【问题标题】:Laravel relationships empty, wrong defined?Laravel 关系为空,定义错误?
【发布时间】:2020-04-12 19:27:07
【问题描述】:

稍作休息后,我想继续我自己的项目。但是,我现在坐在这里已经两个小时了,不知道我做错了什么或我的错误在哪里。

所以,我有可以创建产品、评论和喜欢 cmets 的用户。 但是,当我想检索用户发布的所有产品或 cmets 或用户喜欢的所有 cmets 时,我总是得到没有内容的 hasMany 关系(我在由UserController 调用的仪表板刀片中调用了$user->products()) :

    Illuminate\Database\Eloquent\Relations\HasMany {#662 ▼
      #foreignKey: "products.user_id"
      #localKey: "id"
      #query: Illuminate\Database\Eloquent\Builder {#656 ▶}
      #parent: App\User {#654 ▶}
      #related: App\Product {#663 ▼
        #with: array:1 [▶]
        #connection: "mysql"
        #table: null
        #primaryKey: "id"
        #keyType: "int"
        +incrementing: true
        #withCount: []
        #perPage: 15
        +exists: false
        +wasRecentlyCreated: false
        #attributes: []
        #original: []
        #changes: []
        #casts: []
        #dates: []
        #dateFormat: null
        #appends: []
        #dispatchesEvents: []
        #observables: []
        #relations: []
        #touches: []
        +timestamps: true
        #hidden: []
        #visible: []
        #fillable: []
        #guarded: array:1 [▶]
      }
}

谁能告诉我哪里出错了?

用户模型:

class User extends Authenticatable
{
    use Notifiable;
    use HasRoles;
    use HasSettingsField;

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'name', 'email', 'password',
    ];

    /**
     * The attributes that should be hidden for arrays.
     *
     * @var array
     */
    protected $hidden = [
        'password', 'remember_token',
    ];

    /**
     * The attributes that should be cast to native types.
     *
     * @var array
     */
    protected $casts = [
        'email_verified_at' => 'datetime',
    ];

    /**
     * Get the products record associated with the user.
     */
    public function products()
    {
        return $this->hasMany('App\Product');
    }

    /**
     * Get the comments record associated with the user.
     */
    public function comments()
    {
        return $this->hasMany('App\Comment');
    }

    /**
     * Get the comment likes record associated with the user.
     */
    public function commentlikes()
    {
        return $this->hasMany('App\CommentLike');
    }
}

产品型号:

    class Product extends Model
    {

    /**
     * The relationships that should always be loaded.
     *
     * @var array
     */
    protected $with = ['comments'];

    /**
     * Get the user that owns the product.
     */
    public function user()
    {
        return $this->belongsTo('App\User');
    }
}

评论模型:

/**
 * Display the specified resource.
 *
 * @param  int  $id
 * @return \Illuminate\Http\Response
 */
public function show(User $user)
{
    return view('pages.userDashboard')->with([
        'user' => $user
    ]);
}

【问题讨论】:

    标签: php mysql laravel eloquent


    【解决方案1】:

    我认为像属性一样访问它就可以了。不要像方法一样调用它,如果你这样做了,它就会调用方法。

    $user->products;
    
    $user->comments;
    

    【讨论】:

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