Django class inheritance to create table tables

Question

I'm beginning to learn Django and setting up my models for a MySQL database. I'd like one of my classes to inherit another class so that the properties carry on to the table.

from django.db import models

class Images(models.Model):
    category    = models.ForeignKey(Categories)
    title       = models.CharField(max_length=250)
    caption     = models.CharField(max_length=250)
    date        = models.DateTimeField('date published')
    url         = models.CharField(max_length=250)

    class Meta:
        verbose_name_plural = 'images'

    def __unicode__(self):
        return self.category

class Videos(Images):

    provider_list   = (('YU','YouTube'),('VI','Vimeo'))
    provider        = models.CharField(max_length=2, choices=provider_list)

    class Meta:
        verbose_name_plural = 'videos'

    def __unicode__(self):
        return self.category

When I run python manage.py syncdb however, the table "videos" only has a primary ID column and a provider column. Is it necessary to redeclare all of the columns from Images and set up Videos as a completely independence class or is there anyway I can inherit all of these columns into the Videos class?

stupidbodo · Accepted Answer · 2014-08-03 00:47:55Z

2 things:

1) You can consider using abstract base class

2) Use full caps for constants in your choices

To answer your questions you do not need to redeclare all the columns.

from django.db import models

class BaseMedia(models.Model):
    category    = models.ForeignKey(Categories)
    title       = models.CharField(max_length=250)
    caption     = models.CharField(max_length=250)
    date        = models.DateTimeField('date published')
    url         = models.CharField(max_length=250)

    class Meta:
        abstract = True

class Images(BaseMedia):

    class Meta:
        verbose_name_plural = 'images'

    def __unicode__(self):
        return self.category

class Videos(BaseMedia):

    PROVIDER_LIST_CHOICES   = (('YU','YouTube'),('VI','Vimeo'))
    provider        = models.CharField(max_length=2, choices=PROVIDER_LIST_CHOICES)

    class Meta:
        verbose_name_plural = 'videos'

    def __unicode__(self):
        return self.category

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