コード例 #1
0
    def test_image_to_string(self):
        image = {
            "url": "http://localhost:8000/api/image/2/",
            "id": 2,
            "security_marking": "UNCLASSIFIED"
            }

        out = model_access.image_to_string(image)
        self.assertEqual(out, "2.UNCLASSIFIED")

        image = models.Image.objects.get(id=1)
        out = model_access.image_to_string(image, True)
        self.assertEqual(out, "1.UNCLASSIFIED")
コード例 #2
0
    def test_image_to_string(self):
        image = {
            "url": "http://localhost:8000/api/image/2/",
            "id": 2,
            "security_marking": "UNCLASSIFIED"
        }

        out = model_access.image_to_string(image)
        self.assertEqual(out, "2.UNCLASSIFIED")

        image = models.Image.objects.get(id=1)
        out = model_access.image_to_string(image, True)
        self.assertEqual(out, "1.UNCLASSIFIED")
コード例 #3
0
    def test_image_to_string_dict(self):
        image = {
            "url": "http://localhost:8000/api/image/2/",
            "id": 2,
            "security_marking": "UNCLASSIFIED"
            }

        out = model_access.image_to_string(image)
        self.assertEqual(out, "2.UNCLASSIFIED")
コード例 #4
0
    def update(self, instance, validated_data):
        logger.debug('inside ListingSerializer.update')
        user = generic_model_access.get_profile(
            self.context['request'].user.username)

        if user.highest_role() not in ['APPS_MALL_STEWARD', 'ORG_STEWARD']:
            if user not in instance.owners.all():
                raise errors.PermissionDenied(
                    'User is not an owner of this listing')

        change_details = []

        simple_fields = ['title', 'description', 'description_short',
            'launch_url', 'version_name', 'requirements', 'unique_name',
            'what_is_new', 'security_marking']

        for i in simple_fields:
            if getattr(instance, i) != validated_data[i]:
                change_details.append({'old_value': getattr(instance, i),
                    'new_value': validated_data[i], 'field_name': i})
                setattr(instance, i, validated_data[i])

        if validated_data['is_enabled'] != instance.is_enabled:
            if validated_data['is_enabled']:
                model_access.enable_listing(user, instance)
                change_details.append({'field_name': 'is_enabled',
                    'old_value': 'false', 'new_value': 'true'})
            else:
                model_access.disable_listing(user, instance)
                change_details.append({'field_name': 'is_enabled',
                    'old_value': 'true', 'new_value': 'false'})

            instance.is_enabled = validated_data['is_enabled']

        if validated_data['is_private'] != instance.is_private:
            change_details.append({'old_value': model_access.bool_to_string(instance.is_private),
                    'new_value': model_access.bool_to_string(validated_data['is_private']), 'field_name': 'is_private'})
            instance.is_private = validated_data['is_private']

        if validated_data['is_featured'] != instance.is_featured:
            if user.highest_role() not in ['APPS_MALL_STEWARD', 'ORG_STEWARD']:
                raise errors.PermissionDenied('Only stewards can change is_featured setting of a listing')
            change_details.append({'old_value': model_access.bool_to_string(instance.is_featured),
                    'new_value': model_access.bool_to_string(validated_data['is_featured']), 'field_name': 'is_featured'})
            instance.is_featured = validated_data['is_featured']

        s = validated_data['approval_status']
        if s and s != instance.approval_status:
            if s == models.Listing.APPROVED and user.highest_role() != 'APPS_MALL_STEWARD':
                raise errors.PermissionDenied('Only an APPS_MALL_STEWARD can mark a listing as APPROVED')
            if s == models.Listing.APPROVED_ORG and user.highest_role() not in ['APPS_MALL_STEWARD', 'ORG_STEWARD']:
                raise errors.PermissionDenied('Only stewards can mark a listing as APPROVED_ORG')

            if s == models.Listing.PENDING:
                model_access.submit_listing(user, instance)
            if s == models.Listing.APPROVED_ORG:
                model_access.approve_listing_by_org_steward(user, instance)
            if s == models.Listing.APPROVED:
                model_access.approve_listing(user, instance)
            if s == models.Listing.REJECTED:
                # TODO: need to get the rejection text from somewhere
                model_access.reject_listing(user, instance, 'TODO: rejection reason')

        if instance.listing_type != validated_data['listing_type']:
            if instance.listing_type:
                old_value = instance.listing_type.title
            else:
                old_value = None
            if validated_data['listing_type']:
                new_value = validated_data['listing_type'].title
            else:
                new_value = None
            change_details.append({'old_value': old_value,
                    'new_value': new_value, 'field_name': 'listing_type'})
            instance.listing_type = validated_data['listing_type']

