Read-write property field on a ModelSerializer

[Kal Sze]

Is there an elegant way to create a read-write property field on a
ModelSerializer?

What I mean is that I have Django models like these:

# foobar/models.py
from django.db import models


class Foo(models.Model):
name = models.TextField(unique=True)


class Bar(models.Model):
name = models.TextField(unique=True)
foo = models.ForeignKey(Foo)

I want to expose the Bar model via DRF:

from rest_framework import serializers

from foobar.models import Bar


class BarSerializer(serializers.HyperlinkedModelSerializer):
class Meta:
model = Bar
fields = ('url', 'id', 'name', 'foo_name')

foo_name = serializers.?????

The point is that I don't want to expose the whole Foo model via DRF.

I want to be able to supply just a foo_name when creating or updating a Bar
instance via DRF, and I want DRF to resolve foo_name to a Foo instance by
doing `Foo.objects.get(name=foo_name)`.

Similarly, when DRF returns the resource to the client I want it to output
`foo_name=bar.foo.name`.

It's quite hard to change the `Bar` model so that `foo_name` works
transparently at every level: I would need to override `Bar.__init__`,
`BarManager.get_or_create`, `BarManager.update_or_create`,
`BarManager.create`, etc. I would also need to somehow monkey-patch or
override the `QuerySet` from `BarManager`.