"title": "Item",
                    "required": IsOneOf(
                        ["name", "description", "price", "tax", "tags"],
                        # TODO: remove when deprecating Pydantic v1
                        ["name", "price"],
                    ),
                    "type": "object",
                    "properties": {
                        "name": {"title": "Name", "type": "string"},

你不应该固定`starlette`的版本。

不同版本的 **FastAPI** 将使用特定的较新版本的 Starlette。

因此，**FastAPI** 自己可以使用正确的 Starlette 版本。

## 关于 Pydantic

Pydantic 包含针对 **FastAPI** 的测试及其自己的测试，因此 Pydantic 的新版本（`1.0.0`以上）始终与 FastAPI 兼容。

你可以将 Pydantic 固定到适合你的`1.0.0`以上和`2.0.0`以下的任何版本。

例如：

````txt
pydantic>=1.2.0,<2.0.0

FROM python:3.9

RUN pip install httpx PyGithub "pydantic==2.0.2" pydantic-settings "pyyaml>=5.3.1,<6.0.0"

COPY ./app /app

                        "ctx": {"expected": "'created_at' or 'updated_at'"},
                    },
                ]
            }
        )
        | IsDict(
            # TODO: remove when deprecating Pydantic v1
            {
                "detail": [
                    {
                        "type": "value_error.number.not_le",
                        "loc": ["query", "limit"],

                "PlaneItem": {
                    "title": "PlaneItem",
                    "required": IsOneOf(
                        ["description", "type", "size"],
                        # TODO: remove when deprecating Pydantic v1
                        ["description", "size"],
                    ),
                    "type": "object",
                    "properties": {

                    "input": "nonregexquery",
                    "ctx": {"pattern": "^fixedquery$"},
                }
            ]
        }
    ) | IsDict(
        # TODO: remove when deprecating Pydantic v1
        {
            "detail": [
                {
                    "ctx": {"pattern": "^fixedquery$"},
                    "loc": ["query", "q"],

                "Item": {
                    "title": "Item",
                    "required": IsOneOf(
                        ["name", "description", "price", "tax"],
                        # TODO: remove when deprecating Pydantic v1
                        ["name", "price"],
                    ),
                    "type": "object",
                    "properties": {
                        "name": {"title": "Name", "type": "string"},

                "Item": {
                    "title": "Item",
                    "required": IsOneOf(
                        ["name", "description", "price", "tax"],
                        # TODO: remove when deprecating Pydantic v1
                        ["name", "price"],
                    ),
                    "type": "object",
                    "properties": {
                        "name": {"title": "Name", "type": "string"},

                    "input": "foo",
                    "ctx": {"expected": "'alexnet', 'resnet' or 'lenet'"},
                }
            ]
        }
    ) | IsDict(
        # TODO: remove when deprecating Pydantic v1
        {
            "detail": [
                {
                    "ctx": {"enum_values": ["alexnet", "resnet", "lenet"]},
                    "loc": ["path", "model_name"],

from fastapi import FastAPI, Form
from pydantic import BaseModel

app = FastAPI()


class FormData(BaseModel):
    username: str
    password: str


@app.post("/login/")
async def login(data: FormData = Form()):