Added this custom field:
```
{
"mycompany.target-version": {
"name": "Target Version",
"type": "link",
"search": true
}
}
```
Set a task to "beta". Let daemons index it. Queried for:
```
constraints: {
"custom.mycompany.target-version": [
"beta"
]
}
```
Got just one result back.