Set custom "_id" to ElasticSearch using JSON file - json

Question

I am new to ElasticSearch and I need to know if it is possible to assign a custom id to my input. I am using the LinkSO dataset. The JSON file should look like this:
{"index": {"_id": "11"}}
{"title": "title1", "body": "body1", "answer": "answer1"}
{"index": {"_id": "22"}}
{"title": "title2", "body": "body2", "answer": "answer2"}
My PUT command is
PUT /test
{
"settings": {
"analysis": {
"analyzer": {
"my_analyzer": {
"tokenizer": "whitespace",
"filter": [
"lowercase",
"porter_stem"
]
}
}
}
},
"mappings": {
"properties": {
"title": {
"type": "text",
"analyzer": "my_analyzer",
"similarity": "BM25"
},
"body": {
"type": "text",
"analyzer": "my_analyzer",
"similarity": "BM25"
},
"answer": {
"type": "text",
"analyzer": "my_analyzer",
"similarity": "BM25"
}
}
}
}
I am using this command on cmd
curl -s -H "Content-Type: application/json" -XPOST localhost:9200/test/_doc/_bulk --data-binary "#test.json"
When inserting only one json data like
{"title": "title1", "body": "body1", "answer": "answer1"}
It works fine. The data is inserted and I get the output. But whenever I try to add 2 data like
{"title": "title1", "body": "body1", "answer": "answer1"}
{"title": "title2", "body": "body2", "answer": "answer2"}
The json file shows end of file expected error. The same happens when I use add index on the json file.
Can someone guide me how to work it and how can I add the "_id" as well because ElasticSearch is giving id on its own as _bulk

Answer 1

In your file you need to have the data as below. To set the id you need this line, {"index": {"_id": "11"}}, before each document. Another important point is to add a line break at the end of the file.
{"index": {"_id": "11"}}
{"title": "title1", "body": "body1", "answer": "answer1"}
{"index": {"_id": "22"}}
{"title": "title2", "body": "body2", "answer": "answer2"}
\n