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Deprecate Array Observers #692

Merged
merged 3 commits into from
Jan 15, 2021
Merged

Deprecate Array Observers #692

merged 3 commits into from
Jan 15, 2021

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pzuraq
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@pzuraq pzuraq commented Dec 23, 2020


- While array observers are not used commonly in public code, they are used by
several commonly used addons, such as `ember-collection`,
`ember-data-model-fragments`, and `ember-light-table`. Deprecating them will
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Do we want to mention ember-data here? Seems like this might be an intermediate refactor for hasMany objects.

https://github.com/emberjs/data/blob/623145d0009d683a50468ba9961431ae76ae6df6/packages/model/addon/-private/system/many-array.js#L164

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Calling arrayContentWillChange and arrayContentDidChange is how an EmberArray triggers array observers. Internally, Ember Data does not rely on array observers at all, but it must call these methods in case others are using them.

This is a good point though, in that it's a similar situation to the one we're facing with implicit injections, Ember Data cannot remove these method calls until there are no more users, which means they cannot immediately comply with a deprecation. So, I think we should make it a phased deprecation, where arrayContentWillChange and arrayContentDidChange are fully deprecated in the next major version after array observers themselves are deprecated and removed.

@rwjblue
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rwjblue commented Jan 8, 2021

Moving into FCP

}

objectAtContent() {
return this._content.objectAt(index);
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index is not defined here.

@rwjblue rwjblue merged commit 68be337 into master Jan 15, 2021
@rwjblue rwjblue deleted the deprecate-array-observers branch January 15, 2021 19:12
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5 participants