[python-nextgen] fix optional dict in property (#15009)

* fix optional dict in property

* update samples

modules/openapi-generator/src/main/resources/python-nextgen/model_generic.mustache

@@ -220,7 +220,7 @@ class {{classname}}({{#parent}}{{{.}}}{{/parent}}{{^parent}}BaseModel{{/parent}}
             {{#isMap}}
             {{^items.isPrimitiveType}}
             {{^items.isEnumOrRef}}
-            "{{{name}}}": dict((_k, {{{dataType}}}.from_dict(_v)) for _k, _v in obj.get("{{{baseName}}}").items()){{^-last}},{{/-last}}
+            "{{{name}}}": dict((_k, {{{dataType}}}.from_dict(_v)) for _k, _v in obj.get("{{{baseName}}}").items()) if obj.get("{{{baseName}}}") is not None else None{{^-last}},{{/-last}}
             {{/items.isEnumOrRef}}
             {{#items.isEnumOrRef}}
             "{{{name}}}": dict((_k, _v) for _k, _v in obj.get("{{{baseName}}}").items()){{^-last}},{{/-last}}

modules/openapi-generator/src/test/resources/3_0/python/petstore-with-fake-endpoints-models-for-testing.yaml

@@ -2109,3 +2109,17 @@ components:
       - $ref: '#/components/schemas/RgbColor'
       - $ref: '#/components/schemas/RgbaColor'
       - $ref: '#/components/schemas/HexColor'
+    InnerDictWithProperty:
+      type: object
+      properties:
+        aProperty:
+          type: object
+    DictWithAdditionalProperties:
+      type: object
+      additionalProperties:
+        $ref: "#/components/schemas/InnerDictWithProperty"
+    ParentWithOptionalDict:
+      type: object
+      properties:
+        optionalDict:
+          $ref: "#/components/schemas/DictWithAdditionalProperties"

samples/openapi3/client/petstore/python-nextgen-aiohttp/.openapi-generator/FILES

@@ -39,6 +39,7 @@ docs/FooGetDefaultResponse.md
 docs/FormatTest.md
 docs/HasOnlyReadOnly.md
 docs/HealthCheckResult.md
+docs/InnerDictWithProperty.md
 docs/List.md
 docs/MapTest.md
 docs/MixedPropertiesAndAdditionalPropertiesClass.md
@@ -55,6 +56,7 @@ docs/OuterEnumDefaultValue.md
 docs/OuterEnumInteger.md
 docs/OuterEnumIntegerDefaultValue.md
 docs/OuterObjectWithEnumProperty.md
+docs/ParentWithOptionalDict.md
 docs/Pet.md
 docs/PetApi.md
 docs/Pig.md
@@ -115,6 +117,7 @@ petstore_api/models/foo_get_default_response.py
 petstore_api/models/format_test.py
 petstore_api/models/has_only_read_only.py
 petstore_api/models/health_check_result.py
+petstore_api/models/inner_dict_with_property.py
 petstore_api/models/list.py
 petstore_api/models/map_test.py
 petstore_api/models/mixed_properties_and_additional_properties_class.py
@@ -131,6 +134,7 @@ petstore_api/models/outer_enum_default_value.py
 petstore_api/models/outer_enum_integer.py
 petstore_api/models/outer_enum_integer_default_value.py
 petstore_api/models/outer_object_with_enum_property.py
+petstore_api/models/parent_with_optional_dict.py
 petstore_api/models/pet.py
 petstore_api/models/pig.py
 petstore_api/models/read_only_first.py

samples/openapi3/client/petstore/python-nextgen-aiohttp/README.md

@@ -164,6 +164,7 @@ Class | Method | HTTP request | Description
  - [FormatTest](docs/FormatTest.md)
  - [HasOnlyReadOnly](docs/HasOnlyReadOnly.md)
  - [HealthCheckResult](docs/HealthCheckResult.md)
+ - [InnerDictWithProperty](docs/InnerDictWithProperty.md)
  - [List](docs/List.md)
  - [MapTest](docs/MapTest.md)
  - [MixedPropertiesAndAdditionalPropertiesClass](docs/MixedPropertiesAndAdditionalPropertiesClass.md)
@@ -180,6 +181,7 @@ Class | Method | HTTP request | Description
  - [OuterEnumInteger](docs/OuterEnumInteger.md)
  - [OuterEnumIntegerDefaultValue](docs/OuterEnumIntegerDefaultValue.md)
  - [OuterObjectWithEnumProperty](docs/OuterObjectWithEnumProperty.md)
+ - [ParentWithOptionalDict](docs/ParentWithOptionalDict.md)
  - [Pet](docs/Pet.md)
  - [Pig](docs/Pig.md)
  - [ReadOnlyFirst](docs/ReadOnlyFirst.md)

samples/openapi3/client/petstore/python-nextgen-aiohttp/docs/InnerDictWithProperty.md