        image_keys = ['small_icon', 'large_icon', 'banner_icon', 'large_banner_icon']
        for image_key in image_keys:
            if validated_data[image_key]:
                old_value = model_access.image_to_string(getattr(instance, image_key), True, 'old_value(%s)'%image_key)
                new_value = model_access.image_to_string(validated_data[image_key], False, 'new_value(%s)'%image_key)

                if old_value != new_value:
                    new_value_image = None

                    old_image_id = None
                    if old_value is not None:
                        old_image_id = getattr(instance, image_key).id
                    if validated_data[image_key].get('id') == old_image_id:
                        new_value_image = getattr(instance, image_key)
                        new_value_image.security_marking = validated_data[image_key].get('security_marking')
                        new_value_image.save()
                    else:
                        new_value_image = image_model_access.get_image_by_id(validated_data[image_key].get('id'))

                        if new_value_image is None:
                            raise errors.InvalidInput('Error while saving, can not find image by id')

                    change_details.append({'old_value': old_value,
                            'new_value': new_value, 'field_name': image_key})

                    if image_key == 'small_icon':
                        instance.small_icon = new_value_image
                    elif image_key == 'large_icon':
                        instance.large_icon = new_value_image
                    elif image_key == 'banner_icon':
                        instance.banner_icon = new_value_image
                    elif image_key == 'large_banner_icon':
                        instance.large_banner_icon = new_value_image

        if 'contacts' in validated_data:
            old_contact_instances = instance.contacts.all()
            old_contacts = model_access.contacts_to_string(
                old_contact_instances, True)
            new_contacts = model_access.contacts_to_string(
                validated_data['contacts'])

            if old_contacts != new_contacts:
                change_details.append({'old_value': old_contacts,
                    'new_value': new_contacts, 'field_name': 'contacts'})
                instance.contacts.clear()
                for contact in validated_data['contacts']:
                    # TODO: Smarter Handling of Duplicates Contact Records
                    # A contact with the same name and email should be the same contact
                    # in the backend.
                    # Person1(name='N1',email='*****@*****.**') and
                    #    Person1' (name='N1',email='*****@*****.**',secure_phone = '414-444-444')
                    # The two people above should be one contact
                    # if approval_status: "IN_PROGRESS" then it should be using
                    # contact model ids' since it is temporary contacts
                    obj, created = models.Contact.objects.get_or_create(
                        name=contact['name'],
                        email=contact['email'],
                        secure_phone=contact['secure_phone'],
                        unsecure_phone=contact['unsecure_phone'],
                        organization=contact.get('organization', None),
                        contact_type=contact_type_model_access.get_contact_type_by_name(
                            contact['contact_type']['name'])
                    )
                    instance.contacts.add(obj)

        if 'categories' in validated_data:
            old_category_instances = instance.categories.all()
            old_categories = model_access.categories_to_string(
                old_category_instances, True)
            new_categories = model_access.categories_to_string(
                validated_data['categories'], True)
            if old_categories != new_categories:
                change_details.append({'old_value': old_categories,
                    'new_value': new_categories, 'field_name': 'categories'})
                instance.categories.clear()
                for category in validated_data['categories']:
                    instance.categories.add(category)

        if 'owners' in validated_data:
            old_owner_instances = instance.owners.all()
            old_owners = model_access.owners_to_string(
                old_owner_instances, True)
            new_owners = model_access.owners_to_string(
                validated_data['owners'], True)
            if old_owners != new_owners:
                change_details.append({'old_value': old_owners,
                    'new_value': new_owners, 'field_name': 'owners'})
                instance.owners.clear()
                for owner in validated_data['owners']:
                    instance.owners.add(owner)

        # tags will be automatically created if necessary
        if 'tags' in validated_data:
            old_tag_instances = instance.tags.all()
            old_tags = model_access.tags_to_string(old_tag_instances, True)
            new_tags = model_access.tags_to_string(validated_data['tags'])
            if old_tags != new_tags:
                change_details.append({'old_value': old_tags,
                    'new_value': new_tags, 'field_name': 'tags'})
                instance.tags.clear()
                for tag in validated_data['tags']:
                    obj, created = models.Tag.objects.get_or_create(
                        name=tag['name'])
                    instance.tags.add(obj)

        if 'intents' in validated_data:
            old_intent_instances = instance.intents.all()
            old_intents = model_access.intents_to_string(old_intent_instances,
                True)
            new_intents = model_access.intents_to_string(
                validated_data['intents'], True)
            if old_intents != new_intents:
                change_details.append({'old_value': old_intents,
                    'new_value': new_intents, 'field_name': 'intents'})
                instance.intents.clear()
                for intent in validated_data['intents']:
                    instance.intents.add(intent)

