Fix nullable dates

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixes
 - Spacing and extra returns for Union types of `additionalProperties` (#266 & #268). Thanks @joshzana & @packyg!
 - Title of inline schemas will no longer be missing characters (#271 & #274). Thanks @kalzoo!
+- Handling of nulls (Nones) when parsing or constructing dates (#267). Thanks @fyhertz! 
 
 ## 0.7.2 - 2020-12-08
 ### Fixes

end_to_end_tests/golden-record-custom/custom_e2e/api/tests/get_user_list.py

@@ -55,7 +55,6 @@ def httpx_request(
 
     if isinstance(some_date, datetime.date):
         json_some_date = some_date.isoformat()
-
     else:
         json_some_date = some_date.isoformat()
 

end_to_end_tests/golden-record-custom/custom_e2e/models/a_model.py

@@ -1,5 +1,5 @@
 import datetime
-from typing import Any, Dict, List, Optional, Union
+from typing import Any, Dict, List, Optional, Union, cast
 
 import attr
 from dateutil.parser import isoparse
@@ -17,6 +17,7 @@ class AModel:
     a_camel_date_time: Union[datetime.datetime, datetime.date]
     a_date: datetime.date
     required_not_nullable: str
+    a_nullable_date: Optional[datetime.date]
     required_nullable: Optional[str]
     nested_list_of_enums: Union[Unset, List[List[DifferentEnum]]] = UNSET
     attr_1_leading_digit: Union[Unset, str] = UNSET
@@ -33,7 +34,6 @@ def to_dict(self) -> Dict[str, Any]:
             a_camel_date_time = self.a_camel_date_time.isoformat()
 
         a_date = self.a_date.isoformat()
-
         required_not_nullable = self.required_not_nullable
         nested_list_of_enums: Union[Unset, List[Any]] = UNSET
         if not isinstance(self.nested_list_of_enums, Unset):
@@ -47,6 +47,7 @@ def to_dict(self) -> Dict[str, Any]:
 
                 nested_list_of_enums.append(nested_list_of_enums_item)
 
+        a_nullable_date = self.a_nullable_date.isoformat() if self.a_nullable_date else None
         attr_1_leading_digit = self.attr_1_leading_digit
         required_nullable = self.required_nullable
         not_required_nullable = self.not_required_nullable
@@ -59,6 +60,7 @@ def to_dict(self) -> Dict[str, Any]:
                 "aCamelDateTime": a_camel_date_time,
                 "a_date": a_date,
                 "required_not_nullable": required_not_nullable,
+                "a_nullable_date": a_nullable_date,
                 "required_nullable": required_nullable,
             }
         )
@@ -109,6 +111,11 @@ def _parse_a_camel_date_time(data: Any) -> Union[datetime.datetime, datetime.dat
 
             nested_list_of_enums.append(nested_list_of_enums_item)
 
+        a_nullable_date = None
+        _a_nullable_date = d.pop("a_nullable_date")
+        if _a_nullable_date is not None:
+            a_nullable_date = isoparse(cast(str, _a_nullable_date)).date()
+
         attr_1_leading_digit = d.pop("1_leading_digit", UNSET)
 
         required_nullable = d.pop("required_nullable")
@@ -123,6 +130,7 @@ def _parse_a_camel_date_time(data: Any) -> Union[datetime.datetime, datetime.dat
             a_date=a_date,
             required_not_nullable=required_not_nullable,
             nested_list_of_enums=nested_list_of_enums,
+            a_nullable_date=a_nullable_date,
             attr_1_leading_digit=attr_1_leading_digit,
             required_nullable=required_nullable,
             not_required_nullable=not_required_nullable,

end_to_end_tests/golden-record/my_test_api_client/api/tests/get_user_list.py

@@ -28,7 +28,6 @@ def _get_kwargs(
 
     if isinstance(some_date, datetime.date):
         json_some_date = some_date.isoformat()
-
     else:
         json_some_date = some_date.isoformat()
 

end_to_end_tests/golden-record/my_test_api_client/models/a_model.py

@@ -1,5 +1,5 @@
 import datetime
-from typing import Any, Dict, List, Optional, Union
+from typing import Any, Dict, List, Optional, Union, cast
 
