Custom Validator Directive won't fire when signal changes

[acalvomanxa]

Which @angular/* package(s) are the source of the bug?

forms

Is this a regression?

Yes

Description

As you can see in the image, I have an input with a custom validator and I send a signal into it.
Inside the validator, I get that value and use it in my validate function.

The validate function is only called when the input value that has the validator changes, but doesn't when the "entregaName" value changes. I understand that maybe this is not the correct way of doing it, however it's what seems common sense.

My use case is I want to validate an input whenever the users click a button. I can't use async validators because they would fire each time.

In the past I've used the hack of adding a space to the input and then deleting the space with a settimeout, thus activating the validation function, aswell as adding or removing errors from the control programatically, but it doesn't seem like the proper way of doing it.

Please provide a link to a minimal reproduction of the bug

No response

Please provide the exception or error you saw

No response

Please provide the environment you discovered this bug in (run ng version)

Angular CLI: 17.3.5
Node: 18.16.0
Package Manager: npm 9.5.1
OS: win32 x64

Angular: 17.3.5
... animations, cdk, cli, common, compiler, compiler-cli, core
... forms, google-maps, material, platform-browser
... platform-browser-dynamic, router

Package                         Version
---------------------------------------------------------
@angular-devkit/architect       0.1703.5
@angular-devkit/build-angular   17.3.5
@angular-devkit/core            17.3.5
@angular-devkit/schematics      17.3.5
@schematics/angular             17.3.5
rxjs                            7.8.1
typescript                      5.2.2
zone.js                         0.14.2

Anything else?

No response

[acalvomanxa]

Another hack I found is the following

[alxhub]

Validators are not integrated at all with signals and not expected to be reactive.