Question

Just finished the Django tutorial. Starting my own project. Using the ManyToMany Relationship example here. I added in the following controls in my admin.py:

class ArticleInline(admin.TabularInline):
    model = Article
    extra = 3

class PublicationAdmin(admin.ModelAdmin):
    inlines = [ArticleInline]

admin.site.register(Publication, PublicationAdmin)

But when I try to add a publication in the admin page, it says:

<class 'polls.models.Article'> has no ForeignKey to <class 'polls.models.Publication'>

Do I have to initialize an article before I can create a publication? Does creating a publication make Django look for an article?

Thanks for the help. Just starting out. It’s pretty overwhelming, but very exciting.

Answer 1

If you’re using a many to many relationship, you need to access the actual through model.

I’m assuming you have something like:

class Publication(models.Model):
    [...]  # your other stuff
    articles = models.ManyToManyField(Article)

Assuming that construction, you access the through model using the attribute spelled similarly:

class ArticleInline(admin.TabularInline):
    model = Publication.articles.through
    [...]  # whatever else you need

Hope that helps!