To reverse all migrations for an app, you can run:
python manage.py migrate my_app zero
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To reverse all migrations for an app, you can run:
python manage.py migrate my_app zero
I want to recreate the migrations, so I deleted files under migrations folder, and drop the database. And try this python manage.py makemigrations
, it reponse No changes detected
.
Create the database again, and clear files and folders under migrations, then try the following:
python manage.py makemigrations --empty appname
python manage.py makemigrations
python manage.py migrate
It works!
mysql server was installed by brew install mysql
ERROR: Failed building wheel for mysqlclient
ld: library not found for -lssl
clang: error: linker command failed with exit code 1 (use -v to see invocation)
error: command 'clang' failed with exit status 1
Exception: Wrong MySQL configuration: maybe https://bugs.mysql.com/bug.php?id=86971 ?
In the Django's tutorial, I created an app name front, and its urls.py definition like this:
from django.contrib import admin
from django.urls import path, include
urlpatterns = [
path('front/', include('front.urls')),
path('admin/', admin.site.urls),
]
So, if the app's url in web browser is http://127.0.0.1:8000/front/
In fact, most website the home page won't have subdirectory. So, the solutions is here:
from django.contrib import admin
from django.urls import path, include, re_path
urlpatterns = [
re_path(r'^', include('front.urls')),
path('front/', include('front.urls')),
path('admin/', admin.site.urls),
]
Now, you can visit the app root url in the home page. http://127.0.0.1:8000/