jambo/parser/float_type_parser.py

@@ -1,5 +1,7 @@
 from jambo.parser._type_parser import GenericTypeParser
-from jambo.utils.properties_builder.numeric_properties_builder import numeric_properties_builder
+from jambo.utils.properties_builder.numeric_properties_builder import (
+    numeric_properties_builder,
+)
 
 
 class FloatTypeParser(GenericTypeParser):

jambo/parser/int_type_parser.py

@@ -1,5 +1,7 @@
 from jambo.parser._type_parser import GenericTypeParser
-from jambo.utils.properties_builder.numeric_properties_builder import numeric_properties_builder
+from jambo.utils.properties_builder.numeric_properties_builder import (
+    numeric_properties_builder,
+)
 
 
 class IntTypeParser(GenericTypeParser):

jambo/parser/object_type_parser.py

@@ -10,10 +10,12 @@ class ObjectTypeParser(GenericTypeParser):
     def from_properties(name, properties):
         from jambo.schema_converter import SchemaConverter
 
-        if "default" in properties:
-            raise RuntimeError("Default values for objects are not supported.")
+        type_parsing = SchemaConverter.build_object(name, properties)
+        type_properties = {}
 
-        return (
-            SchemaConverter.build_object(name, properties),
-            {},  # The second argument is not used in this case
+        if "default" in properties:
+            type_properties["default_factory"] = lambda: type_parsing.model_validate(
+                properties["default"]
             )
+
+        return type_parsing, type_properties

jambo/schema_converter.py

@@ -1,13 +1,11 @@
 from jambo.parser import GenericTypeParser
+from jambo.types.json_schema_type import JSONSchema
 
 from jsonschema.exceptions import SchemaError
 from jsonschema.protocols import Validator
 from pydantic import create_model
 from pydantic.fields import Field
-
-from typing import Type
-
-from jambo.types.json_schema_type import JSONSchema
+from pydantic.main import ModelT
 
 
 class SchemaConverter:
@@ -20,7 +18,7 @@ class SchemaConverter:
     """
 
     @staticmethod
-    def build(schema: JSONSchema) -> Type:
+    def build(schema: JSONSchema) -> ModelT:
         """
         Converts a JSON Schema to a Pydantic model.
         :param schema: The JSON Schema to convert.
@@ -35,7 +33,7 @@ class SchemaConverter:
     def build_object(
         name: str,
         schema: JSONSchema,
-    ) -> Type:
+    ) -> ModelT:
         """
         Converts a JSON Schema object to a Pydantic model given a name.
         :param name:
@@ -60,7 +58,7 @@ class SchemaConverter:
     @staticmethod
     def _build_model_from_properties(
         model_name: str, model_properties: dict, required_keys: list[str]
-    ) -> Type:
+    ) -> ModelT:
         properties = SchemaConverter._parse_properties(model_properties, required_keys)
 
         return create_model(model_name, **properties)

pyproject.toml

@@ -66,3 +66,4 @@ section-order=[
     "third-party",
     "standard-library",
 ]
+lines-after-imports = 2

tests/parser/test_object_type_parser.py

@@ -21,3 +21,29 @@ class TestObjectTypeParser(TestCase):
 
         self.assertEqual(obj.name, "name")
         self.assertEqual(obj.age, 10)
+
+    def test_object_type_parser_with_default(self):
+        parser = ObjectTypeParser()
+
+        properties = {
+            "type": "object",
+            "properties": {
+                "name": {"type": "string"},
+                "age": {"type": "integer"},
+            },
+            "default": {
+                "name": "default_name",
+                "age": 20,
+            },
+        }
+
+        _, type_validator = parser.from_properties("placeholder", properties)
+
+        # Check default value
+        default_obj = type_validator["default_factory"]()
+        self.assertEqual(default_obj.name, "default_name")
+        self.assertEqual(default_obj.age, 20)
+
+        # Chekc default factory new object id
+        new_obj = type_validator["default_factory"]()
+        self.assertNotEqual(id(default_obj), id(new_obj))

tests/test_schema_converter.py

@@ -256,3 +256,28 @@ class TestSchemaConverter(TestCase):
         model_set = SchemaConverter.build(schema_set)
 
         self.assertEqual(model_set().friends, {"John", "Jane"})
+
+    def test_default_for_object(self):
+        schema = {
+            "title": "Person",
+            "description": "A person",
+            "type": "object",
+            "properties": {
+                "address": {
+                    "type": "object",
+                    "properties": {
+                        "street": {"type": "string"},
+                        "city": {"type": "string"},
+                    },
+                    "default": {"street": "123 Main St", "city": "Springfield"},
+                },
+            },
+            "required": ["address"],
+        }
+
+        model = SchemaConverter.build(schema)
+
+        obj = model(address={"street": "123 Main St", "city": "Springfield"})
+
+        self.assertEqual(obj.address.street, "123 Main St")
+        self.assertEqual(obj.address.city, "Springfield")