Hi,
I have a case where I need to create a new node (N) as a child of a node (P) only if the existing set of children satisfies a certain condition. In my code I was planning to fetch the list of children (along with the parent's cversion), verify if the condition on the existing set of children allows me to add a new node, and then in a multi() invocation create a child only if the cversion of the parent is the same as what I had witnessed before.
However, I see that the Op.Check operation only allows me to check the data version of a node and not the cversion.
I see that a slightly more expensive work-around would be to make sure that every mutation that adds or removes children to/from P also makes a data change to P so that I maintain the invariant that cversion == version for P and then just use Op.Check.
Is there a better way to solve my problem? Thanks, Vinayak
