Model data types

Person description

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Imagine describing a person. A person has a date of birth. That field must be a date, and be able to be NULL in the database because the date of birth may be unknown. How can you define this field in the code?

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date_of_birth = models.DateField(blank=True)

date_of_birth = models.DateField()

date_of_birth = models.DateField(null=False)

date_of_birth = models.DateField(blank=False)

date_of_birth = models.DateField(null=True)

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