"Tree with nested nodes" example from https://material.angular.io/components/tree/overview fails

[sneurlax]

Bug:

The "Tree with nested nodes" example from https://material.angular.io/components/tree/overview fails for both Google Chrome Version 67.0.3396.99 (Official Build) (64-bit) and Firefox Quantum 61.0.1 (64-bit) with respective errors:

main.620a76fcfee14dac38ac.js:1 ERROR TypeError: this._tree.treeControl.getChildren(...).pipe is not a function
    at t.ngAfterContentInit (main.620a76fcfee14dac38ac.js:1)
...

and

ERROR TypeError: "this._tree.treeControl.getChildren(...).pipe is not a function"
ngAfterContentInit
...

That's all. Thought you ought to know!

EDIT: I'm on Linux x64.

[furevor]

also example with checkboxes fails..

I suppose this happens because of
constructor(transformFunction: (node: T, level: number) => F, getLevel: (node: F) => number, isExpandable: (node: F) => boolean, getChildren: (node: T) => Observable<T[]> | T[]);
changes in MatTreeFlattener class constructor.
At latest version there is no "| T[]" condition at last parameter

[jelbourn]

@devversion could you take a look at this one?

[devversion]

Just took a look and tried to reproduce it in our demo-app/examples and docs, but after clearing the cache on the docs everything seemed to work fine.

Can someone of you please verify if it was just a caching issue?

[furevor]

Now I can see that this example work fine (I haven't clean cache, just went to example page) on home page, but I can't examine it on my local version at now. I will try update to 6.3.3 tomorrow and response, but I have tried it before answer at this topic. I don't think this issue will disappear by magic :)

[devversion]

Yeah, it could be also just that the cached resources expired due to a 7d cache refresh.

Yesterday, when I briefly looked at the issue, I also reproduced that those demo's didn't work in the docs, but there was no docs update AFAIK. Let's see how it works out. Thanks for the update!

[furevor]

I have tried it on local code, but updated to 6.4.0 before. Seems to be ok!

[devversion]

Perfect. I assume this issue can be closed then. Let me know if you run into any further issues.

[furevor]

Yes! Thanks!

[Hypenate]

On StackBlitz I'm still facing this issue.

[peternewnham]

The StackBlitz link from the docs is still using 6.3.3. If you update it to use 6.4.0 it works as expected (https://stackblitz.com/edit/angular-znfg1m)

[rachid-boukhani]

On the doc (Nested tree section)
That private _getChildren = (node: FileNode) => node.children; should be
private _getChildren = (node: FileNode): Observable<FileNode[]> => observableOf(node.children);

Don't forget to import
import {BehaviorSubject, Observable, of as observableOf} from 'rxjs';

[angular-automatic-lock-bot]

This issue has been automatically locked due to inactivity.
Please file a new issue if you are encountering a similar or related problem.

Read more about our automatic conversation locking policy.

_{This action has been performed automatically by a bot.}