Readonly fields are not created in the registry

[wesleybl]

BUG/PROBLEM REPORT (OR OTHER COMMON ISSUE)

What I did:

I created an interface with a readonly field and registered it in the registry. The interface looks like this:

class IMyInterface(Interface):

    my_field = schema.TextLine(
        title=_("My Field"),
        readonly=True,
        default="My Field",
    )

I installed the profile that registers the interface.

What I expect to happen:

I hope the my_field field is created in the registry.

What actually happened:

The my_field field is not created in the registry. You can go to: Site Setup -> Configuration Registry and try to search the field. But he's not there

What version of Plone/ Addons I am using:

Plone 6.0.7

[davisagli]

What is a read-only field in the registry useful for?

[wesleybl]

What is a read-only field in the registry useful for?

In my case, it would be to show the value of a field of another record.