slake-school-service/app/Models/Demand.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\SoftDeletes;

class Demand extends Model
{
    use SoftDeletes;

    protected $fillable = [
        'teacher_id',
        'type_dict_item_id',
        'status_dict_item_id',
        'title',
        'content',
        'contact_name',
        'company',
        'submitted_at',
        'miniapp_user_id',
    ];

    protected $casts = [
        'teacher_id' => 'integer',
        'type_dict_item_id' => 'integer',
        'status_dict_item_id' => 'integer',
        'submitted_at' => 'datetime',
        'miniapp_user_id' => 'integer',
    ];

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

    public function typeItem(): BelongsTo
    {
        return $this->belongsTo(DictItem::class, 'type_dict_item_id');
    }

    public function statusItem(): BelongsTo
    {
        return $this->belongsTo(DictItem::class, 'status_dict_item_id');
    }

    public function handleLogs(): HasMany
    {
        return $this->hasMany(DemandHandleLog::class)->orderByDesc('handled_at')->orderByDesc('id');
    }
}