instructure/canvas-lms · error · ContentUnavailable

No pageID or fileID provided

Error message

No pageID or fileID provided

What it means

StudyAssist::ContentUnavailable with message 'No pageID or fileID provided' is raised by resolve_content when neither page_id nor file_id was supplied, so there is no source content to extract text from for the LLM call. It is the terminal else branch of the page/file resolution if/elsif chain.

Solutions

1. Pass page_id: or file_id: when constructing StudyAssist for content-backed tools
2. Verify the controller/GraphQL layer maps the incoming content identifier params correctly
3. Guard the caller: only invoke StudyAssist with a content context present
4. Check params[:page_id].present? / params[:file_id].present? client-side before submitting

Example fix

// before
StudyAssist.new(course: @course, user: @user, prompt: prompt).call
// after
StudyAssist.new(course: @course, user: @user, prompt: prompt, page_id: params[:page_id], file_id: params[:file_id]).call

raise ActionController::BadRequest if params[:page_id].blank? && params[:file_id].blank?

null

begin
  StudyAssist.new(course:, user:, prompt:, page_id:, file_id:).call
rescue StudyAssist::ContentUnavailable => e
  render json: { error: e.message }, status: :bad_request
end

When it happens

Trigger: Calling StudyAssist.new(course:, user:, prompt:) without page_id: and without file_id: (both nil/blank) on a tool whose prompt matched and requires source content, then invoking #call.

Common situations: Frontend omits the content identifier when the user didn't open a page/file context; API params named differently (e.g. page_url vs page_id) so page_id arrives blank; callers testing chip-only tools but hitting a content-requiring tool.

Understand the failure class

Background: "missing required argument" and "the following required arguments were not provided": what required-argument errors mean and how to fix them — this error's family across 20 libraries.

Related errors

• tool_key
• An institutional tag category did not pass validation
• app '# ' must be one of: #
• Artifact required for assessing
• Assessment type required for assessing

AI-assisted analysis of instructure/canvas-lms@1c9f0bb801 (2026-09-15). Data as JSON: /api/errors/b673575f6844f889. Report an issue: GitHub.

Appendix: source

Thrown at app/services/study_assist.rb:146

      chips = TOOLS.each_with_object([]) do |(_, cfg), memo|
        memo << { chip: cfg[:chip_label], prompt: cfg[:chip_label] } if @course.feature_enabled?(cfg[:feature_flag])
      end
      { chips: }
    end

    # --- Content resolution ---

    def resolve_content
      page_id = @state["pageID"] || @state[:pageID]
      file_id = @state["fileID"] || @state[:fileID]

      content =
        if page_id.present?
          resolve_page(page_id)
        elsif file_id.present?
          resolve_file(file_id)
        else
          raise ContentUnavailable, "No pageID or fileID provided"
        end

      if content.text.length > MAX_CONTENT_CHARS
        raise ContentTooLarge, "Content exceeds #{MAX_CONTENT_CHARS} character limit"
      end

      content
    end

    def resolve_page(page_id)
      page = @course.wiki_pages.not_deleted.find_by(url: page_id)
      raise ContentUnavailable, "Page not found" if page.nil?
      raise ContentUnavailable, "Page access denied" unless page.grants_right?(@user, :read)

      shard_safe_key = shard_safe_cache_key_for(page)
      text = Rails.cache.fetch(text_cache_key_for(:page, shard_safe_key), expires_in: TEXT_CACHE_TTL) do
        html_to_text(page.body.to_s)
      end

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