> For the complete documentation index, see [llms.txt](https://entity-factory.gitbook.io/entity-factory/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://entity-factory.gitbook.io/entity-factory/adapters/object-adaper.md).

# Object Adapter

The ObjectAdapter is used for creating mock data as plain javascript objects. It will generate sequential id's for objects to simulate data coming from a database.

## ObjectAdapter(\[opts])

```javascript
const objectAdapter = new ObjectAdapter();

// or

const objectAdapter = new ObjectAdaper({
    generateId: true,
    defaultIdAttribute: 'id',
    uuidPrimary: false,
});

const factory = new EntityFactory({
    adapter: objectAdapter,
});
```

* **opts**: optional
  * **generateId**: default **true**, used to enable or disable id generation

    by default. This can be overriden at the blueprint level.
  * **defaultIdAttribute**: default **id**, sets the default name of the id

    attribute that entity factory will generate if generateId is true.
  * **uuidPrimary**: default **false**, will generate a v4 UUID as the id

    when set to true intead of an incrementing id.

## Object Blueprint

**Available Options**

* **generateId**: overrides the default adapter setting for a particular entity.
* **idAttribute**: overrides the adapter setting to change the genrated id

  attribute name.
* **uuidPrimary**: overrides the adapter setting to use uuid's vs incrementing

  numeric ids.

```javascript
export class WidgetBlueprint extends ObjectBlueprint {
    constructor() {
        super();

        this.type(Widget);

        this.options({
            generateId: true,
            idAttribute: '_id',
            uuidPrimary: true,
        });
    }
}
```