i think in compute you must put the row on it (both first_name and
last_name) and not sure it can handle string:
e.g. not tested
Field('personDisplayName', compute=lambda r: r[first_name] r[last_name])
another suggestion why not use default?
or maybe after_insert callback to update the persondisplayname with the
combination first_name and last_name value?
or maybe use on form validation function, assigned the value of
persondisplayname base on first_name and last_name form field?
best regards,
stifan
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