@@ -0,0 +1,28 @@
+# InnerDictWithProperty
+
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**a_property** | **object** |  | [optional] 
+
+## Example
+
+```python
+from petstore_api.models.inner_dict_with_property import InnerDictWithProperty
+
+# TODO update the JSON string below
+json = "{}"
+# create an instance of InnerDictWithProperty from a JSON string
+inner_dict_with_property_instance = InnerDictWithProperty.from_json(json)
+# print the JSON string representation of the object
+print InnerDictWithProperty.to_json()
+
+# convert the object into a dict
+inner_dict_with_property_dict = inner_dict_with_property_instance.to_dict()
+# create an instance of InnerDictWithProperty from a dict
+inner_dict_with_property_form_dict = inner_dict_with_property.from_dict(inner_dict_with_property_dict)
+```
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/openapi3/client/petstore/python-nextgen-aiohttp/docs/ParentWithOptionalDict.md

@@ -0,0 +1,28 @@
+# ParentWithOptionalDict
+
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**optional_dict** | [**Dict[str, InnerDictWithProperty]**](InnerDictWithProperty.md) |  | [optional] 
+
+## Example
+
+```python
+from petstore_api.models.parent_with_optional_dict import ParentWithOptionalDict
+
+# TODO update the JSON string below
+json = "{}"
+# create an instance of ParentWithOptionalDict from a JSON string
+parent_with_optional_dict_instance = ParentWithOptionalDict.from_json(json)
+# print the JSON string representation of the object
+print ParentWithOptionalDict.to_json()
+
+# convert the object into a dict
+parent_with_optional_dict_dict = parent_with_optional_dict_instance.to_dict()
+# create an instance of ParentWithOptionalDict from a dict
+parent_with_optional_dict_form_dict = parent_with_optional_dict.from_dict(parent_with_optional_dict_dict)
+```
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/openapi3/client/petstore/python-nextgen-aiohttp/petstore_api/__init__.py

@@ -69,6 +69,7 @@ from petstore_api.models.foo_get_default_response import FooGetDefaultResponse
 from petstore_api.models.format_test import FormatTest
 from petstore_api.models.has_only_read_only import HasOnlyReadOnly
 from petstore_api.models.health_check_result import HealthCheckResult
+from petstore_api.models.inner_dict_with_property import InnerDictWithProperty
 from petstore_api.models.list import List
 from petstore_api.models.map_test import MapTest
 from petstore_api.models.mixed_properties_and_additional_properties_class import MixedPropertiesAndAdditionalPropertiesClass
@@ -85,6 +86,7 @@ from petstore_api.models.outer_enum_default_value import OuterEnumDefaultValue
 from petstore_api.models.outer_enum_integer import OuterEnumInteger
 from petstore_api.models.outer_enum_integer_default_value import OuterEnumIntegerDefaultValue
 from petstore_api.models.outer_object_with_enum_property import OuterObjectWithEnumProperty
+from petstore_api.models.parent_with_optional_dict import ParentWithOptionalDict
 from petstore_api.models.pet import Pet
 from petstore_api.models.pig import Pig
 from petstore_api.models.read_only_first import ReadOnlyFirst

samples/openapi3/client/petstore/python-nextgen-aiohttp/petstore_api/models/__init__.py

@@ -48,6 +48,7 @@ from petstore_api.models.foo_get_default_response import FooGetDefaultResponse
 from petstore_api.models.format_test import FormatTest
 from petstore_api.models.has_only_read_only import HasOnlyReadOnly
 from petstore_api.models.health_check_result import HealthCheckResult
+from petstore_api.models.inner_dict_with_property import InnerDictWithProperty
 from petstore_api.models.list import List
 from petstore_api.models.map_test import MapTest
 from petstore_api.models.mixed_properties_and_additional_properties_class import MixedPropertiesAndAdditionalPropertiesClass
@@ -64,6 +65,7 @@ from petstore_api.models.outer_enum_default_value import OuterEnumDefaultValue
 from petstore_api.models.outer_enum_integer import OuterEnumInteger
 from petstore_api.models.outer_enum_integer_default_value import OuterEnumIntegerDefaultValue
 from petstore_api.models.outer_object_with_enum_property import OuterObjectWithEnumProperty
+from petstore_api.models.parent_with_optional_dict import ParentWithOptionalDict
 from petstore_api.models.pet import Pet
 from petstore_api.models.pig import Pig
 from petstore_api.models.read_only_first import ReadOnlyFirst

samples/openapi3/client/petstore/python-nextgen-aiohttp/petstore_api/models/inner_dict_with_property.py

