update Weaviate to support multi tenancy (#11842)

- **Description:** update Weaviate to support multi tenancy
  - **Issue:** 9956
  - **Dependencies:** 
  - **Tag maintainer:** hwchase17
  - **Twitter handle:** dsx1986_

libs/langchain/langchain/vectorstores/weaviate.py

@@ -209,6 +209,8 @@ class Weaviate(VectorStore):
         query_obj = self._client.query.get(self._index_name, self._query_attrs)
         if kwargs.get("where_filter"):
             query_obj = query_obj.with_where(kwargs.get("where_filter"))
+        if kwargs.get("tenant"):
+            query_obj = query_obj.with_tenant(kwargs.get("tenant"))
         if kwargs.get("additional"):
             query_obj = query_obj.with_additional(kwargs.get("additional"))
         result = query_obj.with_near_text(content).with_limit(k).do()
@@ -228,6 +230,8 @@ class Weaviate(VectorStore):
         query_obj = self._client.query.get(self._index_name, self._query_attrs)
         if kwargs.get("where_filter"):
             query_obj = query_obj.with_where(kwargs.get("where_filter"))
+        if kwargs.get("tenant"):
+            query_obj = query_obj.with_tenant(kwargs.get("tenant"))
         if kwargs.get("additional"):
             query_obj = query_obj.with_additional(kwargs.get("additional"))
         result = query_obj.with_near_vector(vector).with_limit(k).do()
@@ -304,6 +308,8 @@ class Weaviate(VectorStore):
         query_obj = self._client.query.get(self._index_name, self._query_attrs)
         if kwargs.get("where_filter"):
             query_obj = query_obj.with_where(kwargs.get("where_filter"))
+        if kwargs.get("tenant"):
+            query_obj = query_obj.with_tenant(kwargs.get("tenant"))
         results = (
             query_obj.with_additional("vector")
             .with_near_vector(vector)
@@ -343,6 +349,8 @@ class Weaviate(VectorStore):
         query_obj = self._client.query.get(self._index_name, self._query_attrs)
         if kwargs.get("where_filter"):
             query_obj = query_obj.with_where(kwargs.get("where_filter"))
+        if kwargs.get("tenant"):
+            query_obj = query_obj.with_tenant(kwargs.get("tenant"))
 
         embedded_query = self._embedding.embed_query(query)
         if not self._by_text: