pleroma.database fill_old_hashtags: Add month_limit argument

docs/administration/CLI_tasks/database.md

@@ -93,12 +93,14 @@ Can be safely re-run
 
 ## Fill hashtags for old objects
 
+Migrate hashags fields for old objects, from now to `months_limit` months.
+
 ```sh tab="OTP"
-./bin/pleroma_ctl database fill_old_hashtags
+./bin/pleroma_ctl database fill_old_hashtags <months_limit>
 ```
 
 ```sh tab="From Source"
-mix pleroma.database fill_old_hashtags
+mix pleroma.database fill_old_hashtags <months_limit>
 ```
 
 ## Vacuum the database

lib/mix/tasks/pleroma/database.ex

@@ -128,17 +128,24 @@ defmodule Mix.Tasks.Pleroma.Database do
     |> Stream.run()
   end
 
-  def run(["fill_old_hashtags"]) do
+  def run(["fill_old_hashtags", month_limit]) do
     import Ecto.Query
 
     start_pleroma()
 
+    month_limit = String.to_integer(month_limit)
+
+    if month_limit < 1 do
+      shell_error("Invalid `month_limit` argument, needs to be greater than 1")
+    else
+      time_limit = DateTime.utc_now() |> Timex.shift(months: -month_limit)
+
       from(
         o in Object,
         where: fragment("(?)->>'hashtags' is null", o.data),
         where: fragment("(?)->>'tag' != '[]'", o.data),
-      select: %{id: o.id, tag: fragment("(?)->>'tag'", o.data)},
+        where: o.inserted_at < ^time_limit,
-      order_by: [:desc, o.id]
+        select: %{id: o.id, tag: fragment("(?)->>'tag'", o.data)}
       )
       |> Pleroma.Repo.chunk_stream(200, :batches)
       |> Stream.each(fn objects ->
@@ -170,6 +177,7 @@ defmodule Mix.Tasks.Pleroma.Database do
       end)
       |> Stream.run()
     end
+  end
 
   def run(["vacuum", args]) do
     start_pleroma()