More_like_this query with a filter - elasticsearch

Question

I have 1702 documents indexed in elastic search which has category as one of the fields and it also has a field named SequentialId.
I initially fetched the documents with category 1.1 which are between the document 1 and document 850 like below.
**POST testucb/docs/_search
{
"size": 1702,
"query": {
"bool": {
"must": [
{"match": {
"Category": "1.1"
}}
],
"filter":[
{
"range":
{
"SequentialId":
{
"gte":1,
"lte":850
}
}
}
]
}
}
}**
the above query gave me 834 documents which matched category 1.1.(I have the binary to parse out the 834 _ids from the resultant JSON output.)
My goal now is to provide these 834 _ids into more_like this query as a training set for the remaining documents which is my test set(docs from sequentialid 851 to 1702 is my test set)
I tried this more_like_this query below with the filter.
POST /testucb/docs/_search
{
"size": 1702,
"fields": [
"SequentialId",
"Category",
"PRIMARY_CONTENT_EN"
],
"query": {
"more_like_this":
{
"fields": [
"PRIMARY_CONTENT_EN"
],
"like":[
<-----------834 _ids goes here ---->
],
**"filter":[
{
"range":
{
"SequentialId":
{
"gte":851,
"lte":1702**
}
}
}
],
"min_term_freq": 1,
"min_doc_freq": 1,
"max_query_terms": 15,
"min_word_len": 3,
"stop_words": [
],
"boost": 2,
"include":false
}
}
}
I am getting query parsing exception which says MLT does not support filter.
I am not sure how I can provide the remaining documents with sequentialid from 851 to 1702 as my test set .
I hope am clear with what I am expecting to accomplish.Can you guys please help me how to accomplish my task? I am new to elastic search .

Answer 1

If you want to do a more like this query and filter beforehand, you should use a bool query with filter clause (Elasticsearchversion > 2.0)
POST /testucb/docs/_search
{
"size": 1702,
"fields": [
"SequentialId",
"Category",
"PRIMARY_CONTENT_EN"
],
"query": {
"bool": {
"must": [
{
"more_like_this": {
"fields": [
"PRIMARY_CONTENT_EN"
],
"like": [
<-----------834 _ids goes here ---->
],
"min_term_freq": 1,
"min_doc_freq": 1,
"max_query_terms": 15,
"min_word_len": 3,
"stop_words": [],
"boost": 2,
"include": false
}
}
],
"filter": {
"range": {
"SequentialId": {
"gte": 851,
"lte": 1702
}
}
}
}
}
}
If you use an older version of elasticsearch, you should use the filtered query instead