add new model and change offer models

core/apps/counterparty/serializers/counterparty.py

@@ -0,0 +1,14 @@
+from rest_framework import serializers
+
+from core.apps.accounts.serializers.user import UserListSerializer
+from core.apps.counterparty.models import Counterparty
+
+
+class CounterpartySerializer(serializers.ModelSerializer):
+    person = UserListSerializer()
+    
+    class Meta:
+        model = Counterparty
+        fields = [
+            'id', 'name', 'type', 'status', 'description', 'start_date', 'person'
+        ]