CODEWITHSUNDEEP
ember.js
Leon Dmello
Leon Dmello

Reputation: 138

Computed properties are not re-calculating when dependent oneWay CP updates

Lets say I have a oneWay CP which is initially bound to a model property (and is hence free to diverge if updated)

The CP can be set to values fixed & dynamic. I have some equal CPs which in turn rely on this oneWayCp changing

oneWayCp: oneWay('model.field')
isFixed: equal('oneWayCp', 'fixed').volatile().readOnly(),
isDynamic: equal('oneWayCp', 'dynamic').volatile().readOnly(),

I'm seeing a weird bug wherein isFixed & isDynamic don't update when oneWayCp is updated

Is this expected behavior ?

Upvotes: 1

Views: 49

Answers (1)

Lux
Lux

Reputation: 18240

Actually your problem is .volatile(). Basically this disables the update on dependency keys behaviour.

Here is a fixed twiddle.

So you should do this:

oneWayCp: oneWay('model.field')
isFixed: equal('oneWayCp', 'fixed').readOnly(),
isDynamic: equal('oneWayCp', 'dynamic').readOnly(),

Refer to the documentation:

It also does not automatically fire any change events. You must manually notify any changes if you want to observe this property.

Upvotes: 3

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