Response内容必须是实现__toString()的字符串或对象,移动到psql后给出"boolean"

Question

只要我将Laravel应用程序从MySQL移动到pSQL.我一直收到这个错误.

Response内容必须是实现__toString()的字符串或对象,给出"boolean".

我有一个API,假设要退回我的促销活动

HTTP://本地主机:8888/API /推广/ 1

public function id($id){
    $promotion = Promotion::find($id);
    dd($promotion); //I got something here
    return $promotion;
}

它曾用于返回我的促销,现在它返回错误.

---

DD($推广);

I got 

Promotion {#410 ?
  #table: "promotions"
  #connection: null
  #primaryKey: "id"
  #perPage: 15
  +incrementing: true
  +timestamps: true
  #attributes: array:16 [?
    "id" => 1
    "cpe_mac" => "000D6721A5EE"
    "name" => "qwrqwer"
    "type" => "img_path"
    "status" => "Active"
    "heading_text" => "qwerq"
    "body_text" => "werqwerqw"
    "img" => stream resource @244 ?}
    "img_path" => "/images/promotion/1/promotion.png"
    "video_url" => ""
    "video_path" => ""
    "account_id" => 1001
    "img_url" => ""
    "footer_text" => "qwerqwerre"
    "created_at" => "2016-08-04 10:53:57"
    "updated_at" => "2016-08-04 10:53:59"
  ]
  #original: array:16 [?]
  #relations: []
  #hidden: []
  #visible: []
  #appends: []
  #fillable: []
  #guarded: array:1 [?]
  #dates: []
  #dateFormat: null
  #casts: []
  #touches: []
  #observables: []
  #with: []
  #morphClass: null
  +exists: true
  +wasRecentlyCreated: false
}

---

内容

__任何关于此的提示/建议都将是一个巨大的帮助!

Answer 1

您的回复必须返回某种Response对象.你不能只返回一个对象.

所以将它改为:

return Response::json($promotion);

或者我最喜欢使用辅助函数:

return response()->json($promotion);

如果返回响应不起作用,则可能是某种编码问题.请参阅此文章:Response内容必须是实现__toString()的字符串或对象,给出"boolean"."

Answer 2

当你刚从response()->json($promotion)控制器动作开始时,Laravel将调用$promotion它将其转换为要显示的字符串.

在img,__toString()调用return $promotion,返回结果__toString().因此,Model正在返回__toString(),这意味着它正在遇到错误.

您的toJson()节目表明您的json_encode属性是json_encode.false不能编码dd,所以这可能导致失败.您应该将img属性添加到stream resource属性以将其从中删除json_encode.

class Promotion extends Model
{
    protected $hidden = ['img'];

    // rest of class
}