virtual
<pre><code>user.virtual('tasks', {
 ref:'Task',
 localField:'_id',
 foreignField:'owner'
})
</code></pre>get data
<pre><code>const tasks = await req.user.populate(
 'tasks'
 ).execPopulate()
</code></pre>

virtual

```
user.virtual('tasks', {
  ref:'Task',
  localField:'_id',
  foreignField:'owner'
})

``` 

get data


```
const tasks = await req.user.populate(
      'tasks'
    ).execPopulate()
``` 





Node virtual relationship