Django 常见问题及解决方案汇总
自强学堂 Django 教程
1. Django + PostgreSQL: How to reset primary key?
http://stackoverflow.com/questions/544791/django-postgresql-how-to-reset-primary-key
这个是用于在清除表中数据后，数据的 pk 不从1开始增长，将序列重新设置为1的方法。
In your app directory try this:
python manage.py help sqlsequencereset
Pipe it into psql like this to actually run the reset:
python manage.py sqlsequencereset myapp1 myapp2 | psql
Edit: here's an example of the output from this command on one of my tables:
BEGIN;
SELECT setval('"project_row_id_seq"', coalesce(max("id"), 1), max("id") IS NOT null) FROM "project_row";
COMMIT;