2019-12-06
# Application three-step model
1. Configure
- Create a database first
-app To register
- database user must have permission to create a database
__init__.py to be modified
2. Write a class model
3, create a migration manage.py makemigrations appname Python
# just to be a record, not touch the database
4, the database application migration is really the essence of operation, build tables / Modify table
python manage.py migrate
django project, touch the database run-off makemigrations
If you re-create a django project, you must re-create the virtual environment python