InvoiceShelf/app/Models/EstimateItem.php

<?php

namespace App\Models;

use App\Traits\HasCustomFieldsTrait;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;

class EstimateItem extends Model
{
    use HasCustomFieldsTrait;
    use HasFactory;

    protected $guarded = [
        'id',
    ];

    protected function casts(): array
    {
        return [
            'price' => 'integer',
            'total' => 'integer',
            'discount' => 'float',
            'quantity' => 'float',
            'discount_val' => 'integer',
            'tax' => 'integer',
        ];
    }

    public function estimate(): BelongsTo
    {
        return $this->belongsTo(Estimate::class);
    }

    public function item(): BelongsTo
    {
        return $this->belongsTo(Item::class);
    }

    public function taxes(): HasMany
    {
        return $this->hasMany(Tax::class);
    }

    public function scopeWhereCompany(Builder $query, int $company_id): void
    {
        $query->where('company_id', $company_id);
    }
}