# Error when doing knn search with more than one embeddings in the index

**URL:** <https://discuss.elastic.co/t/error-when-doing-knn-search-with-more-than-one-embeddings-in-the-index/352411>\
**Category:** Elastic Search\
**Tags:** elastic-site-search\
**Created:** [February 2, 2024, 2:55pm UTC](https://discuss.elastic.co/t/error-when-doing-knn-search-with-more-than-one-embeddings-in-the-index/352411 "2024-02-02T14:55:00Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Carlos\_Carlota](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/carlos_carlota/32/128082_2.png) [@Carlos\_Carlota](https://discuss.elastic.co/u/Carlos_Carlota)\
**Post date:** [February 2, 2024, 2:55pm UTC](https://discuss.elastic.co/t/error-when-doing-knn-search-with-more-than-one-embeddings-in-the-index/352411/1 "2024-02-02T14:55:00Z")

</div>

\<  
I'm trying to add an extra embedding using another field with the following code:

```auto
class Search:
def __init__ (self, index_name):
    self.es = Elasticsearch(cloud_id=os.environ['ELASTIC_CLOUD_ID'],
                            api_key=os.environ['ELASTIC_API_KEY'])
    print('Connected to Elasticsearch!')
    self.model = SentenceTransformer('all-MiniLM-L6-v2')
    self.index_name = index_name

def create_index(self):
    
    self.es.indices.delete(index=self.index_name, ignore_unavailable=True)
    self.es.indices.create(index=self.index_name, mappings={
        'properties': {
            'embedding': {
                'type': 'dense_vector'
            },
            'embedding_tags': {
                'type': 'dense_vector'
            }
        }
    })

def get_embedding(self, text):
    return self.model.encode(text)

def insert_documents(self, documents):
    operations = []
    for document in documents:
        tags = document['tags'].replace(',','')
        operations.append({'index': {'_index': self.index_name}})
        operations.append({
            **document,
            'embedding': self.get_embedding(document['title']),
            'embedding_tags': self.get_embedding(tags)             
        })
    return self.es.bulk(operations=operations)

def reindex(self):
    self.create_index()
    with open('data/items.json', 'rt') as f:
        documents = json.loads(f.read())
    return self.insert_documents(documents)

def search(self, query):
    query_vector = self.get_embedding(query)

    results = self.es.search(
        knn={
            'field': 'embedding',
            'query_vector': query_vector,
            'num_candidates': 50,
            'k': 10,
        },
        _source=['title','tags','price']
    )

    res = results['hits']

    results2 = self.es.search(
        knn={
            'field': 'embedding_tags',
            'query_vector': query_vector,
            'num_candidates': 50,
            'k': 10,
        },
        _source=['title','tags','price']
    )

    res2 = results2['hits']
    return res

```

res and res2 both return no results and when I dig into the results object I get something like this:

> ObjectApiResponse({'took': 4, 'timed\_out': False, '\_shards': {'total': 20, 'successful': 1, 'skipped': 0, 'failed': 19, 'failures': [{'shard': 0, 'index': '.ds-logs-enterprise\_search.api-default-2024.01.26-000001', 'node': 'Rgiwp9MOTICr1IEhk1-DSQ', 'reason': {'type': 'query\_shard\_exception', 'reason': 'failed to create query: field [embedding] does not exist in the mapping', 'ind...

I've been trying to find some possible solutions but with no success at the moment.  
/\>

---

<div class="post-metadata">

**Author:** ![ashishtiwari1993](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ashishtiwari1993/32/135241_2.png) [@ashishtiwari1993](https://discuss.elastic.co/u/ashishtiwari1993)\
**Post date:** [February 8, 2024, 7:27pm UTC](https://discuss.elastic.co/t/error-when-doing-knn-search-with-more-than-one-embeddings-in-the-index/352411/2 "2024-02-08T19:27:15Z")

</div>

HI Carlos welcome to the Elastic community. Are you trying to add one more embedding field to the existing data stream `.ds-logs-enterprise_search.api-default-2024.01.26-000001` ?

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [March 7, 2024, 7:27pm UTC](https://discuss.elastic.co/t/error-when-doing-knn-search-with-more-than-one-embeddings-in-the-index/352411/3 "2024-03-07T19:27:19Z")

</div>

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