ActiveStorage file uploading in GraphQL API in Rails

create_document.rb

# app/graphql/types/objects/document_type.rb

module Mutations
  class CreateDocument < BaseMutation

    description "creates a document for the user in the system"

    argument :doc, ApolloUploadServer::Upload, required: true

    field :document, Types::Objects::DocumentType, null: false

    def resolve(doc:)
      authenticate_user
      user = context[:current_user]
      document = user.documents.build(doc: doc)
      if document.save
        return {document: document}
      else
        raise GraphQL::ExecutionError.new(document.errors.full_messages.join(', '))
      end
    end

  end
end

document.rb

# app/models/document.rb

class Document < ApplicationRecord
  ## RELATIONSHIPS
  has_one_attached :doc
  belongs_to :documentable, polymorphic: true, optional: true
  belongs_to :user, optional: true

  ## VALIDATIONS
  validate :doc_presence, on: :create

	# This validation validates that attachment can be any image of pdf
  def doc_presence
    pattern = %r{^(image|application)/(.)+$}
    unless doc.attached? && pattern.match?(doc.attachment.blob.content_type)
      errors.add(:doc, I18n.t("errors.models.document.file_presence"))
    end
  end
end

document_type.rb

# app/graphql/types/objects/document_type.rb

module Types
  module Objects
    class DocumentType < Types::BaseObject
      field :id, Integer, null: false
      field :documentable_type, String, null: true
      field :documentable_id, Integer, null: true
      field :content_type, String, null: true
      field :url, String, null: false
      field :created_at, GraphQL::Types::ISO8601DateTime, null: false
      field :updated_at, GraphQL::Types::ISO8601DateTime, null: false

      def url
        if Rails.env.production?
          object.doc.service_url
        else
          Rails.application.routes.url_helpers.rails_blob_url(object.doc)
        end
      end

      def content_type
        if object.doc.present?
          object.doc.content_type
        else
          nil
        end
      end
    end
  end
end

Hey I am getting this error could you please help me ?????