節點無法讀取未定義的屬性
[英]node cannot read property of undefined
問題描述
我正在為foodtruck制作API以進行練習
geometry: {
type: { default: 'Point' },
coordinates: [ Number ]
}
foodtruck模型中的幾何圖形，我添加了
api.post('/add', (req, res) => {
let newFoodTruck = new FoodTruck()
newFoodTruck.name = req.body.name
newFoodTruck.foodtype = req.body.foodtype
newFoodTruck.avgcost = req.body.avgcost
newFoodTruck.geometry.coordinates = req.body.geometry.coordinates
newFoodTruck.save(err => {
if (err) {
res.send(err)
}
res.json({ message: req.body.name+' FoodTruck saved successfully' })
})
})
帖子中的幾何圖形，以在用戶請求時從用戶那里獲取坐標數據，但是當我嘗試添加（POST） http：// localhost：3005 / v1 / foodtruck / add之類的數據時
{
"name": "Hot dog",
"foodtype": "Meet",
"evgcost": 5.99,
"geometry": {
"coordinates": [35, 34]
}
}
它返回
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Error</title>
</head>
<body>
<pre>TypeError: Cannot read property 'coordinates' of undefined
<br> at C:/Users/Happy/Desktop/FoodTruckAPI/src/controller/foodtruck.js:15:59
<br> at Layer.handle [as handle_request] (C:\Users\Happy\Desktop\FoodTruckAPI\node_modules\express\lib\router\layer.js:95:5)
<br> at next (C:\Users\Happy\Desktop\FoodTruckAPI\node_modules\express\lib\router\route.js:137:13)
<br> at Route.dispatch (C:\Users\Happy\Desktop\FoodTruckAPI\node_modules\express\lib\router\route.js:112:3)
<br> at Layer.handle [as handle_request] (C:\Users\Happy\Desktop\FoodTruckAPI\node_modules\express\lib\router\layer.js:95:5)
<br> at C:\Users\Happy\Desktop\FoodTruckAPI\node_modules\express\lib\router\index.js:281:22
<br> at Function.process_params (C:\Users\Happy\Desktop\FoodTruckAPI\node_modules\express\lib\router\index.js:335:12)
<br> at next (C:\Users\Happy\Desktop\FoodTruckAPI\node_modules\express\lib\router\index.js:275:10)
<br> at Function.handle (C:\Users\Happy\Desktop\FoodTruckAPI\node_modules\express\lib\router\index.js:174:3)
<br> at router (C:\Users\Happy\Desktop\FoodTruckAPI\node_modules\express\lib\router\index.js:47:12)
<br> at Layer.handle [as handle_request] (C:\Users\Happy\Desktop\FoodTruckAPI\node_modules\express\lib\router\layer.js:95:5)
<br> at trim_prefix (C:\Users\Happy\Desktop\FoodTruckAPI\node_modules\express\lib\router\index.js:317:13)
<br> at C:\Users\Happy\Desktop\FoodTruckAPI\node_modules\express\lib\router\index.js:284:7
<br> at Function.process_params (C:\Users\Happy\Desktop\FoodTruckAPI\node_modules\express\lib\router\index.js:335:12)
<br> at Immediate.next (C:\Users\Happy\Desktop\FoodTruckAPI\node_modules\express\lib\router\index.js:275:10)
<br> at Immediate._onImmediate (C:\Users\Happy\Desktop\FoodTruckAPI\node_modules\express\lib\router\index.js:635:15)
</pre>
</body>
</html>
我仍然感到困惑，為什么它返回未定義的坐標
1 個解決方案
解決方案1
0 2018-06-05 13:17:01
是因為類型
geometry: {
type: { type: String, default: 'Point' },
coordinates: [ Number ]
},
我錯過了類型：幾何中的字符串，但是，我不知道為什么需要幾何類型，因為我只需要坐標
jQuery中的JSON節點，未捕獲到TypeError：無法讀取未定義的屬性“ 0”
[英]JSON node in jquery, Uncaught TypeError: Cannot read property '0' of undefined
TypeError：無法讀取未定義的node.js的屬性“ length”
[英]TypeError: Cannot read property 'length' of undefined node.js
Node.js JsonParser 自定義函數“無法讀取未定義的屬性”
[英]Node.js JsonParser custom function "cannot read property of undefined"
聲明:本站的技術帖子網頁，遵循CC BY-SA 4.0協議，如果您需要轉載，請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.
相關問題
Node JS無法讀取未定義的屬性“長度”
節點：TypeError：無法讀取未定義的屬性“ on”
jQuery中的JSON節點，未捕獲到TypeError：無法讀取未定義的屬性“ 0”
節點提取映射錯誤-無法讀取未定義的屬性“地圖”
TypeError：無法讀取未定義的node.js的屬性“ length”
Node.js 無法使用 JSON 數據讀取未定義的屬性
Node.js TypeError無法讀取未定義的屬性objectId
Node.js JsonParser 自定義函數“無法讀取未定義的屬性”
無法讀取未定義node.js的屬性“length”
類型錯誤：無法讀取未定義的 Node.js 的屬性
相關標簽