以编程方式呈现 Laravel 7 组件

Question

我有一个 Laravel 7 组件，看起来像这样

class Input extends Component
{
    public $name;
    public $title;
    public $value;
    public $type = 'text';

    /**
     * Create a new component instance.
     *
     * @return void
     */
    public function __construct($name, $title)
    {
        $this->name = $name;
        $this->title = $title;
        $this->value = \Form::getValueAttribute($name);
    }

    /**
     * Get the view / contents that represent the component.
     *
     * @return \Illuminate\View\View|string
     */
    public function render()
    {
        return view('components.fields.input');
    }
}

我可以像这样在我的 Blade 组件中渲染字段：

<x-input name="name" :title="__('My field')" />

我需要在代码中创建和呈现字段，我尝试了以下方法：

$field = new Input('name', 'My field');
$field->render();

这returns一个错误：

Undefined variable: title

我可以看到调用了渲染函数，但 public 属性对视图不可用。我将如何渲染具有 public 属性的组件？

Answer 1

手动将变量添加到视图。不然不行

我已报告此问题，但这不是问题：

https://github.com/laravel/framework/issues/32429

Answer 2

只需添加要手动查看的属性即可。如果不将属性设为私有，但不应对此产生影响。只是我的实现。

     /**
     * Get the view / contents that represent the component.
     *
     * @return \Illuminate\View\View|string
     */
    public function render()
    {
        return view(
            'components.fields.input',
            ['name' => $this->name, 'title' => $this->title]
        );
    }

Answer 3

试试这个，它在 laravel 8 中对我有用，我检查了 data 函数存在于 laravel 7

中

$field = new Input('name', 'My field');
$field->render()->with($field->data());

** 数据函数包括组件的方法、属性和属性。

Answer 4

我用这个，它也适用于匿名组件。把它放在你的帮助文件中。

/**
 * Render a blade component.
 * @param string $name Component name, exclude component folder (i.e use "card" instead of "components.card")
 * @param array $props Component properties
 * @param array $attributes Component attributes
 * @return \Illuminate\Contracts\View\View
 */
function viewComponent($name, $props = [], $attributes = []) {
    $className = collect(explode('.', $name))->map(function($part) {
        return \Str::studly($part);
    })->join('\');
    $className = "App\View\Components\{$className}";
    if(class_exists($className)) {
        $reflection = (new \ReflectionClass($className))->getConstructor();
        $parameters = [];
        foreach ($reflection->getParameters() as $param) {
            $parameters[] = $props[$param->name] ?? $param->getDefaultValue();
        }
        $component = new $className(...$parameters);
        $component->withAttributes($attributes);
        return $component->render()->with($component->data());
    }

    $props['attributes'] = new \Illuminate\View\ComponentAttributeBag($attributes);
    return view("components.$name", $props);
}

用法

viewComponent('input', [
    'name' => 'name',
    'title' => 'My Field',
]);

// if you want custom attribute
viewComponent('input', [
    'name' => 'name',
    'title' => 'My Field',
], [
    'autocomplete' => 'off',
    'data-custom' => 'custom attribute',
]);

Answer 5

last release (v.8.80) of Laravel should help you achieve what you're trying to do with the pull #40425

Blade::render('<x-input name="name" :title="$title" />', ['title' => __('My field')]);

以编程方式呈现 Laravel 7 组件

Render Laravel 7 component programmatically

laravel

laravel-blade

laravel-7

用法