Fix nested pydantic model issue (#1905)

* Fix nested pydantic model issue

* fix failing tests

* add in vcr

* cleanup

* drop prints

* Fix vcr issues

* added new recordings

* trying to fix vcr

* add in fix from lorenze.

tests/utilities/test_pydantic_schema_parser.py

@@ -0,0 +1,94 @@
+from typing import Any, Dict, List, Optional, Set, Tuple, Union
+
+import pytest
+from pydantic import BaseModel, Field
+
+from crewai.utilities.pydantic_schema_parser import PydanticSchemaParser
+
+
+def test_simple_model():
+    class SimpleModel(BaseModel):
+        field1: int
+        field2: str
+
+    parser = PydanticSchemaParser(model=SimpleModel)
+    schema = parser.get_schema()
+
+    expected_schema = """{
+    field1: int,
+    field2: str
+}"""
+    assert schema.strip() == expected_schema.strip()
+
+
+def test_nested_model():
+    class NestedModel(BaseModel):
+        nested_field: int
+
+    class ParentModel(BaseModel):
+        parent_field: str
+        nested: NestedModel
+
+    parser = PydanticSchemaParser(model=ParentModel)
+    schema = parser.get_schema()
+
+    expected_schema = """{
+    parent_field: str,
+    nested: NestedModel
+    {
+        nested_field: int
+    }
+}"""
+    assert schema.strip() == expected_schema.strip()
+
+
+def test_model_with_list():
+    class ListModel(BaseModel):
+        list_field: List[int]
+
+    parser = PydanticSchemaParser(model=ListModel)
+    schema = parser.get_schema()
+
+    expected_schema = """{
+    list_field: List[int]
+}"""
+    assert schema.strip() == expected_schema.strip()
+
+
+def test_model_with_optional_field():
+    class OptionalModel(BaseModel):
+        optional_field: Optional[str]
+
+    parser = PydanticSchemaParser(model=OptionalModel)
+    schema = parser.get_schema()
+
+    expected_schema = """{
+    optional_field: Optional[str]
+}"""
+    assert schema.strip() == expected_schema.strip()
+
+
+def test_model_with_union():
+    class UnionModel(BaseModel):
+        union_field: Union[int, str]
+
+    parser = PydanticSchemaParser(model=UnionModel)
+    schema = parser.get_schema()
+
+    expected_schema = """{
+    union_field: Union[int, str]
+}"""
+    assert schema.strip() == expected_schema.strip()
+
+
+def test_model_with_dict():
+    class DictModel(BaseModel):
+        dict_field: Dict[str, int]
+
+    parser = PydanticSchemaParser(model=DictModel)
+    schema = parser.get_schema()
+
+    expected_schema = """{
+    dict_field: Dict[str, int]
+}"""
+    assert schema.strip() == expected_schema.strip()