does a!localVariables() refresh local variables by default?

RE: does a!localVariables() refresh local variables by default?

Mike Schmitt — Fri, 30 Aug 2019 17:35:25 GMT

If you ever see a user clicking refresh once per second for 65 straight years, I hope you'll call me because that'd be a neat sight ;-)

RE: does a!localVariables() refresh local variables by default?

davel001150 — Fri, 30 Aug 2019 17:04:39 GMT

or maybe a boolean

local!flipflop: false()

then in your saveInto, a!save(local!flipflop, not(local!flipflop))

It's unlikely that you'd ever do the 2 billion plus iterations on a single run through the form needed to reach infinity, but if you ever did...

RE: does a!localVariables() refresh local variables by default?

Mike Schmitt — Fri, 30 Aug 2019 14:04:42 GMT

What we've been told officially is that refreshOnReferencedVarChange will cause variables to only refresh when a referenced variable changes, and not at any other time. So far I haven't seen anything that directly contradicts this. Setting refreshAlways to TRUE (which of course defaults to false) will mimic the old with() behavior.

A fun trick I've implemented is, if I want to have a "refresh" button/link, i.e. to update a grid with potential recent updates, i'll have it increment a local integer variable, and add that variable name to the refreshOnVarChange list for the query I want to refresh (instead of setting it to refreshAlways, for instance).

RE: does a!localVariables() refresh local variables by default?

Jose H. — Fri, 30 Aug 2019 13:57:55 GMT

Thanks for the reply, this is good to know. But to clarify something, if a local variable calling a query does not reference another variable, it will never refresh when interacting with the form, correct? or will still query the data again every time the user interacts with it?

RE: does a!localVariables() refresh local variables by default?

Mike Schmitt — Thu, 29 Aug 2019 19:40:05 GMT

To confirm, variables defined in a!localVariables(), but without using a!refreshVariable(), will be defined with all the default settings for a!refreshVariable() - this includes the parameter of "refreshOnReferencedVarChange" defaulting to TRUE. When changing over load() calls to a!localVariables(), this needs to be taken into account - mainly, if defining a local variable to hold the *original* value of some previously-defined value on the form, one would need to set refreshOnReferencedVarChange to FALSE. All in all, though, the new system should make most standard use cases easier (and it also makes some previously impossible ones possible).