Railsでベストアンサー機能のpost_idの受け渡しができない

ベストアンサー機能を実装したら Post_id　がないと言われる

対象のエラーは以下の通りです。

バリデーションに失敗しました: Postを入力してください, Postを入力してください

     answer_id: params[:answer_id]
    )
    @star.save
    redirect_to("/posts/#{params[:post_id]}")
  end　
end

ちなみにここでは　star　はベストアンサーのことです

対象のコード

 <% @post.answers.each do |answer| %>
 <div class="posts-index-item">
   <div class="post-left">
       <%= link_to image_tag("/user_images/#{answer.user.image_name}"), "/users/#{answer.user.id}"%>
   </div>
.
.
.
.
   <div class="post-menus-right">
     <% if answer.star %>
     <i class="fas fa-medal best-answer"></i>
     <% else %>
     <%= link_to("ベストアンサーにする", "/stars/#{answer.id}/create", {method: "post"}) %>
     <% end %>
   </div>
 </div>

class Post < ApplicationRecord
   def answers
     return Answer.where(post_id: self.id).order(created_at: :desc)
   end
end

Post modelでは Answers に（post＿id: self.id)を渡しています。なので　

 <%= link_to("ベストアンサーにする", "/stars/#{answer.id}/create", {method: "post"}) %>

このリンクを踏んだ時にpost_idが star Contollerに受け渡しされるはずですが、なぜかうまくいきません。
star Contollerの中身は以下の通りです。

class StarsController < ApplicationController
  def create
    @star = Star.new(
      user_id: params[:user_id],
      post_id: params[:post_id],
      answer_id: params[:answer_id]
    )
    @star.save
    redirect_to("/posts/#{params[:post_id]}")
  end
end

