Question

有没有办法使用RequestFactory在单个请求中创建两个实体？我试过了：

    EmployeeRequest request = requestFactory.employeeRequest();
    EmployeeProxy newEmployee = request.create(EmployeeProxy.class);
    newEmployee.setName("Joe!");

    Request<Void> createReq = request.persist().using(newEmployee);
    createReq.fire();

    EmployeeProxy newEmployee2 = request.create(EmployeeProxy.class);
    newEmployee2.setName("Sam!");

    Request<Void> createReq2 = request.persist().using(newEmployee2);
    createReq2.fire();

但是我收到一条错误信息，表明请求已在进行中。当我创建两个单独的EmployeeRequests时：

    EmployeeRequest request = requestFactory.employeeRequest();
    EmployeeProxy newEmployee = request.create(EmployeeProxy.class);
    newEmployee.setName("Joe!");

    Request<Void> createReq = request.persist().using(newEmployee);
    createReq.fire();

    EmployeeRequest request2 = requestFactory.employeeRequest();
    EmployeeProxy newEmployee2 = request2.create(EmployeeProxy.class);
    newEmployee2.setName("Sam!");

    Request<Void> createReq2 = request2.persist().using(newEmployee2);
    createReq2.fire();

然后从浏览器发出两个单独的请求。我希望RequestFactory中的某些内容可以合并多个请求 - 我必须一次创建数百个实体，而且我不想发出数百个请求！

Answer 1

是的，这是可能的。在第一个示例中，只需删除行

即可

createReq.fire();

当你在最后调用createReq2.fire()时，GWT会在一个请求中发送newEmployee和newEmployee2（因为它们都持久存储在EmployeeRequest“request”的上下文中）。我个人觉得语义有点奇怪，但这只是我的观点。

莱利的补遗：以下语法是等效的，更直观：

    EmployeeRequest request = requestFactory.employeeRequest();
    EmployeeProxy newEmployee = request.create(EmployeeProxy.class);
    newEmployee.setName("Joe!");

    request.persist().using(newEmployee);

    EmployeeProxy newEmployee2 = request.create(EmployeeProxy.class);
    newEmployee2.setName("Sam!");

    request.persist().using(newEmployee2);
    request.fire();

GWT RequestFactory和多个请求

1 个答案: