Thanks for responding, however...
Your expression below evaluates to true if IT IS NOT THE CASE THAT ALL THREE
ATTRIBUTES ARE EMPTY.
But I need an expression that evalutes to true if IT IS THE CASE THAT ALL THREE
ATTRIBUTES ARE NOT EMPTY.
There are two entirely different things.
Thus, if attr1 is set (thus is “not empty”), but the others are not (thus they
“are empty”), your expression evaluates to true.
But I need to ensure that NONE of the three “are empty”. I want an expression
that in the case given above evaluates to false.
Actually, I know how to make an expression that does what I need, however, it
is more confusing than it needs to be. The simpler expression that one would
desire to write REQUIRES that you offered a “notEmpty” function, thus would be
expressible as:
${allAttributes('attr1','attr2','attr3'):notEmpty()}
Again, this gives true only if all three attributes are not empty. The
expression you suggest gives true if even only ONE of the attributes is not
empty!
The lack of “notEmpty()” seems a very grave omission on your part.
And, you have no comment about the errors in your documentation for “isEmpty”
and “allAttributes” that I told you?
--Paul Nahay
From: Matthew Clarke [mailto:[email protected]]
Sent: Tuesday, March 22, 2016 11:07 AM
To: [email protected]; Paul Nahay
Subject: Re: notEmpty
Paul,
You can achieve what you are trying to do by using the not function.
let assume the attributes you want to check to make sure they have a vlaue set
are attr1, attr2, and attr3.
The expression would be
${allAttributes('attr1','attr2','attr3'):isEmpty():not()}
Thanks,
Matt
On Tue, Mar 22, 2016 at 9:46 AM, Paul Nahay <[email protected]> wrote:
https://nifi.apache.org/docs/nifi-docs/html/expression-language-guide.html#isempty
Why don't you have function "notEmpty"? This would be useful when combined with
"allAttributes".
I can't see any way, with your current set of functions, to determine that all
of a set of attributes are not empty, using the "allAttributes" function.
You have "isNull" and "notNull", why don't you have "notEmpty"?
Paul Nahay
[email protected]
