fix(python): lists of objects with literals now respect the custom ex…

…clude unset logic (#4752)

fern/pages/changelogs/fastapi/2024-09-26.mdx

@@ -0,0 +1,5 @@
+## 1.5.0-rc5
+**`(fix):`** Pydantic utilities now correctly handles cases where you have a Pydantic model, with a list of pydantic models as a field, where those models have literals.
+Effectively, `deep_union_pydantic_objects` now handles lists of objects and merges them appropriately.
+
+

fern/pages/changelogs/pydantic/2024-09-26.mdx

@@ -0,0 +1,5 @@
+## 1.4.7-rc1
+**`(fix):`** Pydantic utilities now correctly handles cases where you have a Pydantic model, with a list of pydantic models as a field, where those models have literals.
+Effectively, `deep_union_pydantic_objects` now handles lists of objects and merges them appropriately.
+
+

fern/pages/changelogs/python-sdk/2024-09-26.mdx

@@ -0,0 +1,5 @@
+## 4.2.7-rc2
+**`(fix):`** Pydantic utilities now correctly handles cases where you have a Pydantic model, with a list of pydantic models as a field, where those models have literals.
+Effectively, `deep_union_pydantic_objects` now handles lists of objects and merges them appropriately.
+
+

generators/python/core_utilities/shared/pydantic_utilities.py

@@ -178,13 +178,33 @@ def dict(self, **kwargs: typing.Any) -> typing.Dict[str, typing.Any]:
         return convert_and_respect_annotation_metadata(object_=dict_dump, annotation=self.__class__, direction="write")
 
 
+def _union_list_of_pydantic_dicts(
+    source: typing.List[typing.Any], destination: typing.List[typing.Any]
+) -> typing.List[typing.Any]:
+    converted_list: typing.List[typing.Any] = []
+    for i, item in enumerate(source):
+        destination_value = destination[i]  # type: ignore
+        if isinstance(item, dict):
+            converted_list.append(deep_union_pydantic_dicts(item, destination_value))
+        elif isinstance(item, list):
+            converted_list.append(_union_list_of_pydantic_dicts(item, destination_value))
+        else:
+            converted_list.append(item)
+    return converted_list
+
+
 def deep_union_pydantic_dicts(
     source: typing.Dict[str, typing.Any], destination: typing.Dict[str, typing.Any]
 ) -> typing.Dict[str, typing.Any]:
     for key, value in source.items():
+        node = destination.setdefault(key, {})
         if isinstance(value, dict):
-            node = destination.setdefault(key, {})
             deep_union_pydantic_dicts(value, node)
+        # Note: we do not do this same processing for sets given we do not have sets of models
+        # and given the sets are unordered, the processing of the set and matching objects would
+        # be non-trivial.
+        elif isinstance(value, list):
+            destination[key] = _union_list_of_pydantic_dicts(value, node)
         else:
             destination[key] = value
 

generators/python/core_utilities/shared/with_pydantic_aliases/pydantic_utilities.py

@@ -147,13 +147,33 @@ def dict(self, **kwargs: typing.Any) -> typing.Dict[str, typing.Any]:
             return super().dict(**kwargs_with_defaults_exclude_unset_include_fields)
 
 
+def _union_list_of_pydantic_dicts(
+    source: typing.List[typing.Any], destination: typing.List[typing.Any]
+) -> typing.List[typing.Any]:
+    converted_list: typing.List[typing.Any] = []
+    for i, item in enumerate(source):
+        destination_value = destination[i]  # type: ignore
+        if isinstance(item, dict):
+            converted_list.append(deep_union_pydantic_dicts(item, destination_value))
+        elif isinstance(item, list):
+            converted_list.append(_union_list_of_pydantic_dicts(item, destination_value))
+        else:
+            converted_list.append(item)
+    return converted_list
+
+
 def deep_union_pydantic_dicts(
     source: typing.Dict[str, typing.Any], destination: typing.Dict[str, typing.Any]
 ) -> typing.Dict[str, typing.Any]:
     for key, value in source.items():
+        node = destination.setdefault(key, {})
         if isinstance(value, dict):
-            node = destination.setdefault(key, {})
             deep_union_pydantic_dicts(value, node)
+        # Note: we do not do this same processing for sets given we do not have sets of models
+        # and given the sets are unordered, the processing of the set and matching objects would
+        # be non-trivial.
+        elif isinstance(value, list):
+            destination[key] = _union_list_of_pydantic_dicts(value, node)
         else:
             destination[key] = value
 

generators/python/fastapi/versions.yml

@@ -1,4 +1,12 @@
-# For unreleased changes, use unreleased.yml
+# For unreleased changes, use unreleased.yml 
+- version: 1.5.0-rc5
+  irVersion: 53
+  changelogEntry:
+    - type: fix
+      summary: |
+        Pydantic utilities now correctly handles cases where you have a Pydantic model, with a list of pydantic models as a field, where those models have literals.
+        Effectively, `deep_union_pydantic_objects` now handles lists of objects and merges them appropriately.
+
 - version: 1.5.0-rc4
   irVersion: 53
   changelogEntry:

generators/python/pydantic/versions.yml

@@ -1,4 +1,12 @@
 # For unreleased changes, use unreleased.yml
+- version: 1.4.7-rc1
+  irVersion: 53
+  changelogEntry:
+    - type: fix
+      summary: |
+        Pydantic utilities now correctly handles cases where you have a Pydantic model, with a list of pydantic models as a field, where those models have literals.
+        Effectively, `deep_union_pydantic_objects` now handles lists of objects and merges them appropriately.
+
 - version: 1.4.7-rc0
   irVersion: 53
   changelogEntry:

generators/python/sdk/versions.yml

@@ -1,4 +1,12 @@
 # For unreleased changes, use unreleased.yml
+- version: 4.2.7-rc2
+  irVersion: 53
+  changelogEntry:
+    - type: fix
+      summary: |
+        Pydantic utilities now correctly handles cases where you have a Pydantic model, with a list of pydantic models as a field, where those models have literals.
+        Effectively, `deep_union_pydantic_objects` now handles lists of objects and merges them appropriately.
+
 - version: 4.2.7-rc1
   irVersion: 53
   changelogEntry: