Migration Operation CreateCollation kwargs are truncated when used with makemigrations --update

[Gerald Goh]

For this case I have created an initial migration where a collation is the only operation
I wish to merge my initial user model creation with the collation creation so this is done at the same time.

Input (from 0001_collation.py)

        django.contrib.postgres.operations.CreateCollation(
            name='case_insensitive',
            provider='icu',
            locale='und-u-ks-level2',
            deterministic=False,
        ),

Expected Output (0001_initial.py)

        django.contrib.postgres.operations.CreateCollation(
            name='case_insensitive',
            provider='icu',
            locale='und-u-ks-level2',
            deterministic=False,
        ),

Actual Output (0001_initial.py)

        django.contrib.postgres.operations.CreateCollation(
            name='case_insensitive',
            locale='und-u-ks-level2',
        ),

Possibly caused by

django/contrib/postgres/operations.py:169

    def __init__(self, name, locale, *, provider="libc", deterministic=True):

With "provider" and "deterministic" being keyword arguments only.

[David Sanders]

Thanks for the report 🏆

Confirmed that these kwargs disappear with an update.

[Mariusz Felisiak <felisiak.mariusz@…>]

In 06264258:

Fixed #35175 -- Made migraton writer preserve keyword-only arguments.

Thanks Gerald Goh for the report.