@@ -0,0 +1,70 @@
+# coding: utf-8
+
+"""
+    OpenAPI Petstore
+
+    This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\  # noqa: E501
+
+    The version of the OpenAPI document: 1.0.0
+    Generated by OpenAPI Generator (https://openapi-generator.tech)
+
+    Do not edit the class manually.
+"""
+
+
+from __future__ import annotations
+from inspect import getfullargspec
+import pprint
+import re  # noqa: F401
+import json
+
+
+from typing import Any, Dict, Optional
+from pydantic import BaseModel, Field
+
+class InnerDictWithProperty(BaseModel):
+    """
+    InnerDictWithProperty
+    """
+    a_property: Optional[Dict[str, Any]] = Field(None, alias="aProperty")
+    __properties = ["aProperty"]
+
+    class Config:
+        allow_population_by_field_name = True
+        validate_assignment = True
+
+    def to_str(self) -> str:
+        """Returns the string representation of the model using alias"""
+        return pprint.pformat(self.dict(by_alias=True))
+
+    def to_json(self) -> str:
+        """Returns the JSON representation of the model using alias"""
+        return json.dumps(self.to_dict())
+
+    @classmethod
+    def from_json(cls, json_str: str) -> InnerDictWithProperty:
+        """Create an instance of InnerDictWithProperty from a JSON string"""
+        return cls.from_dict(json.loads(json_str))
+
+    def to_dict(self):
+        """Returns the dictionary representation of the model using alias"""
+        _dict = self.dict(by_alias=True,
+                          exclude={
+                          },
+                          exclude_none=True)
+        return _dict
+
+    @classmethod
+    def from_dict(cls, obj: dict) -> InnerDictWithProperty:
+        """Create an instance of InnerDictWithProperty from a dict"""
+        if obj is None:
+            return None
+
+        if type(obj) is not dict:
+            return InnerDictWithProperty.parse_obj(obj)
+
+        _obj = InnerDictWithProperty.parse_obj({
+            "a_property": obj.get("aProperty")
+        })
+        return _obj
+

samples/openapi3/client/petstore/python-nextgen-aiohttp/petstore_api/models/mixed_properties_and_additional_properties_class.py

@@ -76,7 +76,7 @@ class MixedPropertiesAndAdditionalPropertiesClass(BaseModel):
         _obj = MixedPropertiesAndAdditionalPropertiesClass.parse_obj({
             "uuid": obj.get("uuid"),
             "date_time": obj.get("dateTime"),
-            "map": dict((_k, Dict[str, Animal].from_dict(_v)) for _k, _v in obj.get("map").items())
+            "map": dict((_k, Dict[str, Animal].from_dict(_v)) for _k, _v in obj.get("map").items()) if obj.get("map") is not None else None
         })
         return _obj
 

samples/openapi3/client/petstore/python-nextgen-aiohttp/petstore_api/models/parent_with_optional_dict.py

@@ -0,0 +1,78 @@
+# coding: utf-8
+
+"""
+    OpenAPI Petstore
+
+    This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\  # noqa: E501
+
+    The version of the OpenAPI document: 1.0.0
+    Generated by OpenAPI Generator (https://openapi-generator.tech)
+
+    Do not edit the class manually.
+"""
+
+
+from __future__ import annotations
+from inspect import getfullargspec
+import pprint
+import re  # noqa: F401
+import json
+
+
+from typing import Dict, Optional
+from pydantic import BaseModel, Field
+from petstore_api.models.inner_dict_with_property import InnerDictWithProperty
+
+class ParentWithOptionalDict(BaseModel):
+    """
+    ParentWithOptionalDict
+    """
+    optional_dict: Optional[Dict[str, InnerDictWithProperty]] = Field(None, alias="optionalDict")
+    __properties = ["optionalDict"]
+
+    class Config:
+        allow_population_by_field_name = True
+        validate_assignment = True
+
+    def to_str(self) -> str:
+        """Returns the string representation of the model using alias"""
+        return pprint.pformat(self.dict(by_alias=True))
+
+    def to_json(self) -> str:
+        """Returns the JSON representation of the model using alias"""
+        return json.dumps(self.to_dict())
+
+    @classmethod
+    def from_json(cls, json_str: str) -> ParentWithOptionalDict:
+        """Create an instance of ParentWithOptionalDict from a JSON string"""
+        return cls.from_dict(json.loads(json_str))
+
+    def to_dict(self):
+        """Returns the dictionary representation of the model using alias"""
+        _dict = self.dict(by_alias=True,
+                          exclude={
+                          },
+                          exclude_none=True)
+        # override the default output from pydantic by calling `to_dict()` of each value in optional_dict (dict)
+        _field_dict = {}
+        if self.optional_dict:
+            for _key in self.optional_dict:
+                if self.optional_dict[_key]:
+                    _field_dict[_key] = self.optional_dict[_key].to_dict()
+            _dict['optionalDict'] = _field_dict
+        return _dict
+
+    @classmethod
+    def from_dict(cls, obj: dict) -> ParentWithOptionalDict:
+        """Create an instance of ParentWithOptionalDict from a dict"""
+        if obj is None:
+            return None
+
+        if type(obj) is not dict:
+            return ParentWithOptionalDict.parse_obj(obj)
+
+        _obj = ParentWithOptionalDict.parse_obj({
+            "optional_dict": dict((_k, Dict[str, InnerDictWithProperty].from_dict(_v)) for _k, _v in obj.get("optionalDict").items()) if obj.get("optionalDict") is not None else None
+        })
+        return _obj
+

