keymedia/managemedia/models/common.py

from django.db import models
from django.core import validators

class MediaTypes(models.Model):
     MEDIA_TYPES = [
          ('vg', 'Video Games'),
          ('mo', 'Movies'),
          ('tv', 'TV Shows'),
          ('bo', 'Books'),
     ]
     media_type = models.CharField(
          max_length=2,
          choices=MEDIA_TYPES,
     )

class CommonMediaFields(models.Model):
     name = models.CharField('Title', max_length=256)
     media_type = models.ForeignKey('MediaTypes', on_delete=models.CASCADE)
     summary = models.TextField('Summary', blank=True)
     cover = models.ImageField('Cover Image', blank=True)
     backdrop = models.ImageField('Backdrop Image', blank=True)
     release_date = models.DateField('Release Date', blank=True)
     creation_date = models.DateTimeField('Added Date', auto_now_add=True)
     updated_date = models.DateTimeField('Updated Date', auto_now=True)
     original_language = models.CharField('Original Language', max_length=256, blank=True)
     class Meta:
          abstract = True

### VideoFields is for movies and tv shows
class VideoFields(CommonMediaFields):
     tmdb_id = models.CharField('TheMovieDB ID', blank=True, max_length=256)
     imdb_id = models.CharField('IMDB ID', blank=True, max_length=256)
     imdb_rating = models.DecimalField('IMDB rating', max_digits=5, blank=True, decimal_places=3)
     tmdb_rating = models.DecimalField('TheMovieDB rating', max_digits=5, blank=True, decimal_places=3)
     class Meta:
          abstract = True

class Genres(models.Model):
     media = models.ForeignKey('MediaTypes', on_delete=models.CASCADE)
     genre = models.CharField('Genre', max_length=256)

class MediaStatus(models.Model):
     media = models.ForeignKey('MediaTypes', on_delete=models.CASCADE)
     status = models.CharField('Status', max_length=256)