# Extra Models

Continuing with the previous example, it will be common to have more than one related model.

This is especially the case for user models, because:

* The **input model** needs to be able to have a password.
* The **output model** should not have a password.
* The **database model** would probably need to have a hashed password.

/// danger

Never store user's plaintext passwords. Always store a "secure hash" that you can then verify.

* Documentation automatique des modèles de données avec <a href="http://json-schema.org/" class="external-link" target="_blank"><strong>JSON Schema</strong></a> (comme OpenAPI est...

///

Dans OpenAPI, les chemins sont des ressources, tels que /users/ ou /items/, exposées par votre API, et les opérations sont les méthodes HTTP utilisées pour manipuler ces chemins, telles que GET, POST ou DELETE. Les operationId sont des chaînes uniques facultatives utilisées pour identifier une opération d'un chemin. Vous pouvez définir l'OpenAPI `operationId` à utiliser dans votre *opération de chemin* avec le paramètre `operation_id`.

				err = msgp.WrapError(err, "MetaSys")
				return
			}
			if z.MetaSys == nil {
				z.MetaSys = make(map[string][]byte, zb0002)
			} else if len(z.MetaSys) > 0 {
				for key := range z.MetaSys {
					delete(z.MetaSys, key)
				}
			}
			for zb0002 > 0 {
				zb0002--
				var za0002 string
				var za0003 []byte
				za0002, err = dc.ReadString()
				if err != nil {
					err = msgp.WrapError(err, "MetaSys")

	if err != nil {
		if err == errConfigNotFound {
			return u, errNoSuchUser
		}
		return u, err
	}

	if u.Credentials.IsExpired() {
		// Delete expired identity - ignoring errors here.
		iamOS.deleteIAMConfig(ctx, getUserIdentityPath(user, userType))
		iamOS.deleteIAMConfig(ctx, getMappedPolicyPath(user, userType, false))
		return u, errNoSuchUser
	}

	return nil
}

// DeleteFileHandler - delete a file.
func (s *storageRESTServer) DeleteFileHandler(p *DeleteFileHandlerParams) (grid.NoPayload, *grid.RemoteErr) {
	if !s.checkID(p.DiskID) {
		return grid.NewNPErr(errDiskNotFound)
	}
	return grid.NewNPErr(s.getStorage().Delete(context.Background(), p.Volume, p.FilePath, p.Opts))
}

// DeleteVersionsHandler - delete a set of a versions.

func loadAPIRequestsHTTPMetrics(ctx context.Context, m MetricValues, _ *metricsCache) error {
	// Collect node level S3 HTTP metrics.
	httpStats := globalHTTPStats.toServerHTTPStats(false)

	// Currently we only collect S3 API related stats, so we set the "type"
	// label to "s3".

	m.Set(apiRejectedAuthTotal, float64(httpStats.TotalS3RejectedAuth), "type", "s3")
	m.Set(apiRejectedTimestampTotal, float64(httpStats.TotalS3RejectedTime), "type", "s3")

                            // Select an appropriate available version from the (now restricted) range
                            // Note this version was selected before to get the appropriate POM
                            // But it was reset by the call to setVersionRange on restricting the version
                            ResolutionNode[] resetNodes = {previous, node};

		return err
	}

	if err = wc.Close(); err != nil {
		return err
	}

	// Persist to disk any caches.
	if err = gw.Sync(); err != nil {
		return err
	}

	// close everything before we delete.
	if err = gw.Close(); err != nil {
		return err
	}

	if err = r.Close(); err != nil {
		return err
	}

	// Attempt to remove after all fd's are closed.
	return os.Remove(oldLgFile)
}

        sb.append(dm).append(updatedBy);
        sb.append(dm).append(updatedTime);
        sb.append(dm).append(virtualHosts);
        if (sb.length() > dm.length()) {
            sb.delete(0, dm.length());
        }
        sb.insert(0, "{").append("}");
        return sb.toString();
    }

    // ===================================================================================