* `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.

As in this case the function is not async, the right return type would be `Iterable[Item]`:

{* ../../docs_src/server_sent_events/tutorial001_py310.py ln[28:31] hl[29] *}

### No Return Type { #no-return-type }

You can also omit the return type. FastAPI will use the [`jsonable_encoder`](./encoder.md) to convert the data and send it.

{* ../../docs_src/server_sent_events/tutorial001_py310.py ln[34:37] hl[35] *}

## `ServerSentEvent` { #serversentevent }

{* ../../docs_src/stream_json_lines/tutorial001_py310.py ln[27:30] hl[28] *}

### No Return Type { #no-return-type }

You can also omit the return type. FastAPI will then use the [`jsonable_encoder`](./encoder.md) to convert the data to something that can be serialized to JSON and then send it as JSON Lines.

But the example here uses `PATCH` because it was created for these use cases.

///

/// note

Notice that the input model is still validated.

So, if you want to receive partial updates that can omit all the attributes, you need to have a model with all the attributes marked as optional (with default values or `None`).

      runtimeClassName: "{{ .Values.runtimeClassName }}"
      {{- end }}
      {{- if and .Values.securityContext.enabled .Values.persistence.enabled }}
      securityContext:
        {{ omit .Values.securityContext "enabled" | toYaml | nindent 8 }}
      {{- end }}
      {{ if .Values.serviceAccount.create }}
      serviceAccountName: {{ .Values.serviceAccount.name }}
      {{- end }}
      containers:

			}
		}
	default:
		tx.AddError(fmt.Errorf("unsupported select args %v %v", query, args))
	}

	return
}

// Omit specify fields that you want to ignore when creating, updating and querying
func (db *DB) Omit(columns ...string) (tx *DB) {
	tx = db.getInstance()

	if len(columns) == 1 && strings.ContainsRune(columns[0], ',') {

      {{- end }}
      {{- with .Values.postJob.tolerations }}
      tolerations: {{- toYaml . | nindent 8 }}
      {{- end }}
      {{- if .Values.postJob.securityContext.enabled }}
      securityContext: {{ omit .Values.postJob.securityContext "enabled" | toYaml | nindent 12 }}
      {{- end }}
      volumes:
        - name: etc-path
          emptyDir: {}
        - name: tmp
          emptyDir: {}

        yamlCompatTestSourceSet.getOutput().dir(transformCompatTestTask.map(RestCompatTestTransformTask::getOutputDirectory));

        // Grab the original rest resources locations so we can omit them from the compatibility testing classpath down below
        Provider<Directory> originalYamlSpecsDir = project.getTasks()
            .withType(CopyRestApiTask.class)

      runtimeClassName: "{{ .Values.runtimeClassName }}"
      {{- end }}
      {{- if and .Values.securityContext.enabled .Values.persistence.enabled }}
      securityContext:
        {{- omit .Values.securityContext "enabled" | toYaml | nindent 8 }}
      {{- end }}
      {{- if .Values.serviceAccount.create }}
      serviceAccountName: {{ .Values.serviceAccount.name }}
      {{- end }}
      containers:

		"Toys":      user2.Toys,
		"Company":   user2.Company,
		"Manager":   user2.Manager,
		"Team":      user2.Team,
		"Languages": user2.Languages,
		"Friends":   user2.Friends,
	}

	DB.Model(&result).Omit("name", "updated_at").Updates(updateValues)

	var result2 User