Django Migration Error: Column does not exist

Question

Python 3, Django 1.8.5, Postgres

I have a model Sites that has been working fine. I recently tried to add a field, airport_code, and migrate the data.

Answer 1

I got the same issue, here is my case: in the app MyApp I add a new field to the model:

class Advisors(models.Model):
    AdvID = models.IntegerField(primary_key=True)
    Name = models.CharField(max_length=200,null=False)
    ParentID = models.IntegerField(null=True) # <--- the NEW field I add

so what I did is: in the urls.py of MyProject, NOT MyApp, comment out the url() linked to MyApp and then do makemigrations and migrate everything goes well; in MyApp/urls.py file:

urlpatterns = [
    url(r'^admin/', admin.site.urls, name='admin'),
    url(r'^$', views.HomePage.as_view(),name='home'),
    #comment out the following line, after migrate success, bring it back;
    # url(r'^myapp/', include('myapp.urls',namespace='research')), <--- 
]