Django models: default value for column

Question

I have following Django model code:

status = models.PositiveIntegerField(default = 0b000)
comments_allowed = models.BooleanField(default = True)         


        

Answer 1

The only permanent solution is to patch the Django source, specifically db/backends/creation.py:

Find:

if f.primary_key:
    field_output.append(style.SQL_KEYWORD('PRIMARY KEY'))
elif f.unique:
    field_output.append(style.SQL_KEYWORD('UNIQUE'))

After add:

if(f.default != models.fields.NOT_PROVIDED):
    field_output.append(style.SQL_KEYWORD('DEFAULT ' + str(f.default)))

(Source: http://www.supermind.org/blog/671/django-not-setting-default-column-value-in-mysql)

Alternatively (and preferably), if you're using South, you can just execute some additional SQL after the db.create_table in your migration:

MySQL:

db.execute("ALTER TABLE yourapp_yourmodel MODIFY status int Default '4'")

Postgres:

db.execute("ALTER TABLE yourapp_yourmodel ALTER COLUMN status SET DEFAULT 4")

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