refactor(angular): simplify lazy table initialization - #6560
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ChangesLazy table initialization
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🔵 Low · up to The refactor changes lazy table proxy behavior: callable initializer values would be returned as non-callable proxies, and reflective property descriptors may be inaccurate. These bounded correctness risks should have explicit owner follow-up, but the change remains mergeable. Sequence Diagram(s)sequenceDiagram
participant AngularComponent
participant injectTable
participant injectLazyInit
participant TableInstance
participant DestroyRef
AngularComponent->>injectTable: request table instance
injectTable->>injectLazyInit: create lazy table proxy
AngularComponent->>injectLazyInit: access table property
injectLazyInit->>TableInstance: initialize table once
injectLazyInit->>DestroyRef: register cleanup
injectTable->>TableInstance: update options through proxy
DestroyRef->>injectLazyInit: destroy injection context
injectLazyInit->>TableInstance: invoke unmount cleanup
Possibly related PRs
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Inline comments:
In `@packages/angular-table/src/lazySignalInitializer.ts`:
- Around line 6-13: Update lazyInit and its Proxy construction so callable lazy
values use a callable proxy target, or explicitly reject/exclude callable values
from the lazyInit<T extends object> contract; do not rely on the apply trap with
the current non-callable target. Add a test covering the selected callable-value
behavior.
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.changeset/lazy-tables-initialize.mdpackages/angular-table/src/injectTable.tspackages/angular-table/src/lazySignalInitializer.tspackages/angular-table/tests/injectTable.test.tspackages/angular-table/tests/lazy-init.test.ts
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I am not sure if removing the ‘initialized’ boolean is fine. I mean, everything should work as is but I’ve introduced it to avoid a forced table initialization by accessing the property during the component destruction. I guess something like this happen
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True. I got a I changed it such that the lazy function registers a cleanup callback only when the object has been initialized. This will get the same error when the table is read earlier that expected (like |
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Inline comments:
In `@packages/angular-table/src/injectLazyInit.ts`:
- Line 28: Restrict the generic constraint in injectLazyInit so callable
function types are excluded, matching the non-callable {} Proxy target. Preserve
lazy initialization behavior for ordinary object types and ensure the public
type signature no longer permits function-valued results.
- Around line 38-43: Update getOwnPropertyDescriptor() to retrieve and return
the corresponding descriptor from the initialized object, while forcing
configurable to true for the proxy target’s invariants. Preserve the source
descriptor’s value, accessors, and enumerable setting.
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packages/angular-table/src/injectLazyInit.tspackages/angular-table/src/injectTable.tspackages/angular-table/src/lazySignalInitializer.tspackages/angular-table/tests/injectTable.test.tspackages/angular-table/tests/lazy-init.test.ts
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- packages/angular-table/src/lazySignalInitializer.ts
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- packages/angular-table/src/injectTable.ts
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@benjavicente So I've thinked about it and I'm a bit doubtful about the destroy behavior. My latest suggestion added destroyRef.onDestroy(() => {
setTimeout(() => {
lazy.something
})
})In my opinion that's not an impossible use case since someone may run an http call or something else async during destroy, and access to the table (while not already constructed) My doubt is that we prevent the callback registration, but still the table has been created. I've pushed a new commit in your branch with those edits:
I’m not totally convinced, so I’d like to hear what you think |
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Inline comments:
In `@packages/angular-table/tests/lazy-init.test.ts`:
- Around line 75-76: Update the assertions in the lazy initialization test to
use not.toHaveBeenCalled() for both initializer and cleanup, ensuring the test
rejects any unexpected calls rather than only exactly one call.
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I think the timing issues of input signals, destroy ref and effects is really annoying 😅 It looks ok, not as simple as I expected but seems to cover all of the annoying edge cases. The only change I see that we should also take is changing |
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@benjavicente As I remember btw: e290a3b |
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Co-authored-by: Riccardo Perra <riccardo.perra@icloud.com>
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🎯 Changes
This can be considered a continuation of #6534.
I saw 2 simplification opportunities in that PR:
previousOptionsisn't needed because the signal will be considered the same withObject.istableOptionsUpdateeffectwill initialize the object so the inner effect is redundant. The timing of when it is initialized is the same since those 2 effects were run together. The object will always be initialized after effect runs. Considering all of that, returning an object holding the initialized state and the raw value isn't needed. Callinguntracked(object)every time could be slower but it isn't in a hot path.applytrap for the proxy since that will never be reached, and shouldn't be necessary for the input signal workaround.✅ Checklist
pnpm run test:pr.🚀 Release Impact
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