Re: Unique and null

I'm not sure about the case with null. However, I believe that most uses of CharField leave null=False and use the empty string instead to represent "empty" value.

On April 7, 2021 1:06:44 AM CDT, Mike Dewhirst <miked@dewhirst.com.au> wrote:

I have just made a CharField unique and Django detects duplicates nicely 
but seems to ignore multiple instances where the field value is null.

     arn = models.CharField(
         max_length=MEDIUM,
         unique=True,
         null=True,
         blank=True,
     )

Is this correct behaviour?

Thanks

Mike