ArangoDB can't send request with curl - http

Question

I can't unserstand what I am doing wrong, but when I am sending next request with curl, I am getting error:
echo {"id":1,"question":"aaa"},{"id":2,"question":"bbb?"} | curl -X POST --data-binary #- --dump - http://localhost:8529/_db/otest/_api/document/?collection=sitetestanswers
HTTP/1.1 100 (Continue)
HTTP/1.1 400 Bad Request
Server: ArangoDB
Connection: Keep-Alive
Content-Type: application/json; charset=utf-8
Content-Length: 100
{"error":true,"errorMessage":"failed to parse json object: expecting EOF","code":400,"errorNum":600}
Any ideas? I tied wrap it's to [...]. Nothing do not help.
With [...] validator mark this as valid
Same with D. Here is my code:
void sendQuestionsToArangoDB(Json questions)
{
string collectionUrl = "http://localhost:8529/_db/otest/_api/document/?collection=sitetestanswers";
auto rq = Request();
rq.verbosity = 2;
string s = `{"id":"1","question":"foo?"},{"id":2}`;
auto rs = rq.post(collectionUrl, s, "application/json");
writeln("SENDED");
}
--
POST /_db/otest/_api/document/?collection=sitetestanswers HTTP/1.1
Content-Length: 37
Connection: Close
Host: localhost:8529
Content-Type: application/json
HTTP/1.1 400 Bad Request
Server: ArangoDB
Connection: Close
Content-Type: application/json; charset=utf-8
Content-Length: 100
100 bytes of body received
For D I use this lib: https://github.com/ikod/dlang-requests
Same issue with vibed.

Answer 1

ArangoDB do not understand JSON if it's come ass array like [...]. It should be passed as key-value. So if you need pass array it should have key mykey : [].
Here is working code:
import std.stdio;
import requests.http;
void main(string[] args)
{
string collectionUrl = "http://localhost:8529/_db/otest/_api/document?collection=sitetestanswers";
auto rq = Request();
rq.verbosity = 2;
string s = `{"some_data":[{"id":1, "question":"aaa"},{"id":2, "question":"bbb"}]}`;
auto rs = rq.post(collectionUrl, s, "application/json");
writeln("SENDED");
}
otest - DB name
sitetestanswers - collection name (should be created in DB)

Answer 2

echo '[{"id":1,"question":"aaa"},{"id":2,"question":"bbb?"}]'
should do the trick. You need to put ticks around the JSON. The array brackets are necessary otherwise this is not valid JSON.

Answer 3

You are trying to send multiple documents. The data in the original question separates the documents by comma ({"id":1,"question":"aaa"},{"id":2,"question":"bbb?"}) which is invalid JSON. Thus the failed to parse json object answer from ArangoDB.
Putting the documents into angular brackets ([ ... ]) as some of the commentors suggested will make the request payload valid JSON again.
However, you're sending the data to a server endpoint that handles a single document. The API for POST /_api/document/?collection=... currently accepts a single document at a time. It does not work with multiple documents in a single request. It expects a JSON object, and whenever it is sent something different it will respond with an error code.
If you're looking for batch inserts, please try the API POST /_api/import, described in the manual here: https://docs.arangodb.com/HttpBulkImports/ImportingSelfContained.html
This will work with multiple documents in a single request. ArangoDB 3.0 will also allow sending multiple documents to the POST /_api/document?collection=... API, but this version is not yet released. A technical preview will be available soon however.