You can restrict some fields to add or edit using workflow restriction (included in the core)

Hi Klas!

thanks for your reply, 

I have been trying to do that but it is not working, may be I am not understanding the "restriction".

I have added a field in the form and want this field to be added in the form only for the first submission.

when editing, this field should not be there in the form.

I tried it in the form & content type by clicking "4" (access+restriction) then the field's restriction option I chose "workflow" then + and action= add.

but the field is still available in the editing form.

Please guide if I am missing something.

Best Regards.

I must admit that I always have to try to be sure it works as intended as I never know whether to tick reverse or not with restriciton. So I guess right way to read it in your case is "field is restricted (not shown) when action is add". So you need to change add to edit or click reverse (when action is NOT add ).