value: NOT NULL constraint failed: prosvet_logs_post.publish

At the moment I have the following code:
models.py

class Post(models.Model):
    title = models.CharField(max_length=250)
    slug = models.SlugField(max_length=50, unique=True)
    author = models.ForeignKey(User, on_delete=models.CASCADE, 
    related_name='news_posts', null=True, blank=True)
    body = RichTextUploadingField()


def __str__(self):
    return self.title

class Meta:
    verbose_name = u"Новость"
    verbose_name_plural = u"Новости"

admin.py

from django.contrib import admin
from .models import Post

from prosvet_logs.models import About_us, Post, Contacts, Cooperation, Dialogs, Monologs, Projects


class PostAdmin(admin.ModelAdmin):
    prepopulated_fields = {"slug": ("title",)}

admin.site.register(About_us)
admin.site.register(Post, PostAdmin)
admin.site.register(Cooperation)
admin.site.register(Contacts)
admin.site.register(Dialogs)
admin.site.register(Monologs)
admin.site.register(Projects )

url.py

urlpatterns = [
#Домашняя страница
url(r'', views.index, name ='index'),

#редактор статей
url(r'^ckeditor/', include('ckeditor_uploader.urls')),

]

settings.py

INSTALLED_APPS = [
    'ckeditor',
    'ckeditor_uploader', 
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'prosvet_logs',
]

CKEDITOR_UPLOAD_PATH = 'uploads/'

CKEDITOR_CONFIGS = {
    'default': {
       'toolbar': 'None'
    },
}
python