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diff --git a/lib/pleroma/migrators/hashtags_table_migrator.ex b/lib/pleroma/migrators/hashtags_table_migrator.ex
index b40578d50..47de5e134 100644
--- a/lib/pleroma/migrators/hashtags_table_migrator.ex
+++ b/lib/pleroma/migrators/hashtags_table_migrator.ex
@@ -1,228 +1,234 @@
# Pleroma: A lightweight social networking server
# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Migrators.HashtagsTableMigrator do
use GenServer
require Logger
import Ecto.Query
alias __MODULE__.State
alias Pleroma.Config
alias Pleroma.DataMigration
alias Pleroma.Hashtag
alias Pleroma.Object
alias Pleroma.Repo
defdelegate state(), to: State, as: :get
defdelegate put_stat(key, value), to: State, as: :put
defdelegate increment_stat(key, increment), to: State, as: :increment
defdelegate data_migration(), to: DataMigration, as: :populate_hashtags_table
@reg_name {:global, __MODULE__}
def whereis, do: GenServer.whereis(@reg_name)
def start_link(_) do
case whereis() do
nil ->
GenServer.start_link(__MODULE__, nil, name: @reg_name)
pid ->
{:ok, pid}
end
end
@impl true
def init(_) do
{:ok, nil, {:continue, :init_state}}
end
@impl true
def handle_continue(:init_state, _state) do
{:ok, _} = State.start_link(nil)
update_status(:init)
data_migration = data_migration()
manual_migrations = Config.get([:instance, :manual_data_migrations], [])
cond do
Config.get(:env) == :test ->
update_status(:noop)
is_nil(data_migration) ->
update_status(:halt, "Data migration does not exist.")
data_migration.state == :manual or data_migration.name in manual_migrations ->
update_status(:noop, "Data migration is in manual execution state.")
data_migration.state == :complete ->
handle_success(data_migration)
true ->
send(self(), :migrate_hashtags)
end
{:noreply, nil}
end
@impl true
def handle_info(:migrate_hashtags, state) do
data_migration = data_migration()
persistent_data = Map.take(data_migration.data, ["max_processed_id"])
{:ok, data_migration} =
DataMigration.update(data_migration, %{state: :running, data: persistent_data})
update_status(:running)
Logger.info("Starting transferring object embedded hashtags to `hashtags` table...")
max_processed_id = data_migration.data["max_processed_id"] || 0
# Note: most objects have Mention-type AS2 tags and no hashtags (but we can't filter them out)
from(
object in Object,
left_join: hashtag in assoc(object, :hashtags),
where: object.id > ^max_processed_id,
where: is_nil(hashtag.id),
where:
fragment("(?)->'tag' IS NOT NULL AND (?)->'tag' != '[]'::jsonb", object.data, object.data),
select: %{
id: object.id,
tag: fragment("(?)->'tag'", object.data)
}
)
|> Repo.chunk_stream(100, :batches, timeout: :infinity)
|> Stream.each(fn objects ->
object_ids = Enum.map(objects, & &1.id)
failed_ids =
objects
|> Enum.map(&transfer_object_hashtags(&1))
|> Enum.filter(&(elem(&1, 0) == :error))
|> Enum.map(&elem(&1, 1))
for failed_id <- failed_ids do
_ =
Repo.query(
"INSERT INTO data_migration_failed_ids(data_migration_id, record_id) " <>
"VALUES ($1, $2) ON CONFLICT DO NOTHING;",
[data_migration.id, failed_id]
)
end
_ =
Repo.query(
"DELETE FROM data_migration_failed_ids WHERE id = ANY($1)",
[object_ids -- failed_ids]
)
max_object_id = Enum.at(object_ids, -1)
put_stat(:max_processed_id, max_object_id)
increment_stat(:processed_count, length(object_ids))
increment_stat(:failed_count, length(failed_ids))
persist_stats(data_migration)
# A quick and dirty approach to controlling the load this background migration imposes
sleep_interval = Config.get([:populate_hashtags_table, :sleep_interval_ms], 0)
Process.sleep(sleep_interval)
end)
|> Stream.run()
with {:ok, %{rows: [[0]]}} <-
Repo.query(
"SELECT COUNT(record_id) FROM data_migration_failed_ids WHERE data_migration_id = $1;",
[data_migration.id]
) do
_ = DataMigration.update_state(data_migration, :complete)
handle_success(data_migration)
else
_ ->
_ = DataMigration.update_state(data_migration, :failed)
update_status(:failed, "Please check data_migration_failed_ids records.")
end
{:noreply, state}
end
defp transfer_object_hashtags(object) do
hashtags = Object.object_data_hashtags(%{"tag" => object.tag})
Repo.transaction(fn ->
with {:ok, hashtag_records} <- Hashtag.get_or_create_by_names(hashtags) do
for hashtag_record <- hashtag_records do
with {:ok, _} <-
Repo.query(
"insert into hashtags_objects(hashtag_id, object_id) values ($1, $2);",
[hashtag_record.id, object.id]
) do
nil
else
{:error, e} ->
error =
"ERROR: could not link object #{object.id} and hashtag " <>
"#{hashtag_record.id}: #{inspect(e)}"
Logger.error(error)
Repo.rollback(object.id)
end
end
object.id
else
e ->
error = "ERROR: could not create hashtags for object #{object.id}: #{inspect(e)}"
Logger.error(error)
Repo.rollback(object.id)
end
end)
end
defp persist_stats(data_migration) do
runner_state = Map.drop(state(), [:status])
_ = DataMigration.update(data_migration, %{data: runner_state})
end
defp handle_success(data_migration) do
update_status(:complete)
- unless data_migration.feature_lock || Config.improved_hashtag_timeline() do
- Config.put(Config.improved_hashtag_timeline_path(), true)
- end
+ cond do
+ data_migration.feature_lock ->
+ :noop
+
+ not is_nil(Config.improved_hashtag_timeline()) ->
+ :noop
- :ok
+ true ->
+ Config.put(Config.improved_hashtag_timeline_path(), true)
+ :ok
+ end
end
def failed_objects_query do
from(o in Object)
|> join(:inner, [o], dmf in fragment("SELECT * FROM data_migration_failed_ids"),
on: dmf.record_id == o.id
)
|> where([_o, dmf], dmf.data_migration_id == ^data_migration().id)
|> order_by([o], asc: o.id)
end
def force_continue do
send(whereis(), :migrate_hashtags)
end
def force_restart do
{:ok, _} = DataMigration.update(data_migration(), %{state: :pending, data: %{}})
force_continue()
end
defp update_status(status, message \\ nil) do
put_stat(:status, status)
put_stat(:message, message)
end
end

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