instructure/canvas-lms · error · ActiveRecord::RecordNotFound

Couldn't find assignment with API id '#

Error message

Couldn't find assignment with API id '#{params[:assignment_id]}'

What it means

Guard in GradeChangeAuditApiController#for_assignment: api_find couldn't resolve an active Assignment for params[:assignment_id] (or its context/root account or course authorization check failed), so an audit query is refused with RecordNotFound. Avoids leaking assignment existence across accounts.

Solutions

1. Use a valid assignment id visible to the current root account
2. Ensure the requesting admin is authorized on the assignment's course (course_authorized?)

When it happens

Trigger: Thrown at app/controllers/grade_change_audit_api_controller.rb:144 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of instructure/canvas-lms@1c9f0bb801 (2026-09-15). Data as JSON: /api/errors/bf5a7fe5888449d1. Report an issue: GitHub.

Appendix: source

Thrown at app/controllers/grade_change_audit_api_controller.rb:144

  include Api::V1::GradeChangeEvent

  # @API Query by assignment
  #
  # List grade change events for a given assignment.
  #
  # @argument start_time [DateTime]
  #   The beginning of the time range from which you want events.
  #
  # @argument end_time [DateTime]
  #   The end of the time range from which you want events.
  #
  # @returns [GradeChangeEvent]
  #
  def for_assignment
    @assignment = api_find(Assignment.active, params[:assignment_id])

    unless @assignment.context.root_account == @domain_root_account && course_authorized?(@assignment.course)
      raise ActiveRecord::RecordNotFound, "Couldn't find assignment with API id '#{params[:assignment_id]}'"
    end

    events = Auditors::GradeChange.for_assignment(@assignment, query_options)
    render_events(events, polymorphic_url([:api_v1, :audit_grade_change, @assignment]))
  end

  # @API Query by course
  #
  # List grade change events for a given course.
  #
  # @argument start_time [DateTime]
  #   The beginning of the time range from which you want events.
  #
  # @argument end_time [DateTime]
  #   The end of the time range from which you want events.
  #
  # @returns [GradeChangeEvent]
  #

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