小编Car*_*III的帖子

我是AngularJS和DataTables的新手.我正在使用AngularJS前端和Rails后端进行项目.

我正在尝试使用AJAX POST方法在我的项目中使用DataTables,但DataTable AJAX POST方法正在发送数据参数常量.

当我使用正常的AJAX POST请求时它工作正常.我不知道为什么DataTables POST AJAX不起作用.

请帮我解决这个问题.

在AngularJS中使用AJAX调用

$.ajax({
   data: JSON.stringify({
       "key1": "value1",
       "key2": "value2"
   }),
   headers: "application/json; charset=utf-8",
   success: function(data){
        console.log(data);
   },
   error: function(){
       console.log("error");
   },
   type: "POST",
   url: "http://localhost:3000/api"
 });

这段代码是AJAX POST.

它给出了正确的成功响应.

DataTables POST请求

$scope.studentList = {
   bFilter: false,
   paging:   false,
   bRetrieve : true,
   ajax: {
       data: JSON.stringify({
       "key1": "value1",
       "key2": "value2"
   }),
   headers: "application/json; charset=utf-8",
   success: function(data){
        console.log(data);
   },
   error: function(){
       console.log("error");
   },
   type: "POST",
   url: "http://localhost:3000/api"
   processData: false,
 },
 columns: …

我在CRM中构建了一个自定义操作,我需要通过它的WebAPI来解决这个问题.自定义操作已激活,我在创建CRM时没有出现任何错误.

我尝试从VB.NET应用程序调用此操作,如:

Dim httpch As New HttpClientHandler
Dim requestUri As String = "contacts(1fcfd54a-15d3-e611-80dc-0050569ea396)/Microsoft.Dynamics.CRM.new_addnotetocontact"
httpch.Credentials = New NetworkCredential("username", "password", "domain")
Dim httpClient As New HttpClient(httpch)
httpClient.BaseAddress = New Uri(CRMWebApiUri)
httpClient.Timeout = New TimeSpan(0, 2, 0)
httpClient.DefaultRequestHeaders.Add("OData-MaxVersion", "4.0")
httpClient.DefaultRequestHeaders.Add("OData-Version", "4.0")
httpClient.DefaultRequestHeaders.Add("Prefer", "odata.include-annotations='OData.Community.Display.V1.FormattedValue'")
httpClient.DefaultRequestHeaders.Accept.Add(New MediaTypeWithQualityHeaderValue("application/json"))
Dim jsonNote As JObject = New JObject(New JProperty("NoteTitle", "'Mails have been deleted'"), New JProperty("NoteText", "This contacts SmarterMail data has been deleted due to inactivity"))
Dim postData = New StringContent(jsonNote.ToString(), Encoding.UTF8, "application/json")

Dim retrieveContactResponse As HttpResponseMessage = httpClient.PostAsync(requestUri, postData).Result …

我在这样的控制器中创建了一个CSV下载器

format.csv do
  @records  = Model.all

  headers['Content-Disposition'] = "attachment; filename=\"products.csv\"" 
  headers['Content-Type'] ||= 'text/csv'
end

现在我想创建server sent events以从中下载CSV以进行优化.我知道我可以在Rails中使用它,ActionController::Live但我没有经验.

有人可以向我解释我是怎么做的

1. 将记录作为批次查询
2. 添加记录到 stream
3. sse从浏览器端处理
4. 将记录写入CSV文件

如果我的任何假设是错误的,请纠正我.帮助我以更好的方式做到这一点.谢谢.

我试图找到解决方案,但仍然没有运气.

我正在关注"Pro Spring 3"(Appress)[第351页]

我已经将项目生成为jpa项目.

据我所知,我可以使用persistence.xml或者可以在bean内部管理它,这就是我想要的.

对于最新的我们需要定义packagesToScan属性.

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jpaPersonService': Injection of persistence dependencies failed; nested exception is 
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'emf' defined in class path resource [META-INF/app-context.xml]: Error setting property values; nested exception 
is **org.springframework.beans.NotWritablePropertyException: Invalid property 'packagesToScan' of bean class [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean]: Bean property 'packagesToScan' is not writable or has an invalid setter method. Does the parameter type of the setter match …