Question

我正在尝试从nodeJS编写的azure函数连接到我的Azure SQL DB。我在应用程序设置中设置了连接字符串，但仍然无效。我使用ODBC密钥进行连接设置。有没有人试过这个？以下是我的功能的示例代码

var Connection = require('tedious').Connection;
var Request = require('tedious').Request;

// Create connection to database
const config = process.env["sqldb_connection"];
var connection = new Connection(config);

// Attempt to connect and execute queries if connection goes through
connection.on('connect', function(err)
   {
     if (err)
       {
          console.log(err)
       }
    else
       {
           queryDatabase()
       }
   }
 );

function queryDatabase()
   { console.log('Reading rows from the Table...');

       // Read all rows from table
     request = new Request(
          "SELECT ORG_ID,ORG_NAME FROM org",
             function(err, rowCount, rows)
                {
                    console.log(rowCount + ' row(s) returned');
                    process.exit();
                }
            );

     request.on('row', function(columns) {
        columns.forEach(function(column) {
            console.log("%s\t%s", column.metadata.colName, column.value);
         });
             });
     connection.execSql(request);
   }

我收到错误说

Exception while executing function: Functions.HttpTriggerJS2. mscorlib: The given key was not present in the dictionary.

Answer 1

在npm install tedious下的 Kudu远程执行控制台中运行D:\home\site\wwwroot命令。
在Azure Functions中，您的所有代码都应放在module.exports函数中。
您应该使用context.log()代替console.log()。
您实际上不必在功能的应用程序设置中设置连接设置字符串。
您应该在调用context.done()后通知运行时代码。

以下代码适用于我：

var Connection = require('tedious').Connection;
var Request = require('tedious').Request;

module.exports = function (context, req) {
    context.log('JavaScript HTTP trigger function processed a request.');

    var config = {
        userName: '<userName>',
        password: '<password>',
        server: '<AzureSQLDBName>.database.windows.net',

        // If you're on Windows Azure, you will need this:
    options:
        {
                database: 'your DB',
                  encrypt: true
        }
};

    var connection = new Connection(config);

    connection.on('connect', function(err) {

        if (err) {
            context.log(err);

            context.res = {
                status: 500,
                body: "Unable to establish a connection."
            };
            context.done();

        } else {
            executeStatement();
        }
    });

    function executeStatement() {

        request = new Request("select 42, 'hello world'", function(err, rowCount) {
            if (err) {
                context.log(err);

                context.res = {
                    status: 500,
                    body: "Failed to connect to execute statement."
                };
                context.done();

            } else {
                context.log(rowCount + ' rows');
            }
        });

        request.on('row', function(columns) {
            columns.forEach(function(column) {
                context.log(column.value);
            });

            context.done();
        });

        connection.execSql(request);
    }
};

有关详细信息，请参阅Azure Functions JavaScript developer guide。

从JS中的Azure Functions连接到Azure SQL DB

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