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Object: remove context_id field

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30 to 70% of the objects in the object table are simple JSON objects
containing a single field, 'id', being the context's ID. The reason for
the creation of an object per context seems to be an old relic from the
StatusNet era, and has only been used nowadays as an helper for threads
in Pleroma-FE via the `pleroma.conversation_id` field in status views.
An object per context was created, and its numerical ID (table column)
was used and stored as 'context_id' in the object and activity along
with the full 'context' URI/string.

This commit removes this field and stops creation of objects for each
context, which will also allow incoming activities to use activity IDs
as contexts, something which was not possible before, or would have been
very broken under most circumstances.

The `pleroma.conversation_id` field has been reimplemented in a way to
maintain backwards-compatibility by calculating a CRC32 of the full
context URI/string in the object, instead of relying on the row ID for
the created context object.
This commit is contained in:
Hélène 2022-08-06 03:24:31 +02:00
commit f3e061c964
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14 changed files with 9 additions and 102 deletions
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23
lib/pleroma/web/activity_pub/utils.ex
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@ -154,22 +154,7 @@ defmodule Pleroma.Web.ActivityPub.Utils do
Notification.get_notified_from_activity(%Activity{data: object}, false)
end
def create_context(context) do
context = context || generate_id("contexts")
# Ecto has problems accessing the constraint inside the jsonb,
# so we explicitly check for the existed object before insert
object = Object.get_cached_by_ap_id(context)
with true <- is_nil(object),
changeset <- Object.context_mapping(context),
{:ok, inserted_object} <- Repo.insert(changeset) do
inserted_object
else
_ ->
object
end
end
def maybe_create_context(context), do: context || generate_id("contexts")
@doc """
Enqueues an activity for federation if it's local
@ -201,18 +186,16 @@ defmodule Pleroma.Web.ActivityPub.Utils do
|> Map.put_new("id", "pleroma:fakeid")
|> Map.put_new_lazy("published", &make_date/0)
|> Map.put_new("context", "pleroma:fakecontext")
|> Map.put_new("context_id", -1)
|> lazy_put_object_defaults(true)
end
def lazy_put_activity_defaults(map, _fake?) do
%{data: %{"id" => context}, id: context_id} = create_context(map["context"])
context = maybe_create_context(map["context"])
map
|> Map.put_new_lazy("id", &generate_activity_id/0)
|> Map.put_new_lazy("published", &make_date/0)
|> Map.put_new("context", context)
|> Map.put_new("context_id", context_id)
|> lazy_put_object_defaults(false)
end
@ -226,7 +209,6 @@ defmodule Pleroma.Web.ActivityPub.Utils do
|> Map.put_new("id", "pleroma:fake_object_id")
|> Map.put_new_lazy("published", &make_date/0)
|> Map.put_new("context", activity["context"])
|> Map.put_new("context_id", activity["context_id"])
|> Map.put_new("fake", true)
%{activity | "object" => object}
@ -239,7 +221,6 @@ defmodule Pleroma.Web.ActivityPub.Utils do
|> Map.put_new_lazy("id", &generate_object_id/0)
|> Map.put_new_lazy("published", &make_date/0)
|> Map.put_new("context", activity["context"])
|> Map.put_new("context_id", activity["context_id"])
%{activity | "object" => object}
end