* OpenAPIの *path operation* に、レスポンス用の **JSON Schema** を追加します。
    * これは**自動ドキュメント**で使用されます。
    * 自動クライアントコード生成ツールでも使用されます。
* 返却データを Pydantic を使ってJSONに**シリアライズ**します。Pydantic は内部が**Rust**で実装されているため、**非常に高速**です。

しかし、最も重要なのは:

* 戻り値の型で定義された内容に合わせて、出力データを**制限しフィルタリング**します。
    * これは**セキュリティ**の観点で特に重要です。以下で詳しく見ていきます。

## `response_model`パラメータ { #response-model-parameter }

obanazawa.yamagata.jp
obi
obihiro.hokkaido.jp
obira.hokkaido.jp
objects.lpg.cloudscale.ch
objects.rma.cloudscale.ch
obl.ong
obninsk.su
observablehq.cloud
observer
obu.aichi.jp
obuse.nagano.jp
ocelot.mythic-beasts.com
ochi.kochi.jp
od.ua
odate.akita.jp
odawara.kanagawa.jp
odda.no
odesa.ua
odessa.ua
odo.br
odo.replit.dev
oe.yamagata.jp
of.by
of.je

 *
 * <p>See the Guava User Guide article on <a href=
 * "https://github.com/google/guava/wiki/CollectionUtilitiesExplained#multimaps">{@code
 * Multimaps}</a>.
 *
 * @author Jared Levy
 * @author Robert Konigsberg
 * @author Mike Bostock
 * @author Louis Wasserman
 * @since 2.0
 */
@GwtCompatible
public final class Multimaps {
  private Multimaps() {}

  /**

 *
 * <p>See the Guava User Guide article on <a href=
 * "https://github.com/google/guava/wiki/CollectionUtilitiesExplained#multimaps">{@code
 * Multimaps}</a>.
 *
 * @author Jared Levy
 * @author Robert Konigsberg
 * @author Mike Bostock
 * @author Louis Wasserman
 * @since 2.0
 */
@GwtCompatible
public final class Multimaps {
  private Multimaps() {}

  /**

obanazawa.yamagata.jp
obi
obihiro.hokkaido.jp
obira.hokkaido.jp
objects.lpg.cloudscale.ch
objects.rma.cloudscale.ch
obl.ong
obninsk.su
observablehq.cloud
observer
obu.aichi.jp
obuse.nagano.jp
ocelot.mythic-beasts.com
ochi.kochi.jp
od.ua
odate.akita.jp
odawara.kanagawa.jp
odda.no
odesa.ua
odessa.ua
odo.br
odo.replit.dev
oe.yamagata.jp
of.by
of.je

later.

  However, this bottle was NOT marked `poison,' so Alice ventured
to taste it, and finding it very nice, (it had, in fact, a sort
of mixed flavour of cherry-tart, custard, pine-apple, roast
turkey, toffee, and hot buttered toast,) she very soon finished
it off.

     *       *       *       *       *       *       *

         *       *       *       *       *       *

later.

  However, this bottle was NOT marked `poison,' so Alice ventured
to taste it, and finding it very nice, (it had, in fact, a sort
of mixed flavour of cherry-tart, custard, pine-apple, roast
turkey, toffee, and hot buttered toast,) she very soon finished
it off.

     *       *       *       *       *       *       *

         *       *       *       *       *       *

## 0.130.0 (2026-02-22)

### Features

* ✨ Serialize JSON response with Pydantic (in Rust), when there's a Pydantic return type or response model. PR [#14962](https://github.com/fastapi/fastapi/pull/14962) by [@tiangolo](https://github.com/tiangolo).
    * This results in 2x (or more) performance increase for JSON responses.

use the exponentiation by (p + 1) / 4 like // for the other primes. Instead, implement a variation of Tonelli–Shanks. // The constant-time implementation is adapted from Thomas Pornin's ecGFp5. // // https://github.com/pornin/ecgfp5/blob/82325b965/rust/src/field.rs#L337-L385 // p = q*2^n + 1 with q odd -> q = 2^128 - 1 and n = 96 // g^(2^n) = 1 -> g = 11 ^ q (where 11 is the smallest non-square) // GG[j] = g^(2^j) for j = 0 to n-1 p224GGOnce.Do(func() { p224GG = new([96]fiat.P224Element) for i :=...