Let's say I have a table like
db.define_table("phonebook",
Field("phonenumber", represent=lambda v,r: "secret" if r.secret==True
else v),
Field("secret","boolean", default=False)
)
The first part is simple: if I want to hide a phonenumber, I have to check
the secret field and instead of the phonenumber the word "secret" is
visible.
Now the second part: a phone number, which has been made secret, should not
be visible again. It should be possible to enter a new phonenumberor to
clear the field, but the secret-flag should only be writable, if
phonenumber is empty.
Field("secret", "boolean", writable=lambda v,r: (r.phonenumber=="") or
(v==False))
would do the job, but writable cann't be a lambda function - right?
Maybe I could use a second boolean field but it seems to become
complicated. Are there any ideas for a simple solution?
Regards, Martin
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