def test_openapi():
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    openapi_schema = response.json()

    assert openapi_schema["components"]["schemas"]["MyModel"]["description"] == (
        "A model with a form feed character in the title.\n"

from fastapi import FastAPI
from pydantic.v1 import BaseModel


class Item(BaseModel):
    name: str
    description: str | None = None
    size: float


app = FastAPI()


@app.post("/items/")
async def create_item(item: Item) -> Item:

    for item_def in cast(dict[str, dict[str, Any]], definitions).values():
        if "description" in item_def:
            item_description = cast(str, item_def["description"]).split("\f")[0]
            item_def["description"] = item_description
    new_mapping, new_definitions = _remap_definitions_and_field_mappings(
        model_name_map=model_name_map,

                                "application/json": {
                                    "schema": {},
                                },
                            },
                            "description": "Successful Response",
                        },
                    },
                    "summary": "Get Legacy Data",
                },
            },
        },

<project>
  <modelVersion>4.0.0</modelVersion>
  <groupId>org.apache.maven</groupId>
  <artifactId>maven</artifactId>
  <packaging>pom</packaging>
  <name>Maven</name>
  <version>2.0</version>

                    "summary": "Read Items",
                    "operationId": "read_items_items__get",
                    "responses": {
                        "200": {
                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        }
                    },
                }
            }
        },

**FastAPI** generates a "schema" with all your API using the **OpenAPI** standard for defining APIs.

#### "Schema" { #schema }

A "schema" is a definition or description of something. Not the code that implements it, but just an abstract description.

#### API "schema" { #api-schema }

from typing import Union

from fastapi import FastAPI
from pydantic.v1 import BaseModel


class Item(BaseModel):
    name: str
    description: Union[str, None] = None
    size: float


app = FastAPI()


@app.post("/items/")
async def create_item(item: Item) -> Item:

from fastapi import FastAPI
from pydantic import BaseModel


class Item(BaseModel):
    name: str
    description: str | None = None
    price: float
    tax: float | None = None


app = FastAPI()


@app.put("/items/{item_id}")
async def update_item(item_id: int, item: Item):

plugins {
    `kotlin-dsl`
}

description = "Provides plugins for configuring miscellaneous things (repositories, reproducibility, minify)"

group = "gradlebuild"

dependencies {
    api("gradlebuild:build-environment")
    api(platform(projects.buildPlatform))

    implementation("com.google.guava:guava") {
        because("Used by class analysis")
    }
    implementation("org.ow2.asm:asm") {
        because("Used by class analysis")