 import attr
 from dateutil.parser import isoparse
@@ -17,6 +17,7 @@ class AModel:
     a_camel_date_time: Union[datetime.datetime, datetime.date]
     a_date: datetime.date
     required_not_nullable: str
+    a_nullable_date: Optional[datetime.date]
     required_nullable: Optional[str]
     nested_list_of_enums: Union[Unset, List[List[DifferentEnum]]] = UNSET
     attr_1_leading_digit: Union[Unset, str] = UNSET
@@ -33,7 +34,6 @@ def to_dict(self) -> Dict[str, Any]:
             a_camel_date_time = self.a_camel_date_time.isoformat()
 
         a_date = self.a_date.isoformat()
-
         required_not_nullable = self.required_not_nullable
         nested_list_of_enums: Union[Unset, List[Any]] = UNSET
         if not isinstance(self.nested_list_of_enums, Unset):
@@ -47,6 +47,7 @@ def to_dict(self) -> Dict[str, Any]:
 
                 nested_list_of_enums.append(nested_list_of_enums_item)
 
+        a_nullable_date = self.a_nullable_date.isoformat() if self.a_nullable_date else None
         attr_1_leading_digit = self.attr_1_leading_digit
         required_nullable = self.required_nullable
         not_required_nullable = self.not_required_nullable
@@ -59,6 +60,7 @@ def to_dict(self) -> Dict[str, Any]:
                 "aCamelDateTime": a_camel_date_time,
                 "a_date": a_date,
                 "required_not_nullable": required_not_nullable,
+                "a_nullable_date": a_nullable_date,
                 "required_nullable": required_nullable,
             }
         )
@@ -109,6 +111,11 @@ def _parse_a_camel_date_time(data: Any) -> Union[datetime.datetime, datetime.dat
 
             nested_list_of_enums.append(nested_list_of_enums_item)
 
+        a_nullable_date = None
+        _a_nullable_date = d.pop("a_nullable_date")
+        if _a_nullable_date is not None:
+            a_nullable_date = isoparse(cast(str, _a_nullable_date)).date()
+
         attr_1_leading_digit = d.pop("1_leading_digit", UNSET)
 
         required_nullable = d.pop("required_nullable")
@@ -123,6 +130,7 @@ def _parse_a_camel_date_time(data: Any) -> Union[datetime.datetime, datetime.dat
             a_date=a_date,
             required_not_nullable=required_not_nullable,
             nested_list_of_enums=nested_list_of_enums,
+            a_nullable_date=a_nullable_date,
             attr_1_leading_digit=attr_1_leading_digit,
             required_nullable=required_nullable,
             not_required_nullable=not_required_nullable,

end_to_end_tests/openapi.json

@@ -622,7 +622,7 @@
     "schemas": {
       "AModel": {
         "title": "AModel",
-        "required": ["an_enum_value", "aCamelDateTime", "a_date", "required_nullable", "required_not_nullable"],
+        "required": ["an_enum_value", "aCamelDateTime", "a_date", "a_nullable_date", "required_nullable", "required_not_nullable"],
         "type": "object",
         "properties": {
           "an_enum_value": {
@@ -657,6 +657,12 @@
             "type": "string",
             "format": "date"
           },
+          "a_nullable_date": {
+            "title": "A Nullable Date",
+            "type": "string",
+            "format": "date",
+            "nullable": true
+          },
           "1_leading_digit": {
             "title": "Leading Digit",
             "type": "string"

openapi_python_client/templates/property_templates/date_property.pyi

@@ -1,5 +1,5 @@
 {% macro construct(property, source, initial_value="None") %}
-{% if property.required %}
+{% if property.required and not property.nullable %}
 {{ property.python_name }} = isoparse({{ source }}).date()
 {% else %}
 {{ property.python_name }} = {{ initial_value }}
@@ -11,11 +11,7 @@ if _{{ property.python_name }} is not None:
 
 {% macro transform(property, source, destination, declare_type=True) %}
 {% if property.required %}
-{% if property.nullable %}
-{{ destination }} = {{ source }}.isoformat() if {{ source }} else None
-{% else %}
-{{ destination }} = {{ source }}.isoformat()
-{% endif %}
+{{ destination }} = {{ source }}.isoformat() {% if property.nullable %}if {{ source }} else None {%endif%}
 {% else %}
 {{ destination }}{% if declare_type %}: Union[Unset, str]{% endif %} = UNSET
 if not isinstance({{ source }}, Unset):

openapi_python_client/templates/property_templates/datetime_property.pyi

@@ -1,6 +1,11 @@
 {% macro construct(property, source, initial_value="None") %}
 {% if property.required %}
+{% if property.nullable %}
+{{ property.python_name }} = {{ source }}
+{{ property.python_name }} = isoparse({{ property.python_name }}) if {{ property.python_name }} else None
+{% else %}
 {{ property.python_name }} = isoparse({{ source }})
+{% endif %}
 {% else %}
 {{ property.python_name }} = {{ initial_value }}
 _{{ property.python_name }} = {{ source }}

tests/test_templates/test_property_templates/test_date_property/date_property_template.py

