Django REST - Resolving Foreign Keys and M2M's in a Serializer - json

Question

I have the following Models:
class Player(models.Model):
name = models.CharField(max_length=30)
class Achievement(models.Model):
name = models.CharField(max_length=30)
class UnlockedAchievement(models.Model):
achievement = models.ForeignKey(Achievement)
date = models.DateTimeField()
class PlayerAchievements(models.Model):
player = models.ForeignKey(Player)
unlocked_achievements = models.ManyToManyField(UnlockedAchievement, related_name="unlocked_achievements", blank=True, null=True)
With a PUT, I'm trying to resolve both the Player's foreign key as well as the nested relationship of all the Achievements. My JSON data effectively looks like this:
{"name":"playername",
"achievements":
{
"ach1":"timestamp",
"ach2":"timestamp",
}
}
What I can't figure out is the magic combination of which kinds of Serializers to use and, when using them, which serializer fields or nested Serializers to use to be able to resolve Players by name, and the unlocked achievements (and then their Achievement foreign keys) by providing a name.
In this case I don't have access to id numbers, hence why things are done by names.
Such a strange mixture it seems. Can anyone lend a hand? Thanks in advance!

Answer 1

You can use nested relationships to fully include the serialization of a related model:
class AchievementSerializer(serializers.ModelSerializer):
class Meta:
model = Achievement
class UnlockedAchievementSerializer(serializers.ModelSerializer):
achievement = AchievementSerializer(many=False)
class Meta:
model = UnlockedAchievement
class PlayerAchievementsSerializer(serializers.ModelSerializer):
unlocked_achievements = UnlockedAchievementSerializer(many=True)
class Meta:
model = PlayerAchievements
class PlayerSerializer(serializers.ModelSerializer):
player_achievements = PlayerAchievementsSerializer(many=False)
class Meta:
model = Player
Then just filter the Player object by name and serialize it.