////

/// tip

You could use the same technique to extend the JSON Schema and add your own custom extra info.

For example you could use it to add metadata for a frontend user interface, etc.

///

/// info

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

	// AssociatedData is optional data that is cryptographically
	// associated with the generated data key. The same data
	// must be provided when decrypting an encrypted data key.
	//
	// Typically, associated data is some metadata about the
	// data key. For example, the name of the object for which
	// the data key is used.
	AssociatedData Context
}

// DecryptRequest is a structure containing fields
// and options for decrypting data.

// in 'pool.bin', this is eventually used for decommissioning the pool.
func (z *erasureServerPools) Init(ctx context.Context) error {
	// Load rebalance metadata if present
	if err := z.loadRebalanceMeta(ctx); err == nil {
		// Start rebalance routine if we can reload rebalance metadata.
		z.StartRebalance()
	}

	meta := poolMeta{}
	if err := meta.load(ctx, z.serverPools[0], z.serverPools); err != nil {
		return err
	}

	failOnErr(xl2.Load(trimmed))
	if len(xl2.data) != 0 {
		t.Fatal("data, was not trimmed, bytes left:", len(xl2.data))
	}
	// Corrupt metadata, last 5 bytes is the checksum, so go a bit further back.
	trimmed[len(trimmed)-10] += 10
	if err := xl2.Load(trimmed); err == nil {
		t.Fatal("metadata corruption not detected")
	}
}

// TestUsesDataDir tests xlMetaV2.UsesDataDir
func TestUsesDataDir(t *testing.T) {

type replicatedTargetInfo struct {
	Arn                   string
	Size                  int64
	Duration              time.Duration
	ReplicationAction     replicationAction // full or metadata only
	OpType                replication.Type  // whether incoming replication, existing object, healing etc..
	ReplicationStatus     replication.StatusType
	PrevReplicationStatus replication.StatusType

					}
					bootLogIf(GlobalContext, fmt.Errorf("Unable to list buckets to initialize bucket metadata sub-system: %w", err))
				}

				buckets = make([]string, len(bucketsList))
				for i := range bucketsList {
					buckets[i] = bucketsList[i].Name
				}
				break
			}
		})

		// Initialize bucket metadata sub-system.
		bootstrapTrace("globalBucketMetadataSys.Init", func() {

{* ../../docs_src/custom_request_and_route/tutorial001.py hl[18:26] *}

/// note | "Technical Details"

A `Request` has a `request.scope` attribute, that's just a Python `dict` containing the metadata related to the request.

A `Request` also has a `request.receive`, that's a function to "receive" the body of the request.

The `scope` `dict` and `receive` function are both part of the ASGI specification.

                moduleBaseDir.deleteRecursively()
            }
        }

        doLast {
            localRepository.get().file("org/gradle/${baseName.get()}/maven-metadata.xml").asFile.apply {
                writeText(readText().replace("\\Q<lastUpdated>\\E\\d+\\Q</lastUpdated>\\E".toRegex(), "<lastUpdated>${Year.now().value}0101000000</lastUpdated>"))
            }

	Message string
}

func (e NotImplemented) Error() string {
	return e.Message
}

// UnsupportedMetadata - unsupported metadata
type UnsupportedMetadata struct{}

func (e UnsupportedMetadata) Error() string {
	return "Unsupported headers in Metadata"
}

// isErrBucketNotFound - Check if error type is BucketNotFound.
func isErrBucketNotFound(err error) bool {

If you have a group of **cookies** that are related, you can create a **Pydantic model** to declare them. 🍪

This would allow you to **re-use the model** in **multiple places** and also to declare validations and metadata for all the parameters at once. 😎

/// note

This is supported since FastAPI version `0.115.0`. 🤓

///

/// tip

This same technique applies to `Query`, `Cookie`, and `Header`. 😎

///