from django.db import models import reversion # Create your models here. class Suppliers(models.Model): name = models.CharField(max_length=100) address = models.TextField() phone = models.CharField(max_length=13, null=True, blank=True) company_number = models.IntegerField() class AbstractAsset(object): purchase_cost = models.DecimalField(max_digits=10, decimal_places=2) purchase_date = models.DateField(blank=True, null=True)