How to use post_save method in Kiwi

Best Python code snippet using Kiwi_python

signals.py

Source:signals.py

...30        self.assertEqual(a.save(), 1)31        self.assertTrue(a.id is not None)32        self.assertEqual(len(state), 2)33        self.assertEqual(state[-1], (A, a, a.id, False))34    def test_post_save(self):35        state = []36        @signals.post_save()37        def post_save(sender, instance, created):38            state.append((sender, instance, instance._pk, created))39        a = A()40        a.save()41        self.assertTrue(a.id is not None)42        self.assertEqual(state, [(A, a, a.id, True)])43        a.save()44        self.assertEqual(len(state), 2)45        self.assertEqual(state[-1], (A, a, a.id, False))46    def test_pre_delete(self):47        state = []48        @signals.pre_delete()49        def pre_delete(sender, instance):50            state.append((sender, instance, A.select().count()))51        a = A.create()52        self.assertEqual(a.delete_instance(), 1)53        self.assertEqual(state, [(A, a, 1)])54    def test_post_delete(self):55        state = []56        @signals.post_delete()57        def post_delete(sender, instance):58            state.append((sender, instance, A.select().count()))59        a = A.create()60        a.delete_instance()61        self.assertEqual(state, [(A, a, 0)])62    def test_pre_init(self):63        state = []64        A.create(a='a')65        @signals.pre_init()66        def pre_init(sender, instance):67            state.append((sender, instance.a))68        A.get()69        self.assertEqual(state, [(A, 'a')])70    def test_sender(self):71        state = []72        @signals.post_save(sender=A)73        def post_save(sender, instance, created):74            state.append(instance)75        m = A.create()76        self.assertEqual(state, [m])77        m2 = B.create()78        self.assertEqual(state, [m])79    def test_connect_disconnect(self):80        state = []81        @signals.post_save(sender=A)82        def post_save(sender, instance, created):83            state.append(instance)84        a = A.create()85        self.assertEqual(state, [a])86        # Signal was registered with a specific sender, so this fails.87        self.assertRaises(ValueError, signals.post_save.disconnect, post_save)88        # Disconnect signal, specifying sender.89        signals.post_save.disconnect(post_save, sender=A)90        # Signal handler has been unregistered.91        a2 = A.create()92        self.assertEqual(state, [a])93        # Re-connect without specifying sender.94        signals.post_save.connect(post_save)95        a3 = A.create()96        self.assertEqual(state, [a, a3])97        # Signal was not registered with a sender, so this fails.98        self.assertRaises(ValueError, signals.post_save.disconnect, post_save,99                          sender=A)100        signals.post_save.disconnect(post_save)101    def test_function_reuse(self):102        state = []103        @signals.post_save(sender=A)104        def post_save(sender, instance, created):105            state.append(instance)106        # Connect function for sender=B as well.107        signals.post_save(sender=B)(post_save)108        a = A.create()109        b = B.create()110        self.assertEqual(state, [a, b])111    def test_subclass_instance_receive_signals(self):112        state = []113        @signals.post_save(sender=B)114        def post_save(sender, instance, created):115            state.append(instance)116        b = SubB.create()...

test_module.py

Source:test_module.py

1# Copyright 2012-2016 Canonical Ltd.  This software is licensed under the2# GNU Affero General Public License version 3 (see the file LICENSE).3"""Tests for `maasserver.testing`."""4import http.client5from django.db.models.signals import post_save, pre_save6from django.http import HttpResponse, HttpResponseRedirect7from testtools.matchers import Equals8from maasserver.models.node import Node9from maasserver.testing import extract_redirect, NoReceivers10from maasserver.testing.factory import factory11from maasserver.testing.orm import reload_objects12from maasserver.testing.testcase import MAASServerTestCase13from maasserver.utils.orm import reload_object14class TestHelpers(MAASServerTestCase):15    """Test helper functions."""16    def test_extract_redirect_extracts_redirect_location(self):17        url = factory.make_string()18        self.assertEqual(url, extract_redirect(HttpResponseRedirect(url)))19    def test_extract_redirect_only_returns_target_path(self):20        url_path = factory.make_string()21        self.assertEqual(22            "/%s" % url_path,23            extract_redirect(24                HttpResponseRedirect("http://example.com/%s" % url_path)25            ),26        )27    def test_extract_redirect_errors_out_helpfully_if_not_a_redirect(self):28        content = factory.make_string(10).encode("ascii")29        other_response = HttpResponse(content=content)30        try:31            extract_redirect(other_response)32        except ValueError as e:33            self.assertThat(34                str(e),35                Equals(36                    "Not a redirect: http status %d. Content: %s"37                    % (http.client.OK.value, content)38                ),39            )40    def test_reload_object_reloads_object(self):41        test_obj = factory.make_Node()42        test_obj.save()43        Node.objects.filter(id=test_obj.id).update(hostname="newname")44        self.assertEqual("newname", reload_object(test_obj).hostname)45    def test_reload_object_returns_None_for_deleted_object(self):46        test_obj = factory.make_Node()47        test_obj.save()48        Node.objects.filter(id=test_obj.id).delete()49        self.assertIsNone(reload_object(test_obj))50    def test_reload_objects_reloads_objects(self):51        hostnames = ["name1", "name2", "name3"]52        objs = [factory.make_Node(hostname=hostname) for hostname in hostnames]53        for obj in objs:54            obj.save()55        hostnames[0] = "different"56        Node.objects.filter(id=objs[0].id).update(hostname=hostnames[0])57        self.assertItemsEqual(58            hostnames, [obj.hostname for obj in reload_objects(Node, objs)]59        )60    def test_reload_objects_omits_deleted_objects(self):61        objs = [factory.make_Node() for counter in range(3)]62        for obj in objs:63            obj.save()64        dead_obj = objs.pop(0)65        Node.objects.filter(id=dead_obj.id).delete()66        self.assertItemsEqual(objs, reload_objects(Node, objs))67class TestNoReceivers(MAASServerTestCase):68    def test_clears_and_restores_signal(self):69        # post_save already has some receivers on it, but make sure.70        self.assertNotEqual(0, len(post_save.receivers))71        old_values = list(post_save.receivers)72        with NoReceivers(post_save):73            self.assertEqual([], post_save.receivers)74        self.assertItemsEqual(old_values, post_save.receivers)75    def test_clears_and_restores_many_signals(self):76        self.assertNotEqual(0, len(post_save.receivers))77        self.assertNotEqual(0, len(pre_save.receivers))78        old_pre_values = pre_save.receivers79        old_post_values = post_save.receivers80        with NoReceivers((post_save, pre_save)):81            self.assertEqual([], post_save.receivers)82            self.assertEqual([], pre_save.receivers)83        self.assertItemsEqual(old_pre_values, pre_save.receivers)84        self.assertItemsEqual(old_post_values, post_save.receivers)85    def test_leaves_some_other_signals_alone(self):86        self.assertNotEqual(0, len(post_save.receivers))87        old_pre_values = pre_save.receivers88        with NoReceivers(post_save):...

