def testMergeSingleComponent(self):

        assertEqual = self.assertEqual
        assertNotEqual = self.assertNotEqual
        assertTrue = self.assertTrue
        assertFalse = self.assertFalse

        db = current.db
        s3db = current.s3db
        deployment_settings = current.deployment_settings

        person1, person2 = self.get_records()

        dtable = s3db.pr_physical_description

        pd1 = Storage(pe_id=person1.pe_id,
                      blood_type="B+")
        pd1_id = dtable.insert(**pd1)
        pd1.update(id=pd1_id)
        s3db.update_super(dtable, pd1)

        pd2 = Storage(pe_id=person2.pe_id,
                      blood_type="B-")
        pd2_id = dtable.insert(**pd2)
        pd2.update(id=pd2_id)
        s3db.update_super(dtable, pd2)

        success = self.resource.merge(self.id1, self.id2,
                                      replace = ["physical_description.blood_type"])

        assertTrue(success)

        pd1 = db(dtable._id == pd1_id).select(limitby=(0, 1)).first()
        assertNotEqual(pd1, None)
        assertFalse(pd1.deleted)
        assertEqual(pd1.blood_type, "B-")
        assertEqual(pd1.pe_id, person1.pe_id)

        pd2 = db(dtable._id == pd2_id).select(limitby=(0, 1)).first()
        assertNotEqual(pd2, None)
        assertTrue(pd2.deleted)
        assertEqual(str(pd2.deleted_rb), str(pd1.id))

    # -------------------------------------------------------------------------
Find the correct deltas for the expression.
dataset/ETHPy150Open sahana/eden/modules/unit_tests/s3/s3resource.py/MergePersonsTests.testMergeSingleComponent--crossover with--dataset/ETHPy150Open quantopian/zipline/zipline/pipeline/loaders/blaze/core.py/get_deltas