How to create google datastore composite indices via REST API? - rest

Question

I am trying to change the order of my results but I keep getting an error saying You need an index to execute this query.
In my console, I doesn't say that any indices exist, but I set most of the indexed options to true.
I know in Java, I can create indices that relate to multiple properties either ascending or descending, how do I do this with the REST API?
Following the REST API docs for Google Datastore, my entities are created like this:
{
"mode": "TRANSACTIONAL",
"transaction": "Eb2wksWfYDjkGkkABRmGMQ_vKGijwNwm-tbxAbUPRt8N2RaUCynjSbGT7jFQw3pgaDCT7U0drs3RTPLSIN8TQikdqkdl7pLm2rkMqORmKlO_I_dp",
"mutation": {
"insertAutoId": [
{
"key": {
"path": [
{
"kind": "Attendance"
}
]
},
"properties": {
"section": {
"indexed": true,
"stringValue": "Venturers"
},
"date": {
"dateTimeValue": "2015-01-16T00:00:00+00:00",
"indexed": true
},
"attendee": {
"indexed": true,
"keyValue": {
"path": [
{
"id": "5659313586569216",
"kind": "Attendee"
}
]
}
},
"presence": {
"indexed": false,
"integerValue": 0
}
}
}
]
}
}
And I am trying to query like this:
{
"gqlQuery": {
"allowLiteral": true,
"queryString": "SELECT * FROM Attendance WHERE section = #section ORDER BY date ASC",
"nameArgs": [
{
"name": "section",
"value": {
"stringValue": "Venturers"
}
}
]
}
}
And I get this error:
{
"error": {
"errors": [
{
"domain": "global",
"reason": "FAILED_PRECONDITION",
"message": "no matching index found.",
"locationType": "header",
"location": "If-Match"
}
],
"code": 412,
"message": "no matching index found."
}
}

Answer 1

For future reference:
You can't make a composite index directly through the REST API. You must go through php app engine.
How to build datastore indexes (PHP GAE)