chore: Add test for filtering on doubly-nested embedded resource fields

test/embeddable_resource_test.exs

@@ -23,6 +23,28 @@
              Ash.load!(post, :calc_returning_json)
   end
 
+  test "can filter on a doubly-nested embedded resource field" do
+    Author
+    |> Ash.Changeset.for_create(:create, %{
+      bio: %{address: %{city: "Sydney", country: "AU"}}
+    })
+    |> Ash.create!()
+
+    Author
+    |> Ash.Changeset.for_create(:create, %{
+      bio: %{address: %{city: "Melbourne", country: "AU"}}
+    })
+    |> Ash.create!()
+
+    results =
+      Author
+      |> Ash.Query.filter(bio[:address][:city] == "Sydney")
+      |> Ash.read!()
+
+    assert length(results) == 1
+    assert hd(results).bio.address.city == "Sydney"
+  end
+
   test "embeds with list attributes set to nil are loaded as nil" do
     author =
       Author

test/support/resources/bio.ex

@@ -22,5 +22,7 @@ defmodule AshPostgres.Test.Bio do
       allow_nil?(true)
       default(nil)
     end
+
+    attribute(:address, AshPostgres.Test.BioAddress, public?: true)
   end
 end

test/support/resources/bio_address.ex

@@ -0,0 +1,18 @@
+# SPDX-FileCopyrightText: 2019 ash_postgres contributors <https://github.com/ash-project/ash_postgres/graphs/contributors>
+#
+# SPDX-License-Identifier: MIT
+
+defmodule AshPostgres.Test.BioAddress do
+  @moduledoc false
+  use Ash.Resource, data_layer: :embedded
+
+  actions do
+    default_accept(:*)
+    defaults([:create, :read, :update, :destroy])
+  end
+
+  attributes do
+    attribute(:city, :string, public?: true)
+    attribute(:country, :string, public?: true)
+  end
+end