STI examples

sti_1a.rb

def completed_labs_count(student, canonical_repo_ids)
  if $rollout.active?(:remove_content)
    student.canonical_progresses.complete.
      joins(github_repository: :canonical_material).
      where(github_repository_id: canonical_repo_ids).
      where(kind: CourseWork::CanonicalMaterial::LAB_KINDS).
      uniq(:id).
      count
  else
    student.canonical_progresses.complete.
      joins(github_repository: :contents).
      where(github_repository_id: canonical_repo_ids).
      where(contents: { type: 'Lab' }).
      uniq(:id).
      count
  end
end