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pythondjangomodels

Using a django model as a field for another model?

I have been tasked with creating Django Models for a hypothetical apartment booking application.

My question is: can I use a model that I've defined, as a field in another model?

For example, I will have one model called "Listing" that represents an apartment being listed.

class Listing(models.Model):
    address = models.IntegerField()
    owner = models.CharField(max_length=256)
    duration =  models.DurationField()
    price= models.IntegerField()

I also want to have a "Booking" model that represents an apartment once someone has booked it. It will have the exact same info as a Listing, with the addition of the username of the person who booked it. So can I have my Booking model use Listing as a field? And then just have one extra field for the booker's username.

Any other tips/critiques are highly appreciated as I am a complete beginner at Django.

Solution

  • The concept of a model as field is odd. What you can do is establish relationships between models, or to inherit one from the other. Given your situation, you can maybe inherit Booking from Listing:

    The docs on this topic.

    You'll have something like this:

    class Listing(models.Model):
    address = models.IntegerField()
    owner = models.CharField(max_length=256)
    duration =  models.DurationField()
    price= models.IntegerField()

class Booking(Listing):
    #your new fields