File Manager

X7ROOT File Manager

Current Path: /opt/cloudlinux/venv/lib/python3.11/site-packages/pylint_django/tests/input/migrations

opt / cloudlinux / venv / lib / python3.11 / site-packages / pylint_django / tests / input / migrations /

ðŸ“ ..
ðŸ“„ 0001_noerror_initial.py(608 B)
ðŸ“„ 0002_new_column.py(1.04 KB)
ðŸ“„ 0002_new_column.txt(137 B)
ðŸ“„ 0003_without_backwards.py(575 B)
ðŸ“„ 0003_without_backwards.txt(448 B)
ðŸ“„ 0004_noerror_with_backwards.py(467 B)
ðŸ“„ __init__.py(0 B)
ðŸ“ __pycache__

Editing: 0002_new_column.py

"""
Migration file which adds a new column with a default value.
This should trigger a warning because adding new columns with
default value on a large table leads to DB performance issues.

See:
https://github.com/PyCQA/pylint-django/issues/118 and
https://docs.djangoproject.com/en/2.0/topics/migrations/#postgresql

> ... adding columns with default values will cause a full rewrite of
> the table, for a time proportional to its size.
> For this reason, it’s recommended you always create new columns with
> null=True, as this way they will be added immediately.
"""
# pylint: disable=missing-docstring, invalid-name
from datetime import timedelta

from django.db import migrations, models

class Migration(migrations.Migration):

dependencies = [
        ("input", "0001_noerror_initial"),
    ]

operations = [
        # add a timedelta field
        migrations.AddField(  # [new-db-field-with-default]
            model_name="testrun",
            name="estimated_time",
            field=models.DurationField(default=timedelta(0)),
        ),
    ]

X7ROOT File Manager

Editing: 0002_new_column.py

Upload File

Create Folder