models.py

from django.db import models
from django.contrib import admin

POST_TYPES = (
    ('A', 'Audio'),
    ('V', 'Video'),
    ('U', 'URL'),
    ('Q', 'Quote'),
    ('I', 'Image'),
)

class Post(models.Model):
  title = models.CharField(max_length=100)
  body  = models.TextField()
  type  = models.CharField(max_length=1, choices=POST_TYPES)


admin.site.register(Post)