Remove empty keys from Layout Resource Links

lib/beacon/live_admin/live/layout_editor_live/resource_links.ex

@@ -185,8 +185,22 @@ defmodule Beacon.LiveAdmin.LayoutEditorLive.ResourceLinks do
 
     case Map.fetch(params, field) do
       {:ok, map} ->
-        list = Enum.sort_by(map, fn {key, _value} -> String.to_integer(key) end)
-        Map.put(params, field, Keyword.values(list))
+        list =
+          Enum.sort_by(map, &String.to_integer(elem(&1, 0)))
+          |> Enum.map(fn {_position, map} ->
+            Enum.reduce(map, [], fn {key, value}, acc ->
+              case value do
+                nil -> acc
+                "" -> acc
+                # only add non-empty values to the list
+                _ -> [{key, value} | acc]
+              end
+            end)
+          end)
+          |> List.flatten()
+          |> Enum.into(%{})
+
+        Map.put(params, field, list)
 
       :error ->
         params

test/beacon/live_admin/live/layout_editor_live/edit_test.exs

@@ -7,7 +7,21 @@
       rpc(node1(), Beacon.Repo, :delete_all, [Beacon.Content.Layout, [log: false]])
     end)
 
-    [layout: layout_fixture()]
+    [
+      layout: layout_fixture(),
+      resource_links_layout:
+        layout_fixture(node1(), %{
+          resource_links: [
+            %{
+              "crossorigin" => "",
+              "href" => "https://example.com",
+              "rel" => "preload",
+              "type" => "",
+              "as" => ""
+            }
+          ]
+        })
+    ]
   end
 
   test "save changes", %{conn: conn, layout: layout} do
@@ -36,4 +50,30 @@
 
     assert html =~ "Published"
   end
+
+  test "simple remove nils from resource_links", %{
+    conn: conn,
+    resource_links_layout: resource_links_layout
+  } do
+    map =
+      Beacon.LiveAdmin.LayoutEditorLive.ResourceLinks.coerce_resource_link_params(%{
+        "resource_links" => %{
+          "0" => %{
+            "crossorigin" => nil,
+            "href" => "https://example.com",
+            "rel" => "preload",
+            "type" => "foo",
+            "as" => ""
+          }
+        }
+      })
+
+    assert map == %{
+             "resource_links" => %{
+               "href" => "https://example.com",
+               "rel" => "preload",
+               "type" => "foo"
+             }
+           }
+  end
 end