你的 API 幾乎總是需要傳回**回應**本文。但用戶端不一定每次都要送出**請求本文**，有時只會請求某個路徑，可能帶一些查詢參數，但不會傳送本文。

要宣告**請求**本文，你會使用 [Pydantic](https://docs.pydantic.dev/) 模型，享受其完整的功能與優點。

/// info

要傳送資料，應使用下列其中一種方法：`POST`（最常見）、`PUT`、`DELETE` 或 `PATCH`。

在規範中，於 `GET` 請求中攜帶本文的行為是未定義的。不過，FastAPI 仍支援它，但僅適用於非常複雜／極端的情境。

由於不建議這麼做，使用 Swagger UI 的互動式文件在使用 `GET` 時不會顯示本文的文件，而且中間的代理伺服器也可能不支援。

///

## 匯入 Pydantic 的 `BaseModel` { #import-pydantics-basemodel }

## Handlers & Routes

Handlers have a predefined Handler ID.
In addition, there can be several *static* subroutes used to differentiate between different handlers of the same ID.
A subroute on a client must match a subroute on the server. So routes cannot be used for dynamic routing, unlike HTTP.

Handlers should remain backwards compatible. If a breaking API change is required, a new handler ID should be created.

## Setup & Configuration

	}

	ch, confirms, err := target.channel()
	if err != nil {
		return err
	}
	defer ch.Close()

	eventData, eErr := target.store.Get(key)
	if eErr != nil {
		// The last event key in a successful batch will be sent in the channel atmost once by the replayEvents()
		// Such events will not exist and wouldve been already been sent successfully.
		if os.IsNotExist(eErr) {
			return nil
		}
		return eErr
	}

wondered at this, but at the time it all seemed quite natural);
but when the Rabbit actually TOOK A WATCH OUT OF ITS WAISTCOAT-
POCKET, and looked at it, and then hurried on, Alice started to
her feet, for it flashed across her mind that she had never
before seen a rabbit with either a waistcoat-pocket, or a watch to
take out of it, and burning with curiosity, she ran across the

        return stopwordsService.getStopwordsFile(form.dictId).map(file -> {
            try (InputStream inputStream = form.stopwordsFile.getInputStream()) {
                file.update(inputStream);
            } catch (final IOException e) {
                logger.warn("Failed to process a request.", e);
                throwValidationError(messages -> messages.addErrorsFailedToUploadStopwordsFile(GLOBAL),

                            }]
                        }]
                        """
                )
            }
        ) {
            assertOutputContains("The following accessors were upgraded, but didn't match any removed/changed method:\n\ncom.example.Task#setSourceCompatibility(Ljava/lang/String;)V")
        }
    }

    @Test
    fun `should not fail if some method was upgraded and not removed but marked as kept`() {

   */
  private static int runSuppressionFailureTest(ByteSource in, ByteSink out) {
    try {
      in.copyTo(out);
      fail();
    } catch (IOException expected) {
      return expected.getSuppressed().length;
    }
    throw new AssertionError(); // can't happen
  }

  private static ByteSource newNormalByteSource() {

            "The remote system is not reachable by the transport.",
            "The layered file system driver for this I/O tag did not handle it when needed.",
            "No more files were found that match the file specification.", };

                                        + repository.getId() + "'");
                            }
                        }
                    }
                }
            }
        } catch (Exception e) {
            invalidMetadata(session, trace, metadata, repository, e);
            result.addException(e);
        }

        return (versioning != null) ? versioning : new Versioning();
    }

    end
    dep ->> operation: Run dependency, e.g. DB session
    opt raise
        operation -->> dep: Raise Exception (e.g. HTTPException)
        opt handle
            dep -->> dep: Can catch exception, raise a new HTTPException, raise other exception
        end
        handler -->> client: HTTP error response
    end

    operation ->> client: Return response to client