What is the best way to implement a decision tree using React Query Builder?

[jimmyzzxhlh]

I'm using React Query Builder to build a rule engine to evaluate a bunch of rules and then define a result (e.g. a number or a percentage). This works great for simple rules evaluation, but if I need something like IF A THEN 1 ELSE 2, then I have to create 2 different rules: IF A THEN 1 and IF NOT A THEN 2, which can be complicated if the condition is not trivial.

Any recommendations in terms of how I can leverage React Query Builder to build a decision tree? Appreciate any thoughts!

[jakeboone02]

Generically, would your use case ever be more complex than top-level if-then-else? For example, would it need to handle else-if (IF A THEN 1 ELSE IF B THEN 2 ELSE 3)? And would it need to handle nested if-else branches? Just trying to get an idea of the scale of the issue.

[jimmyzzxhlh]

For my use case having support for the basic ELSE would solve 80% of the problems, and if we can nest if/else that'd solve the rest of the 20% complicated cases.

Right now the main issue is that A can be a combination of multiple conditions. So creating an extra NOT A rule to address the else condition is not intuitive and harder to maintain.

[jakeboone02]

I have some new thoughts on this topic. Please see #919 (comment).