        # doc_urls will be automatically created
        if 'doc_urls' in validated_data:
            old_doc_url_instances = model_access.get_doc_urls_for_listing(instance)
            old_doc_urls = model_access.doc_urls_to_string(
                old_doc_url_instances, True)
            new_doc_urls = model_access.doc_urls_to_string(
                validated_data['doc_urls'])
            if old_doc_urls != new_doc_urls:
                change_details.append({
                    'old_value': old_doc_urls,
                    'new_value': new_doc_urls,
                    'field_name': 'doc_urls'})

                new_doc_url_instances = []
                for d in validated_data['doc_urls']:
                    obj, created = models.DocUrl.objects.get_or_create(
                        name=d['name'], url=d['url'], listing=instance)
                    new_doc_url_instances.append(obj)
                for i in old_doc_url_instances:
                    if i not in new_doc_url_instances:
                        logger.info('Deleting doc_url: %s' % i.id)
                        i.delete()

        # screenshots will be automatically created
        if 'screenshots' in validated_data:
            old_screenshot_instances = model_access.get_screenshots_for_listing(instance)
            old_screenshots = model_access.screenshots_to_string(old_screenshot_instances, True)
            new_screenshots = model_access.screenshots_to_string(validated_data['screenshots'])
            if old_screenshots != new_screenshots:
                change_details.append({'old_value': old_screenshots,
                    'new_value': new_screenshots, 'field_name': 'screenshots'})

            new_screenshot_instances = []

            for s in validated_data['screenshots']:

                new_small_image = image_model_access.get_image_by_id(s['small_image']['id'])
                new_small_image.security_marking = s['small_image']['security_marking']
                new_small_image.save()

                new_large_image = image_model_access.get_image_by_id(s['large_image']['id'])
                new_large_image.security_marking = s['large_image']['security_marking']
                new_large_image.save()

                obj, created = models.Screenshot.objects.get_or_create(
                    small_image=new_small_image,
                    large_image=new_large_image,
                    listing=instance)


                new_screenshot_instances.append(obj)

            for i in old_screenshot_instances:
                if i not in new_screenshot_instances:
                    logger.info('Deleting screenshot: %s' % i.id)
                    i.delete()

        if 'agency' in validated_data:
            if instance.agency != validated_data['agency']:
                change_details.append({'old_value': instance.agency.title,
                    'new_value': validated_data['agency'].title, 'field_name': 'agency'})
                instance.agency = validated_data['agency']

        instance.save()

        model_access.log_listing_modification(user, instance, change_details)
        instance.edited_date = datetime.datetime.now(pytz.utc)
        return instance
コード例 #5
0
 def test_image_to_string_object(self):
     listing_banner_icon_id = models.Listing.objects.get(unique_name='ozp.test.air_mail').banner_icon.id
     image = models.Image.objects.get(id=listing_banner_icon_id)
     out = model_access.image_to_string(image, True)
     self.assertEqual(out, "{}.UNCLASSIFIED".format(listing_banner_icon_id))
コード例 #6
0
def update_listing(serializer_instance, instance, validated_data):
    # TODO Put in listing model_access.py
    user = generic_model_access.get_profile(serializer_instance.context['request'].user.username)

    if user.highest_role() not in ['APPS_MALL_STEWARD', 'ORG_STEWARD']:
        if user not in instance.owners.all():
            raise errors.PermissionDenied(
                'User ({0!s}) is not an owner of this listing'.format(user.username))

    if instance.is_deleted:
        raise errors.PermissionDenied('Cannot update a previously deleted listing')

    change_details = []

    simple_fields = ['title', 'description', 'description_short',
        'launch_url', 'version_name', 'usage_requirements', 'system_requirements', 'unique_name',
        'what_is_new', 'security_marking']

    for i in simple_fields:
        if getattr(instance, i) != validated_data[i]:
            if validated_data[i] is not None:
                change_details.append({'old_value': getattr(instance, i),
                    'new_value': validated_data[i], 'field_name': i})
                setattr(instance, i, validated_data[i])

    if validated_data['is_enabled'] is not None and validated_data['is_enabled'] != instance.is_enabled:
        if validated_data['is_enabled']:
            model_access.enable_listing(user, instance)
        else:
            model_access.disable_listing(user, instance)

        instance.is_enabled = validated_data['is_enabled']

        if validated_data['approval_status'] == models.Listing.APPROVED:
            dispatcher.publish('listing_enabled_status_changed',
                               listing=instance,
                               profile=user,
                               is_enabled=validated_data['is_enabled'])

