Hi,

I am new to elasticsearch. I was trying to create a parent-child mapping 
where the children would be frequently added and removed.
Every Parent should have at least one child.

What I want to do is, if a child is deleted, I want to check if the parent 
has other children documents, and if not, delete that parent document.
How do I do this?

I was trying a delete by query, but I am not sure which query I should send.

Thanks for the help! :)

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