samples/openapi3/client/petstore/python-nextgen-aiohttp/test/test_inner_dict_with_property.py

@@ -0,0 +1,56 @@
+# coding: utf-8
+
+"""
+    OpenAPI Petstore
+
+    This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\  # noqa: E501
+
+    The version of the OpenAPI document: 1.0.0
+    Generated by OpenAPI Generator (https://openapi-generator.tech)
+
+    Do not edit the class manually.
+"""
+
+
+from __future__ import absolute_import
+
+import unittest
+import datetime
+
+import petstore_api
+from petstore_api.models.inner_dict_with_property import InnerDictWithProperty  # noqa: E501
+from petstore_api.rest import ApiException
+
+class TestInnerDictWithProperty(unittest.TestCase):
+    """InnerDictWithProperty unit test stubs"""
+
+    def setUp(self):
+        pass
+
+    def tearDown(self):
+        pass
+
+    def make_instance(self, include_optional):
+        """Test InnerDictWithProperty
+            include_option is a boolean, when False only required
+            params are included, when True both required and
+            optional params are included """
+        # uncomment below to create an instance of `InnerDictWithProperty`
+        """
+        model = petstore_api.models.inner_dict_with_property.InnerDictWithProperty()  # noqa: E501
+        if include_optional :
+            return InnerDictWithProperty(
+                a_property = None
+            )
+        else :
+            return InnerDictWithProperty(
+        )
+        """
+
+    def testInnerDictWithProperty(self):
+        """Test InnerDictWithProperty"""
+        # inst_req_only = self.make_instance(include_optional=False)
+        # inst_req_and_optional = self.make_instance(include_optional=True)
+
+if __name__ == '__main__':
+    unittest.main()

samples/openapi3/client/petstore/python-nextgen-aiohttp/test/test_parent_with_optional_dict.py

@@ -0,0 +1,59 @@
+# coding: utf-8
+
+"""
+    OpenAPI Petstore
+
+    This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\  # noqa: E501
+
+    The version of the OpenAPI document: 1.0.0
+    Generated by OpenAPI Generator (https://openapi-generator.tech)
+
+    Do not edit the class manually.
+"""
+
+
+from __future__ import absolute_import
+
+import unittest
+import datetime
+
+import petstore_api
+from petstore_api.models.parent_with_optional_dict import ParentWithOptionalDict  # noqa: E501
+from petstore_api.rest import ApiException
+
+class TestParentWithOptionalDict(unittest.TestCase):
+    """ParentWithOptionalDict unit test stubs"""
+
+    def setUp(self):
+        pass
+
+    def tearDown(self):
+        pass
+
+    def make_instance(self, include_optional):
+        """Test ParentWithOptionalDict
+            include_option is a boolean, when False only required
+            params are included, when True both required and
+            optional params are included """
+        # uncomment below to create an instance of `ParentWithOptionalDict`
+        """
+        model = petstore_api.models.parent_with_optional_dict.ParentWithOptionalDict()  # noqa: E501
+        if include_optional :
+            return ParentWithOptionalDict(
+                optional_dict = {
+                    'key' : petstore_api.models.inner_dict_with_property.InnerDictWithProperty(
+                        a_property = petstore_api.models.a_property.aProperty(), )
+                    }
+            )
+        else :
+            return ParentWithOptionalDict(
+        )
+        """
+
+    def testParentWithOptionalDict(self):
+        """Test ParentWithOptionalDict"""
+        # inst_req_only = self.make_instance(include_optional=False)
+        # inst_req_and_optional = self.make_instance(include_optional=True)
+
+if __name__ == '__main__':
+    unittest.main()