    if validated_data['is_508_compliant'] is not None and validated_data['is_508_compliant'] != instance.is_508_compliant:
        changeset = {'old_value': model_access.bool_to_string(instance.is_508_compliant),
                'new_value': model_access.bool_to_string(validated_data['is_508_compliant']), 'field_name': 'is_508_compliant'}
        change_details.append(changeset)
        instance.is_508_compliant = validated_data['is_508_compliant']

    if validated_data['is_private'] is not None and validated_data['is_private'] != instance.is_private:
        changeset = {'old_value': model_access.bool_to_string(instance.is_private),
                'new_value': model_access.bool_to_string(validated_data['is_private']), 'field_name': 'is_private'}
        change_details.append(changeset)
        instance.is_private = validated_data['is_private']

        if validated_data['approval_status'] == models.Listing.APPROVED:
            dispatcher.publish('listing_private_status_changed',
                               listing=instance,
                               profile=user,
                               is_private=validated_data['is_private'])

    if validated_data['is_featured'] is not None and validated_data['is_featured'] != instance.is_featured:
        if user.highest_role() not in ['APPS_MALL_STEWARD', 'ORG_STEWARD']:
            raise errors.PermissionDenied('Only stewards can change is_featured setting of a listing')

        change_details.append({'old_value': model_access.bool_to_string(instance.is_featured),
                'new_value': model_access.bool_to_string(validated_data['is_featured']), 'field_name': 'is_featured'})
        instance.is_featured = validated_data['is_featured']
        instance.featured_date = datetime.datetime.now(pytz.utc) if validated_data['is_featured'] else None

    s = validated_data['approval_status']
    if s and s != instance.approval_status:  # Check to see if approval_status has changed
        old_approval_status = instance.approval_status
        if s == models.Listing.APPROVED and user.highest_role() != 'APPS_MALL_STEWARD':
            raise errors.PermissionDenied('Only an APPS_MALL_STEWARD can mark a listing as APPROVED')
        if s == models.Listing.APPROVED_ORG and user.highest_role() not in ['APPS_MALL_STEWARD', 'ORG_STEWARD']:
            raise errors.PermissionDenied('Only stewards can mark a listing as APPROVED_ORG')
        if s == models.Listing.PENDING:
            model_access.submit_listing(user, instance)
        if s == models.Listing.PENDING_DELETION:
            # pending deletion should be handled through ListingPendingDeletionViewSet
            # keeping this here for now for backwards compatibility
            model_access.pending_delete_listing(user, instance, 'Unknown reason')
        if s == models.Listing.APPROVED_ORG:
            model_access.approve_listing_by_org_steward(user, instance)
        if s == models.Listing.APPROVED:
            model_access.approve_listing(user, instance)
        if s == models.Listing.REJECTED:
            # TODO: need to get the rejection text from somewhere
            model_access.reject_listing(user, instance, 'TODO: rejection reason')

        dispatcher.publish('listing_approval_status_changed',
                           listing=instance,
                           profile=user,
                           old_approval_status=old_approval_status,
                           new_approval_status=instance.approval_status)

    if instance.listing_type != validated_data['listing_type']:
        if instance.listing_type:
            old_value = instance.listing_type.title
        else:
            old_value = None
        if validated_data['listing_type']:
            new_value = validated_data['listing_type'].title
        else:
            new_value = None
        change_details.append({'old_value': old_value,
                'new_value': new_value, 'field_name': 'listing_type'})
        instance.listing_type = validated_data['listing_type']

    image_keys = ['small_icon', 'large_icon', 'banner_icon', 'large_banner_icon']
    for image_key in image_keys:
        if validated_data[image_key]:
            old_value = model_access.image_to_string(getattr(instance, image_key), True, 'old_value({0!s})'.format(image_key))
            new_value = model_access.image_to_string(validated_data[image_key], False, 'new_value({0!s})'.format(image_key))

            if old_value != new_value:
                new_value_image = None

                old_image_id = None
                if old_value is not None:
                    old_image_id = getattr(instance, image_key).id
                if validated_data[image_key].get('id') == old_image_id:
                    new_value_image = getattr(instance, image_key)
                    new_value_image.security_marking = validated_data[image_key].get('security_marking')
                    new_value_image.save()
                else:
                    new_value_image = image_model_access.get_image_by_id(validated_data[image_key].get('id'))

                    if new_value_image is None:
                        raise errors.InvalidInput('Error while saving, can not find image by id')

                change_details.append({'old_value': old_value,
                        'new_value': new_value, 'field_name': image_key})