Answerは　user_id と　post_id
Straは　user_id と　post_id と　answer_id を持っています。

お力を貸していただけたら幸いです。

satoshih

2020/07/21 07:21

rake routes　コマンドを実行した結果も追記していただけますか？

atage517

2020/07/21 07:29

Prefix Verb URI Pattern Controller#Action unions_create POST /unions/create(.:format) unions#create unions_new GET /unions/new(.:format) unions#new POST /unions/:id/destroy(.:format) union_users#destroy POST /unions/:id/create(.:format) union_users#create GET /unions/:id(.:format) unions#show GET /unions/:id/posts(.:format) unions#posts GET /users/:id/answers(.:format) users#answers POST /answers/:post_id/update(.:format) answers#update POST /answers/:post_id/create(.:format) answers#create POST /evaluations/:post_id/create(.:format) evaluations#create POST /evaluations/:post_id/destroy(.:format) evaluations#destroy POST /stars/:answer_id/create(.:format) stars#create GET /users/:id/likes(.:format) users#likes POST /likes/:post_id/destroy(.:format) likes#destroy POST /likes/:post_id/create(.:format) likes#create POST /users/:id/update(.:format) users#update GET /users/:id/edit_security(.:format) users#security GET /users/:id/edit(.:format) users#edit users_create POST /users/create(.:format) users#create signup GET /signup(.:format) users#new users_index GET /users/index(.:format) users#index GET /users/:id(.:format) users#show login POST /login(.:format) users#login logout POST /logout(.:format) users#logout GET /login(.:format) users#login_form posts_index_relative GET /posts/index/relative(.:format) posts#index_relative posts_index_updated_at GET /posts/index/updated_at(.:format) posts#index_updated_at posts_index GET /posts/index(.:format) posts#index posts_new GET /posts/new(.:format) posts#new GET /posts/:id(.:format) posts#show posts_create POST /posts/create(.:format) posts#create GET /posts/:id/edit(.:format) posts#edit POST /posts/:id/update(.:format) posts#update POST /posts/:id/destroy(.:format) posts#destroy GET /posts/:id/answer_edit(.:format) posts#answer_edit GET /:department/all(.:format) users#departmentall GET /:subject/alll(.:format) users#subjectall GET /:uni/index(.:format) users#uni GET /:uni/:subject/index(.:format) users#subject GET /:uni/:subject/:department/index(.:format) users#department GET / home#top rails_postmark_inbound_emails POST /rails/action_mailbox/postmark/inbound_emails(.:format) action_mailbox/ingresses/postmark/inbound_emails#create rails_relay_inbound_emails POST /rails/action_mailbox/relay/inbound_emails(.:format) action_mailbox/ingresses/relay/inbound_emails#create rails_sendgrid_inbound_emails POST /rails/action_mailbox/sendgrid/inbound_emails(.:format) action_mailbox/ingresses/sendgrid/inbound_emails#create rails_mandrill_inbound_health_check GET /rails/action_mailbox/mandrill/inbound_emails(.:format) action_mailbox/ingresses/mandrill/inbound_emails#health_check rails_mandrill_inbound_emails POST /rails/action_mailbox/mandrill/inbound_emails(.:format) action_mailbox/ingresses/mandrill/inbound_emails#create rails_mailgun_inbound_emails POST /rails/action_mailbox/mailgun/inbound_emails/mime(.:format) action_mailbox/ingresses/mailgun/inbound_emails#create rails_conductor_inbound_emails GET /rails/conductor/action_mailbox/inbound_emails(.:format) rails/conductor/action_mailbox/inbound_emails#index POST /rails/conductor/action_mailbox/inbound_emails(.:format) rails/conductor/action_mailbox/inbound_emails#create new_rails_conductor_inbound_email GET /rails/conductor/action_mailbox/inbound_emails/new(.:format) rails/conductor/action_mailbox/inbound_emails#new edit_rails_conductor_inbound_email GET /rails/conductor/action_mailbox/inbound_emails/:id/edit(.:format) rails/conductor/action_mailbox/inbound_emails#edit rails_conductor_inbound_email GET /rails/conductor/action_mailbox/inbound_emails/:id(.:format) rails/conductor/action_mailbox/inbound_emails#show PATCH /rails/conductor/action_mailbox/inbound_emails/:id(.:format) rails/conductor/action_mailbox/inbound_emails#update PUT /rails/conductor/action_mailbox/inbound_emails/:id(.:format) rails/conductor/action_mailbox/inbound_emails#update DELETE /rails/conductor/action_mailbox/inbound_emails/:id(.:format) rails/conductor/action_mailbox/inbound_emails#destroy rails_conductor_inbound_email_reroute POST /rails/conductor/action_mailbox/:inbound_email_id/reroute(.:format) rails/conductor/action_mailbox/reroutes#create rails_service_blob GET /rails/active_storage/blobs/:signed_id/*filename(.:format) active_storage/blobs#show rails_blob_representation GET /rails/active_storage/representations/:signed_blob_id/:variation_key/*filename(.:format) active_storage/representations#show rails_disk_service GET /rails/active_storage/disk/:encoded_key/*filename(.:format) active_storage/disk#show update_rails_disk_service PUT /rails/active_storage/disk/:encoded_token(.:format) active_storage/disk#update rails_direct_uploads POST /rails/active_storage/direct_uploads(.:format) active_storage/direct_uploads#create

atage517

2020/07/21 07:29

satoshih さんありがとうございます rake routes の結果は以上になります

行動規範の内容に同意します

回答1件

ベストアンサー

ソースを見る限り、user_idとpost_idをリクエスト時に送っていないように見えます。

修正案１ post_idとuser_idをanswerから取得する。

diff
1class StarsController < ApplicationController
2  def create
3+   answer = Answer.find(params[:answer_id])
4    @star = Star.new(
5-     user_id: params[:user_id],
6-     post_id: params[:post_id],
7+     user_id: answer.user.id,
8+     post_id: answer.post.id,
9      answer_id: params[:answer_id]
10    )
11
12
13    @star.save
14    redirect_to("/posts/#{params[:post_id]}")
15  end
16end

※answerに対してpostとuserが一つずつ紐付いている想定で書いてます。

修正案２　リクエストパラメータにuser_idとpost_idを含める。

<%= link_to("ベストアンサーにする", "/stars/#{answer.id}/create", {method: "post"}) %>

を

<%= link_to("ベストアンサーにする", "/stars/#{answer.id}/create", method: "post",  params: { user_id: answer.user.id, post_id: @post.id}) %>

のようにし、paramsにuser_idとpost_idを含める。

投稿2020/07/21 07:50

satoshih

総合スコア799

atage517

2020/07/21 08:24

できました！！！ありがとうございます！！！本当に感謝します。最後に一つ質問なのですが answer = Answer.find(params[:answer_id]) とは何かの省略の形でしょうか？たまにこのような書き方を見るのですが　Progateで習った際にはいつも answer = Answer.find_by(id: params[:answer_id])のような書き方をしていました。