OpenSlides/openslides/utils/postgres.py

18 lines
726 B
Python

from django.db import connection
def restart_id_sequence(table_name: str) -> None:
"""
This function resets the id sequence from the given table (the current auto
increment value for the id field) to the max_id+1. This is needed, when manually
inserting object id, because Postgresql does not update the id sequence in this case.
"""
if connection.vendor == "postgresql":
with connection.cursor() as cursor:
cursor.execute(f"SELECT max(id) + 1 as max FROM {table_name};")
max_id = cursor.fetchone()[0]
if max_id is not None:
cursor.execute(
f"ALTER SEQUENCE {table_name}_id_seq RESTART WITH {max_id};"
)