                if image_key == 'small_icon':
                    instance.small_icon = new_value_image
                elif image_key == 'large_icon':
                    instance.large_icon = new_value_image
                elif image_key == 'banner_icon':
                    instance.banner_icon = new_value_image
                elif image_key == 'large_banner_icon':
                    instance.large_banner_icon = new_value_image

    if 'contacts' in validated_data:
        old_contact_instances = instance.contacts.all()
        old_contacts = model_access.contacts_to_string(old_contact_instances, True)
        new_contacts = model_access.contacts_to_string(validated_data['contacts'])

        if old_contacts != new_contacts:
            change_details.append({'old_value': old_contacts,
                'new_value': new_contacts, 'field_name': 'contacts'})
            instance.contacts.clear()
            for contact in validated_data['contacts']:
                # TODO: Smarter Handling of Duplicates Contact Records
                # A contact with the same name and email should be the same contact
                # in the backend.
                # Person1(name='N1',email='*****@*****.**') and
                #    Person1' (name='N1',email='*****@*****.**',secure_phone = '414-444-444')
                # The two people above should be one contact
                # if approval_status: "IN_PROGRESS" then it should be using
                # contact model ids' since it is temporary contacts
                obj, created = models.Contact.objects.get_or_create(
                    name=contact['name'],
                    email=contact['email'],
                    secure_phone=contact['secure_phone'],
                    unsecure_phone=contact['unsecure_phone'],
                    organization=contact.get('organization', None),
                    contact_type=contact_type_model_access.get_contact_type_by_name(
                        contact['contact_type']['name'])
                )
                instance.contacts.add(obj)

    if 'categories' in validated_data:
        old_category_instances = instance.categories.all()
        old_categories = model_access.categories_to_string(old_category_instances, True)
        new_categories = model_access.categories_to_string(validated_data['categories'], True)

        if old_categories != new_categories:
            changeset = {'old_value': old_categories,
                'new_value': new_categories, 'field_name': 'categories'}
            change_details.append(changeset)
            instance.categories.clear()
            for category in validated_data['categories']:
                instance.categories.add(category)

            dispatcher.publish('listing_categories_changed',
                               listing=instance,
                               profile=user,
                               old_categories=old_category_instances,
                               new_categories=validated_data['categories'])

    if 'owners' in validated_data:
        old_owner_instances = instance.owners.all()
        old_owners = model_access.owners_to_string(old_owner_instances, True)
        new_owners = model_access.owners_to_string(validated_data['owners'], True)
        if old_owners != new_owners:
            change_details.append({'old_value': old_owners,
                'new_value': new_owners, 'field_name': 'owners'})
            instance.owners.clear()
            for owner in validated_data['owners']:
                instance.owners.add(owner)

    # tags will be automatically created if necessary
    if 'tags' in validated_data:
        old_tag_instances = instance.tags.all()
        old_tags = model_access.tags_to_string(old_tag_instances, True)
        new_tags = model_access.tags_to_string(validated_data['tags'])

        if old_tags != new_tags:
            changeset = {'old_value': old_tags,
                         'new_value': new_tags, 'field_name': 'tags'}
            change_details.append(changeset)
            instance.tags.clear()
            new_tags_instances = []
            for tag in validated_data['tags']:
                obj, created = models.Tag.objects.get_or_create(
                    name=tag['name'])
                instance.tags.add(obj)
                new_tags_instances.append(obj)

            dispatcher.publish('listing_tags_changed',
                               listing=instance,
                               profile=user,
                               old_tags=old_tag_instances,
                               new_tags=new_tags_instances)

    if 'intents' in validated_data:
        old_intent_instances = instance.intents.all()
        old_intents = model_access.intents_to_string(old_intent_instances, True)
        new_intents = model_access.intents_to_string(validated_data['intents'], True)
        if old_intents != new_intents:
            change_details.append({'old_value': old_intents,
                'new_value': new_intents, 'field_name': 'intents'})
            instance.intents.clear()
            for intent in validated_data['intents']:
                instance.intents.add(intent)

    # doc_urls will be automatically created
    if 'doc_urls' in validated_data:
        old_doc_url_instances = model_access.get_doc_urls_for_listing(instance)
        old_doc_urls = model_access.doc_urls_to_string(old_doc_url_instances, True)
        new_doc_urls = model_access.doc_urls_to_string(validated_data['doc_urls'])
        if old_doc_urls != new_doc_urls:
            change_details.append({
                'old_value': old_doc_urls,
                'new_value': new_doc_urls,
                'field_name': 'doc_urls'})

            new_doc_url_instances = []
            for d in validated_data['doc_urls']:
                obj, created = models.DocUrl.objects.get_or_create(
                    name=d['name'], url=d['url'], listing=instance)
                new_doc_url_instances.append(obj)
            for i in old_doc_url_instances:
                if i not in new_doc_url_instances:
                    logger.info('Deleting doc_url: {0!s}'.format(i.id), extra={'request': serializer_instance.context.get('request')})
                    i.delete()

