"content": {"application/json": {"schema": {}}},
                            },
                            "422": {
                                "description": "Validation Error",
                                "content": {
                                    "application/json": {
                                        "schema": {

                                    "schema": {"$ref": "#/components/schemas/Items"}
                                }
                            },
                            "required": True,
                        },
                    }
                }
            },
            "components": {
                "schemas": {
                    "Items": {
                        "title": "Items",

Directory for DBFlute client

manage.bat(sh) => 21 (jdbc):
A execution command of JDBC task
which gets your schema info and saves it to SchemaXML
located to the "schema" directory.
This task should be executed after ReplaceSchema task
and before other tasks(e.g. Generate, Document task).

manage.bat(sh) => 22 (doc):
A execution command of Document task
which creates documents, for example, SchemaHTML, HistoryHTML
to the "output/doc" directory.

                                "content": {
                                    "application/json": {
                                        "schema": {
                                            "$ref": "#/components/schemas/Rectangle"
                                        }
                                    }
                                },
                            }
                        },

* 把接收的数据赋值给参数 `item`。
    * 因为你把函数中的参数类型声明为 `Item`，所以还能获得所有属性及其类型的编辑器支持（补全等）。
* 为你的模型生成 [JSON Schema](https://json-schema.org) 定义，如果对你的项目有意义，还可以在其他地方使用它们。
* 这些 schema 会成为生成的 OpenAPI Schema 的一部分，并被自动文档的 <abbr title="User Interfaces - 用户界面">UIs</abbr> 使用。

## 自动文档 { #automatic-docs }

你的模型的 JSON Schema 会成为生成的 OpenAPI Schema 的一部分，并显示在交互式 API 文档中：

<img src="/img/tutorial/body/image01.png">

并且，还会用于需要它们的每个*路径操作*的 API 文档中：

#### «Схема» данных { #data-schema }

Термин «схема» также может относиться к форме некоторых данных, например, к содержимому JSON.

В таком случае это будут атрибуты JSON, их типы данных и т.п.

#### OpenAPI и JSON Schema { #openapi-and-json-schema }

}

// TableType table type interface
type TableType interface {
	Schema() string
	Name() string
	Type() string
	Comment() (comment string, ok bool)
}

// Migrator migrator interface
type Migrator interface {
	// AutoMigrate
	AutoMigrate(dst ...interface{}) error

	// Database
	CurrentDatabase() string
	FullDataTypeOf(*schema.Field) clause.Expr
	GetTypeAliases(databaseTypeName string) []string

	// Tables

Type\":\"date_histogram\"},\"y\":[{\"accessor\":1,\"format\":{\"id\":\"number\"},\"params\":{},\"aggType\":\"count\"}]}},\"aggs\":[{\"id\":\"1\",\"enabled\":true,\"type\":\"count\",\"schema\":\"metric\",\"params\":{\"customLabel\":\"Query Count\"}},{\"id\":\"2\",\"enabled\":true,\"type\":\"date_histogram\",\"schema\":\"segment\",\"params\":{\"field\":\"requestedAt\",\"timeRange\":{\"from\":\"now-2d\",\"to\":\"now\"},\"useNormalizedEsInterval\":true,\"interval\":\"s\",\"drop_partials\":false,\"mi...

)
def test_optional_str_schema(path: str):
    assert app.openapi()["paths"][path]["get"]["parameters"] == snapshot(
        [
            {
                "required": False,
                "schema": {
                    "anyOf": [{"type": "string"}, {"type": "null"}],
                    "title": "P",
                },
                "name": "p",
                "in": "cookie",
            }
        ]

                                "schema": {"title": "Facility Id", "type": "string"},
                            }
                        ],
                        "responses": {
                            "200": {
                                "content": {
                                    "application/json": {
                                        "schema": {