Add multiple searches

Co-authored-by: Bruno Casali <brunoocasali@gmail.com>

Update meilisearch/client.py

Co-authored-by: Bruno Casali <brunoocasali@gmail.com>

Fix error names

meilisearch/client.py

@@ -1,3 +1,5 @@
+# pylint: disable=too-many-public-methods
+
 from __future__ import annotations
 
 import base64
@@ -205,6 +207,30 @@ def index(self, uid: str) -> Index:
             return Index(self.config, uid=uid)
         raise ValueError("The index UID should not be None")
 
+    def multi_search(self, queries: List[Dict[str, Any]]) -> Dict[str, List[Dict[str, Any]]]:
+        """Multi-index search.
+
+        Parameters
+        ----------
+        queries:
+            List of dictionaries containing the specified indexes and their search queries
+            https://docs.meilisearch.com/reference/api/search.html#search-in-an-index
+
+        Returns
+        -------
+        results:
+            Dictionary of results for each index
+
+        Raises
+        ------
+        MeilisearchApiError
+            An error containing details about why Meilisearch can't process your request. Meilisearch error codes are described here: https://docs.meilisearch.com/errors/#meilisearch-errors
+        """
+        return self.http.post(
+            f"{self.config.paths.multi_search}",
+            body={"queries": queries},
+        )
+
     def get_all_stats(self) -> Dict[str, Any]:
         """Get all stats of Meilisearch
 

meilisearch/config.py

@@ -16,6 +16,7 @@ class Paths:
         task = "tasks"
         stat = "stats"
         search = "search"
+        multi_search = "multi-search"
         document = "documents"
         setting = "settings"
         ranking_rules = "ranking-rules"

tests/client/test_client_multi_search_meilisearch.py

@@ -0,0 +1,34 @@
+import pytest
+
+from meilisearch.errors import MeilisearchApiError
+
+
+def test_basic_multi_search(client, empty_index):
+    """Tests multi-search on two indexes."""
+    empty_index("indexA")
+    empty_index("indexB")
+    response = client.multi_search(
+        [{"indexUid": "indexA", "q": ""}, {"indexUid": "indexB", "q": ""}]
+    )
+
+    assert isinstance(response, dict)
+    assert response["results"][0]["indexUid"] == "indexA"
+    assert response["results"][1]["indexUid"] == "indexB"
+    assert response["results"][0]["limit"] == 20
+    assert response["results"][1]["limit"] == 20
+
+
+def test_multi_search_one_index(client, empty_index):
+    """Tests multi-search on a simple query."""
+    empty_index("indexA")
+    response = client.multi_search([{"indexUid": "indexA", "q": ""}])
+
+    assert isinstance(response, dict)
+    assert response["results"][0]["indexUid"] == "indexA"
+    assert response["results"][0]["limit"] == 20
+
+
+def test_multi_search_on_no_index(client):
+    """Tests multi-search on a non existing index."""
+    with pytest.raises(MeilisearchApiError):
+        client.multi_search([{"indexUid": "indexDoesNotExist", "q": ""}])