CODEWITHSUNDEEP
djangodjango-modelsuuid
Harry
Harry

Reputation: 13329

Django UUIDField - Make it shorter

Im using the django field like this:

import uuid   
id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)

A typical id would look like this:

6abbde08-99b1-42c7-8bd2-3ec92a4b67b9

Is it possible to make the id shorter, to something like 99b1 ?

Upvotes: 5

Views: 5255

Answers (2)

Rahul Gupta
Rahul Gupta

Reputation: 47876

I don't think it's a good idea to limit the length of UUIDField. The whole point of UUIDField is to generate a unique universal identifier which has no chance that it will generate another UUID having the same value as an existing one.

If you want to truncate the length, you can do that but it might lead to collisions and you would get 2 same ids which you certainly don't want.

UUID takes multiple parameters into consideration when generating a random number, so using UUIDField, you don't need to worry about ever ids being generated same.

UUID values are 128 bits long and “can guarantee uniqueness across space and time”.

Upvotes: 2

Alasdair
Alasdair

Reputation: 309029

The point of a UUID field is that it is extremely unlikely that two uuids generated will collide. You can't store 99b1 in a UUID field, because it's not a UUID.

You could use a CharField with max length 4 as your primary key, but then you will be responsible for generating the primary keys, and making sure that they do not collide.

Upvotes: 4

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