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-rw-r--r--lib/mix/tasks/pleroma/database.ex40
1 files changed, 40 insertions, 0 deletions
diff --git a/lib/mix/tasks/pleroma/database.ex b/lib/mix/tasks/pleroma/database.ex
index 2403ed581..57f73d12b 100644
--- a/lib/mix/tasks/pleroma/database.ex
+++ b/lib/mix/tasks/pleroma/database.ex
@@ -8,10 +8,13 @@ defmodule Mix.Tasks.Pleroma.Database do
alias Pleroma.Object
alias Pleroma.Repo
alias Pleroma.User
+
require Logger
require Pleroma.Constants
+
import Ecto.Query
import Mix.Pleroma
+
use Mix.Task
@shortdoc "A collection of database related tasks"
@@ -93,6 +96,15 @@ defmodule Mix.Tasks.Pleroma.Database do
)
|> Repo.delete_all(timeout: :infinity)
+ prune_hashtags_query = """
+ DELETE FROM hashtags AS ht
+ WHERE NOT EXISTS (
+ SELECT 1 FROM hashtags_objects hto
+ WHERE ht.id = hto.hashtag_id)
+ """
+
+ Repo.query(prune_hashtags_query)
+
if Keyword.get(options, :vacuum) do
Maintenance.vacuum("full")
end
@@ -214,4 +226,32 @@ defmodule Mix.Tasks.Pleroma.Database do
shell_info('Done.')
end
end
+
+ # Rolls back a specific migration (leaving subsequent migrations applied).
+ # WARNING: imposes a risk of unrecoverable data loss — proceed at your own responsibility.
+ # Based on https://stackoverflow.com/a/53825840
+ def run(["rollback", version]) do
+ prompt = "SEVERE WARNING: this operation may result in unrecoverable data loss. Continue?"
+
+ if shell_prompt(prompt, "n") in ~w(Yn Y y) do
+ {_, result, _} =
+ Ecto.Migrator.with_repo(Pleroma.Repo, fn repo ->
+ version = String.to_integer(version)
+ re = ~r/^#{version}_.*\.exs/
+ path = Ecto.Migrator.migrations_path(repo)
+
+ with {_, "" <> file} <- {:find, Enum.find(File.ls!(path), &String.match?(&1, re))},
+ {_, [{mod, _} | _]} <- {:compile, Code.compile_file(Path.join(path, file))},
+ {_, :ok} <- {:rollback, Ecto.Migrator.down(repo, version, mod)} do
+ {:ok, "Reversed migration: #{file}"}
+ else
+ {:find, _} -> {:error, "No migration found with version prefix: #{version}"}
+ {:compile, e} -> {:error, "Problem compiling migration module: #{inspect(e)}"}
+ {:rollback, e} -> {:error, "Problem reversing migration: #{inspect(e)}"}
+ end
+ end)
+
+ shell_info(inspect(result))
+ end
+ end
end