Handling different levels of nesting in Django REST Framework

For example, if you take the following model:

class Region(models.Model):
    id = models.AutoField(primary_key=True)
    name = models.CharField(max_length=256)

class Company(models.Model):
    id = models.AutoField(primary_key=True)
    name = models.CharField(max_length=256)
    region = models.ForeignKey('Region', db_index=True)

class Staff(models.Model):
    id = models.AutoField(primary_key=True)
    name = models.CharField(max_length=256)
    company = models.ForeignKey('Company', db_index=True)

I know I don't need to include the id in these models, but I did it to make it clearer.

In this example, sometimes you just want to simply return a list of regions. Other times, you want to return a list of regions and a list of companies in each region under each region.

You also need more details, I guess, where you can find a list of regions, their company subsidiaries, and each company's employee subsidiaries.

As far as the rest of the frame views are concerned, what is the best way to handle these different levels of depth/detail. How do people usually deal with it?

I mean, what naming convention would you use when you say three views return the same content at the top level, the only difference is how many levels of nesting they contain?