Django change foreign key data and save - django

Question

I have two models like
class Reporter(models.Model):
first_name = models.CharField(max_length=30)
last_name = models.CharField(max_length=30)
email = models.EmailField()
class Article(models.Model):
headline = models.CharField(max_length=100)
pub_date = models.DateField()
reporter = models.ForeignKey(Reporter, on_delete=models.CASCADE)
Now for an object of Article lets say
a=Article.objects.filter(id=1)
a=a[0]
I try to change the headline and the email of the author who has written this article so I do
a.heagline = "Saving foreign key does not work"
a.reporter.email = "changed#email.com"
a.save()
This saves the Article object but does not modify the Reporter.
I explicitly have to do
a.reporter.save()
to see the changes to the reporter object. As this is a Many to One relation it should also modify the Foreign key on saving
How can I save the parent Model too by just calling the childs save method

Answer 1

You could override the save method or just create a custom method.
class Article(models.Model):
...
# Overriding save
def save(self, *args, **kwargs):
self.reporter.save()
super(Article, self).save(*args, **kwargs)
# Creating a custom method
def save_related(self):
self.reporter.save()
self.save()
I suggest you create a custom method because it doesn't introduce unexpected behavior in save()