invoiceninja/app/Models/PurchaseOrder.php

<?php
/**
 * Invoice Ninja (https://invoiceninja.com).
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2022. Invoice Ninja LLC (https://invoiceninja.com)
 *
 * @license https://www.elastic.co/licensing/elastic-license
 */

namespace App\Models;


use App\Services\PurchaseOrder\PurchaseOrderService;
use Illuminate\Database\Eloquent\SoftDeletes;

class PurchaseOrder extends BaseModel
{
    use Filterable;
    use SoftDeletes;

    protected $fillable = [
        'number',
        'discount',
        'company_id',
        'status_id',
        'user_id',
        'last_sent_date',
        'is_deleted',
        'po_number',
        'date',
        'due_date',
        'terms',
        'public_notes',
        'private_notes',
        'tax_name1',
        'tax_rate1',
        'tax_name2',
        'tax_rate2',
        'tax_name3',
        'tax_rate3',
        'total_taxes',
        'uses_inclusive_taxes',
        'is_amount_discount',
        'partial',
        'recurring_id',
        'next_send_date',
        'reminder1_sent',
        'reminder2_sent',
        'reminder3_sent',
        'reminder_last_sent',
        'partial_due_date',
        'project_id',
        'custom_value1',
        'custom_value2',
        'custom_value3',
        'custom_value4',
        'backup',
        'footer',
        'line_items',
        'client_id',
        'custom_surcharge1',
        'custom_surcharge2',
        'custom_surcharge3',
        'custom_surcharge4',
//        'custom_surcharge_tax1',
//        'custom_surcharge_tax2',
//        'custom_surcharge_tax3',
//        'custom_surcharge_tax4',
        'design_id',
        'invoice_id',
        'assigned_user_id',
        'exchange_rate',
        'balance',
        'partial',
        'paid_to_date',
        'subscription_id',
        'vendor_id',
        'last_viewed'
    ];

    protected $casts = [
        'line_items' => 'object',
        'backup' => 'object',
        'updated_at' => 'timestamp',
        'created_at' => 'timestamp',
        'deleted_at' => 'timestamp',
        'is_amount_discount' => 'bool',

    ];

    const STATUS_DRAFT = 1;
    const STATUS_SENT = 2;
    const STATUS_PARTIAL = 3;
    const STATUS_APPLIED = 4;

    public function assigned_user()
    {
        return $this->belongsTo(User::class, 'assigned_user_id', 'id')->withTrashed();
    }

    public function vendor()
    {
        return $this->belongsTo(Vendor::class);
    }

    public function history()
    {
        return $this->hasManyThrough(Backup::class, Activity::class);
    }

    public function activities()
    {
        return $this->hasMany(Activity::class)->orderBy('id', 'DESC')->take(50);
    }

    public function company()
    {
        return $this->belongsTo(Company::class);
    }

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

    public function client()
    {
        return $this->belongsTo(Client::class)->withTrashed();
    }


    public function invitations()
    {
        return $this->hasMany(CreditInvitation::class);
    }

    public function project()
    {
        return $this->belongsTo(Project::class)->withTrashed();
    }

    public function invoice()
    {
        return $this->belongsTo(Invoice::class);
    }

    public function service()
    {
        return new  PurchaseOrderService($this);
    }

    public function invoices()
    {
        return $this->belongsToMany(Invoice::class)->using(Paymentable::class);
    }

    public function payments()
    {
        return $this->morphToMany(Payment::class, 'paymentable');
    }

    public function documents()
    {
        return $this->morphMany(Document::class, 'documentable');
    }

}