Convert date to string

Logstah version:7.4.0
When I used the follow command,it doesn't word:
mutate{
convert => {
"depDate"=>"string"
}
}
The depDate formate is '2020-03-12' or '-' or '2020-03-12/2020-03-18'

Hi

What do you mean when you say that it does not work? Please post the output from stdout{} output plugin.

Proper formatting makes everybody's life easier. Please use the "</>" tool when posting code, samples, etc.

Hope this helps.

Ahahahah you might as well have written "my pc doesn't turn on. What's happened?".

Context guys, context...