Load less data in indexing

lib/philomena/comments.ex

@@ -9,11 +9,13 @@ defmodule Philomena.Comments do
 
   alias PhilomenaQuery.Search
   alias Philomena.UserStatistics
+  alias Philomena.Users.User
   alias Philomena.Comments.Comment
   alias Philomena.Comments.SearchIndex, as: CommentIndex
   alias Philomena.IndexWorker
   alias Philomena.Images.Image
   alias Philomena.Images
+  alias Philomena.Tags.Tag
   alias Philomena.Notifications
   alias Philomena.Versions
   alias Philomena.Reports
@@ -234,7 +236,18 @@ defmodule Philomena.Comments do
   end
 
   def indexing_preloads do
-    [:user, image: :tags]
+    user_query = select(User, [u], map(u, [:id, :name]))
+    tag_query = select(Tag, [t], map(t, [:id]))
+
+    image_query =
+      Image
+      |> select([i], struct(i, [:approved, :hidden_from_users, :id]))
+      |> preload(tags: ^tag_query)
+
+    [
+      user: user_query,
+      image: image_query
+    ]
   end
 
   def perform_reindex(column, condition) do

lib/philomena/images.ex

@@ -847,16 +847,25 @@ defmodule Philomena.Images do
   end
 
   def indexing_preloads do
+    user_query = select(User, [u], map(u, [:id, :name]))
+    sources_query = select(Source, [s], map(s, [:image_id, :source]))
+    alias_tags_query = select(Tag, [t], map(t, [:aliased_tag_id, :name]))
+
+    base_tags_query =
+      Tag
+      |> select([t], [:category, :id, :name])
+      |> preload(aliases: ^alias_tags_query)
+
     [
-      :user,
-      :favers,
-      :downvoters,
-      :upvoters,
-      :hiders,
-      :deleter,
       :gallery_interactions,
-      :sources,
-      tags: [:aliases, :aliased_tag]
+      sources: sources_query,
+      user: user_query,
+      favers: user_query,
+      downvoters: user_query,
+      upvoters: user_query,
+      hiders: user_query,
+      deleter: user_query,
+      tags: base_tags_query
     ]
   end
 

lib/philomena/posts.ex

@@ -11,6 +11,7 @@ defmodule Philomena.Posts do
   alias Philomena.Topics.Topic
   alias Philomena.Topics
   alias Philomena.UserStatistics
+  alias Philomena.Users.User
   alias Philomena.Posts.Post
   alias Philomena.Posts.SearchIndex, as: PostIndex
   alias Philomena.IndexWorker
@@ -279,7 +280,17 @@ defmodule Philomena.Posts do
   end
 
   def indexing_preloads do
-    [:user, topic: :forum]
+    user_query = select(User, [u], map(u, [:id, :name]))
+
+    topic_query =
+      Topic
+      |> select([t], struct(t, [:forum_id, :title]))
+      |> preload([:forum])
+
+    [
+      user: user_query,
+      topic: topic_query
+    ]
   end
 
   def perform_reindex(column, condition) do