initial rasaddam backend project

common/serializers.py

@@ -0,0 +1,43 @@
+from typing import List
+
+from rest_framework.request import Request
+from rest_framework.serializers import ModelSerializer, Serializer
+
+
+class DynamicFieldsModelSerializer(ModelSerializer):
+    """
+    A ModelSerializer that takes an additional `fields` argument that
+    controls which fields should be displayed.
+    """
+
+    def __init__(self, *args, **kwargs):
+        # Don't pass the 'fields' arg up to the superclass
+        fields = kwargs.pop("fields", None)
+
+        # Instantiate the superclass normally
+        super().__init__(*args, **kwargs)
+
+        if fields is not None:
+            # Drop any fields that are not specified in the `fields` argument.
+            allowed = set(fields)
+            existing = set(self.fields)
+            for field_name in existing - allowed:
+                self.fields.pop(field_name)
+
+
+def create_validated_instance(serializer: Serializer, request: Request):
+    serializer = serializer(data=request.data, context={"request": request})
+    serializer.is_valid(raise_exception=True)
+    return serializer.save(), serializer.validated_data
+
+
+def get_validated_data(
+    serializer: Serializer, request: Request, fields: List[str] = None
+):
+    if fields and issubclass(serializer, DynamicFieldsModelSerializer):
+        serializer = serializer(fields=fields, data=request.data)
+    else:
+        serializer = serializer(data=request.data)
+
+    serializer.is_valid(raise_exception=True)
+    return serializer.validated_data