feat: support prefixItems for arrays

Generates a union of all types in `prefixItems` and `items` for the inner list item type

end_to_end_tests/3.1_specific.openapi.yaml

@@ -47,3 +47,34 @@ paths:
             "application/json":
               schema:
                 const: "Why have a fixed response? I dunno"
+  "/prefixItems":
+    post:
+      tags: [ "prefixItems" ]
+      requestBody:
+        required: true
+        content:
+          "application/json":
+            schema:
+              type: object
+              properties:
+                prefixItemsAndItems:
+                  type: array
+                  prefixItems:
+                    - type: string
+                      const: "prefix"
+                    - type: string
+                  items:
+                    type: number
+                prefixItemsOnly:
+                  type: array
+                  prefixItems:
+                    - type: string
+                    - type: number
+                  maxItems: 2
+      responses:
+        "200":
+          description: "Successful Response"
+          content:
+            "application/json":
+              schema:
+                type: string

end_to_end_tests/test-3-1-golden-record/test_3_1_features_client/api/prefix_items/post_prefix_items.py

@@ -0,0 +1,150 @@
+from http import HTTPStatus
+from typing import Any, Dict, Optional, Union, cast
+
+import httpx
+
+from ... import errors
+from ...client import AuthenticatedClient, Client
+from ...models.post_prefix_items_body import PostPrefixItemsBody
+from ...types import Response
+
+
+def _get_kwargs(
+    *,
+    body: PostPrefixItemsBody,
+) -> Dict[str, Any]:
+    headers: Dict[str, Any] = {}
+
+    _kwargs: Dict[str, Any] = {
+        "method": "post",
+        "url": "/prefixItems",
+    }
+
+    _body = body.to_dict()
+
+    _kwargs["json"] = _body
+    headers["Content-Type"] = "application/json"
+
+    _kwargs["headers"] = headers
+    return _kwargs
+
+
+def _parse_response(*, client: Union[AuthenticatedClient, Client], response: httpx.Response) -> Optional[str]:
+    if response.status_code == HTTPStatus.OK:
+        response_200 = cast(str, response.json())
+        return response_200
+    if client.raise_on_unexpected_status:
+        raise errors.UnexpectedStatus(response.status_code, response.content)
+    else:
+        return None
+
+
+def _build_response(*, client: Union[AuthenticatedClient, Client], response: httpx.Response) -> Response[str]:
+    return Response(
+        status_code=HTTPStatus(response.status_code),
+        content=response.content,
+        headers=response.headers,
+        parsed=_parse_response(client=client, response=response),
+    )
+
+
+def sync_detailed(
+    *,
+    client: Union[AuthenticatedClient, Client],
+    body: PostPrefixItemsBody,
+) -> Response[str]:
+    """
+    Args:
+        body (PostPrefixItemsBody):
+
+    Raises:
+        errors.UnexpectedStatus: If the server returns an undocumented status code and Client.raise_on_unexpected_status is True.
+        httpx.TimeoutException: If the request takes longer than Client.timeout.
+
+    Returns:
+        Response[str]
+    """
+
+    kwargs = _get_kwargs(
+        body=body,
+    )
+
+    response = client.get_httpx_client().request(
+        **kwargs,
+    )
+
+    return _build_response(client=client, response=response)
+
+
+def sync(
+    *,
+    client: Union[AuthenticatedClient, Client],
+    body: PostPrefixItemsBody,
+) -> Optional[str]:
+    """
+    Args:
+        body (PostPrefixItemsBody):
+
+    Raises:
+        errors.UnexpectedStatus: If the server returns an undocumented status code and Client.raise_on_unexpected_status is True.
+        httpx.TimeoutException: If the request takes longer than Client.timeout.
+
+    Returns:
+        str
+    """
+
+    return sync_detailed(
+        client=client,
+        body=body,
+    ).parsed
+
+
+async def asyncio_detailed(
+    *,
+    client: Union[AuthenticatedClient, Client],
+    body: PostPrefixItemsBody,
+) -> Response[str]:
+    """
+    Args:
+        body (PostPrefixItemsBody):
+
+    Raises:
+        errors.UnexpectedStatus: If the server returns an undocumented status code and Client.raise_on_unexpected_status is True.
+        httpx.TimeoutException: If the request takes longer than Client.timeout.
+
+    Returns:
+        Response[str]
+    """
+
+    kwargs = _get_kwargs(
+        body=body,
+    )
+
+    response = await client.get_async_httpx_client().request(**kwargs)
+
+    return _build_response(client=client, response=response)
+
+
+async def asyncio(
+    *,
+    client: Union[AuthenticatedClient, Client],
+    body: PostPrefixItemsBody,
+) -> Optional[str]:
+    """
+    Args:
+        body (PostPrefixItemsBody):
+
+    Raises:
+        errors.UnexpectedStatus: If the server returns an undocumented status code and Client.raise_on_unexpected_status is True.
+        httpx.TimeoutException: If the request takes longer than Client.timeout.
+
+    Returns:
+        str
+    """
+
+    return (
+        await asyncio_detailed(
+            client=client,
+            body=body,
+        )
+    ).parsed

end_to_end_tests/test-3-1-golden-record/test_3_1_features_client/models/__init__.py

@@ -1,5 +1,9 @@
 """Contains all the data models used in inputs/outputs"""
 
 from .post_const_path_body import PostConstPathBody
+from .post_prefix_items_body import PostPrefixItemsBody
 
-__all__ = ("PostConstPathBody",)
+__all__ = (
+    "PostConstPathBody",
+    "PostPrefixItemsBody",
+)

end_to_end_tests/test-3-1-golden-record/test_3_1_features_client/models/post_prefix_items_body.py

@@ -0,0 +1,103 @@
+from typing import Any, Dict, List, Literal, Type, TypeVar, Union, cast
+
+from attrs import define as _attrs_define
+from attrs import field as _attrs_field
+
+from ..types import UNSET, Unset
+
+T = TypeVar("T", bound="PostPrefixItemsBody")
+
+
+@_attrs_define
+class PostPrefixItemsBody:
+    """
+    Attributes:
+        prefix_items_and_items (Union[Unset, List[Union[Literal['prefix'], float, str]]]):
+        prefix_items_only (Union[Unset, List[Union[float, str]]]):
+    """
+
+    prefix_items_and_items: Union[Unset, List[Union[Literal["prefix"], float, str]]] = UNSET
+    prefix_items_only: Union[Unset, List[Union[float, str]]] = UNSET
+    additional_properties: Dict[str, Any] = _attrs_field(init=False, factory=dict)
+
+    def to_dict(self) -> Dict[str, Any]:
+        prefix_items_and_items: Union[Unset, List[Union[Literal["prefix"], float, str]]] = UNSET
+        if not isinstance(self.prefix_items_and_items, Unset):
+            prefix_items_and_items = []
+            for prefix_items_and_items_item_data in self.prefix_items_and_items:
+                prefix_items_and_items_item: Union[Literal["prefix"], float, str]
+                prefix_items_and_items_item = prefix_items_and_items_item_data
+                prefix_items_and_items.append(prefix_items_and_items_item)
+
+        prefix_items_only: Union[Unset, List[Union[float, str]]] = UNSET
+        if not isinstance(self.prefix_items_only, Unset):
+            prefix_items_only = []
+            for prefix_items_only_item_data in self.prefix_items_only:
+                prefix_items_only_item: Union[float, str]
+                prefix_items_only_item = prefix_items_only_item_data
+                prefix_items_only.append(prefix_items_only_item)
+
+        field_dict: Dict[str, Any] = {}
+        field_dict.update(self.additional_properties)
+        field_dict.update({})
+        if prefix_items_and_items is not UNSET:
+            field_dict["prefixItemsAndItems"] = prefix_items_and_items
+        if prefix_items_only is not UNSET:
+            field_dict["prefixItemsOnly"] = prefix_items_only
+
+        return field_dict
+
+    @classmethod
+    def from_dict(cls: Type[T], src_dict: Dict[str, Any]) -> T:
+        d = src_dict.copy()
+        prefix_items_and_items = []
+        _prefix_items_and_items = d.pop("prefixItemsAndItems", UNSET)
+        for prefix_items_and_items_item_data in _prefix_items_and_items or []:
+
+            def _parse_prefix_items_and_items_item(data: object) -> Union[Literal["prefix"], float, str]:
+                prefix_items_and_items_item_type_0 = cast(Literal["prefix"], data)
+                if prefix_items_and_items_item_type_0 != "prefix":
+                    raise ValueError(
+                        f"prefixItemsAndItems_item_type_0 must match const 'prefix', got '{prefix_items_and_items_item_type_0}'"
