///

/// info

OpenAPI 3.1.0 (used since FastAPI 0.99.0) added support for `examples`, which is part of the **JSON Schema** standard.

Before that, it only supported the keyword `example` with a single example. That is still supported by OpenAPI 3.1.0, but is deprecated and is not part of the JSON Schema standard. So you are encouraged to migrate `example` to `examples`. 🤓

///

### Pydantic v1 and v2 on the same app { #pydantic-v1-and-v2-on-the-same-app }

It's **not supported** by Pydantic to have a model of Pydantic v2 with its own fields defined as Pydantic v1 models or vice versa.

```mermaid
graph TB
    subgraph "❌ Not Supported"
        direction TB
        subgraph V2["Pydantic v2 Model"]
            V1Field["Pydantic v1 Model"]

			return nil, config.ErrInvalidNumberOfErasureEndpoints(nil).Msg(msg)
		}

		// Final set size with all the symmetry accounted for.
		setSize = commonSetDriveCount(commonSize, setCounts)
	}

	// Check whether setSize is with the supported range.
	if !isValidSetSize(setSize) {

 * <ul>
 *   <li><strong>Unsupported combine.children Attributes</strong>: Changes 'override' to 'merge' (Maven 4 only supports 'append' and 'merge')</li>
 *   <li><strong>Unsupported combine.self Attributes</strong>: Changes 'append' to 'merge' (Maven 4 only supports 'override', 'merge', and 'remove')</li>

# Optional Path parameters are not supported...

# Currently, there is no way to pass multiple cookies with the same name.
# The only way to pass multiple values for cookie params is to serialize them using

	ctx := r.Context()

	objectAPI, _ := validateAdminReq(ctx, w, r, policy.DecommissionAdminAction)
	if objectAPI == nil {
		return
	}

	// Legacy args style such as non-ellipses style is not supported with this API.
	if globalEndpoints.Legacy() {
		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrNotImplemented), r.URL)
		return
	}

	z, ok := objectAPI.(*erasureServerPools)

{* ../../docs_src/pydantic_v1_in_v2/tutorial001_an_py310.py hl[1,4] *}

### Suporte do FastAPI ao Pydantic v1 no v2 { #fastapi-support-for-pydantic-v1-in-v2 }

Desde o FastAPI 0.119.0, há também suporte parcial ao Pydantic v1 a partir de dentro do Pydantic v2, para facilitar a migração para o v2.

The following arguments are supported:

* `allow_origins` - A list of origins that should be permitted to make cross-origin requests. E.g. `['https://example.org', 'https://www.example.org']`. You can use `['*']` to allow any origin.

В Pydantic **не поддерживается** ситуация, когда в одной модели Pydantic v2 используются поля, определённые как модели Pydantic v1, и наоборот.

```mermaid
graph TB
    subgraph "❌ Not Supported"
        direction TB
        subgraph V2["Pydantic v2 Model"]
            V1Field["Pydantic v1 Model"]
        end
        subgraph V1["Pydantic v1 Model"]
            V2Field["Pydantic v2 Model"]
        end