获取WorkflowSubscription时出现JSOM SharePoint 2013错误

Question

我按照msdn的说明通过JSOM获取WorkflowSubscriptionService.

使用SharePoint 2013 Workflow Services客户端对象模型:http: //msdn.microsoft.com/en-us/library/office/dn481315(v = office.15).aspx

var clientContext = SP.ClientContext.get_current();
var workflowServicesManager = SP.WorkflowServices.WorkflowServicesManager.newObject(clientContext, clientContext.get_web()); 
var workflowSubscriptionService = workflowServicesManager.getWorkflowSubscriptionService();

这三行总是抛出错误:TypeError:Object [object Object]没有方法'get_context'消息:"Object [object Object]没有方法'get_context'"stack:(...)get stack:function(){ [native code]} set stack:function(){[native code]} proto:Error

我找不到错误.这是一个已知的错误？

Answer 1

由于尚未加载指定的对象,因此会发生这些错误.

要使用SharePoint 2013 Workflow Services客户端对象模型,应加载以下JSOM库:

• SP.js
• SP.Runtime.js
• SP.WorkflowServices.js

例如,您可以使用SP.SOD.executeFunc(SharePoint JavaScript库)或jQuery.getScript()(jQuery ibrary)来确保已加载指定的文件.

例:

var scriptbase = _spPageContextInfo.webAbsoluteUrl + "/_layouts/15/";    
$.getScript(scriptbase + "SP.js", function () {    
    $.getScript(scriptbase + "SP.Runtime.js", function () {    
        $.getScript(scriptbase + "SP.WorkflowServices.js", function () {

            var clientContext = SP.ClientContext.get_current();
            var workflowServicesManager = SP.WorkflowServices.WorkflowServicesManager.newObject(clientContext, clientContext.get_web()); 
            var workflowSubscriptionService = workflowServicesManager.getWorkflowSubscriptionService();    

            //... 

        });    
    });   
});