Azure node.js用於更新/檢索天藍色表存儲中的實體

Question

如何更新Azure node.js函數以更新/檢索天藍色表存儲中的實體。我在函數中發現的唯一方法是插入一個條目。 那麼如何查詢/更新表格呢？

任務是簡化基於rowkey和分區鍵檢索數據，然後遞增存儲爲{"num":val}的鍵值對的值。

Answer 1

請通過Azure Functions Storage table bindings的「存儲表輸入綁定」進行閱讀。它有function.json和Node功能的例子。

如果仍有問題仍未解決，請完善問題。

更新：

這裏是一個爲您的精緻問題的示例解決方案。我只有在C＃中，我希望你可以派生節點實現。

csx

#r "Microsoft.WindowsAzure.Storage" 

using System; 
using System.Net; 
using Microsoft.WindowsAzure.Storage.Table; 

public class Entity : TableEntity 
{ 
    public int num {get; set;} 
} 

public static HttpResponseMessage Run(HttpRequestMessage req, string partition, 
    string rowkey, Entity inputEntity, out Entity outputEntity) 
{ 
    if (inputEntity == null) 
     outputEntity = new Entity { PartitionKey = partition, RowKey = rowkey, num = 1}; 
    else 
    { 
     inputEntity.num += 1; 
     outputEntity = inputEntity; 
    } 

    return req.CreateResponse(HttpStatusCode.OK, $"Done, num = {outputEntity.num}"); 
} 

function.json：

{ 
    "bindings": [ 
    { 
     "authLevel": "function", 
     "name": "req", 
     "type": "httpTrigger", 
     "direction": "in", 
     "route": "HttpTriggerTableUpdate/{partition}/{rowkey}" 
    }, 
    { 
     "name": "$return", 
     "type": "http", 
     "direction": "out" 
    }, 
    { 
     "type": "table", 
     "name": "inputEntity", 
     "tableName": "MyTable", 
     "partitionKey": "{partition}", 
     "rowKey": "{rowkey}", 
     "connection": "my_STORAGE", 
     "direction": "in" 
    }, 
    { 
     "type": "table", 
     "name": "outputEntity", 
     "tableName": "MyTable", 
     "partitionKey": "{partition}", 
     "rowKey": "{rowkey}", 
     "connection": "my_STORAGE", 
     "direction": "out" 
    } 
    ], 
    "disabled": false 
}