models.py

from django.db import models
import uuid

class Skill(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False, unique=True)
    title = models.CharField(max_length=200, unique=True)

    def __str__(self):
        return self.title

class Category(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False, unique=True)
    title = models.CharField(max_length=200, unique=True)

    def __str__(self):
        return self.title