ActiveRecordは、ユーザーが破棄された後にデータベース内のユーザーを確認しています。その結果404

Question

私はActiveRecordのUserControllerにdestroyメソッドを持っています。

class Api::V1::UsersController < ApplicationController 
    skip_before_action :authorized, only: [:create, :destroy] 

    def create 
    @user = User.new(user_params) 
    if @user.save 
    token = issue_token({ user_id: @user.id}) 
    render json: { user: @user, jwt: token}, status: 201 
    else 
    render json: {message: "Username is already taken" }, status: 400 
    end 
    end 

    def show 
    @user = User.find(params[:id]) 
    render json: {user: @user}, status: 201 
    end 

    def update 
    @user = User.find(params[:id]) 
    if @user == current_user 
    @user.update_attributes(user_params) 
    render json: {user: @user}, status: 201 
    else 
    render json: {message: "Unable to update"}, status: 400 
    end 
    end 

    def destroy 
    @user = User.find(params[:id]) 
    if @user == current_user 
    @user.destroy 
    render json: {message: "Your account was deleted"}, status: 200 
    else 
    render json: {message: "You cannot delete this account"}, status: 400 
    end 
    end 


private 

    def user_params 
    params.permit(:username, :password, :image_uri, :description, :email, links: []) 
    end 

end 

私はレールのAPIへの削除要求を送信するために行くたびにActiveRecordのは、レコードが、その後最後に、それは再びユーザーを探しているを削除しません。

Started DELETE "/api/v1/users/8" for 127.0.0.1 at 2017-12-30 15:18:32 -0500 
Processing by Api::V1::UsersController#destroy as JSON 
Parameters: {"username"=>"pam", "password"=>"[FILTERED]", "email"=>"pam", "id"=>"8", "user"=>{"username"=>"pam", "email"=>"pam"}} 
User Load (1.3ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2 [["id", 8], ["LIMIT", 1]] 
User Load (1.3ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2 [["id", 8], ["LIMIT", 1]] 
(1.4ms) BEGIN 
UserFollower Load (1.4ms) SELECT "user_followers".* FROM 
"user_followers" WHERE "user_followers"."follower_id" = $1 [["follower_id", 8]] 
Story Load (1.6ms) SELECT "stories".* FROM "stories" WHERE "stories"."user_id" = $1 [["user_id", 8]] 
SQL (1.7ms) DELETE FROM "users" WHERE "users"."id" = $1 [["id", 8]] 
(2.2ms) COMMIT 
User Load (1.4ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2 [["id", 8], ["LIMIT", 1]] 
Completed 404 Not Found in 414ms (ActiveRecord: 12.3ms) 

アクティブなレコードの関連付けと関係があると思いましたか？

class User < ApplicationRecord 
validates_presence_of [:username, :email, :password_digest] 
has_secure_password 
has_many :user_followers, class_name: "UserFollower", foreign_key: "follower_id", dependent: :destroy 
has_many :followers, through: :user_followers 
has_many :stories, dependent: :destroy 
end 

