Use some common fields in every django modal

AbstructModel.py

from django.db import models

class AbstractDateTime(models.Model):
    '''
    Abstract model for created_on and updated_on field in models
    '''

    created_on = models.DateTimeField(auto_now_add=True)
    updated_on = models.DateTimeField(auto_now=True)

    class Meta:
        abstract = True


class ModalName(AbstractDateTime):
	a = models.CharField(max_length=50, null=True, blank=True)
  
  class Meta:
		db_table = 'ocean_fcl_rate'