我有一个类叫做“问题”,类似于一篇文章,每一个都可以有评论。现在的问题是,我想在索引页面上显示多个问题,并全部显示特定问题的评论以及一个小表格来发表评论,应该添加到它的问题中。基本上我已经添加了表单并完成了所有工作,除了弄清楚如何获取问题 ID 并将其传递给评论。
我也做了一个小截图:http://prntscr.com/2pjk0i
问题 Controller .rb
class QuestionsController < ApplicationController
before_action :set_question, only: [:show, :edit, :update, :destroy]
# GET /questions
# GET /questions.json
def index
@current_user ||= User.find_by_id(session[:user_id])
@questions = Question.all
end
# GET /questions/1
# GET /questions/1.json
def show
end
# GET /questions/new
def new
@question = Question.new
end
# GET /questions/1/edit
def edit
end
# POST /questions
# POST /questions.json
def create
@question = Question.new(question_params)
@current_user ||= User.find_by_id(session[:user_id])
@question.update(:user_id => @current_user.id)
respond_to do |format|
if @question.save
format.html { redirect_to @question, notice: 'Question was successfully created.' }
format.json { render action: 'show', status: :created, location: @question }
else
format.html { render action: 'new' }
format.json { render json: @question.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /questions/1
# PATCH/PUT /questions/1.json
def update
respond_to do |format|
if @question.update(question_params)
format.html { redirect_to @question, notice: 'Question was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: 'edit' }
format.json { render json: @question.errors, status: :unprocessable_entity }
end
end
end
# DELETE /questions/1
# DELETE /questions/1.json
def destroy
@question.destroy
respond_to do |format|
format.html { redirect_to questions_url }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_question
@question = Question.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def question_params
params.require(:question).permit(:title, :body)
end
end
评论 Controller .rb
class CommentsController < ApplicationController
before_action :set_comment, only: [:show, :edit, :update, :destroy]
# GET /comments
# GET /comments.json
def index
@current_user ||= User.find_by_id(session[:user_id])
@comments = Comment.all
end
# GET /comments/1
# GET /comments/1.json
def show
end
# GET /comments/new
def new
@comment = Comment.new
end
# GET /comments/1/edit
def edit
end
# POST /comments
# POST /comments.json
def create
@comment = Comment.new(comment_params)
@current_user ||= User.find_by_id(session[:user_id])
@comment.update(:user_id => @current_user.id, :question_id => ?) # What to add here to get the specific question id?
respond_to do |format|
if @comment.save
format.html { redirect_to '/', notice: 'comment was successfully created.' }
format.json { render action: 'show', status: :created, location: @comment }
else
format.html { render action: 'new' }
format.json { render json: @comment.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /comments/1
# PATCH/PUT /comments/1.json
def update
respond_to do |format|
if @comment.update(comment_params)
format.html { redirect_to '', notice: 'comment was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: 'edit' }
format.json { render json: @comment.errors, status: :unprocessable_entity }
end
end
end
# DELETE /comments/1
# DELETE /comments/1.json
def destroy
@comment.destroy
respond_to do |format|
format.html { redirect_to '' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_comment
@comment = Comment.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def comment_params
params.require(:comment).permit(:title, :body)
end
end
index.html.erb
<h1>Listing questions</h1>
<%= link_to 'New Question', new_question_path %>
<hr>
<% @questions.each do |question| %>
<!-- Author -->
<%= question.user.name %> <br>
<!-- Date -->
<%= question.created_at %> <br>
<!-- Title -->
<%= question.title %> <br>
<!-- Body -->
<%= question.body %> <br>
<%= question.id %> <br>
<!-- Comment count -->
<%= question.comments.size %> Comment <br>
<!-- Comments -->
<% question.comments.each do |comment| %>
<!-- Comment Author -->
<%= comment.user.name %> <br>
<!-- Comment Date -->
<%= comment.created_at %> <br>
<!-- Comment Body -->
<%= comment.body %> <br>
<% end %>
<%= form_for(question.comments.new) do |f| %>
<div class="field">
<%= f.label :body %><br>
<%= f.text_area :body %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
<hr>
<% end %>
预先感谢您的帮助! :)
最佳答案
form_for 需要以某种方式提交 question_id - 通过路由或通过表单。我推荐一条路线。
如果你不独立地与评论互动——如果总是有问题,那么把你的路线改成这样:
resources :questions do
resources :comments
end
然后 - 在您的表单中,您将执行此操作
<%= form_for [question, question.comments.new] do |f| %>
这将导致表单提交 (POST) 到/question/:question_id/comments,您可以从那里处理它。
在评论 Controller 中 - 您将从 params[:question_id] 中获取问题并通过 ajax 响应(响应 json)返回结果。
如果您以前没有做过,这部分仍然很棘手。如果您需要这部分的帮助,您可能会找到很好的例子或提出一个单独的问题...
关于ruby-on-rails - Ruby on Rails form_for 引用类 ID 并传递给子评论,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/21563280/