How to create a form with an array of inputs

How would i go about creating a form that outputs:

```

```
or alternatively if thats not possible:

```

```
I need to add the array fields to the form dynamically based on the number of fields in the document i retrieve from mongo.

The data i need to bind to the form is in the following format:
```
{
name: 'xxxxx'
properties: [
{var1: 'yyy', var2: true },
{var1: 'zzz', var2: false}
]
}
```

I thought about creating a form using fields.array() for the properties attribute and using a custom widget that renders fields.object instead of fields.string but cant seem to get it working.

Is there a simple solution?