CODEWITHSUNDEEP
javascriptknockout.jsobservablesubscribe
vladys.bo
vladys.bo

Reputation: 740

Subscribe on property in loop - KnockoutJs

I need help in subsribing on property in object. I don't know which property name will be and how much, I'm generating an object of properties according to data from the server.

I have code like:

viVm.requestData.ageGroups = {};

    var classificators = viVm.requestData.multiTrip() === 1
        ? viVm.classificators.ageGroups.multiTrip
        : viVm.classificators.ageGroups.singleTrip;

    classificators().forEach(function (entry, index) {
        var entry = ko.toJS(entry);
        var code = entry.code;

        viVm.requestData.ageGroups[code] = 0;

        viVm.requestData.ageGroups[code].subscribe(function (newValue) {
            validateAgeGroupValue(newValue, viVm.requestData.ageGroups[code]);
        });

    });

It sets up property and it's value tom0, but on .subscribe() step I get an error - viVm.requestData.ageGroups[code].subscribe is not a function

Could enybody explain what I do wrong and maybe offer some variant how to make it work? Thank you.

Upvotes: 0

Views: 176

Answers (1)

DaveB
DaveB

Reputation: 9530

The reason you are getting this error is because 0 (zero) is not a Knockout observable (function). You are trying to subscribe to an integer.

Try this:

        viVm.requestData.ageGroups[code] = ko.observable(0);

        viVm.requestData.ageGroups[code].subscribe(function (newValue) {
            validateAgeGroupValue(newValue, viVm.requestData.ageGroups[code]);
        });

Upvotes: 3

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