I guess the solution is to use :hidden as the field type, and set a default

there are other methods, but this is the way we'd do it

<@656195995918401591> we have the community help sections where people normaly ask for help.

There are [`readonly`](https://docs.avohq.io/2.0/field-options.html#readonly) and [`disable`](https://docs.avohq.io/2.0/field-options.html#disabled) field's option. You're right, `readonly` will not be considered on the submission, howver you can use `disable` option in this cases, it will act just as the `readonly` but the value will be assigned to the record. Notice that this open a security breach on your app and a bad actor can modify the value of the disabled field directly on the DOM and that value will be assigned to the record! So use it with precaution.