Ревью и отладка Django‑кода

Требуется выполнить проверку качества и корректность работы представленного кода Django‑приложения, а при необходимости исправить найденные ошибки.

# push/models.py

from django.db import models
import enums

class PlannedPush(models.Model):
    title = models.CharField(max_length=255)
    body = models.TextField()
    is_promo = models.BooleanField(default=False)
    status = models.CharField(max_length=255, choices=enums.PushStatus.choises(), default=enums.PushStatus.CREATED)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

class Push(models.Model):
    planned_push = models.ForeignKey(PlannedPush, on_delete=models.CASCADE)
    user = models.ForeignKey('users.User', on_delete=models.CASCADE)
    status = models.CharField(
        max_length=55,
        choices=enums.PushStatus.choises(),
        default=enums.PushStatus.CREATED
    )
    sent_at = models.DateTimeField(null=True)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

# push/views.py

from django.http import JsonResponse
import json
from .models import PlannedPush
from .models import Push
from users.models import User
from .utils.ios_push import send_push_to_ios

def create_push(request):
    data = json.loads(request.body)
    try:
        planned_push = PlannedPush.objects.create(
            title=data['title'],
            body=data['body'],
            is_promo=data['is_promo']
        )
    except KeyError as e:
        print(e)
        return JsonResponse({'error': 'missing required field'}, status=status.HTTP_400_BAD_REQUEST)

    return JsonResponse({'id': planned_push.id}, status=status.HTTP_201_CREATED)

def send_push(request):
    data = json.loads(request.body)
    try:
        planned_push = PlannedPush.objects.get(id=data['planned_push_id'])
    except PlannedPush.DoesNotExist:
        return JsonResponse({'error': 'planned push not found'}, status=status.HTTP_404_NOT_FOUND)

    users = User.objects.all()
    for user in users:
        if not user.user_settings_set.first().push_enabled:
            continue
        push = Push.objects.create(
            planned_push=planned_push,
            user=user
        )
        for device in user.devices_set.filter(device_type='ios'):
            try:
                is_sent = send_push_to_ios(device, push.planned_push.title, push.planned_push.body)
            except Exception as e:
                print(e)
                push.status = enums.PushStatus.ERROR
                push.save()
                continue
            if is_sent:
                push.status = enums.PushStatus.SENT
                push.sent_at = timezone.now()
                push.save()
                break

    planned_push.status = enums.PushStatus.SENT

    return JsonResponse({'status': 'ok'}, status=status.HTTP_200_OK)