observeEvent does not trigger to changes in reactiveValues about shiny

[scal-o]

You can do this:

  observeEvent(
    lapply(names(test_vals), function(name) test_vals[[name]]()), {
    print("test_vals changed")
  })

There were two problems with your code. First of all, the reactiveValues object is not reactive itself, which means that it is not invalidated when one of its elements changes. From ?reactiveValues:

Note that values taken from the reactiveValues object are reactive, but the reactiveValues object itself is not.

The second problem is that the elements inside your reactiveValues are themselves reactive. In order to take an "invalidation dependency" on them, you have to call them to retrieve their value.

Hope this helps :)

[MohoWu]

Instead of the observeEvent can you do this?

lapply(isolate(names(test_vals)), function(x) {
      observeEvent(input[[x]], {
        print("test_vals changed")
      })
    })

[wch]

I believe you should be able to do:

observeEvent(reactiveValuesToList(test_vals), {
})

[shahronak47]

I believe you should be able to do:

observeEvent(reactiveValuesToList(test_vals), {
})

Sorry @wch , but that doesn't seem to work for me. It still behaves the same the message is printed only once upon launch.