Cannot read property '_formBuilder' of undefined

[Vladimir Drayling]

I'm submitting a...

[x] Bug report

Current behavior

I'm trying to save with forms manager the state of checkboxes in the table.

I have a list of users. When I click on a user, I then get a user's detail page (for simplicity some field are omitted). After changing the organisation ID in the mat-select, the customers appear with their rights in the table. After some change in the table, I then go back to the user's list and want to select the previous user in the list and then I get this error:

core.js:6014 ERROR Error: Uncaught (in promise): TypeError: Cannot read property '_formBuilder' of undefined
TypeError: Cannot read property '_formBuilder' of undefined
    at _createCustomerWithRights (user-edit.component.ts:117)
    at datorama-akita-ng-forms-manager.js:192
    at Array.forEach (<anonymous>)
    at datorama-akita-ng-forms-manager.js:192
    at Array.forEach (<anonymous>)
    at AkitaNgFormsManager.handleFormArray (datorama-akita-ng-forms-manager.js:183)
    at AkitaNgFormsManager.resolveStoreToForm (datorama-akita-ng-forms-manager.js:171)
    at AkitaNgFormsManager.upsert (datorama-akita-ng-forms-manager.js:94)
    at UserEditComponent.<anonymous> (user-edit.component.ts:75)
    at Generator.next (<anonymous>)
    at resolvePromise (zone-evergreen.js:797)
    at zone-evergreen.js:707
    at fulfilled (tslib.es6.js:70)
    at ZoneDelegate.invoke (zone-evergreen.js:359)
    at Object.onInvoke (core.js:39699)
    at ZoneDelegate.invoke (zone-evergreen.js:358)
    at Zone.run (zone-evergreen.js:124)
    at zone-evergreen.js:855
    at ZoneDelegate.invokeTask (zone-evergreen.js:391)
    at Object.onInvokeTask (core.js:39680)

Why is the this undefined? Oo
I thought that this is available right after the constructor was called.

Expected behavior

The forms manager should save the table's state (checked/unchecked checkboxes).

Minimal reproduction of the problem with instructions

My github repo

Environment

Angular version: 8.2.13

Browser:
- [x] Chrome (desktop) version 78.0.3904.97 (Official Build) (64-bit)
 
For Tooling issues:
- Node version: 12.13.0
- Platform: Win 10 x64

Thank you in advance!

Best regards
Vladimir

[Netanel Basal]

I can't debug it if it works on stackblitz

[Vladimir Drayling]

You can clone the GitHub repo. There is the error described above. Sorry for the ambiguousness

[Netanel Basal]

You need to use bind:
customersWithRights:this._createCustomerWithRights.bind(this)