spa-api/app/Models/ProjectLabelRelationModal.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\HasOne;

/**
 * 项目标签关联表
 */
class ProjectLabelRelationModal extends Model
{
    //
    protected $table = 'project_label_relations';

    protected $guarded  = [];

    /**
     * 项目
     * @return HasOne
     */
    public function project(): HasOne
    {
        return $this->hasOne(ProjectModal::class, 'id', 'project_id');
    }

    /**
     * 标签
     * @return HasOne
     */
    public function label(): HasOne
    {
        return $this->hasOne(LabelModal::class, 'id', 'label_id');
    }
}