google datastore api explorer example - google-cloud-datastore

Question

I am trying to understand
https://developers.google.com/apis-explorer/#p/datastore/v1beta1/datastore.datasets.blindWrite
but I always get
503 Service Unavailable
{
"error": {
"errors": [
{
"domain": "global",
"reason": "backendError",
"message": "Backend Error"
}
],
"code": 503,
"message": "Backend Error"
}
}
Can you provide a example as simple as possible I can paste to verify it actually works?
I tried something like this.
{
"mutation": {
"insertAutoId": [
{
"key": {
"path": [
{
"kind": "person",
"name": "gert"
}
]
}
}
]
}
}

Answer 1

Assuming that you followed one of the first two activation flows described in the documentation. And created the project recently, an App Engine application should be already associated with your project.
You need to:
Click Authorize your request using OAuth 2.0
Leave https://www.googleapis.com/auth/userinfo.email scope checked
Add https://www.googleapis.com/auth/datastore under Add additional scopes (optional)
Click Authorize and grant the permission
Specify the datasetId parameter (same as your project-id)
Use insert or upsert instead of insertAutoId if the key is complete (kind w/ name or id).
Example:
POST https://www.googleapis.com/datastore/v1beta1/datasets/my-dataset-id/blindWrite...
Content-Type: application/json
Authorization: Bearer ...
X-JavaScript-User-Agent: Google APIs Explorer
{
"mutation": {
"insert": [
{
"key": {
"path": [
{
"kind": "Foo",
"name": "iamfoo"
}
]
}
}
]
}
}
200 OK
{
"kind": "datastore#blindWriteResponse",
"mutationResult": {
"indexUpdates": 1
}
}