How to get relationships data from JSONAPI document top-level "included"

[Arcovv]

Environment

Xcode Version 8.2.1 (8C1002) Swift 3.0

Code

There's my json data format:

{
  "data": {
    "type": "library_items",
    "id": "1",
    "attributes": {
      "action": "download",
      "new": false,
    },
    "relationships": {
      "book": {
        "data": {
          "type": "books",
          "id": "1"
        }
      },
      "reading": {
        "data": {
          "type": "readings",
          "id": "10"
        }
      }
    }
  },
  "included": [
    {
      "type": "publishers",
      "id": "2",
      "attributes": {
        "name": "..."
      },
      "links": {
        "self": "api url"
      }
    },
    {
      "type": "books",
      "id": "1",
      "attributes": {
        "title": "...",
        "author": "..."
      },
      "relationships": {
        "publisher": {
          "data": {
            "type": "publishers",
            "id": "2"
          }
        }
      },
      "links": {
        "self": "api url"
      }
    },
    {
      "type": "readings",
      "id": "10",
      "attributes": {
        "state": "reading",
        "privacy": "everyone",
      },
      "links": {
        "self": "api url"
      }
    }
  ]
}

There's my Resource classes:

final class LibraryItemResource: Resource {

  // MARK: - Attributes

  public var action = ""
  public var new = false
  public var books: BookResource!
  public var readings: ReadingResource!

  // MARK: - Override properties

  public override class var resourceType: ResourceType {
    return "library_items"
  }

  public override class var fields: [Field] {
    return fieldsFromDictionary([
      "action": Attribute(),
      "new": BooleanAttribute(),
      "books": ToOneRelationship(BookResource.self),
      "readings": ToOneRelationship(ReadingResource.self)
    ])
  }

}

final public class BookResource: Resource {

  // MARK: - Attributes

  public var title = ""
  public var author = ""

  // MARK: - Override properties

  public override class var resourceType: ResourceType {
    return "books"
  }

  public override class var fields: [Field] {
    return fieldsFromDictionary([
      "title": Attribute(),
      "author": Attribute()
    ])
  }

}

final public class ReadingResource: Resource {

  // MARK: - Attributes

  public var state = ""
  public var privacy = ""

  // MARK: - Override properties

  public override class var resourceType: ResourceType {
    return "readings"
  }

  public override class var fields: [Field] {
    return fieldsFromDictionary([
      "state": Attribute(),
      "privacy": Attribute()
      ])
  }

}

For test, I implemented my code like this:

var query = Query(resourceType: LibraryItemResource.self, path: "/.../my path")
query.include("books", "readings")

spine.find(query)
  .onSuccess() { resources, meta, jsonapi in
    printf("resources count: \(resources.count)")

    for resource in resources.resources {
      let libraryItemResource = resource as! LibraryItemResource
      printf("books: \(libraryItemResource.books)")
      printf("readings: \(libraryItemResource.readings)")
    }

    printf("meta: \(meta)")
    printf("jsonapi: \(jsonapi)")
  }.onFailure() { error in
    printf(error)
}

The spine had call my onSuccess callback and gave me some resources.

But in the for-in loop, libraryItemResource.books and libraryItemResource.readingsare always nil.

I have verified that query.include("books", "readings") is not what I expected to use.

But I still don't know how to get the data from included json and assign them to the libraryItemResource.

Thanks for your help!

[wvteijlingen]

The attributes you defined in the LibraryItemResource are called books and readings, but they are called book and reading in your JSON. They should match. Because this is a to-one relationship, the singular form is probably correct.