undefined method `bson_type' for ActionDispatch::Http::UploadedFile

[emirkin]

undefined method `bson_type' for #ActionDispatch::Http::UploadedFile:0x00000106021618

(someone else submitted the same problem at http://stackoverflow.com/questions/22143969/undefined-method-bson-type-for-actiondispatchhttpuploadedfile0x007f9450; also, there is another similar issue here at https://github.com/meskyanichi/mongoid-paperclip/issues/34)

Here's my model:

class MediaSnippet < Snippet
    include Mongoid::Paperclip

    has_mongoid_attached_file :attachment,
        path: ':attachment/:id/:style/:basename.:extension',
        storage: :s3,
        url: ':s3_alias_url',
        s3_host_alias: "#{AWS_S3[:bucket]}.s3.amazonaws.com",
        s3_permissions: :private,
        s3_credentials: "#{Rails.root}/config/s3.yml",
        bucket: AWS_S3[:bucket]
        styles: {
          original: ['1920x1680>', :jpg],
          small: ['100x100#',   :jpg],
          medium: ['250x250',    :jpg],
          large: ['500x500>',   :jpg]
        },

    validate proc { attachment.exists? }

end

class Snippet
    include Mongoid::Document
    include Mongoid::Attributes::Dynamic
    include Mongoid::Timestamps

    embedded_in :session
        ...
end

class Session
    include Mongoid::Document
    include Mongoid::Timestamps

    embeds_many :snippets, validate: false, cascade_callbacks: true
end

My specs:

GIT
  remote: git://github.com/meskyanichi/mongoid-paperclip.git
  revision: 18e9d2d50a337f347e01776201a5f36dda2934cb
  specs:
    mongoid-paperclip (0.0.9)
      paperclip (>= 2.3.6)

GIT
  remote: git://github.com/mongoid/mongoid.git
  revision: dba1c17b1dba667e50347ab616aaf6f2e1bee094
  specs:
    mongoid (4.0.0.beta1)
      activemodel (>= 4.0.0)
      moped (~> 2.0.beta6)
      origin (~> 2.1)
      tzinfo (>= 0.3.37)

GIT
  remote: git://github.com/mongoid/moped.git
  revision: e238b4a757d64d980e3137c5b57a37a1729733a9
  specs:
    moped (2.0.0.beta6)
      bson (~> 2.2)
      connection_pool (~> 1.2)
      optionable (~> 0.2.0)

paperclip (4.1.1)
rails (4.0.2)

[emirkin]

Could this be related to https://github.com/mongoid/moped/issues/200? (@durran)

[emirkin]

Found the problem. Not a bug.

In my case, the model with the paperclip attachment was subclassed from another model. So, when creating it I had to supply the right "type" class. I was supplying a wrong class. As a result, the ActionDispatch::Http::UploadedFile field was not intercepted by paperclip and instead was treated as an ordinary mongoid field. Naturally, it failed at the first attempt for serialization.

[dileeppdkr]

Hi I am getting the same problem while updating the image. What is the solution for that. my code is

 clinics  = Clinic.where(:id => doctor_clinic_params[:doc_clinic_id])
  clinics.update(:clinic_logo => doctor_clinic_params[:clinic_logo])

class Clinic include Mongoid::Document include Mongoid::Timestamps include Mongoid::Paperclip

has_mongoid_attached_file :clinic_logo, :path => ":rails_root/public/system/:attachment/:id/:style/:filename", :url => "/system/:attachment/:id/:style/:filename", :content_type => [ "image/jpg", "image/png", "image/bmp" ], :styles => { :small => "50x50", :large => "304x304" }

end

this is my code. I am getting undefined method `bson_type' for #ActionDispatch::Http::UploadedFile:0x00000001db23f0 error. Please help me. Thanks in Advance.