> For the complete documentation index, see [llms.txt](https://docs.tutim.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tutim.io/api-reference/fields/nested-children.md).

# Object

## Overview

A nested set of fields for use with `InputType.Object` fields. This allows you to group related form fields together and treat them as a single field.

In order to use an object field, add `children` and `type: InputType.Object` to your `FieldConfig`.

```jsx
children: { fields: FieldConfig[] },
type: InputType.Object
```

### Interface

```typescript
interface FieldConfig {
  key: string;
  type: InputType.Object;
  children: { fields: FieldConfig[] };
  label?: string;
  isDisabled?: boolean;
  isRequired?: boolean;
  defaultValue?: any;
}
```

* `key`: A unique identifier for the field.
* `type`: The type of input to use for the field, as specified by the `InputType` enumeration.
* \`\`[`children`](/api-reference/field-config.md#children): A nested set of fields for use with `InputType.Object` fields.
* `label`: (optional) The label to display for the field.
* `isDisabled`: (optional) A boolean value indicating whether the field should be disabled.
* `isRequired`: (optional) A boolean value indicating whether the field is required.
* `defaultValue`: (optional) The default value for the field.

### Example

Here is an example of how the `children` property can be used in an `FieldConfig` object:

```typescript
const validationForm: FormConfig = {
  fields: [
    {
      key: "value",
      label: "Value",
      type: InputType.Number,
    },
    {
      key: "message",
      label: "Message",
      type: InputType.Text,
    },
  ],
};

export const validationsFormConfig: FormConfig = {
  fields: [
    {
      key: "minLength",
      label: "Min Length Validation",
      type: InputType.Object,
      children: validationForm,
    },
    {
      key: "maxLength",
      label: "Max Length",
      type: InputType.Object,
      children: validationForm,
    },
  ],
};
```

In this example, the `validationForm` object represents a group of fields that are used to configure a minimum length validation. This group of fields is then reused for the `minLength` and `maxLength` fields, which are both of `InputType.Object` type.

### Example Output (form submission)

```javascript
{
  minLength: {
    value: 3,
    message: 'Minimum 3 letters',
  },
  maxLength: {
    value: 50,
    message: 'Maximum 50 letters',
  }
}
```


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