Commit ef564883 authored by kaniini's avatar kaniini

mix: add task to compact the database

parent 5d753e1c
defmodule Mix.Tasks.CompactDatabase do
@moduledoc """
Compact the database by flattening the object graph.
"""
require Logger
use Mix.Task
import Mix.Ecto
import Ecto.Query
alias Pleroma.{Repo, Object, Activity}
defp maybe_compact(%Activity{data: %{"object" => %{"id" => object_id}}} = activity) do
data =
activity.data
|> Map.put("object", object_id)
{:ok, activity} =
Activity.change(activity, %{data: data})
|> Repo.update()
{:ok, activity}
end
defp maybe_compact(%Activity{} = activity), do: {:ok, activity}
defp activity_query(min_id, max_id) do
from(
a in Activity,
where: fragment("?->>'type' = 'Create'", a.data),
where: a.id >= ^min_id,
where: a.id < ^max_id
)
end
def run(args) do
Application.ensure_all_started(:pleroma)
max = Repo.aggregate(Activity, :max, :id)
Logger.info("Considering #{max} activities")
chunks = 0..(round(max / 100))
Enum.each(chunks, fn (i) ->
min = i * 100
max = min + 100
activity_query(min, max)
|> Repo.all()
|> Enum.each(&maybe_compact/1)
IO.write(".")
end)
Logger.info("Finished.")
end
end
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