[#3213] Fixed `HashtagsTableMigrator.count/1`.

lib/pleroma/migrators/hashtags_table_migrator.ex

@@ -18,7 +18,8 @@ defmodule Pleroma.Migrators.HashtagsTableMigrator do
   defdelegate data_migration(), to: State
 
   defdelegate state(), to: State
-  defdelegate get_stat(key, value), to: State, as: :get_data_key
+  defdelegate persist_state(), to: State, as: :persist_to_db
+  defdelegate get_stat(key, value \\ nil), to: State, as: :get_data_key
   defdelegate put_stat(key, value), to: State, as: :put_data_key
   defdelegate increment_stat(key, increment), to: State, as: :increment_data_key
 
@@ -116,7 +117,7 @@ defmodule Pleroma.Migrators.HashtagsTableMigrator do
       increment_stat(:processed_count, length(object_ids))
       increment_stat(:failed_count, length(failed_ids))
       put_stat(:records_per_second, records_per_second())
-      _ = State.persist_to_db()
+      persist_state()
 
       # A quick and dirty approach to controlling the load this background migration imposes
       sleep_interval = Config.get([:populate_hashtags_table, :sleep_interval_ms], 0)
@@ -237,17 +238,19 @@ defmodule Pleroma.Migrators.HashtagsTableMigrator do
 
   @doc "Approximate count for current iteration (including processed records count)"
   def count(force \\ false, timeout \\ :infinity) do
-    stored_count = state()[:count]
+    stored_count = get_stat(:count)
 
     if stored_count && !force do
       stored_count
     else
-      processed_count = state()[:processed_count] || 0
-      max_processed_id = data_migration().data["max_processed_id"] || 0
+      processed_count = get_stat(:processed_count, 0)
+      max_processed_id = get_stat(:max_processed_id, 0)
       query = where(query(), [object], object.id > ^max_processed_id)
 
       count = Repo.aggregate(query, :count, :id, timeout: timeout) + processed_count
       put_stat(:count, count)
+      persist_state()
+
       count
     end
   end
@@ -316,7 +319,7 @@ defmodule Pleroma.Migrators.HashtagsTableMigrator do
 
   def set_complete do
     update_status(:complete)
-    _ = State.persist_to_db()
+    persist_state()
     on_complete(data_migration())
   end