Spring data mongo remove element in sub collection - mongodb

Question

I have this document:
{
"_id" : ObjectId("5a698b8bc2539428e3738c7d"),
"_class" : "com.xxx.xxx.inf.dao.mongo.domain.IndexDO",
"product_id" : "5a67fde8c2539414b9712482",
"cn_name" : "index - test",
"en_name" : "test index - test",
"sample_desc" : "this is a sample description",
"people_type" : 1,
"ref_literature" : [
{
"_class" : "com.xxx.xxx.inf.dao.mongo.domain.RefLiterature",
"_id" : null,
"name" : "ref 1"
},
{
"_class" : "com.xxx.xxx.inf.dao.mongo.domain.RefLiterature",
"_id" : null,
"name" : "ref 2"
}
],
"user_id" : 6,
"gmt_create" : ISODate("2018-01-25T07:47:23.800+0000"),
"detail_desc" : null,
"gmt_modified" : ISODate("2018-01-25T07:49:50.923+0000"),
"index_level" : [
{
"_class" : "com.xxx.xxx.inf.dao.mongo.domain.IndexLevel",
"_id" : ObjectId("5a72c83050abd32e7e54340d"),
"up_val" : "3.2",
"down_val" : "5.7",
"calc_symbol_type" : 2,
"level_desc" : "this is a test level desc"
}
]
}
I want to delete the element in index_level, and in here is:
{
"_class" : "com.xxx.xxx.inf.dao.mongo.domain.IndexLevel",
"_id" : ObjectId("5a72c83050abd32e7e54340d"),
"up_val" : "3.2",
"down_val" : "5.7",
"calc_symbol_type" : 2,
"level_desc" : "this is a test level desc"
}
I can remove this sub document in mongo shell with the command:
db.index.update(
{"_id":ObjectId("5a698b8bc2539428e3738c7d")},
{$pull:{"index_level": {"_id":ObjectId("5a72c83050abd32e7e54340d")}}}
)
But when I removed use mongotemplate code in below, I was failed to do this:
mongoTemplate.updateFirst(
Query(Criteria.where("_id").`is`(ObjectId("5a698b8bc2539428e3738c7d"))),
Update().pull("index_level", Query(Criteria.where("_id").`is`(ObjectId("5a72c83050abd32e7e54340d")))),
IndexDO::class.java
)
and tried below code:
mongoTemplate.updateFirst(
Query(Criteria.where("_id").`is`(ObjectId("5a698b8bc2539428e3738c7d")).and("index_level._id").`is`(ObjectId("5a72c83050abd32e7e54340d"))),
Update().pull("index_level", Query(Criteria.where("_id").`is`(ObjectId("5a72c83050abd32e7e54340d")))),
IndexDO::class.java
)
and finally, I can remove this sub document with this code:
mongoTemplate.updateFirst(
Query(Criteria.where("index_level._id").`is`(ObjectId("5a72c83050abd32e7e54340d"))),
Update().pull("index_level", Query(Criteria.where("_id").`is`(ObjectId("5a72c83050abd32e7e54340d")))),
IndexDO::class.java)
But this code has a problem, because in here the position field is _id, when I change the position field like "calc_symbol_type", the final code will remove all calc_symbol_type equals to the value which I send to the method.
So the question is where I was wrong? and the mongo shell command converts to mongotemplate code will be what?
Thanks !