Allow `null` in `room_types` for `POST /publicRooms` endpoints (#1564)

Signed-off-by: Kévin Commaille <zecakeh@tedomum.fr>

changelogs/client_server/newsfragments/1564.clarification

@@ -0,0 +1 @@
+Allow `null` in `room_types` in `POST /publicRooms` endpoints schemas.

changelogs/server_server/newsfragments/1564.clarification

@@ -0,0 +1 @@
+Allow `null` in `room_types` in `POST /publicRooms` endpoints schemas.

data/api/client-server/list_public_rooms.yaml

@@ -214,7 +214,7 @@ paths:
                       type: array
                       x-addedInMatrixVersion: "1.4"
                       items:
-                        type: string
+                        type: ["string", "null"]
                       description: |-
                         An optional list of [room types](/client-server-api/#types) to search
                         for. To include rooms without a room type, specify `null` within this

data/api/server-server/public_rooms.yaml

@@ -107,7 +107,7 @@ paths:
                       type: array
                       x-addedInMatrixVersion: "1.4"
                       items:
-                        type: string
+                        type: ["string", "null"]
                       description: |-
                         An optional list of [room types](/client-server-api/#types) to search
                         for. To include rooms without a room type, specify `null` within this

layouts/partials/openapi/render-object-table.html

@@ -102,11 +102,24 @@
             internal structure, handle this with a bit of recursion
         */}}
         {{ $type = delimit (slice "{string: " (partial "type-or-title" .additionalProperties) "}" ) "" }}
-    {{ else if and .oneOf (reflect.IsSlice .oneOf) }}
+    {{ else if reflect.IsSlice .type }}
         {{/* It's legal to specify an array of types. Join them together in that case */}}
 
         {{ $types := slice }}
 
+        {{ range .type }}
+            {{ $types = $types | append . }}
+        {{ end }}
+
+        {{ $type = delimit $types "|" }}
+    {{ else if and .oneOf (reflect.IsSlice .oneOf) }}
+        {{/*
+            This is like an array of types except some of the types probably have a schema.
+            Join them together too.
+        */}}
+
+        {{ $types := slice }}
+
         {{ range .oneOf }}
             {{ $types = $types | append .type }}
         {{ end }}