Term query to get children using parent id

Create index and mappings

#Remove old index
curl -XDELETE "http://localhost:9200/myindex"

#Create index
curl -XPUT "http://localhost:9200/myindex"

curl -XPOST "http://localhost:9200/myindex/Parent/_mapping" -d '
{	"Parent" : 
	{		"properties" : {
				"name" : {
					"type" :"string",
					"index":"analyzed"
					}
				}
	}
}'


curl -XPOST "http://localhost:9200/myindex/Child/_mapping" -d '
{
    "Child" :{
        "_parent": {
           "type": "Parent"
        },
		"properties" : {
			"name" : {
				"type" :"string",
				"index":"analyzed"
			}
		}
    }
    
}'


curl -XPOST "http://localhost:9200/myindex/GrandChild/_mapping" -d '
{
	 "GrandChild" :{
        "_parent": {
           "type": "Child"
        },
		"properties" : {
			"name" : {
				"type" :"string",
				"index":"analyzed"
			}
		}
    }
}'

insert some data

curl -s -XPOST "http://localhost:9200/_bulk?pretty=true" --data-binary '
{ "index" : { "_index" : "myindex", "_type" : "Parent", "_id" : "alice" } }
{ "name" : "Alice" }
{ "index" : { "_index" : "myindex", "_type" : "Child", "_id" : "bob", "parent" : "alice" } }
{ "name" : "Bob"}
{ "index" : { "_index" : "myindex", "_type" : "GrandChild", "_id" : "gc1", "parent" : "bob", "routing" : "alice" } }
{ "name" : "grand child 1" }
{ "index" : { "_index" : "myindex", "_type" : "GrandChild", "_id" : "gc2", "parent" : "bob", "routing" : "alice" } }
{ "name" : "grand child 2"}
'

search

#this query works
curl -s -XPOST "http://localhost:9200/myindex/Child/_search?routing=alice" -d ' 
{
    "query" : {
        "term" : { "_parent" : "alice" }
    }
}'


#but not this one. What am I doing wrong?
curl -s -XPOST "http://localhost:9200/myindex/GrandChild/_search?routing=alice" -d ' 
{
    "query" : {
        "term" : { "_parent" : "bob" }
    }
}'