Filtering list of elements based on a model #property in a ViewSet - Django Rest Framework - django

Question

Below is a data structure that can be accessible trough an endpoint built with Django Rest Framework:
"sites": [{
"id": 1,
"configs": [
{
"id": 1,
"subconfigs": [
{
"id": 1,
"name": "subconfig_1",
"macro_subconfigs": [1, 2]
"flag": true
},
{
"id": 2,
"name": "subconfig_2",
"macro_subconfigs": [1]
"flag": false
},
{
"id": 3,
"name": "subconfig_3",
"macro_subconfigs": [2]
"flag": false
},
],
"macro_subconfigs": [
{
"id": 1,
"flag": true,
"subconfigs": [
{
"id": 1,
"name": "subconfig_1",
"macro_subconfigs": [1, 2]
"flag": true
},
{
"id": 2,
"name": "subconfig_2",
"macro_subconfigs": [1]
"flag": false
},
],
"name": "macro_subconfig_1"
},
{
"id": 2,
"flag": false,
"subconfigs": [
{
"id": 1,
"name": "subconfig_1",
"macro_subconfigs": [1, 2]
"flag": true
},
{
"id": 3,
"name": "subconfig_3",
"macro_subconfigs": [2]
"flag": false
},
],
"name": "macro_subconfig_2"
},
]
}
]
}]
My models are the followings:
Config
class Config(TimeStampedModel):
site = models.ForeignKey("site.Site", related_name="configs")
#property
def macro_subconfigs(self):
try:
return MacroSubConfig.objects.filter(subconfigs__config__pk=self.pk).distinct()
except MacroSubConfig.DoesNotExist:
return tuple()
SubConfig
class SubConfig(TimeStampedModel):
name = models.CharField(max_length=200)
config = models.ForeignKey(
"Config", related_name="subconfigs", on_delete=models.CASCADE
)
flag = models.BooleanField(default=True)
MacroSubConfig
class MacroSubConfig(TimeStampedModel):
name = models.CharField(max_length=100)
subconfigs = models.ManyToManyField(SubConfig, related_name="macro_subconfigs")
flag = models.BooleanField(default=True)
And my serializers:
class SiteConfigSerializer(serializers.HyperlinkedModelSerializer):
configs = ConfigSerializer(many=True)
class Meta:
model = Site
fields = ("name", "configs")
class SubConfigSerializer(serializers.ModelSerializer):
class Meta:
model = SubConfig
fields = ("name")
class ConfigSerializer(serializers.ModelSerializer):
subconfigs = SubConfigSerializer(many=True)
macro_subconfigs = MacroSubConfigSerializer(many=True)
class Meta:
model = Config
fields = ("name", "subconfigs", "macro_subconfigs")
class MacroSubConfigSerializer(serializers.HyperlinkedModelSerializer):
subconfigs = serializers.PrimaryKeyRelatedField(
many=True, queryset=SubConfig.objects.all()
)
class Meta:
model = MacroSubConfig
fields = ["subconfigs", "name"]
In my SiteViewSet, I would like to filter macro_subconfigs in the macro_subconfigs's list which have flag: true. I already managed to do the same for subconfigs in the subconfigs's list.
The expected result is the following:
"sites": [{
"id": 1,
"configs": [
{
"id": 1,
"subconfigs": [
{
"id": 1,
"name": "subconfig_1",
"macro_subconfigs": [1, 2]
"flag": true
}
],
"macro_subconfigs": [
{
"id": 1,
"flag": true,
"subconfigs": [
{
"id": 1,
"name": "subconfig_1",
"macro_subconfigs": [1, 2]
"flag": true
},
{
"id": 2,
"name": "subconfig_2",
"macro_subconfigs": [1]
"flag": false
},
],
"name": "macro_subconfig_1"
}
]
}
]
}]
How do you filter elements from a list in the Config object, in the SiteViewSet?
Feel free to ask me more precisions if needed. Thanks
More infos
What I have tried in my ViewSet
class SiteConfigViewSet(PublicViewSet):
serializer_class = serializers.SiteConfigSerializer
def get_queryset(self):
subconfigs = Process.objects.filter(flag=True)
macro_subconfigs = MacroProcess.objects.filter(flag=True)
return permissions.get_allowed_sites(self.request).prefetch_related(
Prefetch("configs__subconfigs", queryset=subconfigs),
Prefetch("configs__subconfigs__macro_subconfigs", queryset=macro_subconfigs),
)