How to create compound documents? - json-api

Question

I'm thinking of using the JSONAPI standard for the design of our API. One thing this API must be able to do, is accept a compound document (several layers deep) and create it. The root object owns all descendants ('to-many' relationships) which the server knows nothing about at that point, so it's not possible for the client to provide an id.
Is this supported by the specification or does the client have to issue http requests for every object in the document in order?

Answer 1

from http://jsonapi.org/format/#document-compound-documents
Compound documents require "full linkage", meaning that every included
resource MUST be identified by at least one resource identifier object
in the same document. These resource identifier objects could either
be primary data or represent resource linkage contained within primary
or included resources. The only exception to the full linkage
requirement is when relationship fields that would otherwise contain
linkage data are excluded via sparse fieldsets.
{
"data": [{
"type": "articles",
"id": "1",
"attributes": {
"title": "JSON API paints my bikeshed!"
},
"links": {
"self": "http://example.com/articles/1"
},
"relationships": {
"author": {
"links": {
"self": "http://example.com/articles/1/relationships/author",
"related": "http://example.com/articles/1/author"
},
"data": { "type": "people", "id": "9" }
},
"comments": {
"links": {
"self": "http://example.com/articles/1/relationships/comments",
"related": "http://example.com/articles/1/comments"
},
"data": [
{ "type": "comments", "id": "5" },
{ "type": "comments", "id": "12" }
]
}
}
}],
"included": [{
"type": "people",
"id": "9",
"attributes": {
"first-name": "Dan",
"last-name": "Gebhardt",
"twitter": "dgeb"
},
"links": {
"self": "http://example.com/people/9"
}
}, {
"type": "comments",
"id": "5",
"attributes": {
"body": "First!"
},
"links": {
"self": "http://example.com/comments/5"
}
}, {
"type": "comments",
"id": "12",
"attributes": {
"body": "I like XML better"
},
"links": {
"self": "http://example.com/comments/12"
}
}]
}