    # screenshots will be automatically created
    if 'screenshots' in validated_data:
        old_screenshot_instances = model_access.get_screenshots_for_listing(instance)
        old_screenshots = model_access.screenshots_to_string(old_screenshot_instances, True)
        new_screenshots = model_access.screenshots_to_string(validated_data['screenshots'])
        if old_screenshots != new_screenshots:
            change_details.append({'old_value': old_screenshots,
                'new_value': new_screenshots, 'field_name': 'screenshots'})

        new_screenshot_instances = []

        for s in validated_data['screenshots']:
            new_small_image = image_model_access.get_image_by_id(s['small_image']['id'])
            new_small_image.security_marking = s['small_image']['security_marking']
            new_small_image.save()

            new_large_image = image_model_access.get_image_by_id(s['large_image']['id'])
            new_large_image.security_marking = s['large_image']['security_marking']
            new_large_image.save()

            obj, created = models.Screenshot.objects.get_or_create(
                order=s.get('order'),
                small_image=new_small_image,
                large_image=new_large_image,
                description=s.get('description'),
                listing=instance)

            new_screenshot_instances.append(obj)

        for i in old_screenshot_instances:
            if i not in new_screenshot_instances:
                logger.info('Deleting screenshot: {0!s}'.format(i.id), extra={'request': serializer_instance.context.get('request')})
                i.delete()

    if 'agency' in validated_data:
        if instance.agency != validated_data['agency']:
            change_details.append({'old_value': instance.agency.title,
                'new_value': validated_data['agency'].title, 'field_name': 'agency'})
            instance.agency = validated_data['agency']

    instance.save()

    # If the listing was modified add an entry showing changes
    if change_details:
        model_access.log_listing_modification(user, instance, change_details)

        new_change_details = []
        field_to_exclude = ['is_private', 'categories', 'tags']
        for change_detail in change_details:
            if change_detail['field_name'] not in field_to_exclude:
                new_change_details.append(change_detail)

        if new_change_details:
            dispatcher.publish('listing_changed',
                               listing=instance,
                               profile=user,
                               change_details=new_change_details)

    instance.edited_date = datetime.datetime.now(pytz.utc)
    return instance
コード例 #7
0
ファイル: serializers.py プロジェクト: nssbu/ozp-backend
    def update(self, instance, validated_data):
        # logger.debug('inside ListingSerializer.update', extra={'request':self.context.get('request')})
        user = generic_model_access.get_profile(
            self.context['request'].user.username)

        if user.highest_role() not in ['APPS_MALL_STEWARD', 'ORG_STEWARD']:
            if user not in instance.owners.all():
                raise errors.PermissionDenied(
                    'User ({0!s}) is not an owner of this listing'.format(
                        user.username))

        if instance.is_deleted:
            raise errors.PermissionDenied(
                'Cannot update a previously deleted listing')

        change_details = []

        simple_fields = [
            'title', 'description', 'description_short', 'launch_url',
            'version_name', 'requirements', 'unique_name', 'what_is_new',
            'security_marking'
        ]

        for i in simple_fields:
            if getattr(instance, i) != validated_data[i]:
                change_details.append({
                    'old_value': getattr(instance, i),
                    'new_value': validated_data[i],
                    'field_name': i
                })
                setattr(instance, i, validated_data[i])

        if validated_data['is_enabled'] != instance.is_enabled:
            if validated_data['is_enabled']:
                model_access.enable_listing(user, instance)
            else:
                model_access.disable_listing(user, instance)

            instance.is_enabled = validated_data['is_enabled']

        if validated_data['is_private'] != instance.is_private:
            change_details.append({
                'old_value':
                model_access.bool_to_string(instance.is_private),
                'new_value':
                model_access.bool_to_string(validated_data['is_private']),
                'field_name':
                'is_private'
            })
            instance.is_private = validated_data['is_private']

        if validated_data['is_featured'] != instance.is_featured:
            if user.highest_role() not in ['APPS_MALL_STEWARD', 'ORG_STEWARD']:
                raise errors.PermissionDenied(
                    'Only stewards can change is_featured setting of a listing'
                )
            change_details.append({
                'old_value':
                model_access.bool_to_string(instance.is_featured),
                'new_value':
                model_access.bool_to_string(validated_data['is_featured']),
                'field_name':
                'is_featured'
            })
            instance.is_featured = validated_data['is_featured']

