# ElasticsearchStore

> **Class** in `langchain_elasticsearch`

📖 [View in docs](https://reference.langchain.com/python/langchain-elasticsearch/vectorstores/ElasticsearchStore)

## Signature

```python
ElasticsearchStore(
    self,
    index_name: str,
    *,
    embedding: Optional[Embeddings] = None,
    client: Optional[Elasticsearch] = None,
    es_url: Optional[str] = None,
    es_cloud_id: Optional[str] = None,
    es_user: Optional[str] = None,
    es_api_key: Optional[str] = None,
    es_password: Optional[str] = None,
    vector_query_field: str = 'vector',
    query_field: str = 'text',
    distance_strategy: Optional[Literal[DistanceStrategy.COSINE, DistanceStrategy.DOT_PRODUCT, DistanceStrategy.EUCLIDEAN_DISTANCE, DistanceStrategy.MAX_INNER_PRODUCT]] = None,
    strategy: Union[BaseRetrievalStrategy, RetrievalStrategy] = ApproxRetrievalStrategy(),
    es_params: Optional[Dict[str, Any]] = None,
    custom_index_settings: Optional[Dict[str, Any]] = None,
    num_dimensions: Optional[int] = None,
    metadata_mappings: Optional[Dict[str, Any]] = None,
)
```

## Extends

- `_ElasticsearchStore`

---

[View source on GitHub](https://github.com/langchain-ai/langchain-elastic/blob/e78a327f38e09abd10128ed28c8774e9a8f9fec0/libs/elasticsearch/langchain_elasticsearch/vectorstores.py#L80)