+                    )
+                return prefix_items_and_items_item_type_0
+                return cast(Union[Literal["prefix"], float, str], data)
+
+            prefix_items_and_items_item = _parse_prefix_items_and_items_item(prefix_items_and_items_item_data)
+
+            prefix_items_and_items.append(prefix_items_and_items_item)
+
+        prefix_items_only = []
+        _prefix_items_only = d.pop("prefixItemsOnly", UNSET)
+        for prefix_items_only_item_data in _prefix_items_only or []:
+
+            def _parse_prefix_items_only_item(data: object) -> Union[float, str]:
+                return cast(Union[float, str], data)
+
+            prefix_items_only_item = _parse_prefix_items_only_item(prefix_items_only_item_data)
+
+            prefix_items_only.append(prefix_items_only_item)
+
+        post_prefix_items_body = cls(
+            prefix_items_and_items=prefix_items_and_items,
+            prefix_items_only=prefix_items_only,
+        )
+
+        post_prefix_items_body.additional_properties = d
+        return post_prefix_items_body
+
+    @property
+    def additional_keys(self) -> List[str]:
+        return list(self.additional_properties.keys())
+
+    def __getitem__(self, key: str) -> Any:
+        return self.additional_properties[key]
+
+    def __setitem__(self, key: str, value: Any) -> None:
+        self.additional_properties[key] = value
+
+    def __delitem__(self, key: str) -> None:
+        del self.additional_properties[key]
+
+    def __contains__(self, key: str) -> bool:
+        return key in self.additional_properties

openapi_python_client/parser/properties/list_property.py

@@ -58,12 +58,28 @@ def build(
         """
         from . import property_from_data
 
-        if data.items is None:
-            return PropertyError(data=data, detail="type array must have items defined"), schemas
+        if data.items is None and not data.prefixItems:
+            return (
+                PropertyError(
+                    data=data,
+                    detail="type array must have items or prefixItems defined",
+                ),
+                schemas,
+            )
+
+        items = data.prefixItems or []
+        if data.items:
+            items.append(data.items)
+
+        if len(items) == 1:
+            inner_schema = items[0]
+        else:
+            inner_schema = oai.Schema(anyOf=items)
+
         inner_prop, schemas = property_from_data(
             name=f"{name}_item",
             required=True,
-            data=data.items,
+            data=inner_schema,
             schemas=schemas,
             parent_name=parent_name,
             config=config,

openapi_python_client/schema/openapi_schema_pydantic/schema.py

@@ -43,6 +43,7 @@ class Schema(BaseModel):
     anyOf: List[Union[Reference, "Schema"]] = Field(default_factory=list)
     schema_not: Optional[Union[Reference, "Schema"]] = Field(default=None, alias="not")
     items: Optional[Union[Reference, "Schema"]] = None
+    prefixItems: Optional[List[Union[Reference, "Schema"]]] = Field(default_factory=list)
     properties: Optional[Dict[str, Union[Reference, "Schema"]]] = None
     additionalProperties: Optional[Union[bool, Reference, "Schema"]] = None
     description: Optional[str] = None