Question

用户表结构：用户

id，name，username，password，created_at，updated_at

文章表格结构：文章

id，title，content，created_at，updated_at

关系表：article_user

id，article_id，user_id，is_active，created_at，updated_at

标签

id，name，user_id，created_at，updated_at

数据透视表article_user与标记的关系。 table：article_user_tag

tag_id，article_user_id

class User extends Model
{
    protected $fillable = ['name','username','password'];

    public function articles()
    {
        return $this->belongsToMany('App\Article')->withPivot('is_active')->withTimestamps();
    }

    public function tags()
    {
        return $this->hasMany('App\Tag');
    }
}

class Article extends Model
{
    protected $fillable = ['title','content'];

    public function users()
    {
        return $this->belongsToMany('App\User')->withPivot('is_active')->withTimestamps();;
    }

        public function tags()
    {
        return $this->belongsToMany('App\Tag');
    }       
}

class Tag extends Model
{
    protected $fillable = ['title','content'];

    public function articles()
    {
        return $this->belongsToMany('App\Article');
    }

    public function user()
    {
        return $this->belongsTo('App\User');
    }
}

我想连接这些表，以便我可以像这样或类似的格式访问

$user->articles()->first()->tags;

并且应该能够像这样创建/更新

$user->articles()->first()->create(['title'=>'testing','content'=>'content'])->attach(['tag_id_1','tag_id_2','tag_id_3']);

非常感谢任何帮助

Answer 1

试试这个：

class User extends Model
{
    protected $fillable = ['name','username','password'];

    public function articles()
    {
        return $this->hasMany('App\ArticleUser')->with('article');
    }

    public function tags()
    {
        return $this->hasMany('App\Tag');
    }
}

class ArticleUser extends Model
{
    public funciton article()
    {
        return $this->belongsTo('App\Article');
    }

    public function user()
    {
        return $this->belongsTo('App\User');
    }

    public function tags()
    {
        return $this->belongsToMany('App\Tag');
    }
}

class Article extends Model
{
    protected $fillable = ['title','content'];
}

class Tag extends Model
{
    protected $fillable = ['title','content'];

    public function articles()
    {
        return $this->belongsToMany('App\ArticleUser')->with('article');
    }

    public function user()
    {
        return $this->belongsTo('App\User');
    }
}

与多对多关系的数据透视表创建一对多关系

1 个答案: