refactor: add __eq__ on Table

piccolo/table.py

@@ -851,6 +851,11 @@ def __repr__(self) -> str:
         )
         return f"<{self.__class__.__name__}: {pk}>"
 
+    def __eq__(self, other) -> bool:
+        return isinstance(other, self.__class__) and getattr(
+            self, self._meta.primary_key._meta.name, None
+        ) == getattr(other, other._meta.primary_key._meta.name, None)
+
     ###########################################################################
     # Classmethods
 

tests/table/instance/test_instance_equality.py

@@ -0,0 +1,31 @@
+from piccolo.testing.test_case import AsyncTableTest
+from tests.example_apps.music.tables import Band, Manager
+
+
+class TestInstanceEquality(AsyncTableTest):
+    tables = [Manager, Band]
+
+    async def asyncSetUp(self):
+        await super().asyncSetUp()
+
+        self.manager = Manager(name="Guido")
+        await self.manager.save()
+
+        self.band = Band(
+            name="Pythonistas", manager=self.manager.id, popularity=100
+        )
+        await self.band.save()
+
+    async def test_instance_equality(self) -> None:
+        """
+        Make sure for instance equailty.
+        """
+        band_pk = await self.band.objects().first()
+        band = await self.band.objects(Band.manager).get(
+            (Band._meta.primary_key == band_pk.id)
+        )
+        manager_pk = await self.manager.objects().first()
+        manager = await self.manager.objects().get(
+            Manager._meta.primary_key == manager_pk.id
+        )
+        self.assertTrue(band.manager == manager)