How to perform partial update using mutation?

[mciastek]

I'm trying to perform partial update using graphene. I'm following docs for serializers, but I can't run the mutation, because of required fields. Here's an example.

Serializer

class StudySerializer(serializers.ModelSerializer):
  class Meta:
    model = Study
    fields = '__all__'
    # required for accepting "id" in mutation's arguments
    # see https://github.com/graphql-python/graphene-django/issues/906#issuecomment-602078174
    extra_kwargs = {'id': {'read_only': False, 'required': False}}

Mutation

class UpdateStudy(SerializerMutation):
  class Meta:
    serializer_class = StudySerializer
    model_operations = ['update']

GraphQL is complaining about missing fields in mutation, but they should be optional

Is there any workaround for this?

[ulgens]

There is another library, called django-graphene-cud has DjangoPatchMutation. As far as i can see, it doesn't support relay but it may be short term solution. For long term, i think we should solve this issue in house, and also seperate create and update mutations.

[stale]

Is this still relevant? If so, what is blocking it? Is there anything you can do to help move it forward?

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.

[thomas-arun]

Was this ever fixed?

I have a similar situation where I have few fields in my model which are not nullable.
So I need to make sure they are passed during a create mutation but they are not mandatory during an update mutation.
Hence, I want to have a partial update while using the SerializerMutation during update mutations.

Currently the only way to make this work is by adding
extra_kwargs = {'<field_name>': 'required': False}} in the serializer meta class.

Like this:

class FooSerializer(serializers.ModelSerializer):
    class Meta:
        model = Foo
        fields = ['id',
                  'foo',
                  'bar' # this is the non nullable field
                 ]
        extra_kwargs = {'bar': {'required': False},

But this then makes the field optional for create mutation too, which then errors out from the database, because there is not null constraint for the field (bar in this example) in the database.

Is there any workaround or a fix for this?

[ulgens]

Considering the project is dead now, I'm removing myself as assignee. I wouldn't recommend expecting a fix.