Dynamic Methods/Rules

I need to create a product configurator, but according to the requirements, literally every product has a set of rules to validate it. The rules refer to the quantity of underlying components the configuration is made of. At the moment the way this is being handled is just storing the "formula" string in the db, and since the UI is in Excel, then when you call a configuration, it comes with the rules as well and you just append a "=" in front of it. Thus, the final product works when quantities or components change.

So I've seen a few similar type of questions being asked, and the answer always seemed to be UJS, however, this is stored in the app itself, correct? The challenge for me is to create a way I can replicate the开发者_运维知识库se rules depending on the product, and different products are beeing added all the time, changed, etc, so keeping it in the app to redeploy each time you want to change something seems a bit extreme!

Can anyone think of a good solution? Help!

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These are business rules so they'll need to be stored somewhere server-side (they could be mirrored in client-side code but storing them there exclusively is highly inadvisable ;). They could be represented as code, or configuration files, or in a database.

As you suggested, modeling frequently changing rules in source code makes your app brittle. I think the best storage option is your database.

If you need to implement a client-side behavior on a per-product basis, you could use AJAX to send a product ID out to a service which returns a configuration "package" to your (dumb) client.

Would that work? Sounds good to me, anyway. ;)