chore: fix dialyzer issue

lib/aggregate.ex

@@ -1445,8 +1445,9 @@ defmodule AshPostgres.Aggregate do
   defp single_path?(resource, [relationship | rest]) do
     relationship = Ash.Resource.Info.relationship(resource, relationship)
 
-    (relationship.type == :belongs_to ||
-       has_one_with_identity?(relationship)) &&
+    !Map.get(relationship, :from_many?) &&
+      (relationship.type == :belongs_to ||
+         has_one_with_identity?(relationship)) &&
       single_path?(relationship.destination, rest)
   end
 

priv/resource_snapshots/test_repo/extensions.json

@@ -0,0 +1,10 @@
+{
+  "installed": [
+    "ash-functions",
+    "uuid-ossp",
+    "pg_trgm",
+    "citext",
+    "demo-functions_v1"
+  ],
+  "ash_functions_version": 3
+}

priv/test_repo/migrations/20240229050455_install_5_extensions.exs

@@ -0,0 +1,120 @@
+defmodule AshPostgres.TestRepo.Migrations.Install5Extensions do
+  @moduledoc """
+  Installs any extensions that are mentioned in the repo's `installed_extensions/0` callback
+
+  This file was autogenerated with `mix ash_postgres.generate_migrations`
+  """
+
+  use Ecto.Migration
+
+  def up do
+    execute("""
+    CREATE OR REPLACE FUNCTION ash_elixir_or(left BOOLEAN, in right ANYCOMPATIBLE, out f1 ANYCOMPATIBLE)
+    AS $$ SELECT COALESCE(NULLIF($1, FALSE), $2) $$
+    LANGUAGE SQL
+    IMMUTABLE;
+    """)
+
+    execute("""
+    CREATE OR REPLACE FUNCTION ash_elixir_or(left ANYCOMPATIBLE, in right ANYCOMPATIBLE, out f1 ANYCOMPATIBLE)
+    AS $$ SELECT COALESCE($1, $2) $$
+    LANGUAGE SQL
+    IMMUTABLE;
+    """)
+
+    execute("""
+    CREATE OR REPLACE FUNCTION ash_elixir_and(left BOOLEAN, in right ANYCOMPATIBLE, out f1 ANYCOMPATIBLE) AS $$
+      SELECT CASE
+        WHEN $1 IS TRUE THEN $2
+        ELSE $1
+      END $$
+    LANGUAGE SQL
+    IMMUTABLE;
+    """)
+
+    execute("""
+    CREATE OR REPLACE FUNCTION ash_elixir_and(left ANYCOMPATIBLE, in right ANYCOMPATIBLE, out f1 ANYCOMPATIBLE) AS $$
+      SELECT CASE
+        WHEN $1 IS NOT NULL THEN $2
+        ELSE $1
+      END $$
+    LANGUAGE SQL
+    IMMUTABLE;
+    """)
+
+    execute("""
+    CREATE OR REPLACE FUNCTION ash_trim_whitespace(arr text[])
+    RETURNS text[] AS $$
+    DECLARE
+        start_index INT = 1;
+        end_index INT = array_length(arr, 1);
+    BEGIN
+        WHILE start_index <= end_index AND arr[start_index] = '' LOOP
+            start_index := start_index + 1;
+        END LOOP;
+
+        WHILE end_index >= start_index AND arr[end_index] = '' LOOP
+            end_index := end_index - 1;
+        END LOOP;
+
+        IF start_index > end_index THEN
+            RETURN ARRAY[]::text[];
+        ELSE
+            RETURN arr[start_index : end_index];
+        END IF;
+    END; $$
+    LANGUAGE plpgsql
+    IMMUTABLE;
+    """)
+
+    execute("""
+    CREATE OR REPLACE FUNCTION ash_raise_error(json_data jsonb)
+    RETURNS BOOLEAN AS $$
+    BEGIN
+        -- Raise an error with the provided JSON data.
+        -- The JSON object is converted to text for inclusion in the error message.
+        RAISE EXCEPTION 'ash_error: %', json_data::text;
+        RETURN NULL;
+    END;
+    $$ LANGUAGE plpgsql;
+    """)
+
+    execute("""
+    CREATE OR REPLACE FUNCTION ash_raise_error(json_data jsonb, type_signal ANYCOMPATIBLE)
+    RETURNS ANYCOMPATIBLE AS $$
+    BEGIN
+        -- Raise an error with the provided JSON data.
+        -- The JSON object is converted to text for inclusion in the error message.
+        RAISE EXCEPTION 'ash_error: %', json_data::text;
+        RETURN NULL;
+    END;
+    $$ LANGUAGE plpgsql;
+    """)
+
+    execute("CREATE EXTENSION IF NOT EXISTS \"uuid-ossp\"")
+    execute("CREATE EXTENSION IF NOT EXISTS \"pg_trgm\"")
+    execute("CREATE EXTENSION IF NOT EXISTS \"citext\"")
+
+    execute("""
+    CREATE OR REPLACE FUNCTION ash_demo_functions()
+    RETURNS boolean AS $$ SELECT FALSE $$
+    LANGUAGE SQL
+    IMMUTABLE;
+    """)
+  end
+
+  def down do
+    # Uncomment this if you actually want to uninstall the extensions
+    # when this migration is rolled back:
+    execute(
+      "DROP FUNCTION IF EXISTS ash_raise_error(jsonb), ash_raise_error(jsonb, ANYCOMPATIBLE), ash_elixir_and(BOOLEAN, ANYCOMPATIBLE), ash_elixir_and(ANYCOMPATIBLE, ANYCOMPATIBLE), ash_elixir_or(ANYCOMPATIBLE, ANYCOMPATIBLE), ash_elixir_or(BOOLEAN, ANYCOMPATIBLE) ash_trim_whitespace(text[])"
+    )
+
+    # execute("DROP EXTENSION IF EXISTS \"uuid-ossp\"")
+    # execute("DROP EXTENSION IF EXISTS \"pg_trgm\"")
+    # execute("DROP EXTENSION IF EXISTS \"citext\"")
+    execute("""
+    DROP FUNCTION IF EXISTS ash_demo_functions()
+    """)
+  end
+end

test_snapshot_path/test_repo/extensions.json

@@ -0,0 +1,10 @@
+{
+  "installed": [
+    "ash-functions",
+    "uuid-ossp",
+    "pg_trgm",
+    "citext",
+    "demo-functions_v1"
+  ],
+  "ash_functions_version": 3
+}