Ubuntitis

For the code at the bottom of page 69 to work you need to make sure you have you are import the coltrane Entry model in the urls.py file of the cms app which you should have created in the previous chapter.

The import command will not work because whoever packaged this application forgot to add the file __init__.py which is what tells python that the folder should be treated as a module. After you add an empty file named __init__.py everything should work as expected.

Also the following 2 lines of code are incorrect:

self.body_html = markdown(self.body)
self.excerpt_html = markdown(self.excerpt)

The problem is that the folder module is called markdown, and then the file that contains the class is called markdown, and the class we need  is called Markdown, notice capital M.

Assuming we want to use the import statement as specified in the book, the 2 lines of code above need be changed to:

self.body_html = markdown.Markdown(self.body).convert()
self.excerpt_html = markdown.Markdown(self.excerpt).convert()

The code on these pages will obviously not work as is. If you don’t know why, please read my previous posts.

I will not post how the code should look like, as you should have the correct code if you have been following the posts.

The prepopulate_attribute should be removed from the definition of the slug fields. That option should be in the admin class of the model. See previous posts to know more.

The following line of code is no longer correct:

 slug = models.SlugField(prepopulate_form=['title'],unique=True)

Because the prepopulate_form attribute is something that only has meaning within the admin app, it now has to be put in the admin.py file. Assuming you have read the previous post, the content of admin.py should be the following:

from django.contrib import admin
from coltrane.models import Category

class CategoryAdmin(admin.ModelAdmin):
	model = Category
	prepopulated_fields = {
					"slug" : ("title",)
				}
admin.site.register(Category,CategoryAdmin)

The Category model is using the old way of telling the admin app to include it in the admin section. Read this to know more.

If you have read the previous posts you should be able to know by now what is wrong and how to correct it. But in case you don’t, here is what you need to change to make it work:

1. Delete the following 2 lines:

class Admin:
    pass

2. Go to the folder where you added the models.py file(If you are following the book verbatim it should be named coltrane), create a file called admin.py and the following code to it:

from django.contrib import admin
from coltrane.models import Category

admin.site.register(Category)

Spoiler: You will have to change the code above to include other options before the chapter is over