139 lines
4.1 KiB
Elixir
139 lines
4.1 KiB
Elixir
# Pleroma: A lightweight social networking server
|
|
# Copyright © 2017-2023 Pleroma Authors <https://pleroma.social/>
|
|
# SPDX-License-Identifier: AGPL-3.0-only
|
|
|
|
defmodule Pleroma.Migrators.ContextObjectsDeletionMigrator do
|
|
defmodule State do
|
|
use Pleroma.Migrators.Support.BaseMigratorState
|
|
|
|
@impl Pleroma.Migrators.Support.BaseMigratorState
|
|
defdelegate data_migration(), to: Pleroma.DataMigration, as: :delete_context_objects
|
|
end
|
|
|
|
use Pleroma.Migrators.Support.BaseMigrator
|
|
|
|
alias Pleroma.Migrators.Support.BaseMigrator
|
|
alias Pleroma.Object
|
|
|
|
@doc "This migration removes objects created exclusively for contexts, containing only an `id` field."
|
|
|
|
@impl BaseMigrator
|
|
def feature_config_path, do: [:features, :delete_context_objects]
|
|
|
|
@impl BaseMigrator
|
|
def fault_rate_allowance, do: Config.get([:delete_context_objects, :fault_rate_allowance], 0)
|
|
|
|
@impl BaseMigrator
|
|
def perform do
|
|
data_migration_id = data_migration_id()
|
|
max_processed_id = get_stat(:max_processed_id, 0)
|
|
|
|
Logger.info("Deleting context objects from `objects` (from oid: #{max_processed_id})...")
|
|
|
|
query()
|
|
|> where([object], object.id > ^max_processed_id)
|
|
|> Repo.chunk_stream(100, :batches, timeout: :infinity)
|
|
|> Stream.each(fn objects ->
|
|
object_ids = Enum.map(objects, & &1.id)
|
|
|
|
results = Enum.map(object_ids, &delete_context_object(&1))
|
|
|
|
failed_ids =
|
|
results
|
|
|> Enum.filter(&(elem(&1, 0) == :error))
|
|
|> Enum.map(&elem(&1, 1))
|
|
|
|
chunk_affected_count =
|
|
results
|
|
|> Enum.filter(&(elem(&1, 0) == :ok))
|
|
|> length()
|
|
|
|
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 data_migration_id = $1 AND record_id = ANY($2)",
|
|
[data_migration_id, object_ids -- failed_ids]
|
|
)
|
|
|
|
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)
|
|
put_stat(:records_per_second, records_per_second())
|
|
persist_state()
|
|
|
|
# A quick and dirty approach to controlling the load this background migration imposes
|
|
sleep_interval = Config.get([:delete_context_objects, :sleep_interval_ms], 0)
|
|
Process.sleep(sleep_interval)
|
|
end)
|
|
|> Stream.run()
|
|
end
|
|
|
|
@impl BaseMigrator
|
|
def query do
|
|
# Context objects have no activity type, and only one field, `id`.
|
|
# Only those context objects are without types.
|
|
from(
|
|
object in Object,
|
|
where: fragment("(?)->'type' IS NULL", object.data),
|
|
select: %{
|
|
id: object.id
|
|
}
|
|
)
|
|
end
|
|
|
|
@spec delete_context_object(integer()) :: {:ok | :error, integer()}
|
|
defp delete_context_object(id) do
|
|
result =
|
|
%Object{id: id}
|
|
|> Repo.delete()
|
|
|> elem(0)
|
|
|
|
{result, id}
|
|
end
|
|
|
|
@impl BaseMigrator
|
|
def retry_failed do
|
|
data_migration_id = data_migration_id()
|
|
|
|
failed_objects_query()
|
|
|> Repo.chunk_stream(100, :one)
|
|
|> Stream.each(fn object ->
|
|
with {res, _} when res != :error <- delete_context_object(object.id) do
|
|
_ =
|
|
Repo.query(
|
|
"DELETE FROM data_migration_failed_ids " <>
|
|
"WHERE data_migration_id = $1 AND record_id = $2",
|
|
[data_migration_id, object.id]
|
|
)
|
|
end
|
|
end)
|
|
|> Stream.run()
|
|
|
|
put_stat(:failed_count, failures_count())
|
|
persist_state()
|
|
|
|
force_continue()
|
|
end
|
|
|
|
defp 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
|
|
end
|