Fix ambiguous column name when grouping with joins

tests/test_group_by.py

@@ -8,10 +8,12 @@ async def asyncSetUp(self) -> None:
         await super(TestGroupBy, self).asyncSetUp()
         self.a1 = await Author.create(name="author1")
         self.a2 = await Author.create(name="author2")
-        for i in range(10):
-            await Book.create(name=f"book{i}", author=self.a1, rating=i)
-        for i in range(5):
-            await Book.create(name=f"book{i}", author=self.a2, rating=i)
+        self.books1 = [
+            await Book.create(name=f"book{i}", author=self.a1, rating=i) for i in range(10)
+        ]
+        self.books2 = [
+            await Book.create(name=f"book{i}", author=self.a2, rating=i) for i in range(5)
+        ]
 
     async def test_count_group_by(self):
         ret = (
@@ -249,10 +251,69 @@ async def test_group_by_requiring_nested_joins(self):
         await team_second.events.add(event_second)
         await team_third.events.add(event_third)
 
-        res = (
+        ret = (
             await Tournament.annotate(avg=Avg("events__participants__alias"))
             .group_by("desc")
             .order_by("desc")
             .values("desc", "avg")
         )
-        self.assertEqual(res, [{"avg": 3, "desc": "d1"}, {"avg": 5, "desc": "d2"}])
+        self.assertEqual(ret, [{"avg": 3, "desc": "d1"}, {"avg": 5, "desc": "d2"}])
+
+    async def test_group_by_ambigious_column(self):
+        tournament_first = await Tournament.create(name="Tournament 1")
+        tournament_second = await Tournament.create(name="Tournament 2")
+
+        await Event.create(name="1", tournament=tournament_first)
+        await Event.create(name="2", tournament=tournament_first)
+        await Event.create(name="3", tournament=tournament_second)
+
+        base_query = (
+            Tournament.annotate(event_count=Count("events")).group_by("name").order_by("name")
+        )
+        ret = await base_query.values("name", "event_count")
+        self.assertEqual(
+            ret,
+            [
+                {"event_count": 2, "name": "Tournament 1"},
+                {"event_count": 1, "name": "Tournament 2"},
+            ],
+        )
+
+        ret = await base_query.values_list("name", "event_count")
+        self.assertEqual(
+            ret,
+            [("Tournament 1", 2), ("Tournament 2", 1)],
+        )
+
+    async def test_group_by_nested_column(self):
+        tournament_first = await Tournament.create(name="A")
+        tournament_second = await Tournament.create(name="B")
+
+        await Event.create(name="1", tournament=tournament_first)
+        await Event.create(name="2", tournament=tournament_first)
+        await Event.create(name="3", tournament=tournament_first)
+        await Event.create(name="4", tournament=tournament_second)
+
+        base_query = (
+            Event.annotate(count=Count("event_id"))
+            .group_by("tournament__name")
+            .order_by("-tournament__name")
+        )
+        ret = await base_query.values("tournament__name", "count")
+        self.assertEqual(
+            ret,
+            [
+                {"count": 1, "tournament__name": "B"},
+                {"count": 3, "tournament__name": "A"},
+            ],
+        )
+
+        ret = await base_query.values_list("tournament__name", "count")
+        self.assertEqual(
+            ret,
+            [("B", 1), ("A", 3)],
+        )
+
+    async def test_group_by_id_with_nested_filter(self):
+        ret = await Book.filter(author__name="author1").group_by("id").values_list("id")
+        self.assertEqual(set(ret), {(book.id,) for book in self.books1})

tests/test_order_by.py

@@ -36,6 +36,17 @@ async def test_order_by_related(self):
         tournaments = await Tournament.all().order_by("events__name")
         self.assertEqual([t.name for t in tournaments], ["2", "1"])
 
+    async def test_order_by_ambigious_field_name(self):
+        tournament_first = await Tournament.create(name="Tournament 1", desc="d1")
+        tournament_second = await Tournament.create(name="Tournament 2", desc="d2")
+
+        event_third = await Event.create(name="3", tournament=tournament_second)
+        event_second = await Event.create(name="2", tournament=tournament_first)
+        event_first = await Event.create(name="1", tournament=tournament_first)
+
+        res = await Event.all().order_by("tournament__name", "name")
+        self.assertEqual(res, [event_first, event_second, event_third])
+
     async def test_order_by_related_reversed(self):
         tournament_first = await Tournament.create(name="1")
         tournament_second = await Tournament.create(name="2")

tests/test_source_field.py

@@ -279,6 +279,21 @@ async def test_filter_with_field_f_annotation(self):
         )
         self.assertEqual(obj, ret_obj)
 
+    async def test_group_by(self):
+        await self.model.create(chars="aaa", blip="a")
+        await self.model.create(chars="aaa", blip="b")
+        await self.model.create(chars="bbb")
+
+        objs = (
+            await self.model.annotate(chars_count=Count("chars"))
+            .group_by("chars")
+            .order_by("chars")
+            .values("chars", "chars_count")
+        )
+        self.assertEqual(
+            objs, [{"chars": "aaa", "chars_count": 2}, {"chars": "bbb", "chars_count": 1}]
+        )
+
 
 class SourceFieldTests(StraightFieldTests):
     def setUp(self) -> None:

tortoise/queryset.py

@@ -1523,7 +1523,9 @@ def _resolve_group_bys(self, *field_names: str):
                 field=field,
                 forwarded_fields=forwarded_fields,
             )
-            field = related_table[related_db_field].as_(field_name)
+            field = related_table[related_db_field].as_(
+                f"{related_table.get_table_name()}__{field_name}"
+            )
             group_bys.append(field)
         return group_bys