new CartItem (['amount' => $amount])

iqweqwkeqwewqeqweqweqwe 的个人博客 / 55 / 1 / 创建于 3年前

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class CartItem extends Model
{
    protected $fillable = ['amount'];
    public $timestamps = false;

    public function user()
    {
        return $this->belongsTo(User::class);
    }

    public function productSku()
    {
        return $this->belongsTo(ProductSku::class);
    }
}

use App\Models\CartItem;
$cart = new CartItem([‘amount’ => $amount]);//为什么可以这样用，直接new 一下，amount的值就传进去了？

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  // Illuminate\Database\Eloquent\Model

    /**
     * Create a new Eloquent model instance.
     *
     * @param  array  $attributes
     * @return void
     */
    public function __construct(array $attributes = [])
    {
        $this->bootIfNotBooted();

        $this->initializeTraits();

        $this->syncOriginal(); // 

        $this->fill($attributes);
    }

    /**
     * Sync the original attributes with the current.
     *
     * @return $this
     */
    public function syncOriginal()
    {
        $this->original = $this->attributes;

        return $this;
    }

    /**
     * Fill the model with an array of attributes.
     *
     * @param  array  $attributes
     * @return $this
     *
     * @throws \Illuminate\Database\Eloquent\MassAssignmentException
     */
    public function fill(array $attributes)
    {
        $totallyGuarded = $this->totallyGuarded();

        foreach ($this->fillableFromArray($attributes) as $key => $value) {
            $key = $this->removeTableFromKey($key);

            // The developers may choose to place some attributes in the "fillable" array
            // which means only those attributes may be set through mass assignment to
            // the model, and all others will just get ignored for security reasons.
            if ($this->isFillable($key)) {
                $this->setAttribute($key, $value);
            } elseif ($totallyGuarded) {
                throw new MassAssignmentException(sprintf(
                    'Add [%s] to fillable property to allow mass assignment on [%s].',
                    $key, get_class($this)
                ));
            }
        }

        return $this;
    }