[#3213] hashtags: altered name type to text. hashtags_objects: removed unused index. HashtagsTableMigrator: records_per_second calculation fix. ActivityPub: hashtags-related options normalization.

lib/pleroma/hashtag.ex

@@ -21,10 +21,14 @@ defmodule Pleroma.Hashtag do
     timestamps()
   end
 
+  def normalize_name(name) do
+    name
+    |> String.downcase()
+    |> String.trim()
+  end
+
   def get_by_name(name) do
-    from(h in Hashtag)
+    Repo.get_by(Hashtag, name: normalize_name(name))
-    |> where([h], fragment("name = ?::citext", ^String.downcase(name)))
-    |> Repo.one()
   end
 
   def get_or_create_by_name(name) when is_bitstring(name) do
@@ -39,7 +43,7 @@ def get_or_create_by_name(name) when is_bitstring(name) do
   end
 
   def get_or_create_by_names(names) when is_list(names) do
-    names = Enum.map(names, &String.downcase/1)
+    names = Enum.map(names, &normalize_name/1)
     timestamp = NaiveDateTime.truncate(NaiveDateTime.utc_now(), :second)
 
     structs =
@@ -53,10 +57,12 @@ def get_or_create_by_names(names) when is_list(names) do
     try do
       with {:ok, %{query_op: hashtags}} <-
              Multi.new()
-             |> Multi.insert_all(:insert_all_op, Hashtag, structs, on_conflict: :nothing)
+             |> Multi.insert_all(:insert_all_op, Hashtag, structs,
+               on_conflict: :nothing,
+               conflict_target: :name
+             )
              |> Multi.run(:query_op, fn _repo, _changes ->
-               {:ok,
+               {:ok, Repo.all(from(ht in Hashtag, where: ht.name in ^names))}
-                Repo.all(from(ht in Hashtag, where: ht.name in fragment("?::citext[]", ^names)))}
              end)
              |> Repo.transaction() do
         {:ok, hashtags}
@@ -71,7 +77,7 @@ def get_or_create_by_names(names) when is_list(names) do
   def changeset(%Hashtag{} = struct, params) do
     struct
     |> cast(params, [:name])
-    |> update_change(:name, &String.downcase/1)
+    |> update_change(:name, &normalize_name/1)
     |> validate_required([:name])
     |> unique_constraint(:name)
   end

lib/pleroma/migrators/hashtags_table_migrator.ex

@@ -82,6 +82,7 @@ def handle_info(:migrate_hashtags, state) do
     State.reinit()
 
     update_status(:running)
+    put_stat(:iteration_processed_count, 0)
     put_stat(:started_at, NaiveDateTime.utc_now())
 
     data_migration_id = data_migration_id()
@@ -127,6 +128,7 @@ def handle_info(:migrate_hashtags, state) do
       max_object_id = Enum.at(object_ids, -1)
 
       put_stat(:max_processed_id, max_object_id)
+      increment_stat(:iteration_processed_count, length(object_ids))
       increment_stat(:processed_count, length(object_ids))
       increment_stat(:failed_count, length(failed_ids))
       increment_stat(:affected_count, chunk_affected_count)
@@ -176,7 +178,7 @@ def fault_rate do
   end
 
   defp records_per_second do
-    get_stat(:processed_count, 0) / Enum.max([running_time(), 1])
+    get_stat(:iteration_processed_count, 0) / Enum.max([running_time(), 1])
   end
 
   defp running_time do

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -10,6 +10,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
   alias Pleroma.Conversation
   alias Pleroma.Conversation.Participation
   alias Pleroma.Filter
+  alias Pleroma.Hashtag
   alias Pleroma.Maps
   alias Pleroma.Notification
   alias Pleroma.Object
@@ -698,8 +699,6 @@ defp restrict_embedded_tag_all(_query, %{tag_all: _tag_all, skip_preload: true})
   end
 
   defp restrict_embedded_tag_all(query, %{tag_all: [_ | _] = tag_all}) do
-    tag_all = Enum.map(tag_all, &String.downcase/1)
-
     from(
       [_activity, object] in query,
       where: fragment("(?)->'tag' \\?& (?)", object.data, ^tag_all)
@@ -717,8 +716,6 @@ defp restrict_embedded_tag_any(_query, %{tag: _tag, skip_preload: true}) do
   end
 
   defp restrict_embedded_tag_any(query, %{tag: [_ | _] = tag_any}) do
-    tag_any = Enum.map(tag_any, &String.downcase/1)
-
     from(
       [_activity, object] in query,
       where: fragment("(?)->'tag' \\?| (?)", object.data, ^tag_any)
@@ -736,8 +733,6 @@ defp restrict_embedded_tag_reject_any(_query, %{tag_reject: _tag_reject, skip_pr
   end
 
   defp restrict_embedded_tag_reject_any(query, %{tag_reject: [_ | _] = tag_reject}) do
-    tag_reject = Enum.map(tag_reject, &String.downcase/1)
-
     from(
       [_activity, object] in query,
       where: fragment("not (?)->'tag' \\?| (?)", object.data, ^tag_reject)
@@ -766,7 +761,7 @@ defp restrict_hashtag_all(query, %{tag_all: [_ | _] = tags}) do
         fragment(
           """
           (SELECT array_agg(hashtags.name) FROM hashtags JOIN hashtags_objects
-            ON hashtags_objects.hashtag_id = hashtags.id WHERE hashtags.name = ANY(?::citext[])
+            ON hashtags_objects.hashtag_id = hashtags.id WHERE hashtags.name = ANY(?)
               AND hashtags_objects.object_id = ?) @> ?
           """,
           ^tags,
@@ -787,35 +782,13 @@ defp restrict_hashtag_any(_query, %{tag: _tag, skip_preload: true}) do
   end
 
