CODEWITHSUNDEEP
iosobjective-crestkit
MrTJ
MrTJ

Reputation: 13192

RestKit object mapping with foreign keys and services

I am trying to set up a RestKit object mapping for a rest-like service over what I unfortunately have no control.

The model is a wish list with with a list of products. The WishList and the Product has obviously many-to-many relation. The wish list and the product has various attributes, for simplicity let's suppose that they both have only name.

I have separate services to get the details a wish list, the details of the product, and the relationship between them.

For example:

GET /api/wish_list/?id=1234

{ 
    "name"="My wish list",
    "id"=1234
}

GET /api/products

{
    products:[
    {
        "name"="Product 1",
        "id"=1111
    },
    {
        "name"="Product 2",
        "id"=2222
    },
    {
        "name"="Product 3",
        "id"=3333
    }]
}

GET /api/wish_list_products/?wish_list_id=1234

{
    products:[
    {
        "id"=1111
    },
    {
        "id"=2222
    }
}

I created the core data relationship between the Product and WishList entities but how could I tell to RestKit the fact that it should make a second request to fetch the list of the IDs of the products for a particular WishList?

I guess I should use [RKRoute routeWithRelationshipName:objectClass:pathPattern:method:] and/or RKConnectionDescription object, but I really could not figure out from the help how they could help me in my case.

Upvotes: 2

Views: 212

Answers (1)

Wain
Wain

Reputation: 119031

RestKit won't automatically load the data for the relationship, you need to tell it when to do so. If you add the route using routeWithRelationshipName:objectClass:pathPattern:method: then you can make the request using getObjectsAtPathForRelationship:ofObject:parameters:success:failure:. Basically it makes linking the relationship name to the request to gather the required details.

Upvotes: 4

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