Logstash converting empty string into 0.0

I am converting an amount value into float as follows.

convert => {
 "AMT" => "float"


if "AMT"="" empty spcae ,it give 0.0 as the conversion output. this may mislead people since it is an amount field.

is there a way to avoid this problem..?

thanks for reading and helping.

Yes, a mutate will do that. You could make the mutate conditional upon AMT not being blank.

if [AMT] != "" {
1 Like

that works. Actually I have to convert more than 10 fields like this and checking each one of this doesnt look good to me. is there a way to do this using ruby filter with for loop on a list of fields to convert?

thanks for reading and helping.

Yes, you could do something like this:

    ruby {
        code => '
            [ "amount", "foo", "bar", "baz" ].each { |x|
                s = event.get(x)
                if s and (s.to_f.to_s == s) then
                    event.set(x, s.to_f)

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