The result after serialize will not have `included` if the input doesn't have attributes

[yidongw]

Considering this data

  {
      id: 'u999',
      name: 'Awesome Project',
      description: 'This is an awesome project',
      format: {
        id: 'u1',
        inputFormats: [ 'u45', 'u46' ],
        outputFormats: [ 'u47', 'u48' ],
      }
    }

with this serializer

serializer.register("projects", {
  whitelist: ["name", "description"],
  relationships: {
    format: {
      type: 'format',
    }
  },
});

serializer.register("format", {
  relationships: {
    inputFormats: {
      type: 'inputFormats',
    },
    outputFormats: {
      type: 'outputFormats',
    }
  }
});

After serializing the data, it will not serialize the [ 'u45', 'u46' ] and [ 'u47', 'u48' ] and include the results in the included, unless I have some attributes in the format serializer and provide that attributes in the format in the data

Another thing is I can't have an empty list of attributes (whitelist). AFAIK JSON API doesn't say we have to have attributes in the resource

[danivek]

it closes the first issue you mentioned.

For the empty list of attributes a major version is required because the default value of this option is a currently empty list.

It needed a new issue.

[danivek]

@yidongw Actually, a possible workaround to have an empty list of attributes is to use the option like that: whitelist: ['']

[groyoh]

@danivek thanks for this fix! I faced this bug earlier today and saw it fixed on master when checking the codebase. Would it be possible for you to create a patch release?

[danivek]

@groyoh v2.6.4 🎉

[groyoh]

Thanks @danivek ! 🙌