Re: RequestFactory and Collections

Tobias,

RequestFactory doesn't do cascading updates or deletes. You'll have to
make a separate call from the client to do this (or possibly you could
implement in the parent entity's persist() method). By the way,
persist() is just an example method name. As far as RequestFactory is
concerned, it's just another service method that you create.

HTH,
/dmc

On Wed, Nov 3, 2010 at 12:09 PM, Tobias <thabermann@gmail.com> wrote:
> Hi,
>
> I am working on an example application to learn about RequestFactory
> and the new Editor framework. The idea is to edit a Recipe, which has
> multiple ingredients. The ingredients are displayed in CellTable. This
> still involves a couple of problems (e.g.,
> http://groups.google.com/group/google-web-toolkit/browse_thread/thread/1725bc619a4459ab#
> ), but I got it working to the point, where the Request seems to be
> correcty set up and contains the edited RecipeProxy as well as
> multiple IngredientProxy instances.
>
> When I edit a direct property of the Recipe, eg the name (String), on
> the server Recipe.persist() is called and I can save the updated
> object easily (I am using Objectify for this).
>
> However, when I am editing a String property "text" on one of the
> Ingredients, Ingredient.persist is NOT called for the edited
> instance.
>
> I looked at the raw JSON of the request made, and it seems to include
> the updated Ingredient instance. Unfortunately, the DynatableRf and
> the Expenses examples don't deal with n-ary relationships on the
> entities. How is this done? Are there any more naming conventions for
> handling collections?
>
> My proxy interfaces currently look like this:
>
> @ProxyFor(Ingredient.class)
> public interface IngredientProxy extends EntityProxy {
>
>        String getId();
>
>        String getText();
>
>        void setText(String text);
>
>        @Override
>        EntityProxyId<IngredientProxy> stableId();
>
> }
>
> @ProxyFor(Recipe.class)
> public interface RecipeProxy extends EntityProxy {
>
>        long getId();
>
>        String getName();
>
>        void setName(String name);
>
>        @Override
>        EntityProxyId<RecipeProxy> stableId();
>
>        List<IngredientProxy> getIngredients();
>
>        void setIngredients(List<IngredientProxy> ingredients);
> }
>
>
>
> Regards,
> Tobias
>
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--
David Chandler
Developer Programs Engineer, Google Web Toolkit
http://googlewebtoolkit.blogspot.com/

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