fix: Fix on demand feature view output in feast plan + Web UI crash (#3057)

* fix: Fix on demand feature view output in feast plan + Web UI crash with ODFV

Signed-off-by: Danny Chiao <danny@tecton.ai>

* lint

Signed-off-by: Danny Chiao <danny@tecton.ai>

* fix tests

Signed-off-by: Danny Chiao <danny@tecton.ai>

Signed-off-by: Danny Chiao <danny@tecton.ai>

Author: adchia

protos/feast/core/OnDemandFeatureView.proto

@@ -83,4 +83,7 @@ message UserDefinedFunction {
 
     // The python-syntax function body (serialized by dill)
     bytes body = 2;
+
+    // The string representation of the udf
+    string body_text = 3;
 }

sdk/python/feast/diff/registry_diff.py

@@ -17,6 +17,7 @@
 from feast.protos.feast.core.OnDemandFeatureView_pb2 import (
     OnDemandFeatureView as OnDemandFeatureViewProto,
 )
+from feast.protos.feast.core.OnDemandFeatureView_pb2 import OnDemandFeatureViewSpec
 from feast.protos.feast.core.RequestFeatureView_pb2 import (
     RequestFeatureView as RequestFeatureViewProto,
 )
@@ -137,19 +138,39 @@ def diff_registry_objects(
     else:
         current_spec = current_proto.spec
         new_spec = new_proto.spec
-    if current_spec != new_spec:
+    if current != new:
         for _field in current_spec.DESCRIPTOR.fields:
             if _field.name in FIELDS_TO_IGNORE:
                 continue
-            if getattr(current_spec, _field.name) != getattr(new_spec, _field.name):
-                transition = TransitionType.UPDATE
-                property_diffs.append(
-                    PropertyDiff(
-                        _field.name,
-                        getattr(current_spec, _field.name),
-                        getattr(new_spec, _field.name),
+            elif getattr(current_spec, _field.name) != getattr(new_spec, _field.name):
+                if _field.name == "user_defined_function":
+                    current_spec = cast(OnDemandFeatureViewSpec, current_proto)
+                    new_spec = cast(OnDemandFeatureViewSpec, new_proto)
+                    current_udf = current_spec.user_defined_function
+                    new_udf = new_spec.user_defined_function
+                    for _udf_field in current_udf.DESCRIPTOR.fields:
+                        if _udf_field.name == "body":
+                            continue
+                        if getattr(current_udf, _udf_field.name) != getattr(
+                            new_udf, _udf_field.name
+                        ):
+                            transition = TransitionType.UPDATE
+                            property_diffs.append(
+                                PropertyDiff(
+                                    _field.name + "." + _udf_field.name,
+                                    getattr(current_udf, _udf_field.name),
+                                    getattr(new_udf, _udf_field.name),
+                                )
+                            )
+                else:
+                    transition = TransitionType.UPDATE
+                    property_diffs.append(
+                        PropertyDiff(
+                            _field.name,
+                            getattr(current_spec, _field.name),
+                            getattr(new_spec, _field.name),
+                        )
                     )
-                )
     return FeastObjectDiff(
         name=new_spec.name,
         feast_object_type=object_type,

sdk/python/feast/on_demand_feature_view.py

@@ -61,12 +61,12 @@ class OnDemandFeatureView(BaseFeatureView):
             maintainer.
     """
 
-    # TODO(adchia): remove inputs from proto and declaration
     name: str
     features: List[Field]
     source_feature_view_projections: Dict[str, FeatureViewProjection]
     source_request_sources: Dict[str, RequestSource]
     udf: FunctionType
+    udf_string: str
     description: str
     tags: Dict[str, str]
     owner: str
@@ -81,6 +81,7 @@ def __init__(  # noqa: C901
             List[Any]
         ] = None,  # Typed as Any because @typechecked can't deal with the List[Union]
         udf: Optional[FunctionType] = None,
+        udf_string: str = "",
         inputs: Optional[
             Dict[str, Union[FeatureView, FeatureViewProjection, RequestSource]]
         ] = None,
@@ -99,8 +100,9 @@ def __init__(  # noqa: C901
             sources (optional): A map from input source names to the actual input sources,
                 which may be feature views, or request data sources.
                 These sources serve as inputs to the udf, which will refer to them by name.
-            udf (optional): The user defined transformation function, which must take pandas
+            udf: The user defined transformation function, which must take pandas
                 dataframes as inputs.
+            udf_string: The source code version of the udf (for diffing and displaying in Web UI)
             inputs (optional): (Deprecated) A map from input source names to the actual input sources,
                 which may be feature views, feature view projections, or request data sources.
                 These sources serve as inputs to the udf, which will refer to them by name.
@@ -233,9 +235,8 @@ def __init__(  # noqa: C901
                     odfv_source.name
                 ] = odfv_source.projection
 
-        if _udf is None:
-            raise ValueError("The `udf` parameter must be specified.")
-        self.udf = _udf  # type: ignore
+        self.udf = udf  # type: ignore
+        self.udf_string = udf_string
 
