having trouble with django models

Hello, I am newbie to django. I was trying my hand on models. When i used the below code in models.py, "timestamp" and "updated" are not able visible on admin site. Is something wrong with the code? 

'''

from django.db import models

# Create your models here.

class RestaurantLocation(models.Model):

    name             = models.CharField(max_length=120)

    location         = models.CharField(max_length=120, null=True, blank=True)

    category         = models.CharField(max_length=120, null=True, blank=True)

    timestamp        = models.DateTimeField(auto_now=False,auto_now_add=True)

    updated          = models.DateTimeField(auto_now=True, auto_now_add=False)

    

'''

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