Merge branch 'fix/1787-mogrify-args' into 'develop'

[akkoma] / lib / pleroma / repo.ex

diff --git a/lib/pleroma/repo.ex b/lib/pleroma/repo.ex
index f57e088bc288f321c11c62868ea5b363d77a702b..6d85d70bc66c9ac6de1d0266c4937572402c2e95 100644 (file)
--- 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 <https://pleroma.social/>
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Repo do
@@ -8,6 +8,9 @@ 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
   end
@@ -47,4 +50,64 @@ defmodule Pleroma.Repo do
       _ -> {:error, :not_found}
     end
   end
+
+  def check_migrations_applied!() do
+    unless Pleroma.Config.get(
+             [:i_am_aware_this_may_cause_data_loss, :disable_migration_check],
+             false
+           ) do
+      Ecto.Migrator.with_repo(__MODULE__, fn repo ->
+        down_migrations =
+          Ecto.Migrator.migrations(repo)
+          |> Enum.reject(fn
+            {:up, _, _} -> true
+            {:down, _, _} -> false
+          end)
+
+        if length(down_migrations) > 0 do
+          down_migrations_text =
+            Enum.map(down_migrations, fn {:down, id, name} -> "- #{name} (#{id})\n" end)
+
+          Logger.error(
+            "The following migrations were not applied:\n#{down_migrations_text}If you want to start Pleroma anyway, set\nconfig :pleroma, :i_am_aware_this_may_cause_data_loss, disable_migration_check: true"
+          )
+
+          raise Pleroma.Repo.UnappliedMigrationsError
+        end
+      end)
+    else
+      :ok
+    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
+
+defmodule Pleroma.Repo.UnappliedMigrationsError do
+  defexception message: "Unapplied Migrations detected"
 end