How to check for a specific field change in a model?

> > I have my models.py : > > class Hotel(models.Model): > name = models.CharField(max_length=20) > currency = models.ForeignKey(Currency) > > class Currency(models.Mode): > code = models.CharField(max_length=3) > name = models.CharField(max_length=10) > > > Whenever the currency field in hotel

How to check for a specific field change in a model?

I have my models.py : class Hotel(models.Model): name = models.CharField(max_length=20) currency = models.ForeignKey(Currency) class Currency(models.Mode): code = models.CharField(max_length=3) name = models.CharField(max_length=10) Whenever the currency field in hotel is chang