Merge branch 'feature/845-improve-status-deletion' into 'develop'

Improve status deletion

Closes #845

See merge request pleroma/pleroma!1104

CHANGELOG.md

@@ -66,6 +66,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Deactivated users being able to request an access token
 - Limit on request body in rich media/relme parsers being ignored resulting in a possible memory leak
 - proper Twitter Card generation instead of a dummy
+- Deletions failing for users with a large number of posts
 - NodeInfo: Include admins in `staffAccounts`
 - ActivityPub: Crashing when requesting empty local user's outbox
 - Federation: Handling of objects without `summary` property

config/config.exs

@@ -232,7 +232,8 @@ config :pleroma, :instance,
   welcome_message: nil,
   max_report_comment_size: 1000,
   safe_dm_mentions: false,
-  healthcheck: false
+  healthcheck: false,
+  repo_batch_size: 500
 
 config :pleroma, :markup,
   # XXX - unfortunately, inline images must be enabled by default right now, because
@@ -416,7 +417,8 @@ config :pleroma_job_queue, :queues,
   web_push: 50,
   mailer: 10,
   transmogrifier: 20,
-  scheduled_activities: 10
+  scheduled_activities: 10,
+  background: 5
 
 config :pleroma, :fetch_initial_posts,
   enabled: false,

docs/config.md

@@ -104,6 +104,7 @@ config :pleroma, Pleroma.Emails.Mailer,
 * `max_report_comment_size`: The maximum size of the report comment (Default: `1000`)
 * `safe_dm_mentions`: If set to true, only mentions at the beginning of a post will be used to address people in direct messages. This is to prevent accidental mentioning of people when talking about them (e.g. "@friend hey i really don't like @enemy"). (Default: `false`)
 * `healthcheck`: if set to true, system data will be shown on ``/api/pleroma/healthcheck``.
+* `repo_batch_size`: Repo batch size. The number of loaded rows from the database to the memory for processing chunks. E.g. deleting user statuses.
 
 ## :logger
 * `backends`: `:console` is used to send logs to stdout, `{ExSyslogger, :ex_syslogger}` to log to syslog, and `Quack.Logger` to log to Slack

lib/mix/tasks/pleroma/user.ex

@@ -163,7 +163,7 @@ defmodule Mix.Tasks.Pleroma.User do
     Common.start_pleroma()
 
     with %User{local: true} = user <- User.get_cached_by_nickname(nickname) do
-      User.delete(user)
+      User.perform(:delete, user)
       Mix.shell().info("User #{nickname} deleted.")
     else
       _ ->
@@ -380,7 +380,7 @@ defmodule Mix.Tasks.Pleroma.User do
     Common.start_pleroma()
 
     with %User{local: true} = user <- User.get_cached_by_nickname(nickname) do
-      User.delete_user_activities(user)
+      {:ok, _} = User.delete_user_activities(user)
       Mix.shell().info("User #{nickname} statuses deleted.")
     else
       _ ->

lib/pleroma/activity.ex

@@ -14,6 +14,8 @@ defmodule Pleroma.Activity do
   import Ecto.Query
 
   @type t :: %__MODULE__{}
+  @type actor :: String.t()
+
   @primary_key {:id, Pleroma.FlakeId, autogenerate: true}
 
   # https://github.com/tootsuite/mastodon/blob/master/app/models/notification.rb#L19
@@ -260,4 +262,9 @@ defmodule Pleroma.Activity do
     |> where([s], s.actor == ^actor)
     |> Repo.all()
   end
+
+  @spec query_by_actor(actor()) :: Ecto.Query.t()
+  def query_by_actor(actor) do
+    from(a in Activity, where: a.actor == ^actor)
+  end
 end

lib/pleroma/user.ex

@@ -1164,7 +1164,12 @@ defmodule Pleroma.User do
     |> update_and_set_cache()
   end
 
-  def delete(%User{} = user) do
+  @spec delete(User.t()) :: :ok
+  def delete(%User{} = user),
+    do: PleromaJobQueue.enqueue(:background, __MODULE__, [:delete, user])
+
+  @spec perform(atom(), User.t()) :: {:ok, User.t()}
+  def perform(:delete, %User{} = user) do
     {:ok, user} = User.deactivate(user)
 
     # Remove all relationships
@@ -1180,22 +1185,23 @@ defmodule Pleroma.User do
   end
 
   def delete_user_activities(%User{ap_id: ap_id} = user) do
-    Activity
-    |> where(actor: ^ap_id)
+    stream =
+      ap_id
+      |> Activity.query_by_actor()
       |> Activity.with_preloaded_object()
-    |> Repo.all()
-    |> Enum.each(fn
-      %{data: %{"type" => "Create"}} = activity ->
-        activity |> Object.normalize() |> ActivityPub.delete()
+      |> Repo.stream()
 
-      # TODO: Do something with likes, follows, repeats.
-      _ ->
-        "Doing nothing"
-    end)
+    Repo.transaction(fn -> Enum.each(stream, &delete_activity(&1)) end, timeout: :infinity)
 
     {:ok, user}
   end
 
+  defp delete_activity(%{data: %{"type" => "Create"}} = activity) do
+    Object.normalize(activity) |> ActivityPub.delete()
+  end
+
+  defp delete_activity(_activity), do: "Doing nothing"
+
   def html_filter_policy(%User{info: %{no_rich_text: true}}) do
     Pleroma.HTML.Scrubber.TwitterText
   end

lib/pleroma/user_invite_token.ex

@@ -24,7 +24,7 @@ defmodule Pleroma.UserInviteToken do
     timestamps()
   end
 
-  @spec create_invite(map()) :: UserInviteToken.t()
+  @spec create_invite(map()) :: {:ok, UserInviteToken.t()}
   def create_invite(params \\ %{}) do
     %UserInviteToken{}
     |> cast(params, [:max_use, :expires_at])

lib/pleroma/web/twitter_api/controllers/util_controller.ex

@@ -352,7 +352,7 @@ defmodule Pleroma.Web.TwitterAPI.UtilController do
   def delete_account(%{assigns: %{user: user}} = conn, params) do
     case CommonAPI.Utils.confirm_current_password(user, params["password"]) do
       {:ok, user} ->
-        Task.start(fn -> User.delete(user) end)
+        User.delete(user)
         json(conn, %{status: "success"})
 
       {:error, msg} ->

test/user_test.exs

@@ -829,10 +829,12 @@ defmodule Pleroma.UserTest do
     user = insert(:user)
 
     {:ok, activity} = CommonAPI.post(user, %{"status" => "2hu"})
-    {:ok, _} = User.delete_user_activities(user)
 
+    Ecto.Adapters.SQL.Sandbox.unboxed_run(Repo, fn ->
+      {:ok, _} = User.delete_user_activities(user)
       # TODO: Remove favorites, repeats, delete activities.
       refute Activity.get_by_id(activity.id)
+    end)
   end
 
   test ".delete deactivates a user, all follow relationships and all create activities" do