[Need a fix] Migrations fails when date column's default is specified as None

[dashsatish]

Hi,
When column type is Date(null=True, default=None). Migration fails!

Snippet:

Running migrations ...
All migration ids = ['2020-12-15T18:55:12', '2020-12-16T19:54:32', '2020-12-17T10:58:36', '2020-12-17T16:01:04', '2020-12-17T16:15:15', '2020-12-17T16:19:27', '2020-12-17T20:23:06', '2020-12-22T16:44:03', '2021-01-05T13:56:22', '2021-01-07T19:52:45', '2021-01-08T12:52:56', '2021-01-08T21:26:24', '2021-01-08T22:05:10']
Haven't run = ['2021-01-08T22:05:10']
Running MigrationManager ...
The command failed.
syntax error at or near "DEFAULT"

Content of migration file that failed:

manager.alter_column(
        table_class_name="Summary",
        tablename="summary",
        column_name="due_date",
        params={"default": None},
        old_params={"default": DateNow()},
    )

[dantownsend]

@dashsatish Thanks for reporting this. There's an error in the SQL generated by the migration. I've got a fix, and will release it soon.

[dantownsend]

@dashsatish It's fixed now - v0.14.13 on PyPI. Thanks!