     @property
     def proto_class(self) -> Type[OnDemandFeatureViewProto]:
@@ -249,6 +250,7 @@ def __copy__(self):
             sources=list(self.source_feature_view_projections.values())
             + list(self.source_request_sources.values()),
             udf=self.udf,
+            udf_string=self.udf_string,
             description=self.description,
             tags=self.tags,
             owner=self.owner,
@@ -269,6 +271,7 @@ def __eq__(self, other):
             self.source_feature_view_projections
             != other.source_feature_view_projections
             or self.source_request_sources != other.source_request_sources
+            or self.udf_string != other.udf_string
             or self.udf.__code__.co_code != other.udf.__code__.co_code
         ):
             return False
@@ -305,7 +308,9 @@ def to_proto(self) -> OnDemandFeatureViewProto:
             features=[feature.to_proto() for feature in self.features],
             sources=sources,
             user_defined_function=UserDefinedFunctionProto(
-                name=self.udf.__name__, body=dill.dumps(self.udf, recurse=True),
+                name=self.udf.__name__,
+                body=dill.dumps(self.udf, recurse=True),
+                body_text=self.udf_string,
             ),
             description=self.description,
             tags=self.tags,
@@ -354,6 +359,7 @@ def from_proto(cls, on_demand_feature_view_proto: OnDemandFeatureViewProto):
             udf=dill.loads(
                 on_demand_feature_view_proto.spec.user_defined_function.body
             ),
+            udf_string=on_demand_feature_view_proto.spec.user_defined_function.body_text,
             description=on_demand_feature_view_proto.spec.description,
             tags=dict(on_demand_feature_view_proto.spec.tags),
             owner=on_demand_feature_view_proto.spec.owner,
@@ -641,6 +647,7 @@ def mainify(obj):
             obj.__module__ = "__main__"
 
     def decorator(user_function):
+        udf_string = dill.source.getsource(user_function)
         mainify(user_function)
         on_demand_feature_view_obj = OnDemandFeatureView(
             name=user_function.__name__,
@@ -650,6 +657,7 @@ def decorator(user_function):
             description=description,
             tags=tags,
             owner=owner,
+            udf_string=udf_string,
         )
         functools.update_wrapper(
             wrapper=on_demand_feature_view_obj, wrapped=user_function

sdk/python/feast/registry.py

@@ -24,7 +24,6 @@
 from typing import Any, Dict, List, Optional
 from urllib.parse import urlparse
 
-import dill
 from google.protobuf.internal.containers import RepeatedCompositeFieldContainer
 from google.protobuf.json_format import MessageToJson
 from proto import Message
@@ -729,9 +728,10 @@ def to_dict(self, project: str) -> Dict[str, List[Any]]:
             key=lambda on_demand_feature_view: on_demand_feature_view.name,
         ):
             odfv_dict = self._message_to_sorted_dict(on_demand_feature_view.to_proto())
-            odfv_dict["spec"]["userDefinedFunction"]["body"] = dill.source.getsource(
-                on_demand_feature_view.udf
-            )
+
+            odfv_dict["spec"]["userDefinedFunction"][
+                "body"
+            ] = on_demand_feature_view.udf_string
             registry_dict["onDemandFeatureViews"].append(odfv_dict)
         for request_feature_view in sorted(
             self.list_request_feature_views(project=project),

sdk/python/tests/integration/feature_repos/universal/feature_views.py

@@ -88,6 +88,7 @@ def conv_rate_plus_100_feature_view(
         schema=[] if infer_features else _features,
         sources=sources,
         udf=conv_rate_plus_100,
+        udf_string="raw udf source",
     )
 
 
@@ -125,6 +126,7 @@ def similarity_feature_view(
         sources=sources,
         schema=[] if infer_features else _fields,
         udf=similarity,
+        udf_string="similarity raw udf",
     )
 
 

sdk/python/tests/unit/test_on_demand_feature_view.py

@@ -57,6 +57,7 @@ def test_hash():
             Field(name="output2", dtype=Float32),
         ],
         udf=udf1,
+        udf_string="udf1 source code",
     )
     on_demand_feature_view_2 = OnDemandFeatureView(
         name="my-on-demand-feature-view",
@@ -66,6 +67,7 @@ def test_hash():
             Field(name="output2", dtype=Float32),
         ],
         udf=udf1,
+        udf_string="udf1 source code",
     )
     on_demand_feature_view_3 = OnDemandFeatureView(
         name="my-on-demand-feature-view",
@@ -75,6 +77,7 @@ def test_hash():
             Field(name="output2", dtype=Float32),
         ],
         udf=udf2,
+        udf_string="udf2 source code",
     )
     on_demand_feature_view_4 = OnDemandFeatureView(
         name="my-on-demand-feature-view",
@@ -84,6 +87,7 @@ def test_hash():
             Field(name="output2", dtype=Float32),
         ],
         udf=udf2,
+        udf_string="udf2 source code",
         description="test",
     )