models.py

Source:models.py

1"""2Testing signals before/after saving and deleting.3"""4from django.db import models5class Person(models.Model):6    first_name = models.CharField(max_length=20)7    last_name = models.CharField(max_length=20)8    def __unicode__(self):9        return u"%s %s" % (self.first_name, self.last_name)10def pre_save_test(signal, sender, instance, **kwargs):11    print 'pre_save signal,', instance12    if kwargs.get('raw'):13        print 'Is raw'14def post_save_test(signal, sender, instance, **kwargs):15    print 'post_save signal,', instance16    if 'created' in kwargs:17        if kwargs['created']:18            print 'Is created'19        else:20            print 'Is updated'21    if kwargs.get('raw'):22        print 'Is raw'23def pre_delete_test(signal, sender, instance, **kwargs):24    print 'pre_delete signal,', instance25    print 'instance.id is not None: %s' % (instance.id != None)26# #8285: signals can be any callable27class PostDeleteHandler(object):28    def __call__(self, signal, sender, instance, **kwargs):29        print 'post_delete signal,', instance30        print 'instance.id is None: %s' % (instance.id == None)31post_delete_test = PostDeleteHandler()32__test__ = {'API_TESTS':"""33# Save up the number of connected signals so that we can check at the end34# that all the signals we register get properly unregistered (#9989)35>>> pre_signals = (len(models.signals.pre_save.receivers),36...                len(models.signals.post_save.receivers),37...                len(models.signals.pre_delete.receivers),38...                len(models.signals.post_delete.receivers))39>>> models.signals.pre_save.connect(pre_save_test)40>>> models.signals.post_save.connect(post_save_test)41>>> models.signals.pre_delete.connect(pre_delete_test)42>>> models.signals.post_delete.connect(post_delete_test)43>>> p1 = Person(first_name='John', last_name='Smith')44>>> p1.save()45pre_save signal, John Smith46post_save signal, John Smith47Is created48>>> p1.first_name = 'Tom'49>>> p1.save()50pre_save signal, Tom Smith51post_save signal, Tom Smith52Is updated53# Calling an internal method purely so that we can trigger a "raw" save.54>>> p1.save_base(raw=True)55pre_save signal, Tom Smith56Is raw57post_save signal, Tom Smith58Is updated59Is raw60>>> p1.delete()61pre_delete signal, Tom Smith62instance.id is not None: True63post_delete signal, Tom Smith64instance.id is None: False65>>> p2 = Person(first_name='James', last_name='Jones')66>>> p2.id = 9999967>>> p2.save()68pre_save signal, James Jones69post_save signal, James Jones70Is created71>>> p2.id = 9999872>>> p2.save()73pre_save signal, James Jones74post_save signal, James Jones75Is created76>>> p2.delete()77pre_delete signal, James Jones78instance.id is not None: True79post_delete signal, James Jones80instance.id is None: False81>>> Person.objects.all()82[<Person: James Jones>]83>>> models.signals.post_delete.disconnect(post_delete_test)84>>> models.signals.pre_delete.disconnect(pre_delete_test)85>>> models.signals.post_save.disconnect(post_save_test)86>>> models.signals.pre_save.disconnect(pre_save_test)87# Check that all our signals got disconnected properly.88>>> post_signals = (len(models.signals.pre_save.receivers),89...                 len(models.signals.post_save.receivers),90...                 len(models.signals.pre_delete.receivers),91...                 len(models.signals.post_delete.receivers))92>>> pre_signals == post_signals93True...

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