Framework: Attributes not specified in component constructor are not available inside the class

[panda-madness]

• Laravel Version: 7.7.1
• PHP Version: 7.4.3
• Database Driver & Version: Not applicable

Description:

Currently, if you create a class based Blade component and pass it attributes, only attributes specified in the class constructor are available from the class itself, and the rest only from the template via the $attributes bag. I would imagine that them being available at some point in the component's class would be the expected behavior.

Steps To Reproduce:

Create a class component.

<div {{ $attributes }}>
    ...
</div>

class TestSubject extends Component
{
    public function __construct()
    {
        dump($this->attributes); // produces null, should be ['test1' => 'asd', 'test2' => 'asdads' ...]
    }

    public function render()
    {
        dump($this->attributes); // still null
        return $this->view('components.test-subject');
    }
}

Attempt to insert it with any number of attributes:

<x-test-subject :test1="'asd'" test2="asdads" test3="asdads" />

[devcircus]

Seems like that's how it is designed. If you pass something in, you must accept it. Same thing with vue. Passed props must be declared or they're not accessible.

[panda-madness]

@devcircus Vue components have access to all attributes not specifically declared as props via this.$attr property. I'm looking for similar behavior here.

[devcircus]

True, but I would still say that, as this was how the components were designed, accessing implicitly received attributes would be a feature request and not a bug report. Probably best to open an issue on the ideas repo and see what the community thinks, or try a PR.

[panda-madness]

I've created a small PR to fix this issue: #32505

[driesvints]

This isn't a bug so closing this. Let's see how the pr goes.

[samlovescoding]

Attributes and slots should be available inside the component class.

[driesvints]

@samlovescoding you can in a more recent Laravel version. If you return a closure from a component you'll get an array with:

1. Component name
2. Attributes
3. Slot

I'll send in a PR to document this.

    public function render()
    {
        return function (array $data) {
            return view('components.foo');
        };
    }

[driesvints]

See: https://github.com/laravel/docs/pull/6221

[earvinpiamonte]

@samlovescoding you can in a more recent Laravel version. If you return a closure from a component you'll get an array with:

1. Component name
2. Attributes
3. Slot

I'll send in a PR to document this.

    public function render()
    {
        return function (array $data) {
            return view('components.foo');
        };
    }

I get an exception in simply returning view('components.foo'). Passing the $data and chaining the render() method to get the view contents worked for me.

public function render()
{
    return function (array $data) {
        return view('components.foo', $data)->render();
    };
}

[driesvints]

@earvinpiamonte docs have been updated for that in the meantime already.