ruby-on-rails - Rails验证或可能的路由错误

Question

我正在建立一个论坛时遇到麻烦。
我在我的评论模型中添加了一个validates:content，present:true，现在我得到了一系列错误。
我现在遇到的问题是:

仅当用户在不添加任何内容的情况下评论其OWN帖子时才会发生。如果他们在另一个用户的帖子中破坏了验证，则错误消息将正确呈现。
为什么评论验证会导致与编辑帖子路径相关的崩溃？两者不应该相关。
这是发生崩溃的页面。

<div class="conversations-content-items forum-bg">
  <div class="post-main-container post-show-border">
    <div class="post-group">
      <div class="post-header">
        <div class="post-creation-time">
          <p>Posted by: <%= @post.user.username %> at <%= @post.created_at.strftime("%l:%M %p") %></p>
        </div>
        <% if @post.user == current_user %>
          <%= link_to edit_post_path do %>
            <i class="fas fa-edit icon-shrink"></i>
          <% end %> <!-- link to edit -->
        <% end %> <!-- if @user -->
      </div>
      <div class="post-title">
        <p><%= @post.title %></p>
      </div>
      <div class="post-content">
        <p><%= @post.content %></p>
      </div>
    </div>
    <div class="post-toolbar">
      <span class="post-comment-icon">
        <img src="https://img.icons8.com/material-two-tone/24/000000/topic.png"/>
      </span>
      <span class="number-of-comments">
        <%= @post.comments.size %> <p class='ml-1'>Comments</p>
      </span>
    </div>
  </div>
  <div class="comments-container">
    <%= render 'comments/comment_form', post: @post, comment: @comment %>
    <div class="comments-display">
      <% @post.comments.each do |parent_comment| %>
        <%= render 'comments/comment', post: @post, comment: parent_comment, parent_comment: parent_comment %>
        <div class="comment-replies">
          <% parent_comment.replies.each do |reply| %>
            <%= render 'comments/comment', post: @post, comment: reply, parent_comment: parent_comment %>
          <% end %>
        </div>
      <% end %>
    </div>
  </div>
</div>

这是评论 Controller

class CommentsController < ApplicationController
  def new
    @comment = Comment.new
    authorize @comment
  end

  def create
    @post = Post.find(params[:post_id])
    @language = @post.language
    @comment = Comment.new(comment_params)
    @comment.user = current_user
    @comment.post = @post
    new_cp_total = current_user.convo_points + 2
    current_user.update(convo_points: new_cp_total)
    authorize @comment
    if @comment.save
      redirect_to post_path @post
    else
      render "posts/show", layout: "conversations"
    end
  end

  def show
    @comment = @post.comment
    authorize @comment
  end

  private

  def comment_params
    params.require(:comment).permit(:content, :post_id, :user_id, :comment_id)
  end
end

评论提交的地方

<div class="comment-form-hub">
  <%= render 'devise/shared/error_messages', resource: comment %>
  <%= form_for [post, comment] do |f| %>
    <%= f.text_field(:comment_id, value: parent_comment&.id, hidden: true) if defined?(parent_comment) %>
    <div class="post-create-comment">
      <%= f.text_area :content, placeholder: "Share your thoughts...", class: "comment-form" %>
    </div>
    <div class="post-comment-submit-wrapper">
      <%= f.submit "Comment", class: "comment-button border-glow" %>
    </div>
  <% end %>
</div>

这是路线

Rails.application.routes.draw do

  root to: 'pages#home'

  mount RailsAdmin::Engine => '/admin', as: 'rails_admin'
  post 'messages', to: 'messages#create'

  devise_for :users, controllers: {
    sessions: 'users/sessions',
    registrations: 'users/registrations'
  }

  authenticate :user, ->(user) { user.admin? } do
    mount Blazer::Engine, at: "blazer"
  end

  resources :languages, only: :index, path: "/", param: :lang do
    member do
      resources :posts, only: :index, path: 'forum', as: :forum
      resources :posts, only: :new
      resources :messages, only: :index, path: 'chat', as: :chat
    end
  end

  get '/leaderboards', controller: 'pages', action: 'leaderboards'

  post '/contact/send', controller: 'contact', action: 'send_message'

  resources :posts, only: [ :create, :show, :edit, :update ] do
    resources :comments, only: [:create, :destroy]
  end

  resources :messages, only: :create

  resources :users, only: :show

  resources :games, only: [ :show, :index ] do
    resources :plays, only: :create
  end

  # For details on the DSL available within this file, see https://guides.rubyonrails.org/routing.html
end

Answer 1

edit_post_path url帮助器必须至少接收您要编辑的帖子的ID，否则该帮助器将无法推断出如何生成该URL。
尝试以下方法:

<%= link_to edit_post_path(@post.id) do %>

多一点解释:
任何此类REST资源的url帮助器都必须具有 ID 标识符以生成URL，因此:
edit_post_path(36)将生成URL:

/posts/36/edit

edit_comment_path(8)将生成URL:

/comments/8/edit

没有ID，URL帮助程序将无法建立正确的路由:

/comments/???/edit  # would raise an error because there are no route configured for this

请注意，此资源不必一定是相关的，但是在任何 View /页面(.html.erb)中，您通过url帮助器(对于link_to，form_with，redirect_to等)呈现url时，路由都必须正确形成。