how to filter data from elasticsearch - elasticsearch

Question

I have create several indexes in an elasticsearch. The result of the http://localhost:9200/_cat/indices?v indicate as follows.
health status index pri rep docs.count docs.deleted store.size pri.store.size
yellow open idx_post:user:5881bc8eb46a870d958d007a 5 1 6 0 31.3kb 31.3kb
yellow open idx_usr 5 1 2 0 14.8kb 14.8kb
yellow open idx_post:group:587dc2b57a8bee13bdab6592 5 1 1 0 6.1kb 6.1kb
I am new to elasticsearch and I tried to filter data by using the index idx_usr.
http://localhost:9200/idx_usr/_search?pretty=1
it is working fine and it returns the expected values. But when I am trying to grab data by using the index idx_post it returns an Error saying the index is not found.
http://localhost:9200/idx_post/_search?pretty=1
This gives the result:
{
"error" : "IndexMissingException[[idx_post] missing]",
"status" : 404
}
If anyone can identify the reason. I would be really thankful.
Update::
This is how do I create the index. Assume that there is an object call data. And I am using an ES client call this.esClient
var _esData = {
index: "idx_post:group"+data.group_id;
type:'posts',
id:data.post_id.toString()
};
_esData['body'] = data;
this.esClient.index(_esData, function (error, response) {
if(error)
console.log(error);
callBack(response);
});

Answer 1

You can get the results you want by querying your indexes like this with a wildcard
http://localhost:9200/idx_post*/_search?pretty=1
^
|
add this

Answer 2

Because index does not exists
{
"error" : "IndexMissingException[[idx_post] missing]",
"status" : 404
}
You try to search in idx_post while _cat returns name idx_post:user:5881bc8eb46a870d958d007a and idx_post:group:587dc2b57a8bee13bdab6592