initial commit

core/serializers/base.py

@@ -0,0 +1,57 @@
+from django.contrib.auth import get_user_model
+from drf_spectacular.utils import extend_schema_field
+from rest_framework import serializers
+
+from core.serializers.mini import UserMiniSerializer
+
+User = get_user_model()
+
+
+class BaseModelSerializer(serializers.ModelSerializer):
+    """
+    Base serializer for all models inheriting from BaseModel.
+    Returns audit fields with a nested user mini representation.
+    """
+
+    id = serializers.UUIDField(read_only=True)
+    created_by = UserMiniSerializer(read_only=True)
+    updated_by = UserMiniSerializer(read_only=True)
+    created_at = serializers.SerializerMethodField()
+    updated_at = serializers.SerializerMethodField()
+    can_delete = serializers.SerializerMethodField()
+
+    class Meta:
+        model = None
+        fields = (
+            "id",
+            "created_by",
+            "updated_by",
+            "created_at",
+            "updated_at",
+            "can_delete",
+        )
+        read_only_fields = fields
+
+    def to_internal_value(self, data):
+        if isinstance(data, dict):
+            data = data.copy()
+            for name, field in self.fields.items():
+                if (
+                    name in data
+                    and data[name] is None
+                    and isinstance(field, (serializers.CharField, serializers.URLField))
+                ):
+                    data[name] = ""
+        return super().to_internal_value(data)
+
+    @extend_schema_field(serializers.CharField)
+    def get_created_at(self, obj) -> str:
+        return obj.created_at_display
+
+    @extend_schema_field(serializers.CharField)
+    def get_updated_at(self, obj) -> str:
+        return obj.updated_at_display
+
+    @extend_schema_field(serializers.BooleanField)
+    def get_can_delete(self, obj) -> bool:
+        return bool(getattr(obj, "can_delete", False))