---
type: ApiDoc
path: src/BelongsToRelationship.js
---
# BelongsToRelationship extends [Relationship](./Relationship.mdx)

A `BelongsToRelationship` instance is returned when you run \`modelInstance.belongsTo("Parent").

It is intended to return a single object, whereas `HasManyRelationship` returns an array.

```javascript
import { Model } from "active-mdx"

class Post extends Model {
  author() {
    // assumes a model class Author has been registered with the collection
    return this.belongsTo("Author", {
      id: (post) => post.meta.author
    })
  }
}
```

## API

### Instance Methods


#### fetchAll

#### fetch



### Instance Properties


#### type