        s = validated_data['approval_status']
        if s and s != instance.approval_status:
            if s == models.Listing.APPROVED and user.highest_role(
            ) != 'APPS_MALL_STEWARD':
                raise errors.PermissionDenied(
                    'Only an APPS_MALL_STEWARD can mark a listing as APPROVED')
            if s == models.Listing.APPROVED_ORG and user.highest_role(
            ) not in ['APPS_MALL_STEWARD', 'ORG_STEWARD']:
                raise errors.PermissionDenied(
                    'Only stewards can mark a listing as APPROVED_ORG')
            if s == models.Listing.PENDING:
                model_access.submit_listing(user, instance)
            if s == models.Listing.APPROVED_ORG:
                model_access.approve_listing_by_org_steward(user, instance)
            if s == models.Listing.APPROVED:
                model_access.approve_listing(user, instance)
            if s == models.Listing.REJECTED:
                # TODO: need to get the rejection text from somewhere
                model_access.reject_listing(user, instance,
                                            'TODO: rejection reason')

        if instance.listing_type != validated_data['listing_type']:
            if instance.listing_type:
                old_value = instance.listing_type.title
            else:
                old_value = None
            if validated_data['listing_type']:
                new_value = validated_data['listing_type'].title
            else:
                new_value = None
            change_details.append({
                'old_value': old_value,
                'new_value': new_value,
                'field_name': 'listing_type'
            })
            instance.listing_type = validated_data['listing_type']

        image_keys = [
            'small_icon', 'large_icon', 'banner_icon', 'large_banner_icon'
        ]
        for image_key in image_keys:
            if validated_data[image_key]:
                old_value = model_access.image_to_string(
                    getattr(instance, image_key), True,
                    'old_value({0!s})'.format(image_key))
                new_value = model_access.image_to_string(
                    validated_data[image_key], False,
                    'new_value({0!s})'.format(image_key))

                if old_value != new_value:
                    new_value_image = None

                    old_image_id = None
                    if old_value is not None:
                        old_image_id = getattr(instance, image_key).id
                    if validated_data[image_key].get('id') == old_image_id:
                        new_value_image = getattr(instance, image_key)
                        new_value_image.security_marking = validated_data[
                            image_key].get('security_marking')
                        new_value_image.save()
                    else:
                        new_value_image = image_model_access.get_image_by_id(
                            validated_data[image_key].get('id'))

                        if new_value_image is None:
                            raise errors.InvalidInput(
                                'Error while saving, can not find image by id')

                    change_details.append({
                        'old_value': old_value,
                        'new_value': new_value,
                        'field_name': image_key
                    })

                    if image_key == 'small_icon':
                        instance.small_icon = new_value_image
                    elif image_key == 'large_icon':
                        instance.large_icon = new_value_image
                    elif image_key == 'banner_icon':
                        instance.banner_icon = new_value_image
                    elif image_key == 'large_banner_icon':
                        instance.large_banner_icon = new_value_image

        if 'contacts' in validated_data:
            old_contact_instances = instance.contacts.all()
            old_contacts = model_access.contacts_to_string(
                old_contact_instances, True)
            new_contacts = model_access.contacts_to_string(
                validated_data['contacts'])

            if old_contacts != new_contacts:
                change_details.append({
                    'old_value': old_contacts,
                    'new_value': new_contacts,
                    'field_name': 'contacts'
                })
                instance.contacts.clear()
                for contact in validated_data['contacts']:
                    # TODO: Smarter Handling of Duplicates Contact Records
                    # A contact with the same name and email should be the same contact
                    # in the backend.
                    # Person1(name='N1',email='*****@*****.**') and
                    #    Person1' (name='N1',email='*****@*****.**',secure_phone = '414-444-444')
                    # The two people above should be one contact
                    # if approval_status: "IN_PROGRESS" then it should be using
                    # contact model ids' since it is temporary contacts
                    obj, created = models.Contact.objects.get_or_create(
                        name=contact['name'],
                        email=contact['email'],
                        secure_phone=contact['secure_phone'],
                        unsecure_phone=contact['unsecure_phone'],
                        organization=contact.get('organization', None),
                        contact_type=contact_type_model_access.
                        get_contact_type_by_name(
                            contact['contact_type']['name']))
                    instance.contacts.add(obj)

        if 'categories' in validated_data:
            old_category_instances = instance.categories.all()
            old_categories = model_access.categories_to_string(
                old_category_instances, True)
            new_categories = model_access.categories_to_string(
                validated_data['categories'], True)
            if old_categories != new_categories:
                change_details.append({
                    'old_value': old_categories,
                    'new_value': new_categories,
                    'field_name': 'categories'
                })
                instance.categories.clear()
                for category in validated_data['categories']:
                    instance.categories.add(category)

        if 'owners' in validated_data:
            old_owner_instances = instance.owners.all()
            old_owners = model_access.owners_to_string(old_owner_instances,
                                                       True)
            new_owners = model_access.owners_to_string(
                validated_data['owners'], True)
            if old_owners != new_owners:
                change_details.append({
                    'old_value': old_owners,
                    'new_value': new_owners,
                    'field_name': 'owners'
                })
                instance.owners.clear()
                for owner in validated_data['owners']:
                    instance.owners.add(owner)

