这是我遇到的错误
AnswerController＃results缺少此请求格式的模板 和变体。 request.formats：[“ text / html”] request.variant：[]注意！ 对于XHR / Ajax或API请求，此操作通常会以 204 No Content：空白屏幕。由于您正在将其加载到 网络浏览器，我们假设您期望实际渲染一个 模板，不是什么，所以我们显示的错误非常清楚。如果 您希望204没有内容，继续。那就是你将从 XHR或API请求。试一试。
我不确定“缺少模板”是什么意思。我也不确定为什么会出现此错误。我将提供我认为可能与此问题相关的所有代码。
answer_controller.rb
class AnswerController < ApplicationController
def create
@answer = current_quiz.answers.create(question_id: question, choice_id: choice)
redirect_to question_quiz_path(current_quiz)
end
def results
@choices = choices_hash
@results = questions.map do |question|
{
question.question => CountChoicesService.call(question.id)
}
end
end
private
def question
@question ||= params[:question]
end
def choice
@choice ||= params[:choice]
end
def choices
@choices ||= Array.wrap(Choice.all)
end
def choices_hash
choices_hash = {}
choices.each { |choice| choices_hash[choice.id] = choice.choice }
choices_hash
end
def questions
@questions ||= Array.wrap(Question.all)
end
end
count_choices_service.rb
class CountChoicesService
def self.call(question_id)
new(question_id).call
end
def call
only_finished.to_a
end
private
attr_reader :question_id
def initialize(question_id)
@question_id = question_id
end
def count_choices_by_question
Answer
.select("COUNT(choice_id), choice_id")
.where(question_id: question_id)
.group(:choice_id)
.order(:choice_id)
end
def only_finished
count_choices_by_question.where(answers: { quiz_id: quiz_ids })
end
def finished_quizzes
Quiz.finished
end
def quiz_ids
@quiz_ids = finished_quizzes.map(&:id)
end
end
application_controller.rb
class ApplicationController < ActionController::Base
protect_from_forgery with: :exception
protected
def check_existing_quiz!
redirect_to question_quiz_path(current_quiz) if current_quiz.present?
end
def check_finished_quiz!
redirect_to results_answer_index_path if quiz_finished?
redirect_to new_quiz_path unless current_quiz.present?
end
private
def current_quiz
@current_quiz ||= session[:current_quiz] && Quiz.find_by(id: session[:current_quiz])
end
def quiz_finished?
current_quiz.present? && !current_quiz.is_active
end
end
quiz_controller.rb
class QuizController < ApplicationController
before_action :check_existing_quiz!, only: [:new, :create]
before_action :check_finished_quiz!, only: [:question]
def new
@quiz = Quiz.new
end
def create
@quiz = Quiz.create(is_active: true)
session[:current_quiz] = @quiz.id
redirect_to question_quiz_path(@quiz)
end
def question
@question = NextQuestionService.next(current_quiz)
if @question
@answer = Answer.new
else
current_quiz.update_attribute(:is_active, false)
redirect_to results_answer_index_path
end
end
end
seeds.rb
Question.destroy_all
Choice.destroy_all
data_file = Rails.root.join('db', 'data.json')
collection = JSON.parse(File.read(data_file))['questions']
collection.each do |item|
question = Question.create!(question: item['question'])
item['choices'].each do |choice|
question.choices.create!(choice: choice)
end
end
p "Created #{Question.count} questions"
p "Created #{Choice.count} choices"
data.json
{
"questions": [
{
"question": "Who is Luke Skywalker’s dad?",
"choices": ["French Montana", "Anakin Skywalker", "The Dude"]
},
{
"question": "Which is the only film of the original six in which desert planet Tatooine doesn’t appear?",
"choices": ["The Last Jedi", "Revenge of the Sith", "The Empire Strikes Back"]
},
{
"question": "Who kills Jabba The Hutt?",
"choices": ["Princess Leia", "Frodo", "Han Solo"]
},
{
"question": "What was Luke Skywalker’s original surname?",
"choices": ["Starkiller", "The Phantom", "Arnold Schwarzenegger"]
},
{
"question": "What planet do Wookiees come from?",
"choices": ["Venus", "Jupiter", "Kashyyk"]
}
]
}
schema.rb
ActiveRecord::Schema.define(version: 2018_09_05_120106) do
create_table "answers", force: :cascade do |t|
t.integer "quiz_id"
t.integer "question_id"
t.integer "choice_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["choice_id"], name: "index_answers_on_choice_id"
t.index ["question_id"], name: "index_answers_on_question_id"
t.index ["quiz_id"], name: "index_answers_on_quiz_id"
end
create_table "choices", force: :cascade do |t|
t.text "choice"
t.integer "question_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["question_id"], name: "index_choices_on_question_id"
end
create_table "questions", force: :cascade do |t|
t.text "question"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "quizzes", force: :cascade do |t|
t.boolean "is_active"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
end
routes.rb
Rails.application.routes.draw do
# For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
resources :quiz, only: [:new, :create] do
member do
get 'question'
end
end
resources :answer, only: [:create] do
collection do
get 'results'
end
end
root to：'quiz＃question'
获取'* path'=> redirect（'/'） 结束
服务器日志
ActionController::UnknownFormat (AnswerController#results is missing a template for this request format and variant.
request.formats: ["text/html"]
request.variant: []
NOTE! For XHR/Ajax or API requests, this action would normally respond with 204 No Content: an empty white screen. Since you're loading it in a web browser, we assume that you expected to actually render a template, not nothing, so we're showing an error to be extra-clear. If you expect 204 No Content, carry on. That's what you'll get from an XHR or API request. Give it a shot.
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actionpack (5.2.1) lib/action_controller/metal/basic_implicit_render.rb:6:in `tap'
actionpack (5.2.1) lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
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actionpack (5.2.1) lib/action_dispatch/journey/router.rb:52:in `block in serve'
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activesupport (5.2.1) lib/active_support/callbacks.rb:98:in `run_callbacks'
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activesupport (5.2.1) lib/active_support/tagged_logging.rb:28:in `tagged'
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我已经在这个问题上坚持了很长时间，但找不到与我的问题有关的任何答案。