* `tax: float = 10.5` has a default of `10.5`.
* `tags: List[str] = []` has a default of an empty list: `[]`.

but you might want to omit them from the result if they were not actually stored.

For example, if you have models with many optional attributes in a NoSQL database, but you don't want to send very long JSON responses full of default values.

### Use the `response_model_exclude_unset` parameter

        validateApi(body, messages -> {});
        body.crudMode = CrudMode.CREATE;
        final RelatedQuery relatedQuery = getRelatedQuery(body).map(entity -> {
            try {
                relatedQueryService.store(entity);
            } catch (final Exception e) {
                logger.warn("Failed to process a request.", e);

		Incoming:  globalConnStats.incInternodeInputBytes,
		Outgoing:  globalConnStats.incInternodeOutputBytes,
		TraceTo:   globalTrace,
		RoutePath: grid.RoutePath,
	})
	if err != nil {
		return err
	}
	globalGrid.Store(g)
	return nil
}

func initGlobalLockGrid(ctx context.Context, eps EndpointServerPools) error {
	hosts, local := eps.GridHosts()
	lookupHost := globalDNSCache.LookupHost

event_system = s3.meta.events
event_system.register_first('before-sign.s3.*', _add_header)

# List zip contents
response = s3.list_objects_v2(Bucket="your-bucket", Prefix="path/to/file.zip/")
print(response)

# Download data.csv stored in the zip file

istan","tanzania","thailand","timor-leste","togo","tokelau","tonga","trinidad and tobago","tunisia","turkey","turkmenistan","turks and caicos islands","tuvalu","uganda","ukraine","united arab emirates","united kingdom","united states minor outlying islands","united states","uruguay","uzbekistan","vanuatu","venezuela","vatican city","vietnam","virgin islands (british)","virgin islands (us)","wallis and futuna","western sahara","yemen","zambia","zimbabwe","åland islands"],errorMessage:"",errorMess...

        run: bash scripts/test.sh
        env:
          COVERAGE_FILE: coverage/.coverage.${{ runner.os }}-py${{ matrix.python-version }}
          CONTEXT: ${{ runner.os }}-py${{ matrix.python-version }}
      - name: Store coverage files
        uses: actions/upload-artifact@v4
        with:
          name: coverage-${{ matrix.python-version }}-${{ matrix.pydantic-version }}
          path: coverage
          include-hidden-files: true

            return null;
        }).orElseGet(() -> {
            throwValidationErrorApi(messages -> messages.addErrorsCrudFailedToCreateInstance(GLOBAL));
            return null;
        });
        protwordsService.store(body.dictId, entity);
        return asJson(
                new ApiResult.ApiUpdateResponse().id(String.valueOf(entity.getId())).created(true).status(ApiResult.Status.OK).result());
    }

	if err != nil {
		if t.opts.ReturnLastGood && t.val.Load() != nil {
			// Keep last good value, so update
			// does not return an error.
			return nil
		}
		return err
	}

	t.val.Store(&val)
	t.lastUpdateMs.Store(time.Now().UnixMilli())
	return nil

			break
		}
	}
}

func (r *rebalanceMeta) load(ctx context.Context, store objectIO) error {
	return r.loadWithOpts(ctx, store, ObjectOptions{})
}

func (r *rebalanceMeta) loadWithOpts(ctx context.Context, store objectIO, opts ObjectOptions) error {
	data, _, err := readConfigWithMetadata(ctx, store, rebalMetaName, opts)
	if err != nil {
		return err
	}

	if len(data) == 0 {
		return nil

        validateApi(body, messages -> {});
        body.crudMode = CrudMode.CREATE;
        final DuplicateHost duplicateHost = getDuplicateHost(body).map(entity -> {
            try {
                duplicateHostService.store(entity);
            } catch (final Exception e) {
                logger.warn("Failed to process a request.", e);