Make extend() method usable with behaviors.

[mjauvin]

Replaces #112

Model::extend(function ($model) {
    $model->behaviorMethodAvailable();
}, after: true);

Related: https://github.com/wintercms/docs/pull/98

[bennothommo]

@mjauvin I've tweaked the property names and did some clean up of the Extendable trait. Feel free to revert if you disagree with it all :)

[mjauvin]

So, who's in favor of merging this? Or something similar but through a seperate dedicated method ( e.g. extendPostBehavior() )

[LukeTowers]

@mjauvin are you needing this in 1.2.1 or are you fine with waiting for 1.2.2?

[mjauvin]

@LukeTowers I'm fine to wait for 1.2.2, which is why I moved it there.

[mjauvin]

Should I create a PR to the docs repo documenting this?

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[bennothommo]

Just to note - this PR could be implemented via https://github.com/wintercms/storm/pull/134 instead if we wanted to go down that route.

@mjauvin's use case could be simply extending a particular instance of the model locally via $model->extend(), which happens after instantiation and so other methods created by behaviors or other extensions would already be available.

[mjauvin]

Just to note - this PR could be implemented via #134 instead if we wanted to go down that route.

@mjauvin's use case could be simply extending a particular instance of the model locally via $model->extend(), which happens after instantiation and so other methods created by behaviors or other extensions would already be available.

@bennothommo are you saying I could do:

MyModel::extend(function () {
    $this->extend(function () {
        $this->behaviorMethodAvailable();
    });
}, true);

And that $this->behaviorMethodAvailbale() call would work?

[mjauvin]

Close in favor of #134.