hidden field on SQLForm

[Diego Tostes]

Hi,

is there a way to make a field hidden on SQLForm?

@auth.requires_login()
def ct_data_sharing():
        trial_id = int(request.vars["trial_id"])

    db.ct_data_sharing.trial_id.default = trial_id

    query = (db.ct_data_sharing.id > 0 and db.ct_data_sharing.trial_id == trial_id)


    form = SQLFORM.grid(query=query,
                links_in_grid=True,
                #field_id=db.rifas.id,
                csv=False,
                user_signature=False,
                ignore_rw=True,
                #fields=fields,
                #headers=headers,
                #orderby=default_sort_order,
                create=True,
                deletable=True,
                editable=True,
                details=False,
                #fields=fields_list,
                maxtextlength=70,paginate=40)


    return {"form": form}

I want to make th trial_id field hidden and with a default value equal trial_id

Is it possible?

rgds

diego