How to query objects through a Pointer using REST API?

Question

I have this structure hosted on parse.com:

Event

objectId: String
playerId: Pointer<Player>
matchId: Pointer<Match>
some other properties not relevant to the question

Match

objectId: String
ownerId: String
matchDate: Date

I want to retrieve all events related to one specific Match using REST, but there is something wrong with the query I'm using.

This is the query I'm using (ruby with HTTParty gem):

base_uri = "https://api.parse.com/1/classes"
endpoint = 'Event/?&include=matchId&where={"ownerId":"201"}'
app_id = "app_id"
rest_api_key = "api_key"
headers = {"X-Parse-Application-Id" => app_id, 
    "X-Parse-REST-API-Key" => rest_api_key, 
    "Content-Type" => "application/json"}

response = HTTParty.get(URI.encode("#{base_uri}/#{endpoint}"), headers: headers)

Afaik. currently there is no standard way or even recommendation to describe queries. There are non-standard solutions like the one you found, or e.g. github.com/persvr/rql . The only general standard solution I know of, is describing a query param with JSON-LD, hydra and URI templates and put SPARQL into that param. Afaik there is no RDF vocab, which can describe queries. Maybe I'll make one, but I won't have time to do this for months. — inf3rno
– inf3rno, Commented Jan 19, 2015 at 7:49

Ramses · Accepted Answer · 2018-10-16 16:26:04Z

5

Turns out that it's done the same way as relational queries. Here is the working query:

endpoint = 'Event/?where={"matchId":{"$inQuery":{"where":{"ownerId":201},"className":"Match"}}}'

edited Oct 16, 2018 at 16:26

answered Jan 19, 2015 at 6:17

Ramses

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