how to make primary key in django model code example

Example 1: primary key django model

class Garden(models.Model):
    garden_id = models.IntegerField(primary_key=True)

Example 2: django custom primary key field

import uuid
from django.db import models

class MyUUIDModel(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    # other fields