   defp restrict_hashtag_any(query, %{tag: [_ | _] = tags}) do
-    # TODO: refactor: debug / experimental feature
-    if Config.get([:database, :improved_hashtag_timeline]) == :preselect_hashtag_ids do
-      hashtag_ids =
-        from(ht in Pleroma.Hashtag,
-          where: fragment("name = ANY(?::citext[])", ^tags),
-          select: ht.id
-        )
-        |> Repo.all()
-
-      from(
-        [_activity, object] in query,
-        where:
-          fragment(
-            """
-            EXISTS (
-            SELECT 1 FROM hashtags_objects WHERE hashtag_id = ANY(?) AND object_id = ? LIMIT 1)
-            """,
-            ^hashtag_ids,
-            object.id
-          )
-      )
-    else
     from(
       [_activity, object] in query,
       where:
         fragment(
           """
           EXISTS (SELECT 1 FROM hashtags JOIN hashtags_objects
-              ON hashtags_objects.hashtag_id = hashtags.id WHERE hashtags.name = ANY(?::citext[])
+            ON hashtags_objects.hashtag_id = hashtags.id WHERE hashtags.name = ANY(?)
               AND hashtags_objects.object_id = ? LIMIT 1)
           """,
           ^tags,
@@ -823,7 +796,6 @@ defp restrict_hashtag_any(query, %{tag: [_ | _] = tags}) do
         )
     )
   end
-  end
 
   defp restrict_hashtag_any(query, %{tag: tag}) when is_binary(tag) do
     restrict_hashtag_any(query, %{tag: [tag]})
@@ -842,7 +814,7 @@ defp restrict_hashtag_reject_any(query, %{tag_reject: [_ | _] = tags_reject}) do
         fragment(
           """
           NOT EXISTS (SELECT 1 FROM hashtags JOIN hashtags_objects
-            ON hashtags_objects.hashtag_id = hashtags.id WHERE hashtags.name = ANY(?::citext[])
+            ON hashtags_objects.hashtag_id = hashtags.id WHERE hashtags.name = ANY(?)
               AND hashtags_objects.object_id = ? LIMIT 1)
           """,
           ^tags_reject,
@@ -1220,6 +1192,21 @@ defp maybe_order(query, %{order: :asc}) do
 
   defp maybe_order(query, _), do: query
 
+  defp normalize_fetch_activities_query_opts(opts) do
+    Enum.reduce([:tag, :tag_all, :tag_reject], opts, fn key, opts ->
+      case opts[key] do
+        value when is_bitstring(value) ->
+          Map.put(opts, key, Hashtag.normalize_name(value))
+
+        value when is_list(value) ->
+          Map.put(opts, key, Enum.map(value, &Hashtag.normalize_name/1))
+
+        _ ->
+          opts
+      end
+    end)
+  end
+
   defp fetch_activities_query_ap_ids_ops(opts) do
     source_user = opts[:muting_user]
     ap_id_relationships = if source_user, do: [:mute, :reblog_mute], else: []
@@ -1243,6 +1230,8 @@ defp fetch_activities_query_ap_ids_ops(opts) do
   end
 
   def fetch_activities_query(recipients, opts \\ %{}) do
+    opts = normalize_fetch_activities_query_opts(opts)
+
     {restrict_blocked_opts, restrict_muted_opts, restrict_muted_reblogs_opts} =
       fetch_activities_query_ap_ids_ops(opts)
 

priv/repo/migrations/20201221203824_create_hashtags_objects.exs

@@ -7,7 +7,7 @@ def change do
       add(:object_id, references(:objects), null: false, primary_key: true)
     end
 
-    create_if_not_exists(unique_index(:hashtags_objects, [:hashtag_id, :object_id]))
+    # Note: PK index: "hashtags_objects_pkey" PRIMARY KEY, btree (hashtag_id, object_id)
     create_if_not_exists(index(:hashtags_objects, [:object_id]))
   end
 end

priv/repo/migrations/20210222183840_remove_hashtags_objects_duplicate_index.exs

@@ -0,0 +1,11 @@
+defmodule Pleroma.Repo.Migrations.RemoveHashtagsObjectsDuplicateIndex do
+  use Ecto.Migration
+
+  @moduledoc "Removes `hashtags_objects_hashtag_id_object_id_index` index (duplicate of PK index)."
+
+  def up do
+    drop_if_exists(unique_index(:hashtags_objects, [:hashtag_id, :object_id]))
+  end
+
+  def down, do: nil
+end

priv/repo/migrations/20210222184616_change_hashtags_name_to_text.exs

@@ -0,0 +1,15 @@
+defmodule Pleroma.Repo.Migrations.ChangeHashtagsNameToText do
+  use Ecto.Migration
+
+  def up do
+    alter table(:hashtags) do
+      modify(:name, :text)
+    end
+  end
+
+  def down do
+    alter table(:hashtags) do
+      modify(:name, :citext)
+    end
+  end
+end