通过RequestFactory更新多个实体

发布于 2024-12-10 14:03:56 字数 1508 浏览 0 评论 0原文

我有一个包含产品和专家的 GWT 应用程序，一个产品可以有多个专家（一对多关系）。我在使用两个相关实体混合和组合请求时遇到一些麻烦：

ProductProxy 如下所示：

@ProxyFor(myapplication.server.domain.Product.class)
public interface ProductProxy extends EntityProxy {

    Long getId();

    public String getName();
    public void setName(String name);

    [...]

    EntityProxyId<ProductProxy> stableId();

    Set<ExpertProxy> getExperts();
}

我有一个可以编辑产品的对话框，因此它执行以下操作：

ProductProxy selectedProduct; // This comes from a function that delivered all products
productRequest = MyAplication.getRequestFactory().productRequest();
this.product = productRequest.edit(selectedProduct);

编辑产品时，您还可以向该产品添加专家：

@ProxyFor(myapplication.server.domain.Expert.class)

public interface ExpertProxy extends EntityProxy {
    public Long getId();
    public void setId(Long id);

    public ProductProxy getProduct();
    public void setProduct(ProductProxy product);
    [...]
}

我有一个单独的对话框出现。在此对话框中，我尝试使用在作为参数传递之前编辑过的产品创建一个 Expert：

expertRequest = MyApplication.getRequestFactory().expertRequest();
ExpertProxy expert = expertRequest.create(ExpertProxy.class);
expert.setProduct(product); // product comes from the productRequest code

如果我尝试这样做，则在执行 setProduct 时会收到错误，因为来自 ProductRequest 的请求与来自 ExpertRequest 的请求混合。

解决这个问题的最佳方法是什么？我可以通过原始产品请求添加专家吗？我应该从产品中获取 ID 并仅在我的专家请求中使用它吗？或者我应该添加特定的服务器功能来为产品添加专家？或者有更好的选择吗？

原文

I have a GWT applications that contains Products and Experts, and one Product can have multiple Experts (OneToMany relationship). I have some trouble mixing and combining the requests using two entities that are related:

The ProductProxy looks like this:

@ProxyFor(myapplication.server.domain.Product.class)
public interface ProductProxy extends EntityProxy {

    Long getId();

    public String getName();
    public void setName(String name);

    [...]

    EntityProxyId<ProductProxy> stableId();

    Set<ExpertProxy> getExperts();
}

I have a Dialog that can edit the Product, so it does a:

ProductProxy selectedProduct; // This comes from a function that delivered all products
productRequest = MyAplication.getRequestFactory().productRequest();
this.product = productRequest.edit(selectedProduct);

When editing the product, you can also add experts to this product:

@ProxyFor(myapplication.server.domain.Expert.class)

public interface ExpertProxy extends EntityProxy {
    public Long getId();
    public void setId(Long id);

    public ProductProxy getProduct();
    public void setProduct(ProductProxy product);
    [...]
}

I have a separate DialogBox that appears for it. Inside this dialog box, I try to create an expert with the product that is edited before passed on as parameter:

expertRequest = MyApplication.getRequestFactory().expertRequest();
ExpertProxy expert = expertRequest.create(ExpertProxy.class);
expert.setProduct(product); // product comes from the productRequest code

If I try this out, I get an error when doing the setProduct, because the request from productRequest is mixed with a request from expertRequest.

What's the best way to fix this? Can I add an expert via the original productRequest? Should I get the Id from the product and only use this in my Expert Request? Or should I add specific Server functions to add an expert to a product? Or are there better options?

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苏璃陌 2024-12-17 14:03:56

是的，您应该对所有编辑/创建使用相同的 RequestContext 实例。

每个 RequestContext 都会累积要在服务器上重播的操作（新代理和在代理上调用的 setter）和调用（服务方法调用）。当您 fire() 时，这些都会作为批次发送。因此，您的 ExpoertProxy 必须从与您添加到的 ProductProxy 相同的 RequestContext 创建。