迭代req.body.objectName以測試鍵值對是否在節點js中有效

問題陳述如下：「節點js webservice服務器應用程序應首先驗證req.body .object包含有效的鍵值對，如果它存在，那麼只會去mongodb特定的方法並執行一些CRUD操作併發送響應，否則發送響應的鍵值對不正確或類似。迭代req.body.objectName以測試鍵值對是否在節點js中有效

那麼，實現這一目標，我試圖把東西像下面的一個在路線：

if ((updatevalues.ConfigID == null) || (updatevalues.ConfigName == null) || (updatevalues.Description == null) || (updatevalues.Version == null) || (updatevalues.ClassName == null) || (updatevalues.ConfigGroups_Info.AllEvents == null) || (updatevalues.ConfigGroups_Info.BillingDateCleard == null) || (updatevalues.ConfigGroups_Info.BillingScheduleExpiration == null) || (updatevalues.ConfigGroups_Info.ConfigurationErrorDetected == null) || (updatevalues.ConfigGroups_Info.DailySelfReadTime == null) || (updatevalues.ConfigGroups_Info.DataVineHyperSproutChange == null) || (updatevalues.ConfigGroups_Info.DataVineSyncFatherChange == null) || (updatevalues.ConfigGroups_Info.Demand == null) || (updatevalues.ConfigGroups_Info.DemandResetOccured == null) || (updatevalues.ConfigGroups_Info.DeregistrationResult == null) || (updatevalues.ConfigGroups_Info.EnableVoltageMonitor == null) || (updatevalues.ConfigGroups_Info.Energy1 == null) || (updatevalues.ConfigGroups_Info.HighVoltageThresholdDeviation == null) || (updatevalues.ConfigGroups_Info.HistoryLogCleared == null) || (updatevalues.ConfigGroups_Info.InterrogationSendSucceeded == null) || (updatevalues.ConfigGroups_Info.IntervalLength == null) || (updatevalues.ConfigGroups_Info.LinkFailure == null) || (updatevalues.ConfigGroups_Info.LinkMetric == null) || (updatevalues.ConfigGroups_Info.LoadProfileError == null) || (updatevalues.ConfigGroups_Info.LowBatteryDetected == null) || (updatevalues.ConfigGroups_Info.LowVoltageThreshold == null) || (updatevalues.ConfigGroups_Info.LowVoltageThresholdDeviation == null) || (updatevalues.ConfigGroups_Info.OutageLength == null) || (updatevalues.ConfigGroups_Info.PrimaryPowerDown == null) || (updatevalues.ConfigGroups_Info.PulseWeight1 == null) || (updatevalues.ConfigGroups_Info.PulseWeight2 == null) || (updatevalues.ConfigGroups_Info.PulseWeight3 == null) || (updatevalues.ConfigGroups_Info.PulseWeight4 == null) || (updatevalues.ConfigGroups_Info.Quantity4 == null) || (updatevalues.ConfigGroups_Info.RMSVoltHighThreshold == null) || (updatevalues.ConfigGroups_Info.RMSVoltLoadThreshold == null) || (updatevalues.ConfigGroups_Info.ReceivedMessageFrom == null) || (updatevalues.ConfigGroups_Info.SendResponseFailed == null) || (updatevalues.ConfigGroups_Info.TableSendRequestFailed == null) || (updatevalues.ConfigGroups_Info.TestModeDemandIntervalLength == null) || (updatevalues.ConfigGroups_Info.TimetoremaininTestMode == null) || (updatevalues.ConfigGroups_Info.ZigbeeSETunnelingMessage == null) || (updatevalues.ConfigGroups_Info.ZigbeeSimpleMeteringMessage == null)) { 

    res.json({ 
     "type": false, 
     "Status": "Invalid Parameter" 
    }); 
} 
else { 

    dbCmd.updateConfigDataValues(updatevalues, function (err, data) { 
     if (err) { 
      res.json({ 
       "type": false, 
       "Message": err.message, 
      }); 
     } else { 
      res.json({ 
       "type": true, 
       "Message": data.toString(), 
      }); 
     } 
    }); 
}

}）;

module.exports = router;

我覺得這不是實現上述目標的正確或優化方式。 我想壓縮/壓縮If條件，以便代碼看起來更好。和藹可親。

來源

2016-08-24 Gaurav Shukla

你可以把字段陣列那樣：

let fields = [ 
 
'ConfigID', 
 
'ConfigName', 
 
'ConfigGroups_Info.AllEvents' 
 
...]; 
 

 
if (_.some(fields, f => _.get(updatevalues, f) === null)) { 
 
res.json({ 
 
     "type": false, 
 
     "Status": "Invalid Parameter" 
 
    }); 
 
} 
 
else ...

順便說一句，你可能想確保領域都存在，因此檢查他們是否爲空是不正確的。如果該字段丟失，則爲undefined而不是null。你可以檢查一下!_.get(updatevalues, f)。對於null，undefined，0，空字符串和false將爲true。如果它太多，你需要特別檢查你需要什麼，比如null和undefined。

來源

2016-08-24 06:15:40

嗨，感謝您的回覆。對不起，來晚了。你能否給出更容易理解的更簡單的解決方案？ –

這是我能想到的最簡單的。你不明白什麼？關於這個下劃線表示法，請參考 –

「if（_.some（fields，f => _.get（updatevalues，f）=== null））」，請提供一些URL來閱讀更多關於它的信息？它來自underscore.js npm包嗎？我實際上沒有機會在underscore.js上工作。 –

迭代req.body.objectName以測試鍵值對是否在節點js中有效

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