[#3213] Misc. tweaks: proper upsert in Hashtag, better feature toggle management.

lib/pleroma/config.ex

@@ -111,4 +111,8 @@ defmodule Pleroma.Config do
       end
     )
   end
+
+  def feature_enabled?(feature_name) do
+    get([:features, feature_name]) not in [nil, false, :disabled, :auto]
+  end
 end

lib/pleroma/hashtag.ex

@@ -27,19 +27,15 @@ defmodule Pleroma.Hashtag do
     |> String.trim()
   end
 
-  def get_by_name(name) do
-    Repo.get_by(Hashtag, name: normalize_name(name))
-  end
+  def get_or_create_by_name(name) do
+    changeset = changeset(%Hashtag{}, %{name: name})
 
-  def get_or_create_by_name(name) when is_bitstring(name) do
-    with %Hashtag{} = hashtag <- get_by_name(name) do
-      {:ok, hashtag}
-    else
-      _ ->
-        %Hashtag{}
-        |> changeset(%{name: name})
-        |> Repo.insert()
-    end
+    Repo.insert(
+      changeset,
+      on_conflict: [set: [name: get_field(changeset, :name)]],
+      conflict_target: :name,
+      returning: true
+    )
   end
 
   def get_or_create_by_names(names) when is_list(names) do

lib/pleroma/migrators/hashtags_table_migrator.ex

@@ -24,7 +24,7 @@ defmodule Pleroma.Migrators.HashtagsTableMigrator do
   defdelegate put_stat(key, value), to: State, as: :put_data_key
   defdelegate increment_stat(key, increment), to: State, as: :increment_data_key
 
-  @feature_config_path [:database, :improved_hashtag_timeline]
+  @feature_config_path [:features, :improved_hashtag_timeline]
   @reg_name {:global, __MODULE__}
 
   def whereis, do: GenServer.whereis(@reg_name)
@@ -296,16 +296,12 @@ defmodule Pleroma.Migrators.HashtagsTableMigrator do
   end
 
   defp on_complete(data_migration) do
-    cond do
-      data_migration.feature_lock ->
-        :noop
-
-      not is_nil(feature_state()) ->
-        :noop
-
-      true ->
-        Config.put(@feature_config_path, true)
-        :ok
+    if data_migration.feature_lock || feature_state() == :disabled do
+      Logger.warn("#{__MODULE__}: migration complete but feature is locked; consider enabling.")
+      :noop
+    else
+      Config.put(@feature_config_path, :enabled)
+      :ok
     end
   end
 

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -1273,7 +1273,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
       |> exclude_invisible_actors(opts)
       |> exclude_visibility(opts)
 
-    if Config.get([:database, :improved_hashtag_timeline]) do
+    if Config.feature_enabled?(:improved_hashtag_timeline) do
       query
       |> restrict_hashtag_any(opts)
       |> restrict_hashtag_all(opts)