diff --git a/capyc/django/serializer.py b/capyc/django/serializer.py
index 3eb052da6..67aefc53c 100644
--- a/capyc/django/serializer.py
+++ b/capyc/django/serializer.py
@@ -1,4 +1,5 @@
 import base64
+import re
 from collections.abc import Iterable, Mapping
 from copy import copy
 from datetime import datetime, timedelta
@@ -171,10 +172,41 @@ def get_cache(key: Optional[str] = None) -> dict[str, ModelCached] | ModelCached
 
 class ModelFieldMixin:
     depth = 1
-    request = None
+    request: Optional[HttpRequest | AsyncRequest] = None
     model: Optional[models.Model] = None
     fields = {"default": tuple()}
-    # exclude = ()
+
+    @classmethod
+    def _get_args(cls, key: str) -> dict[str, Any]:
+        if cls.request is None:
+            return {}
+
+        expands = cls.request.GET.get("expand", "")
+        if not expands:
+            return {}
+
+        result = re.findall(r"[\w]+\[.*?\]|[\w]+", expands)
+        res = {}
+        for item in result:
+            paths = item.split(".")
+            head = res
+            for path in paths[:-1]:
+                if path not in head:
+                    head[path] = {}
+
+                head = head[path]
+
+            item = item[-1]
+
+            if "[" in item and "]" in item:
+                fields = item.replace("]", "").split("[")
+
+                head[fields[0]] = {"_sets": fields[1].split(",")}
+
+            else:
+                head[item] = {"_sets": []}
+
+        return res
 
     @classmethod
     def _get_related_fields(cls, key: str):
@@ -307,7 +339,9 @@ def _serialize(self, instance: models.Model) -> dict:
                     if isinstance(data[field], Collection):
                         many = True
 
-                    data[field] = ser(data=data[field], many=many).data
+                    ser.init(data=data[field], many=many)
+
+                    data[field] = ser.data
                 else:
                     data[field] = pk_serializer(data[field])
 
@@ -371,6 +405,7 @@ def __init__(
         request: Optional[HttpRequest | AsyncRequest] = None,
         sets: Optional[Collection[str]] = None,
         expand: Optional[Collection[str]] = None,
+        link: Optional[str] = None,
         **kwargs,
     ):
         if sets is not None:
@@ -378,6 +413,23 @@ def __init__(
         else:
             self._parsed_fields = set()
 
+        self.init(instance, many, data, context, required, request, expand, link)
+
+        super().__init__(**kwargs)
+
+    def init(
+        self,
+        instance: Optional[QuerySet | models.Model] = None,
+        many: bool = False,
+        data: Optional[Iterable | Mapping | QuerySet | models.Model] = None,
+        context: Optional[Mapping] = None,
+        required: bool = True,
+        request: Optional[HttpRequest | AsyncRequest] = None,
+        expand: Optional[Collection[str]] = None,
+        link: Optional[str] = None,
+    ) -> None:
+        self.link = link
+
         if expand is not None:
             self._expands = set(expand)
         else:
@@ -391,5 +443,3 @@ def __init__(
         self.context = context or {}
         self.required = required
         self.request = request
-
-        super().__init__(**kwargs)
diff --git a/capyc/tests/django/tests_serializer.py b/capyc/tests/django/tests_serializer.py
index 5a6906694..a24f6aef7 100644
--- a/capyc/tests/django/tests_serializer.py
+++ b/capyc/tests/django/tests_serializer.py
@@ -1,11 +1,35 @@
 import pytest
 from rest_framework.test import APIRequestFactory
 
-from breathecode.admissions.models import Academy, Cohort
+from breathecode.admissions.models import Academy, Cohort, Country
+from breathecode.payments.models import Currency
 from breathecode.tests.mixins.breathecode_mixin.breathecode import Breathecode
 from capyc.django.serializer import Serializer
 
 
+class CountrySerializer(Serializer):
+    model = Country
+    fields = {
+        "default": ("code",),
+        "info": ("name",),
+    }
+    filters = ("code", "name")
+    depth = 2
+
+
+class CurrencySerializer(Serializer):
+    model = Currency
+    fields = {
+        "default": ("id", "code"),
+        "info": ("name", "decimals"),
+        "list": ("countries",),
+    }
+    filters = ("slug", "name")
+    depth = 2
+
+    countries = CountrySerializer(many=True)
+
+
 class AcademySerializer(Serializer):
     model = Academy
     fields = {
@@ -16,6 +40,8 @@ class AcademySerializer(Serializer):
     filters = ("slug", "name")
     depth = 2
 
+    country = CountrySerializer(many=True)
+
 
 class CohortSerializer(Serializer):
     model = Cohort
@@ -27,7 +53,8 @@ class CohortSerializer(Serializer):
     filters = ("slug", "name", "academy__*")
     depth = 2
 
-    academy = AcademySerializer
+    academy = AcademySerializer()
+    # academy = AcademySerializer(sets=["available_as_saas"])
 
 
 @pytest.fixture(autouse=True)
@@ -158,7 +185,7 @@ async def test_two_sets_expanded___(bc: Breathecode):
     model = await bc.database.acreate(cohort=2)
 
     factory = APIRequestFactory()
-    request = factory.get("/notes/547/?sets=intro,ids&expand=academy[contact,saas],syllabus_version")
+    request = factory.get("/notes/547/?sets=intro,ids,academy[contact,saas]&expand=academy,syllabus_version")
 
     qs = Cohort.objects.all()
     serializer = CohortSerializer(data=qs, many=True, request=request)
@@ -183,3 +210,36 @@ async def test_two_sets_expanded___(bc: Breathecode):
         }
         for x in model.cohort
     ]
+
+
+# @pytest.mark.asyncio
+# @pytest.mark.django_db(reset_sequences=True)
+# async def test_two_sets_expanded___(bc: Breathecode):
+#     model = await bc.database.acreate(cohort=2)
+
+#     factory = APIRequestFactory()
+#     request = factory.get("/notes/547/?sets=intro,ids&expand=academy[contact,saas],syllabus_version")
+
+#     qs = Cohort.objects.all()
+#     serializer = CohortSerializer(data=qs, many=True, request=request)
+
+#     assert await serializer.adata == [
+#         {
+#             "id": x.id,
+#             "slug": x.slug,
+#             "name": x.name,
+#             "intro_video": x.intro_video,
+#             "available_as_saas": x.available_as_saas,
+#             "academy": {
+#                 "id": x.academy.id,
+#                 "name": x.academy.name,
+#                 "slug": x.academy.slug,
+#                 "street_address": x.academy.street_address,
+#                 "feedback_email": x.academy.feedback_email,
+#                 "available_as_saas": x.academy.available_as_saas,
+#                 "is_hidden_on_prework": x.academy.is_hidden_on_prework,
+#             },
+#             "syllabus_version": None,
+#         }
+#         for x in model.cohort
+#     ]