How to reset the sequence for IDs on PostgreSQL tables

Question

I recently imported a lot of data from an old database into a new Postgresql database as the basis for models in a new Django site.

I used the IDs from the old datab

Answer 1

Here's a short snippet to reset all sequences in Django 1.9+ (based on http://djangosnippets.org/snippets/2774/) and compatible with Python 3:

import os
from io import StringIO

os.environ['DJANGO_COLORS'] = 'nocolor'

from django.core.management import call_command
from django.apps import apps
from django.db import connection

commands = StringIO()
cursor = connection.cursor()

for app in apps.get_app_configs():
    label = app.label
    call_command('sqlsequencereset', label, stdout=commands)

cursor.execute(commands.getvalue())