これは、スタックトレースです：

/Users/Josh/.rvm/gems/ruby-2.3.4/gems/activerecord-5.1.4/lib/active_record/core.rb:189:in `find' 
/Users/Josh/dev/mediumrare-rails/app/controllers/application_controller.rb:27:in `current_user' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/active_model_serializers-0.10.6/lib/action_controller/serialization.rb:30:in `serialization_sco 
pe' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/active_model_serializers-0.10.6/lib/action_controller/serialization.rb:43:in `block in get_seri 
alizer' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/active_model_serializers-0.10.6/lib/action_controller/serialization.rb:43:in `fetch' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/active_model_serializers-0.10.6/lib/action_controller/serialization.rb:43:in `get_serializer' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/active_model_serializers-0.10.6/lib/action_controller/serialization.rb:61:in `block (2 levels) 
in <module:Serialization>' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_controller/metal/renderers.rb:149:in `block in _render_to_body_with 
_renderer' 
/Users/Josh/.rvm/rubies/ruby-2.3.4/lib/ruby/2.3.0/set.rb:306:in `each_key' 
/Users/Josh/.rvm/rubies/ruby-2.3.4/lib/ruby/2.3.0/set.rb:306:in `each' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_controller/metal/renderers.rb:145:in `_render_to_body_with_renderer 
' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_controller/metal/renderers.rb:141:in `render_to_body' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/abstract_controller/rendering.rb:24:in `render' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_controller/metal/rendering.rb:36:in `render' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_controller/metal/instrumentation.rb:44:in `block (2 levels) in rend 
er' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/activesupport-5.1.4/lib/active_support/core_ext/benchmark.rb:12:in `block in ms' 
/Users/Josh/.rvm/rubies/ruby-2.3.4/lib/ruby/2.3.0/benchmark.rb:308:in `realtime' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/activesupport-5.1.4/lib/active_support/core_ext/benchmark.rb:12:in `ms' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_controller/metal/instrumentation.rb:44:in `block in render' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_controller/metal/instrumentation.rb:87:in `cleanup_view_runtime' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/activerecord-5.1.4/lib/active_record/railties/controller_runtime.rb:29:in `cleanup_view_runtime 
' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_controller/metal/instrumentation.rb:43:in `render' 
/Users/Josh/dev/mediumrare-rails/app/controllers/api/v1/users_controller.rb:34:in `destroy' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_controller/metal/basic_implicit_render.rb:4:in `send_action' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/abstract_controller/base.rb:186:in `process_action' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_controller/metal/rendering.rb:30:in `process_action' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/abstract_controller/callbacks.rb:20:in `block in process_action' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:131:in `run_callbacks' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/abstract_controller/callbacks.rb:19:in `process_action' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_controller/metal/rescue.rb:20:in `process_action' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_controller/metal/instrumentation.rb:32:in `block in process_action' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/activesupport-5.1.4/lib/active_support/notifications.rb:166:in `block in instrument' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/activesupport-5.1.4/lib/active_support/notifications/instrumenter.rb:21:in `instrument' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/activesupport-5.1.4/lib/active_support/notifications.rb:166:in `instrument' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_controller/metal/instrumentation.rb:30:in `process_action' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_controller/metal/params_wrapper.rb:252:in `process_action' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/activerecord-5.1.4/lib/active_record/railties/controller_runtime.rb:22:in `process_action' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/abstract_controller/base.rb:124:in `process' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_controller/metal.rb:189:in `dispatch' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_controller/metal.rb:253:in `dispatch' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_dispatch/routing/route_set.rb:49:in `dispatch' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_dispatch/routing/route_set.rb:31:in `serve' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_dispatch/journey/router.rb:50:in `block in serve' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_dispatch/journey/router.rb:33:in `each' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_dispatch/journey/router.rb:33:in `serve' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_dispatch/routing/route_set.rb:834:in `call' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/rack-2.0.3/lib/rack/etag.rb:25:in `call' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/rack-2.0.3/lib/rack/conditional_get.rb:38:in `call' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/rack-2.0.3/lib/rack/head.rb:12:in `call' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/activerecord-5.1.4/lib/active_record/migration.rb:556:in `call' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_dispatch/middleware/callbacks.rb:26:in `block in call' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:97:in `run_callbacks' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_dispatch/middleware/callbacks.rb:24:in `call' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_dispatch/middleware/executor.rb:12:in `call' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_dispatch/middleware/debug_exceptions.rb:59:in `call' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_dispatch/middleware/show_exceptions.rb:31:in `call' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/railties-5.1.4/lib/rails/rack/logger.rb:36:in `call_app' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/railties-5.1.4/lib/rails/rack/logger.rb:24:in `block in call' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/activesupport-5.1.4/lib/active_support/tagged_logging.rb:69:in `block in tagged' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/activesupport-5.1.4/lib/active_support/tagged_logging.rb:26:in `tagged' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/activesupport-5.1.4/lib/active_support/tagged_logging.rb:69:in `tagged' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/railties-5.1.4/lib/rails/rack/logger.rb:24:in `call' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_dispatch/middleware/remote_ip.rb:79:in `call' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_dispatch/middleware/request_id.rb:25:in `call' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/rack-2.0.3/lib/rack/runtime.rb:22:in `call' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/activesupport-5.1.4/lib/active_support/cache/strategy/local_cache_middleware.rb:27:in `call' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_dispatch/middleware/executor.rb:12:in `call' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/actionpack-5.1.4/lib/action_dispatch/middleware/static.rb:125:in `call' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/rack-2.0.3/lib/rack/sendfile.rb:111:in `call' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/rack-cors-1.0.2/lib/rack/cors.rb:97:in `call' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/railties-5.1.4/lib/rails/engine.rb:522:in `call' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/puma-3.11.0/lib/puma/configuration.rb:225:in `call' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/puma-3.11.0/lib/puma/server.rb:624:in `handle_request' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/puma-3.11.0/lib/puma/server.rb:438:in `process_client' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/puma-3.11.0/lib/puma/server.rb:302:in `block in run' 
/Users/Josh/.rvm/gems/ruby-2.3.4/gems/puma-3.11.0/lib/puma/thread_pool.rb:120:in `block in spawn_thread' 

Answer 1

私はあなたのアプリケーションが再びCURRENT_USERをロードしようとしている想像してみてください。削除が成功した後にcurrent_userをnilに設定してみてください。

def destroy 
    @user = User.find(params[:id]) 
    if @user == current_user 
    @user.destroy 
    @current_user = nil 
    render json: {message: "Your account was deleted"}, status: 200 
    else 
    render json: {message: "You cannot delete this account"}, status: 400 
    end 
    end