Azure Cosmos DB存储过程不返回文档

我正在尝试使用node.js在Azure Cosmos DB中创建存储过程 . 创建存储过程是成功的，但在尝试执行它时（从javascript / nodejs），它不返回任何文档 .

首先，我定义存储过程，然后在Cosmos DB中注册它：

var DocumentDBClient = require('documentdb').DocumentClient;

var host = "our-hostname";  // Add your endpoint
var masterKey = "our-master-key"; // Add the masterkey of the endpoint

var client = new DocumentDBClient(host, {masterKey: masterKey});

var powerPlantDataReadingStoredProc = {
    id: "GetPowerPlantDataReadingsSproc",
    serverScript: function() {           
        var context = getContext();           
        var collection = context.getCollection();   
        var request = context.getRequest();
        var response = context.getResponse();

        var isAccepted = collection.queryDocuments(collection.getSelfLink(),
                    'SELECT TOP 1 * FROM c',
                    function(err, feed, options) {
                        response.setBody(JSON.stringify(feed));
                    });

        if(!isAccepted) throw new Error("The query was not acceted by the server");
     }
};

// Register stored proc
var createdStoredProc;

client.createStoredProcedure('dbs/PowerPlantDataReadings/colls/DataReadings', powerPlantDataReadingStoredProc, function(err, sproc) {
    createdStoredProc = sproc;
});

我用来执行它的代码：

client.executeStoredProcedure("dbs/PowerPlantDataReadings/colls/DataReadings/sprocs/GetPowerPlantDataReadingsSproc", null, { partitionKey: "datareadings" }, function(err, results, responseHeaders) {
    if(err) {
        console.log("Error: ");
        console.log(JSON.stringify(err));
    }

    if(responseHeaders) {
        console.log("Headers: ");
        console.log(JSON.stringify(responseHeaders));
    }

    console.log("Results: " + results);

    if(results) {
        console.log("Results: ");
        console.log(JSON.stringify(results));
    }
});

我在控制台中没有出错 . 只是一个空数组 . 此外，该集合中有 are 个文件;-)

有谁知道我在这里缺少什么？

提前致谢 .

编辑：

从sproc获取这些响应头：

Headers: {"cache-control":"no-store, no-cache","pragma":"no-cache","transfer-encoding":"chunked","content-type":"application/json","server":"Microsoft-HTTPAPI/2.0","strict-transport-security":"max-age=31536000","x-ms-last-state-change-utc":"Tue, 05 Sep 2017 08:01:38.741 GMT","x-ms-schemaversion":"1.3","x-ms-alt-content-path":"dbs/PowerPlantDataReadings/colls/DataReadings/sprocs/GetPowerPlantDataReadingsSproc","x-ms-content-path":"cjFwAKg0WQA=","x-ms-quorum-acked-lsn":"25347","x-ms-current-write-quorum":"3","x-ms-current-replica-set-size":"4","x-ms-xp-role":"1","x-ms-request-charge":"6.12","x-ms-serviceversion":"version=1.14.89.5","x-ms-activity-id":"604b8d09-ad08-427a-8dee-1b7862e0e092","x-ms-session-token":"0:25347","x-ms-gatewayversion":"version=1.14.89.5","date":"Tue, 05 Sep 2017 09:38:32 GMT","x-ms-throttle-retry-count":0,"x-ms-throttle-retry-wait-time-ms":0} Results: []

此外，在Azure Portal上的查询编辑器中进行查询时，我确实得到了预期的结果：

我的分区键如下：