Cannot resolve bases ??

[Niels Jakob Buch]

Im stuck in this annoying error. Trying to run the "python manage.py createdb" in the project root

[lots of error lines removed]
  File "C:\Code\MEZ4\lib\site-packages\django\db\migrations\state.py", line 270, in render_multiple
    "for more" % (new_unrendered_models, get_docs_version())
django.db.migrations.state.InvalidBasesError: Cannot resolve bases for [<ModelState: 'myapp.myPage'>]
This can happen if you are inheriting models from an app with migrations (e.g. contrib.auth)
 in an app with no migrations; see https://docs.djangoproject.com/en/1.8/topics/migrations/#dependencies for more

I am having a page that is used for an app:

class TrapsPage(Page, RichText):
    add_toc = models.BooleanField(_("Add TOC"), default=False,

                                  help_text=_("Include a list of child links"))


    class Meta:
        verbose_name = _("My Page")
        verbose_name_plural = _("My Pages")

Can anyone point in a meaningful direction for further investigation...?

[Niels Jakob Buch]

Nevermind, I found a solution:

Run "python manage.py makemigrations myapp" first to create migrations focused on your app...

Before the usual createdb stuff...

I still dont understand why this is an issue with a clean database.

[Eduardo Rivas]

I think Django wouldn't know how to create your application's tables without the migration files. Migrations are required with every concrete model in Django 1.7 and up.

[Niels Jakob Buch]

That explains the need for the first app-specific migrations.

What about mezzanine, does it come with built-in migrations.

On Sun, Sep 13, 2015 at 3:48 PM, Eduardo Rivas <jeriva...@gmail.com> wrote:

I think Django wouldn't know how to create your application's tables without the migration files. Migrations are required with every concrete model in Django 1.7 and up.

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[Ken Bolton]

Hi Niels,

Mezzanine does come with built-in migrations; pages, blog, core, forms, and gallery should interest you.

-ken

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[Niels Jakob Buch]

Now it all makes sense, thanks a lot!