From 006b62fd12adadbf698419990ab13bf6f1e901b2 Mon Sep 17 00:00:00 2001
From: rinpatch <rinpatch@sdf.org>
Date: Tue, 29 Sep 2020 21:49:04 +0300
Subject: [PATCH] OpenAPI CastAndValidate: filter out empty params

Closes #2198
---
 CHANGELOG.md                                  | 5 +++++
 lib/pleroma/web/api_spec/cast_and_validate.ex | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 80fbc078d..983ddd628 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -37,6 +37,11 @@ switched to a new configuration mechanism, however it was not officially removed
 - Add documented-but-missing chat pagination.
 - Allow sending out emails again.
 
+## Unreleased (Patch)
+
+### Changed
+- API: Empty parameter values for integer parameters are now ignored in non-strict validaton mode.
+
 ## [2.1.2] - 2020-09-17
 
 ### Security
diff --git a/lib/pleroma/web/api_spec/cast_and_validate.ex b/lib/pleroma/web/api_spec/cast_and_validate.ex
index fbfc27d6f..6d1a7ebbc 100644
--- a/lib/pleroma/web/api_spec/cast_and_validate.ex
+++ b/lib/pleroma/web/api_spec/cast_and_validate.ex
@@ -115,6 +115,10 @@ defmodule Pleroma.Web.ApiSpec.CastAndValidate do
             %{reason: :unexpected_field, name: name, path: [name]}, params ->
               Map.delete(params, name)
 
+            # Filter out empty params
+            %{reason: :invalid_type, path: [name_atom], value: ""}, params ->
+              Map.delete(params, to_string(name_atom))
+
             %{reason: :invalid_enum, name: nil, path: path, value: value}, params ->
               path = path |> Enum.reverse() |> tl() |> Enum.reverse() |> list_items_to_string()
               update_in(params, path, &List.delete(&1, value))