samples/openapi3/client/petstore/python-nextgen/.openapi-generator/FILES

@@ -39,6 +39,7 @@ docs/FooGetDefaultResponse.md
 docs/FormatTest.md
 docs/HasOnlyReadOnly.md
 docs/HealthCheckResult.md
+docs/InnerDictWithProperty.md
 docs/List.md
 docs/MapTest.md
 docs/MixedPropertiesAndAdditionalPropertiesClass.md
@@ -55,6 +56,7 @@ docs/OuterEnumDefaultValue.md
 docs/OuterEnumInteger.md
 docs/OuterEnumIntegerDefaultValue.md
 docs/OuterObjectWithEnumProperty.md
+docs/ParentWithOptionalDict.md
 docs/Pet.md
 docs/PetApi.md
 docs/Pig.md
@@ -115,6 +117,7 @@ petstore_api/models/foo_get_default_response.py
 petstore_api/models/format_test.py
 petstore_api/models/has_only_read_only.py
 petstore_api/models/health_check_result.py
+petstore_api/models/inner_dict_with_property.py
 petstore_api/models/list.py
 petstore_api/models/map_test.py
 petstore_api/models/mixed_properties_and_additional_properties_class.py
@@ -131,6 +134,7 @@ petstore_api/models/outer_enum_default_value.py
 petstore_api/models/outer_enum_integer.py
 petstore_api/models/outer_enum_integer_default_value.py
 petstore_api/models/outer_object_with_enum_property.py
+petstore_api/models/parent_with_optional_dict.py
 petstore_api/models/pet.py
 petstore_api/models/pig.py
 petstore_api/models/read_only_first.py

samples/openapi3/client/petstore/python-nextgen/README.md

@@ -164,6 +164,7 @@ Class | Method | HTTP request | Description
  - [FormatTest](docs/FormatTest.md)
  - [HasOnlyReadOnly](docs/HasOnlyReadOnly.md)
  - [HealthCheckResult](docs/HealthCheckResult.md)
+ - [InnerDictWithProperty](docs/InnerDictWithProperty.md)
  - [List](docs/List.md)
  - [MapTest](docs/MapTest.md)
  - [MixedPropertiesAndAdditionalPropertiesClass](docs/MixedPropertiesAndAdditionalPropertiesClass.md)
@@ -180,6 +181,7 @@ Class | Method | HTTP request | Description
  - [OuterEnumInteger](docs/OuterEnumInteger.md)
  - [OuterEnumIntegerDefaultValue](docs/OuterEnumIntegerDefaultValue.md)
  - [OuterObjectWithEnumProperty](docs/OuterObjectWithEnumProperty.md)
+ - [ParentWithOptionalDict](docs/ParentWithOptionalDict.md)
  - [Pet](docs/Pet.md)
  - [Pig](docs/Pig.md)
  - [ReadOnlyFirst](docs/ReadOnlyFirst.md)

samples/openapi3/client/petstore/python-nextgen/docs/InnerDictWithProperty.md

@@ -0,0 +1,28 @@
+# InnerDictWithProperty
+
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**a_property** | **object** |  | [optional] 
+
+## Example
+
+```python
+from petstore_api.models.inner_dict_with_property import InnerDictWithProperty
+
+# TODO update the JSON string below
+json = "{}"
+# create an instance of InnerDictWithProperty from a JSON string
+inner_dict_with_property_instance = InnerDictWithProperty.from_json(json)
+# print the JSON string representation of the object
+print InnerDictWithProperty.to_json()
+
+# convert the object into a dict
+inner_dict_with_property_dict = inner_dict_with_property_instance.to_dict()
+# create an instance of InnerDictWithProperty from a dict
+inner_dict_with_property_form_dict = inner_dict_with_property.from_dict(inner_dict_with_property_dict)
+```
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/openapi3/client/petstore/python-nextgen/docs/ParentWithOptionalDict.md