        # tags will be automatically created if necessary
        if 'tags' in validated_data:
            old_tag_instances = instance.tags.all()
            old_tags = model_access.tags_to_string(old_tag_instances, True)
            new_tags = model_access.tags_to_string(validated_data['tags'])
            if old_tags != new_tags:
                change_details.append({
                    'old_value': old_tags,
                    'new_value': new_tags,
                    'field_name': 'tags'
                })
                instance.tags.clear()
                for tag in validated_data['tags']:
                    obj, created = models.Tag.objects.get_or_create(
                        name=tag['name'])
                    instance.tags.add(obj)

        if 'intents' in validated_data:
            old_intent_instances = instance.intents.all()
            old_intents = model_access.intents_to_string(
                old_intent_instances, True)
            new_intents = model_access.intents_to_string(
                validated_data['intents'], True)
            if old_intents != new_intents:
                change_details.append({
                    'old_value': old_intents,
                    'new_value': new_intents,
                    'field_name': 'intents'
                })
                instance.intents.clear()
                for intent in validated_data['intents']:
                    instance.intents.add(intent)

        # doc_urls will be automatically created
        if 'doc_urls' in validated_data:
            old_doc_url_instances = model_access.get_doc_urls_for_listing(
                instance)
            old_doc_urls = model_access.doc_urls_to_string(
                old_doc_url_instances, True)
            new_doc_urls = model_access.doc_urls_to_string(
                validated_data['doc_urls'])
            if old_doc_urls != new_doc_urls:
                change_details.append({
                    'old_value': old_doc_urls,
                    'new_value': new_doc_urls,
                    'field_name': 'doc_urls'
                })

                new_doc_url_instances = []
                for d in validated_data['doc_urls']:
                    obj, created = models.DocUrl.objects.get_or_create(
                        name=d['name'], url=d['url'], listing=instance)
                    new_doc_url_instances.append(obj)
                for i in old_doc_url_instances:
                    if i not in new_doc_url_instances:
                        logger.info(
                            'Deleting doc_url: {0!s}'.format(i.id),
                            extra={'request': self.context.get('request')})
                        i.delete()

        # screenshots will be automatically created
        if 'screenshots' in validated_data:
            old_screenshot_instances = model_access.get_screenshots_for_listing(
                instance)
            old_screenshots = model_access.screenshots_to_string(
                old_screenshot_instances, True)
            new_screenshots = model_access.screenshots_to_string(
                validated_data['screenshots'])
            if old_screenshots != new_screenshots:
                change_details.append({
                    'old_value': old_screenshots,
                    'new_value': new_screenshots,
                    'field_name': 'screenshots'
                })

            new_screenshot_instances = []

            for s in validated_data['screenshots']:

                new_small_image = image_model_access.get_image_by_id(
                    s['small_image']['id'])
                new_small_image.security_marking = s['small_image'][
                    'security_marking']
                new_small_image.save()

                new_large_image = image_model_access.get_image_by_id(
                    s['large_image']['id'])
                new_large_image.security_marking = s['large_image'][
                    'security_marking']
                new_large_image.save()

                obj, created = models.Screenshot.objects.get_or_create(
                    small_image=new_small_image,
                    large_image=new_large_image,
                    listing=instance)

                new_screenshot_instances.append(obj)

            for i in old_screenshot_instances:
                if i not in new_screenshot_instances:
                    logger.info('Deleting screenshot: {0!s}'.format(i.id),
                                extra={'request': self.context.get('request')})
                    i.delete()

        if 'agency' in validated_data:
            if instance.agency != validated_data['agency']:
                change_details.append({
                    'old_value': instance.agency.title,
                    'new_value': validated_data['agency'].title,
                    'field_name': 'agency'
                })
                instance.agency = validated_data['agency']

        instance.save()

        # If the listing was modified add an entry showing changes
        if change_details:
            model_access.log_listing_modification(user, instance,
                                                  change_details)

        instance.edited_date = datetime.datetime.now(pytz.utc)
        return instance