instructure/canvas-lms · error · GraphQL::ExecutionError

Assignment not found

Error message

Assignment not found

What it means

create_allocation_rule#get_assignment looks up Assignment.active.find(assignment_id); if no active assignment matches, ActiveRecord::RecordNotFound is rescued and re-raised as 'Assignment not found'. Deleted/concluded (non-active) assignments are treated as nonexistent.

Solutions

1. Verify the assignment id exists and its workflow_state is active (Assignment.active scope)
2. Re-fetch assignment ids from the API instead of using cached ones
3. Check you are passing a valid Assignment relay/legacy id on the correct shard
4. If the assignment was deleted, restore it or choose another assignment

Example fix

// before
createAllocationRule(input: { assignmentId: "12" }) // assignment deleted
// after
// resolve fresh id first:
assignment = course.assignments.active.find { |a| a.name == "HW1" }
createAllocationRule(input: { assignmentId: assignment.relay_id })

const asg = await canvas.get(`/api/v1/courses/${courseId}/assignments/${assignmentId}`)
if (!asg || asg.deleted_at) throw new Error('assignment missing or deleted')

function isActiveAssignment(a) { return a != null && a.id != null && a.workflow_state === 'published' && !a.deleted_at }

try {
  await client.mutate({ mutation: CREATE_ALLOCATION_RULE, variables: { assignmentId } })
} catch (e) {
  if (e.message.includes('Assignment not found')) {
    assignmentId = await refetchActiveAssignmentId(courseId)
    // retry once with fresh id
  } else throw e
}

When it happens

Trigger: Calling createAllocationRule with an assignmentId that is deleted,soft-deleted, on a different shard, or a non-assignment id; also plain nonexistent ids.

Common situations: Client cached an assignment id that was later deleted; id passed belongs to a quiz-lti assignment not in the active scope; cross-shard id format mismatch.

Understand the failure class

Background: Record Not Found Errors: "not found", RecordNotFound, and "was not found" — what they mean and how to fix them — this error's family across 28 libraries.

Related errors

• Assignment not found
• An assignment with that id does not exist
• Course not found
• custom grade status not found
• not found

AI-assisted analysis of instructure/canvas-lms@1c9f0bb801 (2026-09-15). Data as JSON: /api/errors/ed3db926e227245f. Report an issue: GitHub.

Appendix: source

Thrown at app/graphql/mutations/create_allocation_rule.rb:78

      target_id = input[:applies_to_assessor] ? input[:assessor_ids].first : input[:assessee_ids].first
      subjects = input[:applies_to_assessor] ? input[:assessee_ids] : input[:assessor_ids]

      subjects.each do |subject_id|
        opts = {
          assessor_id: input[:applies_to_assessor] ? target_id : subject_id,
          assessee_id: input[:applies_to_assessor] ? subject_id : target_id
        }
        allocation_rules << create_or_find_new_rule(assignment, course, opts.merge(shared_opts))
      end
    end

    allocation_rules
  end

  def get_assignment(assignment_id)
    Assignment.active.find(assignment_id)
  rescue ActiveRecord::RecordNotFound
    raise GraphQL::ExecutionError, I18n.t("Assignment not found")
  end
end

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