X-Git-Url: https://git.squeep.com/?a=blobdiff_plain;f=lib%2Fpleroma%2Frepo.ex;h=f317e4d582e6cea6fee974190e30015797cffb8a;hb=d833d2c1fd3861caa055c2d5c87d549b8f246d30;hp=4af1bde566b4df98e299e87fbfb61a4b8613a426;hpb=19a19bdd8145bd91b38d9c6571d2e7c597754055;p=akkoma
diff --git a/lib/pleroma/repo.ex b/lib/pleroma/repo.ex
index 4af1bde56..f317e4d58 100644
--- a/lib/pleroma/repo.ex
+++ b/lib/pleroma/repo.ex
@@ -1,5 +1,5 @@
# Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 Pleroma Authors
+# Copyright © 2017-2020 Pleroma Authors
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Repo do
@@ -8,6 +8,11 @@ defmodule Pleroma.Repo do
adapter: Ecto.Adapters.Postgres,
migration_timestamps: [type: :naive_datetime_usec]
+ import Ecto.Query
+ require Logger
+
+ defmodule Instrumenter, do: use(Prometheus.EctoInstrumenter)
+
@doc """
Dynamically loads the repository url from the
DATABASE_URL environment variable.
@@ -15,4 +20,59 @@ defmodule Pleroma.Repo do
def init(_, opts) do
{:ok, Keyword.put(opts, :url, System.get_env("DATABASE_URL"))}
end
+
+ @doc "find resource based on prepared query"
+ @spec find_resource(Ecto.Query.t()) :: {:ok, struct()} | {:error, :not_found}
+ def find_resource(%Ecto.Query{} = query) do
+ case __MODULE__.one(query) do
+ nil -> {:error, :not_found}
+ resource -> {:ok, resource}
+ end
+ end
+
+ def find_resource(_query), do: {:error, :not_found}
+
+ @doc """
+ Gets association from cache or loads if need
+
+ ## Examples
+
+ iex> Repo.get_assoc(token, :user)
+ %User{}
+
+ """
+ @spec get_assoc(struct(), atom()) :: {:ok, struct()} | {:error, :not_found}
+ def get_assoc(resource, association) do
+ case __MODULE__.preload(resource, association) do
+ %{^association => assoc} when not is_nil(assoc) -> {:ok, assoc}
+ _ -> {:error, :not_found}
+ end
+ end
+
+ def chunk_stream(query, chunk_size) do
+ # We don't actually need start and end funcitons of resource streaming,
+ # but it seems to be the only way to not fetch records one-by-one and
+ # have individual records be the elements of the stream, instead of
+ # lists of records
+ Stream.resource(
+ fn -> 0 end,
+ fn
+ last_id ->
+ query
+ |> order_by(asc: :id)
+ |> where([r], r.id > ^last_id)
+ |> limit(^chunk_size)
+ |> all()
+ |> case do
+ [] ->
+ {:halt, last_id}
+
+ records ->
+ last_id = List.last(records).id
+ {records, last_id}
+ end
+ end,
+ fn _ -> :ok end
+ )
+ end
end