जब मैं पाइथन मैनेज.पी मेकमाइग्रेशन और माइग्रेट को उत्साहित करता हूं तो कोई बदलाव नहीं पाया गया

प्रोग्राम abstract = True . को हटाकर काम करता है जब मैं python manage.py makemigrations tithe चलाता हूं, तो इसे हटाने के बाद कक्षा मेटा में। और python manage.py migrate tithe यह अच्छी तरह से काम करता है

from __future__ import unicode_literals
from django.utils import timezone
from django.contrib.auth.models import User
from django.conf import settings
from django.contrib.auth import get_user_model
from django.core.signals import setting_changed
from django.dispatch import receiver
from django.db import models

# Create your models here.
class tithe(models.Model):
    member_code = models.ForeignKey(settings.AUTH_USER_MODEL)
    member = models.CharField(max_length=45)
    receipt_code = models.CharField(max_length=45, unique=True)
    tithes = models.IntegerField()
    combinedoffering = models.IntegerField()
    campmeetingoffering = models.IntegerField()
    churchbuilding = models.IntegerField()
    conference = models.IntegerField()
    localchurch = models.IntegerField()
    funds = models.IntegerField()
    total = models.IntegerField()
    created_date = models.DateTimeField(
            default=timezone.now)
    published_date = models.DateTimeField(
            blank=True, null=True)

    def publish(self):
        self.published_date = timezone.now()
        self.save()

    def __str__(self):
        return self.receitcode

    class Meta:
        unique_together = ["receipt_code"]