Javascript 从mongodb获取角度返回[object]

我试图从mongodb服务器获取数据，但我一直在获取某些值的[object]。我环顾四周，看到其他人也遇到同样的问题，但这些解决方案都不起作用。任何和所有的帮助都将不胜感激

服务器上有什么

[
{
"_id": "5590c890a0bc61972f636f95",
"name": "Quiz",
"info": "Info",
"questions": [
  {
    "question": "How about 0?",
    "type": "radio",
    "answers": [
      {
        "answer": 0
      },
      {
        "answer": 1
      },
      {
        "answer": 2
      },
      {
        "answer": 3
      }
    ]
  },
  {
    "question": "How about 1?",
    "type": "check",
    "answers": [
      {
        "answer": 0
      },
      {
        "answer": 1
      },
      {
        "answer": 2
      },
      {
        "answer": 3
      }
    ]
  },
  {
    "question": "How about 2?",
    "type": "radio",
    "answers": [
      {
        "answer": 0
      },
      {
        "answer": 1
      },
      {
        "answer": 2
      },
      {
        "answer": 3
      }
    ]
  },
  {
    "question": "How about 3?",
    "type": "check",
    "answers": [
      {
        "answer": 0
      },
      {
        "answer": 1
      },
      {
        "answer": 2
      },
      {
        "answer": 3
      }
    ]
  },
  {
    "question": "How about 4?",
    "type": "text",
    "answers": [
      {
        "answer": 0
      },
      {
        "answer": 1
      },
      {
        "answer": 2
      },
      {
        "answer": 3
      }
    ]
  },
  {
    "question": "How about 5?",
    "type": "text",
    "answers": [
      {
        "answer": 0
      },
      {
        "answer": 1
      },
      {
        "answer": 2
      },
      {
        "answer": 3
      }
    ]
  },
  {
    "question": "How about 6?",
    "type": "check",
    "answers": [
      {
        "answer": 0
      },
      {
        "answer": 1
      },
      {
        "answer": 2
      },
      {
        "answer": 3
      }
    ]
  },
  {
    "question": "How about 7?",
    "type": "check",
    "answers": [
      {
        "answer": 0
      },
      {
        "answer": 1
      },
      {
        "answer": 2
      },
      {
        "answer": 3
      }
    ]
  },
  {
    "question": "How about 8?",
    "type": "text",
    "answers": [
      {
        "answer": 0
      },
      {
        "answer": 1
      },
      {
        "answer": 2
      },
      {
        "answer": 3
      }
    ]
  },
  {
    "question": "How about 9?",
    "type": "check",
    "answers": [
      {
        "answer": 0
      },
      {
        "answer": 1
      },
      {
        "answer": 2
      },
      {
        "answer": 3
      }
    ]
  },
  {
    "question": "How about 10?",
    "type": "check",
    "answers": [
      {
        "answer": 0
      },
      {
        "answer": 1
      },
      {
        "answer": 2
      },
      {
        "answer": 3
      }
    ]
  },
  {
    "question": "How about 11?",
    "type": "radio",
    "answers": [
      {
        "answer": 0
      },
      {
        "answer": 1
      },
      {
        "answer": 2
      },
      {
        "answer": 3
      }
    ]
  },
  {
    "question": "How about 12?",
    "type": "text",
    "answers": [
      {
        "answer": 0
      },
      {
        "answer": 1
      },
      {
        "answer": 2
      },
      {
        "answer": 3
      }
    ]
  },
  {
    "question": "How about 13?",
    "type": "check",
    "answers": [
      {
        "answer": 0
      },
      {
        "answer": 1
      },
      {
        "answer": 2
      },
      {
        "answer": 3
      }
    ]
  },
  {
    "question": "How about 14?",
    "type": "radio",
    "answers": [
      {
        "answer": 0
      },
      {
        "answer": 1
      },
      {
        "answer": 2
      },
      {
        "answer": 3
      }
    ]
  },
  {
    "question": "How about 15?",
    "type": "check",
    "answers": [
      {
        "answer": 0
      },
      {
        "answer": 1
      },
      {
        "answer": 2
      },
      {
        "answer": 3
      }
    ]
  },
  {
    "question": "How about 16?",
    "type": "radio",
    "answers": [
      {
        "answer": 0
      },
      {
        "answer": 1
      },
      {
        "answer": 2
      },
      {
        "answer": 3
      }
    ]
  },
  {
    "question": "How about 17?",
    "type": "check",
    "answers": [
      {
        "answer": 0
      },
      {
        "answer": 1
      },
      {
        "answer": 2
      },
      {
        "answer": 3
      }
    ]
  },
  {
    "question": "How about 18?",
    "type": "text",
    "answers": [
      {
        "answer": 0
      },
      {
        "answer": 1
      },
      {
        "answer": 2
      },
      {
        "answer": 3
      }
    ]
  },
  {
    "question": "How about 19?",
    "type": "check",
    "answers": [
      {
        "answer": 0
      },
      {
        "answer": 1
      },
      {
        "answer": 2
      },
      {
        "answer": 3
      }
    ]
  }
]
}
]

输出页面的控制器

angular.module('quizApp')
  .controller('DispTestCtrl', function ($scope, $http) {
    $scope.questions = [];

    $http.get('/api/tests').success(function(data) {
      $scope.questions = data;
  });

  console.log($scope.questions);
});

我得到了什么

[{"_id":"558f523a609aba42bf06b807",
"name":"Quiz",
"info":"Info",
"questions":["[object Object]","[object Object]","[object Object]","[object Object]","[object Object]","[object Object]","[object Object]","[object Object]","[object Object]","[object Object]","[object Object]","[object Object]","[object Object]","[object Object]","[object Object]","[object Object]","[object Object]","[object Object]","[object Object]","[object Object]"]}]

---

确保您使用了JSON.stringify（数据）；在发送之前和之后使用JSON.parse（数据）；将其转换为JS对象。

有许多解决方案。因为您知道对象是字符串，所以可以执行此操作

String（$scope.questions[desiredQuestionIndex]）

。如果要转换数组中的所有对象，

JSON.stringify（$scope.questions）。

查看此问题了解更多信息
是否可以检查“网络”选项卡以验证从服务器发送数据时数据是否已经不正确，或者是客户端的问题？可能是JSON.parse（）：Console.log（）如果响应对象较长，则不打印所有对象。所以请在json响应中签入charles、postman扩展或返回数组。如果您使用的是php，则使用print_r（）或var_dump（）；我在chrome的开发工具中的网络选项卡中进行了检查，当数据到达客户端时是不正确的。然后在输出中返回“[]”。执行此操作后，将json对象推送到MongoDB数据库时出现了“无法在字符串上创建属性”\u id“错误。我建议不要遵循这个答案。