json.discipline do
  json.(@item.sub_discipline&.discipline, :id, :name)
end
json.sub_discipline do
  json.(@item.sub_discipline, :id, :name)
end
json.tag_disciplines @item.tag_disciplines do |tag|
  json.(tag, :id, :name)
end
json.(@item, :id, :name, :item_type, :difficulty)
json.analysis @item.analysis
json.choices @item.item_choices do |choice|
  json.choice_text choice.choice_text
  json.is_answer choice.is_answer
end