fetchRequestBlocks for nested objects

[Dan Morrow]

I make a call to a service, and get a result back like this:

{
   main_object: {
      name: "Main 1",
      id: 12345,
      color: "red",
      items: [
         {
            itemName: "abcd",
            itemId: "2",
         },
         {
            itemName: "egde",
            itemId: "3",
         },

         {
            itemName: "rororo",
            itemId: "4",
         }
      ]

   }
}

The service returns "main_object" (which is a managed-object) and it's list of items, which are also managed objects.

I've called "addFetchRequestBlock" for other services that I call... ones that return solely a list of items. But this one returns an object that contains a list of items. I need to persist both the object and it's list.

When I want to fetch the local items, I can just created a fetch request where "parentItem.id == 12345" in this case. And that's all good. My concern is about what happens to the orphaned objects. Not sure how to write a fetchRequestBlock that will handle nested managed objects.

Is this possible with this mechanism, or do I need to do something completely different?

[Dan Morrow]

Just found the answer on github

https://github.com/RestKit/RestKit/issues/1737

Basically, I need to create two fetch-request blocks. One to get "main_object" and the other to get the "items". Both of these blocks will check for the same URL pattern. So, once the orphaned-object deletion happens, it will look at the list of objects from both of these fetchRequestBlocks.