@@ -0,0 +1,8 @@
+from datetime import date
+from typing import cast, Union
+
+from dateutil.parser import isoparse
+{% from "property_templates/date_property.pyi" import transform, construct %}
+some_source = date(2020, 10, 12)
+{{ transform(property, "some_source", "some_destination") }}
+{{ construct(property, "some_destination") }}

tests/test_templates/test_property_templates/test_date_property/optional_nullable.py

@@ -0,0 +1,22 @@
+from datetime import date
+from typing import cast, Union
+
+from dateutil.parser import isoparse
+
+some_source = date(2020, 10, 12)
+
+
+some_destination: Union[Unset, str] = UNSET
+if not isinstance(some_source, Unset):
+
+    some_destination = some_source.isoformat() if some_source else None
+
+
+
+
+
+a_prop = None
+_a_prop = some_destination
+if _a_prop is not None:
+    a_prop = isoparse(cast(str, _a_prop)).date()
+

tests/test_templates/test_property_templates/test_date_property/required_not_null.py

@@ -0,0 +1,15 @@
+from datetime import date
+from typing import cast, Union
+
+from dateutil.parser import isoparse
+
+some_source = date(2020, 10, 12)
+
+
+some_destination = some_source.isoformat() 
+
+
+
+
+a_prop = isoparse(some_destination).date()
+

tests/test_templates/test_property_templates/test_date_property/required_nullable.py

@@ -0,0 +1,18 @@
+from datetime import date
+from typing import cast, Union
+
+from dateutil.parser import isoparse
+
+some_source = date(2020, 10, 12)
+
+
+some_destination = some_source.isoformat() if some_source else None 
+
+
+
+
+a_prop = None
+_a_prop = some_destination
+if _a_prop is not None:
+    a_prop = isoparse(cast(str, _a_prop)).date()
+

tests/test_templates/test_property_templates/test_date_property/test_date_property.py

@@ -0,0 +1,69 @@
+from pathlib import Path
+
+import jinja2
+
+
+def test_required_not_nullable():
+    from openapi_python_client.parser.properties import DateProperty
+
+    prop = DateProperty(
+        name="a_prop",
+        required=True,
+        nullable=False,
+        default=None,
+    )
+    here = Path(__file__).parent
+    templates_dir = here.parent.parent.parent.parent / "openapi_python_client" / "templates"
+
+    env = jinja2.Environment(
+        loader=jinja2.ChoiceLoader([jinja2.FileSystemLoader(here), jinja2.FileSystemLoader(templates_dir)])
+    )
+
+    template = env.get_template("date_property_template.py")
+    content = template.render(property=prop)
+    expected = here / "required_not_null.py"
+    assert content == expected.read_text()
+
+
+def test_required_nullable():
+    from openapi_python_client.parser.properties import DateProperty
+
+    prop = DateProperty(
+        name="a_prop",
+        required=True,
+        nullable=True,
+        default=None,
+    )
+    here = Path(__file__).parent
+    templates_dir = here.parent.parent.parent.parent / "openapi_python_client" / "templates"
+
+    env = jinja2.Environment(
+        loader=jinja2.ChoiceLoader([jinja2.FileSystemLoader(here), jinja2.FileSystemLoader(templates_dir)])
+    )
+
+    template = env.get_template("date_property_template.py")
+    content = template.render(property=prop)
+    expected = here / "required_nullable.py"
+    assert content == expected.read_text()
+
+
+def test_optional_nullable():
+    from openapi_python_client.parser.properties import DateProperty
+
+    prop = DateProperty(
+        name="a_prop",
+        required=False,
+        nullable=True,
+        default=None,
+    )
+    here = Path(__file__).parent
+    templates_dir = here.parent.parent.parent.parent / "openapi_python_client" / "templates"
+
+    env = jinja2.Environment(
+        loader=jinja2.ChoiceLoader([jinja2.FileSystemLoader(here), jinja2.FileSystemLoader(templates_dir)])
+    )
+
+    template = env.get_template("date_property_template.py")
+    content = template.render(property=prop)
+    expected = here / "optional_nullable.py"
+    assert content == expected.read_text()