optional fields in django models

I have the following model in django.

class Link(models.Model):
    name = models.CharField(max_length=100)
    url = models.CharField(max_length=100)
    tag = models.CharField(max_length=100)

    def __unicode__(self):
        return self.name

I need the url field to be optional. How do I do this?


Add the attribute blank=True. Optionally, you can also make the field NULLable with null=True.

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