diff options
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/topics/3.0-announcement.md | 26 |
1 files changed, 18 insertions, 8 deletions
diff --git a/docs/topics/3.0-announcement.md b/docs/topics/3.0-announcement.md index 4a781503..89817ea5 100644 --- a/docs/topics/3.0-announcement.md +++ b/docs/topics/3.0-announcement.md @@ -116,11 +116,12 @@ This would now be split out into two separate methods. instance.language = validated_data.get('language', instance.language) instance.style = validated_data.get('style', instance.style) instance.save() + return instance def create(self, validated_data): return Snippet.objects.create(**validated_data) -Note that the `.create` method should return the newly created object instance. +Note that these methods should return the newly created object instance. #### Use `.validated_data` instead of `.object`. @@ -592,18 +593,27 @@ The `UniqueTogetherValidator` should be applied to a serializer, and takes a `qu The view logic for the default method handlers has been significantly simplified, due to the new serializers API. -#### Removal of pre/post save hooks. +#### Changes to pre/post save hooks. -The following method hooks no longer exist on the new, simplified, generic views: `pre_save`, `post_save`, `pre_delete`, `post_delete`. +The `pre_save` and `post_save` hooks no longer exist, but are replaced with `perform_create(self, serializer)` and `perform_update(self, serializer)`. -If you do need custom behavior, you might choose to instead override the `.save()` method on your serializer class. For example: +These method should save the object instance by calling `serializer.save()`, adding in any explicit additional arguments as required. They may also perform any custom pre-save or post-save behavior. - def save(self, *args, **kwargs): - instance = super(MySerializer).save(*args, **kwarg) +For example: + + def perform_create(self, serializer): + # Include the owner attribute directly, rather than from request data. + instance = serializer.save(owner=self.request.user) + # Perform a custom post-save action. send_email(instance.to_email, instance.message) - return instance -Alternatively write your view logic exlpicitly, or tie your pre/post save behavior into the model class or model manager. +The `pre_delete` and `post_delete` hooks no longer exist, and are replaced with `.perform_destroy(self, instance)`, which should delete the instance and perform any custom actions. + + def perform_destroy(self, instance): + # Perform a custom pre-delete action. + send_deletion_alert(user=instance.created_by, deleted=instance) + # Delete the object instance. + instance.delete() #### Removal of view attributes. |
