# /---------------------------------------------------------------------------
# sequenceMap: (NotRequired - Default map:{})
# 
# The relation mappings between sequence and table.
# If you don't specify the mappings, you cannot insert a record of the table by sequence. 
# The table names are treated as case insensitive.
# 
# Example:
# map:{
#     ; PURCHASE     = SEQ_PURCHASE
#     ; MEMBER       = SEQ_MEMBER
#     ; MEMBER_LOGIN = SEQ_MEMBER_LOGIN

from typing import Union

from fastapi import FastAPI, File, UploadFile

app = FastAPI()


@app.post("/files/")
async def create_file(file: Union[bytes, None] = File(default=None)):
    if not file:
        return {"message": "No file sent"}
    else:
        return {"file_size": len(file)}


@app.post("/uploadfile/")
async def create_upload_file(file: Union[UploadFile, None] = None):
    if not file:

            // Check if the specific option is explicitly set
            if (option.isPresent()) {
                return option.get();
            }

            // Apply default behavior: if no specific options are provided, use default
            if (options.all().isEmpty()
                    && options.infer().isEmpty()
                    && options.model().isEmpty()
                    && options.plugins().isEmpty()

    private static final ASN1ObjectIdentifier SPNEGO_OID = new ASN1ObjectIdentifier(SpnegoConstants.SPNEGO_MECHANISM);

    private ASN1ObjectIdentifier[] mechanisms;

    private int contextFlags;

    /**
     * Default constructor for NegTokenInit
     */
    public NegTokenInit() {
    }

    /**
     * Constructs a NegTokenInit with the specified parameters
     * @param mechanisms the array of supported authentication mechanisms

public class FailureUrlService {

    /** Logger instance for this class */
    private static final Logger logger = LogManager.getLogger(FailureUrlService.class);

    /**
     * Default constructor.
     */
    public FailureUrlService() {
        // Default constructor
    }

    /** Behavior class for FailureUrl entity operations */
    @Resource
    protected FailureUrlBhv failureUrlBhv;

            return MODEL_VERSION_4_1_0;
        } else if (MAVEN_4_0_0_NAMESPACE.equals(namespaceUri)) {
            return MODEL_VERSION_4_0_0;
        }

        // Default fallback
        return MODEL_VERSION_4_0_0;
    }

    /**
     * Checks if a model version is valid for upgrade operations.
     * Currently supports 4.0.0, 4.1.0, and 4.2.0.
     *

					return
				}
				z.MinioEnv[za0002] = za0003
			}
		case "Checksum":
			z.Checksum, err = dc.ReadString()
			if err != nil {
				err = msgp.WrapError(err, "Checksum")
				return
			}
		default:
			err = dc.Skip()
			if err != nil {
				err = msgp.WrapError(err)
				return
			}
		}
	}
	return
}

// EncodeMsg implements msgp.Encodable

Comme nous devons remplacer la valeur par défaut `None` dans la fonction par `Query()`, nous pouvons maintenant définir la valeur par défaut avec le paramètre `Query(default=None)`, il sert le même objectif qui est de définir cette valeur par défaut.

Donc :

```Python
q: Union[str, None] = Query(default=None)
```

... rend le paramètre optionnel, et est donc équivalent à :

```Python
q: Union[str, None] = None
```

from fastapi import FastAPI, Query

app = FastAPI()


@app.get("/items/")
async def read_items(q: str | None = Query(default=None, max_length=50)):
    results = {"items": [{"item_id": "Foo"}, {"item_id": "Bar"}]}
    if q:
        results.update({"q": q})

			if err != nil {
				err = msgp.WrapError(err, "Count")
				return
			}
		case "Bytes":
			z.Bytes, err = dc.ReadInt64()
			if err != nil {
				err = msgp.WrapError(err, "Bytes")
				return
			}
		default:
			err = dc.Skip()
			if err != nil {
				err = msgp.WrapError(err)
				return
			}
		}
	}
	return
}

// EncodeMsg implements msgp.Encodable
func (z RStat) EncodeMsg(en *msgp.Writer) (err error) {