由于我是Rails的新手，所以为这个有点无知的问题道歉很多。当前，我正在尝试为任务管理器设置一个clickable标签链接，当您单击一个标签时，它将链接到所有带有标签的任务。但是，当我实现用于用户身份验证和任务（文章）的嵌套资源模型时，我不知道如何修改代码，以便将user_id参数传递给标签链接。任何帮助将不胜感激。谢谢！
这是错误。
ActiveRecord::RecordNotFound in ArticlesController#index
Couldn't find User without an ID
# Confirms the correct user
def correct_user
@user = User.find(params[:user_id])
redirect_to(root_url) unless current_user?(@user)
end
end
Request
Parameters:
{"tag"=>"Hello"}
Routes.rb
Rails.application.routes.draw do
get 'sessions/new'
get 'welcome/index'
get '/signup', to: 'users#new'
post '/signup', to: 'users#create'
get '/login', to: 'sessions#new'
post '/login', to: 'sessions#create'
delete '/logout', to: 'sessions#destroy'
resources :users do
resources :articles
end
get 'tags/:tag', to: 'articles#index', as: :tag, :constraints => { :tag => /[^\/]+/ }
root 'welcome#index'
end
Schema.rb
ActiveRecord::Schema.define(version: 2019_01_27_035546) do
# These are extensions that must be enabled in order to support this database
enable_extension "plpgsql"
create_table "articles", force: :cascade do |t|
t.string "title"
t.text "text"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.bigint "user_id"
t.index ["user_id"], name: "index_articles_on_user_id"
end
create_table "taggings", force: :cascade do |t|
t.bigint "tag_id"
t.bigint "article_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["article_id"], name: "index_taggings_on_article_id"
t.index ["tag_id"], name: "index_taggings_on_tag_id"
end
create_table "tags", force: :cascade do |t|
t.string "name"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "users", force: :cascade do |t|
t.string "name"
t.string "email"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.string "password_digest"
t.string "remember_digest"
t.index ["email"], name: "index_users_on_email", unique: true
end
add_foreign_key "articles", "users"
add_foreign_key "taggings", "articles"
add_foreign_key "taggings", "tags"
end
文章索引视图
<% @articles.each do |article| %>
<tr>
<td><%= article.title %></td>
<td><%= article.text %></td>
<td><%= raw article.tags.map(&:name).map { |t| link_to t, tag_path(t) }.join(', ') %></td>
<td><%= link_to 'Show', user_article_path(user_id: article.user.id, id: article.id) %></td>
<td><%= link_to 'Edit', edit_user_article_path(user_id: article.user.id, id: article.id) %></td>
<td><%= link_to 'Destroy', user_article_path(user_id: article.user.id, id: article.id),
method: :delete,
data: { confirm: 'Are you sure?' } %></td>
会话控制器
class SessionsController < ApplicationController
def new
end
def create
user = User.find_by(email: params[:session][:email].downcase)
if user && user.authenticate(params[:session][:password])
# Log the user in and redirect to the user's show page.
log_in user
params[:session][:remember_me] == '1' ? remember(user) : forget(user)
redirect_back_or user
else
flash.now[:danger] = 'Invalid email/password combination'
render 'new'
end
end
def destroy
log_out if logged_in?
redirect_to root_url
end
end
会话助手
module SessionsHelper
# Logs in the given user.
def log_in(user)
session[:user_id] = user.id
end
# Remembers a user in a persistent session.
def remember(user)
user.remember
cookies.permanent.signed[:user_id] = user.id
cookies.permanent[:remember_token] = user.remember_token
end
# Returns true if the given user is the current user.
def current_user?(user)
user == current_user
end
# Returns the current logged-in user (if any).
def current_user
if session[:user_id]
@current_user ||= User.find_by(id: session[:user_id])
end
end
# Returns true if the user is logged in, false otherwise.
def logged_in?
!current_user.nil?
end
# Forgets a persistent session.
def forget(user)
user.forget
cookies.delete(:user_id)
cookies.delete(:remember_token)
end
# Logs out the current user.
def log_out
session.delete(:user_id)
@current_user = nil
end
# Redirects to stored location (or to the default).
def redirect_back_or(default)
redirect_to(session[:forwarding_url] || default)
session.delete(:forwarding_url)
end
# Stores the URL trying to be accessed.
def store_location
session[:forwarding_url] = request.original_url if request.get?
end
end
Arcticles控制器
class ArticlesController < ApplicationController
before_action :correct_user
def index
@user = User.find(params[:user_id])
@articles = if params[:term]
@user.articles.includes(:tags).where("articles.title LIKE :search OR tags.name LIKE :search", search: "%#{params[:term]}%" ).references(:tags)
else
@user.articles.all
end
end
# if params[:tag]
# @articles = @user.articles.tagged_with(params[:tag])
# else
# @articles = @user.articles.all
# end
def show
@user = User.find(params[:user_id])
@article = @user.articles.find(params[:id])
end
def new
@user = User.find(params[:user_id])
@article = @user.articles.new
end
def edit
@user = User.find(params[:user_id])
@article = @user.articles.find(params[:id])
end
def create
@user = User.find(params[:user_id])
@article = @user.articles.new(article_params)
if @article.save
redirect_to user_articles_url
else
render 'new'
end
end
def update
@user = User.find(params[:user_id])
@article = @user.articles.find(params[:id])
if @article.update(article_params)
redirect_to user_articles_path
else
render 'edit'
end
end
def destroy
@user = User.find(params[:user_id])
@article = @user.articles.find(params[:id])
@article.destroy
redirect_to user_articles_path
end
private
def article_params
params.require(:article).permit(:title, :text, :tag_list, :term)
end
# Confirms a logged_in user_
def logged_in_user
unless logged_in?
store_location
flash[:danger] = "Please log in."
redirect_to login_url
end
end
# Confirms the correct user
def correct_user
@user = User.find(params[:user_id])
redirect_to(root_url) unless current_user?(@user)
end
end