fix empty queries returning 50 results

lib/pleroma/elasticsearch/store.ex

@@ -142,6 +142,8 @@ def bulk_post([] = data, :hashtags) do
 
   def bulk_post(_, :hashtags), do: {:ok, nil}
 
+  def search(_, _, _, :skip), do: []
+
   def search(:raw, index, type, q) do
     with {:ok, raw_results} <- Elastix.Search.search(url(), index, [type], q) do
       results =

lib/pleroma/search/elasticsearch.ex

@@ -8,6 +8,11 @@ defmodule Pleroma.Search.Elasticsearch do
   alias Pleroma.Web.Endpoint
 
   def es_query(:activity, query) do
+    must = Parsers.Activity.parse(query)
+
+    if must == [] do
+      :skip
+    else
       %{
         size: 50,
         terminate_after: 50,
@@ -17,26 +22,38 @@ def es_query(:activity, query) do
         ],
         query: %{
           bool: %{
-          must: Parsers.Activity.parse(query)
+            must: must
           }
         }
       }
     end
+  end
 
   def es_query(:user, query) do
+    must = Parsers.User.parse(query)
+
+    if must == [] do
+      :skip
+    else
       %{
         size: 50,
         terminate_after: 50,
         timeout: "5s",
         query: %{
           bool: %{
-          must: Parsers.User.parse(query)
+            must: must
           }
         }
       }
     end
+  end
 
   def es_query(:hashtag, query) do
+    must = Parsers.Hashtag.parse(query)
+
+    if must == [] do
+      :skip
+    else
       %{
         size: 50,
         terminate_after: 50,
@@ -48,6 +65,7 @@ def es_query(:hashtag, query) do
         }
       }
     end
+  end
 
   @impl Pleroma.Search
   def search(%{assigns: %{user: user}} = _conn, %{q: query} = _params, _options) do