@@ -0,0 +1,28 @@
+# ParentWithOptionalDict
+
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**optional_dict** | [**Dict[str, InnerDictWithProperty]**](InnerDictWithProperty.md) |  | [optional] 
+
+## Example
+
+```python
+from petstore_api.models.parent_with_optional_dict import ParentWithOptionalDict
+
+# TODO update the JSON string below
+json = "{}"
+# create an instance of ParentWithOptionalDict from a JSON string
+parent_with_optional_dict_instance = ParentWithOptionalDict.from_json(json)
+# print the JSON string representation of the object
+print ParentWithOptionalDict.to_json()
+
+# convert the object into a dict
+parent_with_optional_dict_dict = parent_with_optional_dict_instance.to_dict()
+# create an instance of ParentWithOptionalDict from a dict
+parent_with_optional_dict_form_dict = parent_with_optional_dict.from_dict(parent_with_optional_dict_dict)
+```
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

samples/openapi3/client/petstore/python-nextgen/petstore_api/__init__.py

@@ -69,6 +69,7 @@ from petstore_api.models.foo_get_default_response import FooGetDefaultResponse
 from petstore_api.models.format_test import FormatTest
 from petstore_api.models.has_only_read_only import HasOnlyReadOnly
 from petstore_api.models.health_check_result import HealthCheckResult
+from petstore_api.models.inner_dict_with_property import InnerDictWithProperty
 from petstore_api.models.list import List
 from petstore_api.models.map_test import MapTest
 from petstore_api.models.mixed_properties_and_additional_properties_class import MixedPropertiesAndAdditionalPropertiesClass
@@ -85,6 +86,7 @@ from petstore_api.models.outer_enum_default_value import OuterEnumDefaultValue
 from petstore_api.models.outer_enum_integer import OuterEnumInteger
 from petstore_api.models.outer_enum_integer_default_value import OuterEnumIntegerDefaultValue
 from petstore_api.models.outer_object_with_enum_property import OuterObjectWithEnumProperty
+from petstore_api.models.parent_with_optional_dict import ParentWithOptionalDict
 from petstore_api.models.pet import Pet
 from petstore_api.models.pig import Pig
 from petstore_api.models.read_only_first import ReadOnlyFirst

samples/openapi3/client/petstore/python-nextgen/petstore_api/models/__init__.py

@@ -48,6 +48,7 @@ from petstore_api.models.foo_get_default_response import FooGetDefaultResponse
 from petstore_api.models.format_test import FormatTest
 from petstore_api.models.has_only_read_only import HasOnlyReadOnly
 from petstore_api.models.health_check_result import HealthCheckResult
+from petstore_api.models.inner_dict_with_property import InnerDictWithProperty
 from petstore_api.models.list import List
 from petstore_api.models.map_test import MapTest
 from petstore_api.models.mixed_properties_and_additional_properties_class import MixedPropertiesAndAdditionalPropertiesClass
@@ -64,6 +65,7 @@ from petstore_api.models.outer_enum_default_value import OuterEnumDefaultValue
 from petstore_api.models.outer_enum_integer import OuterEnumInteger
 from petstore_api.models.outer_enum_integer_default_value import OuterEnumIntegerDefaultValue
 from petstore_api.models.outer_object_with_enum_property import OuterObjectWithEnumProperty
+from petstore_api.models.parent_with_optional_dict import ParentWithOptionalDict
 from petstore_api.models.pet import Pet
 from petstore_api.models.pig import Pig
 from petstore_api.models.read_only_first import ReadOnlyFirst

samples/openapi3/client/petstore/python-nextgen/petstore_api/models/inner_dict_with_property.py

@@ -0,0 +1,82 @@
+# coding: utf-8
+
+"""
+    OpenAPI Petstore
+
+    This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\  # noqa: E501
+
+    The version of the OpenAPI document: 1.0.0
+    Generated by OpenAPI Generator (https://openapi-generator.tech)
+
+    Do not edit the class manually.
+"""
+
+
+from __future__ import annotations
+from inspect import getfullargspec
+import pprint
+import re  # noqa: F401
+import json
+
+
+from typing import Any, Dict, Optional
+from pydantic import BaseModel, Field
+
+class InnerDictWithProperty(BaseModel):
+    """
+    InnerDictWithProperty
+    """
+    a_property: Optional[Dict[str, Any]] = Field(None, alias="aProperty")
+    additional_properties: Dict[str, Any] = {}
+    __properties = ["aProperty"]
+
+    class Config:
+        allow_population_by_field_name = True
+        validate_assignment = True
+
+    def to_str(self) -> str:
+        """Returns the string representation of the model using alias"""
+        return pprint.pformat(self.dict(by_alias=True))
+
+    def to_json(self) -> str:
+        """Returns the JSON representation of the model using alias"""
+        return json.dumps(self.to_dict())
+
+    @classmethod
+    def from_json(cls, json_str: str) -> InnerDictWithProperty:
+        """Create an instance of InnerDictWithProperty from a JSON string"""
+        return cls.from_dict(json.loads(json_str))
+
+    def to_dict(self):
+        """Returns the dictionary representation of the model using alias"""
+        _dict = self.dict(by_alias=True,
+                          exclude={
+                            "additional_properties"
+                          },
+                          exclude_none=True)
+        # puts key-value pairs in additional_properties in the top level
+        if self.additional_properties is not None:
+            for _key, _value in self.additional_properties.items():
+                _dict[_key] = _value
+
+        return _dict
+
+    @classmethod
+    def from_dict(cls, obj: dict) -> InnerDictWithProperty:
+        """Create an instance of InnerDictWithProperty from a dict"""
+        if obj is None:
+            return None
+
+        if type(obj) is not dict:
+            return InnerDictWithProperty.parse_obj(obj)
+
+        _obj = InnerDictWithProperty.parse_obj({
+            "a_property": obj.get("aProperty")
+        })
+        # store additional fields in additional_properties
+        for _key in obj.keys():
+            if _key not in cls.__properties:
+                _obj.additional_properties[_key] = obj.get(_key)
+
+        return _obj
+

samples/openapi3/client/petstore/python-nextgen/petstore_api/models/mixed_properties_and_additional_properties_class.py

@@ -83,7 +83,7 @@ class MixedPropertiesAndAdditionalPropertiesClass(BaseModel):
         _obj = MixedPropertiesAndAdditionalPropertiesClass.parse_obj({
             "uuid": obj.get("uuid"),
             "date_time": obj.get("dateTime"),
-            "map": dict((_k, Dict[str, Animal].from_dict(_v)) for _k, _v in obj.get("map").items())
+            "map": dict((_k, Dict[str, Animal].from_dict(_v)) for _k, _v in obj.get("map").items()) if obj.get("map") is not None else None
         })
         # store additional fields in additional_properties
         for _key in obj.keys():

samples/openapi3/client/petstore/python-nextgen/petstore_api/models/parent_with_optional_dict.py

@@ -0,0 +1,90 @@
+# coding: utf-8
+
+"""
+    OpenAPI Petstore
+
+    This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\  # noqa: E501
+
+    The version of the OpenAPI document: 1.0.0
+    Generated by OpenAPI Generator (https://openapi-generator.tech)
+
+    Do not edit the class manually.
+"""
+
+
+from __future__ import annotations
+from inspect import getfullargspec
+import pprint
+import re  # noqa: F401
+import json
+
+
+from typing import Dict, Optional
+from pydantic import BaseModel, Field
+from petstore_api.models.inner_dict_with_property import InnerDictWithProperty
+
+class ParentWithOptionalDict(BaseModel):
+    """
+    ParentWithOptionalDict
+    """
+    optional_dict: Optional[Dict[str, InnerDictWithProperty]] = Field(None, alias="optionalDict")
+    additional_properties: Dict[str, Any] = {}
+    __properties = ["optionalDict"]
+
+    class Config:
+        allow_population_by_field_name = True
+        validate_assignment = True
+
+    def to_str(self) -> str:
+        """Returns the string representation of the model using alias"""
+        return pprint.pformat(self.dict(by_alias=True))
+
+    def to_json(self) -> str:
+        """Returns the JSON representation of the model using alias"""
+        return json.dumps(self.to_dict())
+
+    @classmethod
+    def from_json(cls, json_str: str) -> ParentWithOptionalDict:
+        """Create an instance of ParentWithOptionalDict from a JSON string"""
+        return cls.from_dict(json.loads(json_str))
+
+    def to_dict(self):
+        """Returns the dictionary representation of the model using alias"""
+        _dict = self.dict(by_alias=True,
+                          exclude={
+                            "additional_properties"
+                          },
+                          exclude_none=True)
+        # override the default output from pydantic by calling `to_dict()` of each value in optional_dict (dict)
+        _field_dict = {}
+        if self.optional_dict:
+            for _key in self.optional_dict:
+                if self.optional_dict[_key]:
+                    _field_dict[_key] = self.optional_dict[_key].to_dict()
+            _dict['optionalDict'] = _field_dict
+        # puts key-value pairs in additional_properties in the top level
+        if self.additional_properties is not None:
+            for _key, _value in self.additional_properties.items():
+                _dict[_key] = _value
+
+        return _dict
+
+    @classmethod
+    def from_dict(cls, obj: dict) -> ParentWithOptionalDict:
+        """Create an instance of ParentWithOptionalDict from a dict"""
+        if obj is None:
+            return None
+
+        if type(obj) is not dict:
+            return ParentWithOptionalDict.parse_obj(obj)
+
+        _obj = ParentWithOptionalDict.parse_obj({
+            "optional_dict": dict((_k, Dict[str, InnerDictWithProperty].from_dict(_v)) for _k, _v in obj.get("optionalDict").items()) if obj.get("optionalDict") is not None else None
+        })
+        # store additional fields in additional_properties
+        for _key in obj.keys():
+            if _key not in cls.__properties:
+                _obj.additional_properties[_key] = obj.get(_key)
+
+        return _obj
+

samples/openapi3/client/petstore/python-nextgen/test/test_inner_dict_with_property.py

