Revert "(fix): inline discriminated union props" (#3408)

* Revert "(fix, python): inline discriminated union props (#3404)"

This reverts commit f5b73f6.

* Update VERSION

generators/python/sdk/CHANGELOG.md

@@ -5,32 +5,6 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [1.2.0-rc1] - 2024-04-04
-
-- Fix: Discriminated union variants that are objects now have inlined properties instead of 
-  extending a base type. 
-
-  ```python
-
-  Circle_Shape(pydantic_v1.BaseModel): 
-    type: typing.Literal["circle"]
-    radius: integer
-
-  Square_Shape(pydantic_v1.BaseModel): 
-    type: typing.Literal["circle"]
-    side: integer
-  ```
-
-  instead of 
-
-  ```python
-  Circle_Shape(Circle): 
-    type: typing.Literal["circle"]
-
-  Square_Shape(Square): 
-    type: typing.Literal["circle"]
-  ```
-
 ## [1.2.0-rc0] - 2024-04-04
 
 - Feature: The generator now depends on v38 of Intermediate Representation which requires the latest 

generators/python/src/fern_python/generators/pydantic_model/type_declaration_handler/discriminated_union/simple_discriminated_union_generator.py

@@ -80,7 +80,15 @@ def generate(self) -> None:
                 )
 
         for single_union_type in self._union.types:
+            single_union_type_base = single_union_type.shape.visit(
+                same_properties_as_object=lambda type_name: type_name,
+                single_property=lambda property_: None,
+                no_properties=lambda: None,
+            )
             base_models = []
+            if single_union_type_base is not None:
+                base_models.append(self._context.get_class_reference_for_type_id(single_union_type_base.type_id))
+                all_referenced_types.append(ir_types.TypeReference.factory.named(single_union_type_base))
 
             if class_reference_for_base is not None:
                 base_models.append(class_reference_for_base)
@@ -117,19 +125,6 @@ def generate(self) -> None:
                         )
                     )
                     all_referenced_types.append(shape.type)
-                elif shape.properties_type == "samePropertiesAsObject":
-                    object_properties = self._context.get_all_properties_including_extensions(shape.type_id)
-                    for object_property in object_properties:
-                        internal_pydantic_model_for_single_union_type.add_field(
-                            PydanticField(
-                                name=object_property.name.name.snake_case.unsafe_name,
-                                pascal_case_field_name=object_property.name.name.pascal_case.unsafe_name,
-                                json_field_name=object_property.name.wire_value,
-                                type_hint=self._context.get_type_hint_for_type_reference(
-                                    type_reference=object_property.value_type
-                                ),
-                            )
-                        )
 
                 # if any of our fields are forward refs, we need to call
                 # update_forwards_refs()

seed/fastapi/seed.yml

@@ -30,4 +30,4 @@ allowedFailures:
   - literal
   - websocket
   - enum
-  - server-sent-events
+  - server-sent-events.