test: add tests for fix in ash_sql

Author: zachdaniel

test/aggregate_test.exs

@@ -65,6 +65,35 @@ defmodule AshSql.AggregateTest do
     assert read_post.count_of_comments == 1
   end
 
+  test "nested filters on aggregates works" do
+    org =
+      Organization
+      |> Ash.Changeset.for_create(:create, %{name: "match"})
+      |> Ash.create!()
+
+    post =
+      Post
+      |> Ash.Changeset.for_create(:create, %{title: "match"})
+      |> Ash.Changeset.manage_relationship(:organization, org, type: :append_and_remove)
+      |> Ash.create!()
+
+    post2 =
+      Post
+      |> Ash.Changeset.for_create(:create, %{title: "match"})
+      |> Ash.create!()
+
+    Comment
+    |> Ash.Changeset.for_create(:create, %{title: "match"})
+    |> Ash.Changeset.manage_relationship(:post, post2, type: :append_and_remove)
+    |> Ash.create!()
+
+    assert [%{count_of_comments_matching_org_name: 1}] =
+             Post
+             |> Ash.Query.load(:count_of_comments_matching_org_name)
+             |> Ash.Query.filter(id == ^post.id)
+             |> Ash.read!()
+  end
+
   describe "Context Multitenancy" do
     alias AshPostgres.MultitenancyTest.{Org, Post, User}
 

test/support/resources/post.ex

@@ -850,6 +850,13 @@ defmodule AshPostgres.Test.Post do
       filter(title: "match")
     end
 
+    count :count_of_comments_matching_org_name, [
+      :posts_with_matching_title,
+      :comments
+    ] do
+      filter(expr(parent(organization.name) == title))
+    end
+
     count(:count_of_comments_containing_title, :comments_containing_title)
 
     first :first_comment, :comments, :title do