@@ -0,0 +1,56 @@
+# coding: utf-8
+
+"""
+    OpenAPI Petstore
+
+    This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\  # noqa: E501
+
+    The version of the OpenAPI document: 1.0.0
+    Generated by OpenAPI Generator (https://openapi-generator.tech)
+
+    Do not edit the class manually.
+"""
+
+
+from __future__ import absolute_import
+
+import unittest
+import datetime
+
+import petstore_api
+from petstore_api.models.inner_dict_with_property import InnerDictWithProperty  # noqa: E501
+from petstore_api.rest import ApiException
+
+class TestInnerDictWithProperty(unittest.TestCase):
+    """InnerDictWithProperty unit test stubs"""
+
+    def setUp(self):
+        pass
+
+    def tearDown(self):
+        pass
+
+    def make_instance(self, include_optional):
+        """Test InnerDictWithProperty
+            include_option is a boolean, when False only required
+            params are included, when True both required and
+            optional params are included """
+        # uncomment below to create an instance of `InnerDictWithProperty`
+        """
+        model = petstore_api.models.inner_dict_with_property.InnerDictWithProperty()  # noqa: E501
+        if include_optional :
+            return InnerDictWithProperty(
+                a_property = None
+            )
+        else :
+            return InnerDictWithProperty(
+        )
+        """
+
+    def testInnerDictWithProperty(self):
+        """Test InnerDictWithProperty"""
+        # inst_req_only = self.make_instance(include_optional=False)
+        # inst_req_and_optional = self.make_instance(include_optional=True)
+
+if __name__ == '__main__':
+    unittest.main()

samples/openapi3/client/petstore/python-nextgen/test/test_parent_with_optional_dict.py

@@ -0,0 +1,59 @@
+# coding: utf-8
+
+"""
+    OpenAPI Petstore
+
+    This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\  # noqa: E501
+
+    The version of the OpenAPI document: 1.0.0
+    Generated by OpenAPI Generator (https://openapi-generator.tech)
+
+    Do not edit the class manually.
+"""
+
+
+from __future__ import absolute_import
+
+import unittest
+import datetime
+
+import petstore_api
+from petstore_api.models.parent_with_optional_dict import ParentWithOptionalDict  # noqa: E501
+from petstore_api.rest import ApiException
+
+class TestParentWithOptionalDict(unittest.TestCase):
+    """ParentWithOptionalDict unit test stubs"""
+
+    def setUp(self):
+        pass
+
+    def tearDown(self):
+        pass
+
+    def make_instance(self, include_optional):
+        """Test ParentWithOptionalDict
+            include_option is a boolean, when False only required
+            params are included, when True both required and
+            optional params are included """
+        # uncomment below to create an instance of `ParentWithOptionalDict`
+        """
+        model = petstore_api.models.parent_with_optional_dict.ParentWithOptionalDict()  # noqa: E501
+        if include_optional :
+            return ParentWithOptionalDict(
+                optional_dict = {
+                    'key' : petstore_api.models.inner_dict_with_property.InnerDictWithProperty(
+                        a_property = petstore_api.models.a_property.aProperty(), )
+                    }
+            )
+        else :
+            return ParentWithOptionalDict(
+        )
+        """
+
+    def testParentWithOptionalDict(self):
+        """Test ParentWithOptionalDict"""
+        # inst_req_only = self.make_instance(include_optional=False)
+        # inst_req_and_optional = self.make_instance(include_optional=True)
+
+if __name__ == '__main__':
+    unittest.main()

samples/openapi3/client/petstore/python-nextgen/tests/test_model.py

@@ -387,3 +387,9 @@ class ModelTests(unittest.TestCase):
         enum_test = petstore_api.EnumTest(enum_string_required="lower")
         self.assertEqual(enum_test.enum_integer_default, 5)
 
+    def test_object_with_optional_dict(self):
+        # for https://github.com/OpenAPITools/openapi-generator/issues/14913
+        # shouldn't throw exception by the optional dict property
+        a = petstore_api.ParentWithOptionalDict.from_dict({})
+        self.assertFalse(a is None)
+