Django for ISchoolers: Difference between revisions

You should get a warning message that looks like this:

<code>

? The field 'Question.pub_date' does not have a default specified, yet is NOT NULL.

? Since you are removing this field, you MUST specify a default

? value to use for existing rows. Would you like to:

? 1. Quit now, and add a default to the field in models.py

? 2. Specify a one-off value to use for existing columns now

? 3. Disable the backwards migration by raising an exception.

</code>

South insists on having a default value for this field just in case, even though we're about to remove it. So, let's do that. Enter '2'.

<code>

? Please enter Python code for your one-off default value.

? The datetime module is available, so you can do e.g. datetime.date.today()

</code>

pub_date is supposed to be a date of some kind. The default may as well be today!

<code>

? Please enter Python code for your one-off default value.

? The datetime module is available, so you can do e.g. datetime.date.today()

>>> datetime.date.today()

</code>

South will then happily finish creating your migration.

Running migrations for qandabear:

- Migrating forwards to 0002_auto__add_field_answer_votes__del_field_question_pub_date.

> qandabear:0002_auto__add_field_answer_votes__del_field_question_pub_date

- Loading initial data for qandabear.

No fixtures found.

Success!