質問編集履歴
3
Listscontrollerを記述
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end
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```
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```Ruby
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class ListsController < ApplicationController
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before_action :set_list, only: [:show, :edit, :update, :destroy]
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# GET /lists
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# GET /lists.json
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def index
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#@list = List.find(params[:id])
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@lists= List.where(user_id: current_user.id).order("start_time ASC")
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end
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# GET /lists/1
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# GET /lists/1.json
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def show
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end
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# GET /lists/new
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def new
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@list = List.new
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end
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# GET /lists/1/edit
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def edit
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end
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# POST /lists
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# POST /lists.json
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def create
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@list = List.new(list_params)
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@list.user_id = current_user.id
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#@list.tag_list.user_id = current_user.id
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respond_to do |format|
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if @list.save
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format.html { redirect_to @list, notice: 'List was successfully created.' }
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format.json { render :show, status: :created, location: @list }
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else
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format.html { render :new }
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format.json { render json: @list.errors, status: :unprocessable_entity }
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end
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end
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end
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# PATCH/PUT /lists/1
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# PATCH/PUT /lists/1.json
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def update
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respond_to do |format|
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if @list.update(list_params)
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format.html { redirect_to @list, notice: 'List was successfully updated.' }
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format.json { render :show, status: :ok, location: @list }
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else
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format.html { render :edit }
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format.json { render json: @list.errors, status: :unprocessable_entity }
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end
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end
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end
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# DELETE /lists/1
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# DELETE /lists/1.json
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def destroy
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@list.destroy
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respond_to do |format|
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format.html { redirect_to tag_lists_url, notice: 'List was successfully destroyed.' }
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format.json { head :no_content }
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end
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end
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private
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# Use callbacks to share common setup or constraints between actions.
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def set_list
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@list = List.find(params[:id])
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end
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# Never trust parameters from the scary internet, only allow the white list through.
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def list_params
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params.require(:list).permit(:content,:start_time, tag_ids:[])
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end
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end
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```
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### 補足情報(FW/ツールのバージョンなど)
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rails 5.1.7
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タイトル
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Railsで、中間テーブルのカラムに
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Railsで、中間テーブルのカラムに他のテーブルからカラムの値を参照したい
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質問文のコード部分の書き方
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### 前提・実現したいこと
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```
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Tagモデル、ListモデルをTagListモデルを中間テーブルとして関連付けしています。
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ログイン中のユーザーの作成したもののみをtag_lists_controllerで@tag_lists = TagList.where(user_id: current_user.id)とすることでtaglistsの一覧ページで表示させたいのですが、
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コマンドラインで確認したところTagList.user_idがnilになっているためうまくできません。
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なので、今回実現したいことはTagList.user_idにcurrent_user.idを代入できるようにすることです。
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各テーブルのカラムは以下のようになっています。
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```Ruby
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create_table "tags", force: :cascade do |t|
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t.string "content"
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t.datetime "created_at", null: false
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t.datetime "updated_at", null: false
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t.integer "user_id"
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end
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create_table "lists", force: :cascade do |t|
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t.string "content"
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t.datetime "created_at", null: false
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t.datetime "updated_at", null: false
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t.integer "user_id"
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t.date "start_time"
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end
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create_table "tag_lists", force: :cascade do |t|
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t.integer "tag_id"
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t.integer "list_id"
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t.datetime "created_at", null: false
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t.datetime "updated_at", null: false
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t.integer "user_id"
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t.index ["list_id"], name: "index_tag_lists_on_list_id"
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t.index ["tag_id"], name: "index_tag_lists_on_tag_id"
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end
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create_table "users", force: :cascade do |t|
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t.string "email", default: "", null: false
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t.string "encrypted_password", default: "", null: false
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t.string "reset_password_token"
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t.datetime "reset_password_sent_at"
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t.datetime "remember_created_at"
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t.datetime "created_at", null: false
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t.datetime "updated_at", null: false
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t.index ["email"], name: "index_users_on_email", unique: true
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t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true
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end
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```
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また、各モデルのアソシエーションは以下のようになっています。
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```Ruby
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class Tag < ApplicationRecord
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belongs_to :user, optional: true
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has_many :tag_lists, dependent: :destroy
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has_many :lists, :through => :tag_lists
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end
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class List < ApplicationRecord
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belongs_to :user, optional: true
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has_many :tag_lists, dependent: :destroy
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has_many :tags, :through => :tag_lists
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end
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class TagList < ApplicationRecord
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belongs_to :user, optional: true
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belongs_to :tag, optional: true
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belongs_to :list, optional: true
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end
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class User < ApplicationRecord
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has_many :diaries
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has_many :tags
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has_many :lists
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has_many :tag_lists
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end
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```
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### 発生している問題・エラーメッセージ
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エラーメッセージは表示されていません。
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コマンドラインでrails cをしてTagList.allと入力するとuser_id: nilと表示されます。
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本来はこのnilの部分にcurrent_user.id(ログイン中のユーザーのid)が入るようにしたいです。
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```
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エラーメッセージ
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```
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### 該当のソースコード
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```
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```Ruby
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class TagListsController < ApplicationController
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before_action :set_tag_list, only: [:show, :edit, :update, :destroy]
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def index
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@tag_lists = TagList.where(user_id: current_user.id)
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end
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# GET /tag_lists/1
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# GET /tag_lists/1.json
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def show
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end
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# GET /tag_lists/new
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def new
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@tag_list = TagList.new
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end
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# GET /tag_lists/1/edit
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def edit
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end
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# POST /tag_lists
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# POST /tag_lists.json
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def create
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@tag_list = TagList.new(tag_list_params)
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@tag_list.user_id = current_user.id
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#@tag_list.user_id = tag_list.list.user_id
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respond_to do |format|
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if @tag_list.save
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format.html { redirect_to @tag_list, notice: 'Tag list was successfully created.' }
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format.json { render :show, status: :created, location: @tag_list }
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else
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format.html { render :new }
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format.json { render json: @tag_list.errors, status: :unprocessable_entity }
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end
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end
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end
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# PATCH/PUT /tag_lists/1
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# PATCH/PUT /tag_lists/1.json
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def update
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respond_to do |format|
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if @tag_list.update(tag_list_params)
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format.html { redirect_to @tag_list, notice: 'Tag list was successfully updated.' }
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format.json { render :show, status: :ok, location: @tag_list }
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else
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format.html { render :edit }
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format.json { render json: @tag_list.errors, status: :unprocessable_entity }
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end
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end
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end
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# DELETE /tag_lists/1
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# DELETE /tag_lists/1.json
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def destroy
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@tag_list.destroy
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respond_to do |format|
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format.html { redirect_to tag_lists_url, notice: 'Tag list was successfully destroyed.' }
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format.json { head :no_content }
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end
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end
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private
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# Use callbacks to share common setup or constraints between actions.
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def set_tag_list
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@tag_list = TagList.find(params[:id])
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end
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# Never trust parameters from the scary internet, only allow the white list through.
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def tag_list_params
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params.require(:tag_list).permit(:tag_id, :list_id)
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end
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end
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163
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```
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21
164
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22
|
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### 試したこと
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23
165
|
|
24
|
-
ここに問題に対して試したことを記載してください。
|
25
166
|
|
26
167
|
### 補足情報(FW/ツールのバージョンなど)
|
27
168
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28
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-
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169
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+
rails 5.1.7
|