Uncaught Subscriptions field (.K) not defined for observable child Error only when using knockout.debug

[jerackista]

I have knockout 3.4.1 debug and reactor 1.3.7 and I get this error only when using debug version of knockout.

Uncaught Subscriptions field (.K) not defined for observable child
disposeWatcher @ knockout.reactor.js:233
watchChildren @ knockout.reactor.js:144
(anonymous) @ knockout.reactor.js:179
objectForEach @ knockout-3.4.0.js:62
watchChildren @ knockout.reactor.js:161
(anonymous) @ knockout.reactor.js:249

[bago]

First, try reactor 1.3.8 because I added support for KO 3.4.1 in 1.3.8.
Second: it's weird that you get a "K" error on the DEBUG version of knockout: I guess you missed something.. please double check what version of knockout you are using... try running "ko.DEBUG" in console to see if you really have a debug version of knockout and try "ko.version" to see the loaded version.

[Domysee]

I got the same error when disposing the subscription. Also only when using the debug version, but I'm using KO 3.4.0 and reactor 1.3.8.

[bago]

what does ko.DEBUG in console says?
can you create a jsbin/jsfiddle to show the isssue?

[Domysee]

ko.DEBUG is undefined.
I'll try to, but it may take a while, at the moment I don't have much time.
My fix for now is to just not use the debug version.

[bago]

Weird. KO 3.4.0 removed the ko.DEBUG variable... so we need a new way to detect debug vs compiled version... it seems that ko.subscriptions is a function defined only in DEBUG versions, so we may "stick" to that.

[bago]

Hi I "blindly released" 1.3.9 with a fix to support debug versions of KO 3.4.0 and 3.4.1, that seems to have removed the ko.DEBUG variable export.

Please let me know if this fix your issue.

[jerackista]

Yes it looks fine now for me. Thanx

[bago]

Thank you for reporting and for the final feedback!

[tamanugi]

I got same error when using with knockout 3.4.2.
guess subscriptionsField change to F.

     var subscriptionsField;
    switch (typeof ko.subscription == 'function' || ko.version) {
    case true: subscriptionsField = '_subscriptions'; break;
    case '3.0.0': subscriptionsField = 'F'; break;
    case '3.1.0': subscriptionsField = 'H'; break;
    case '3.2.0': subscriptionsField = 'M'; break;
    case '3.3.0': subscriptionsField = 'G'; break;
    case '3.4.0': subscriptionsField = 'K'; break;
    case '3.4.1': subscriptionsField = 'K'; break;
-   case '3.4.2': subscriptionsField = 'K'; break;
+  case '3.4.2': subscriptionsField = 'F'; break;
    default: throw 'Unsupported Knockout version. Only v3.0.0 to v3.4.2 are supported when minified. Current version is ' + ko.version;

After correcting as described above it worked properly