Possible bug? render jsonapi returning error: undefined method `any?' for object

[kitsuneyo]

Apologies for a second issue in a few days. This one is probably something I'm doing wrong, but I don't know how to fix it and hoping someone can help.

I'm using render jsonapi: @record across every show, create, and update action in my API, and it works great, except for in one controller.

I have a model Media::Image and a serializer Media::ImageSerializer. Here's the serializer:

class Media::ImageSerializer < ApplicationSerializer
  set_type :image

  attribute :original do |record|
    record.file.url.presence if record.file.url
  end

  attribute :thumb do |record|
    record.file.versions[:th].url.presence if record.file.versions
  end

  attributes  :kind, :title, :description, :height, :width, :size, :year,
              :date, :usage_type, :attributed_name, :attributed_url,
              :source_url, :slug

  belongs_to  :uploaded_by, serializer: UserSerializer
  belongs_to  :media_license, serializer: Media::LicenseSerializer
  belongs_to  :place, serializer: PlaceSerializer
  has_many    :articles, serializer: ArticleSerializer

  meta do |record|
    base_meta(record)
  end
end

Expected Behavior

When setting @record = Media::Image.find(some_id) and calling render jsonapi: @record, status: :ok, the serializer should serialize the resource.

Actual Behavior

What actually happens is that an error is thrown, e.g.

NoMethodError: undefined method `any?' for #<Media::Image:0x00007fa11c436218>

Even if I remove every attribute and relationship from the serializer, I still get the error.

I can render collections just fine though.

I also have a Media::LicenseSerializer, and a corresponding model, which work as they should, so I don't think this is a naming issue.

Steps to Reproduce the Problem

I don't know how to reproduce this. This is just happening with one model & serializer, and I don't know why.

The method in jsonapi.rb that uses any? seem to be add_renderer!. But I'm not sure why this particular controller/serializer is acting this way. Could it be the renderer thinks it's dealing with a collection for some reason?

Right now I'm having to use render json: Media::ImageSerializer.new(@record).serializable_hash.to_json for single records, which means I can't use fields or include queries.

Specifications

• Version: 1.7.0
• Ruby version: 2.7.1

[kitsuneyo]

I was able to solve my problem by using

render jsonapi: @record, status: :ok, is_collection: false

[stas]

@kitsuneyo may I ask you what type is Media::Image?

[kitsuneyo]

@kitsuneyo may I ask you what type is Media::Image?

@stas The serialized type is 'image', it's an Active Record model

[stas]

Interesting, that could happen only if the resource you're trying to serialize is a collection:
https://github.com/stas/jsonapi.rb/blob/master/lib/jsonapi/rails.rb#L129

[kitsuneyo]

@stas Strange isn't it? It is quite a complicated model with a lot of callbacks, validations and a carrierwave uploader, something among all that is probably making it go screwy. Or I just have a typo somewhere that I can't find.

[stas]

@kitsuneyo if you have some gem/code overwriting the size or maybe each_pair methods, that could be the reason... I'll leave it open in case you find it out :)

[stas]

Should be fixed in #76