belong_to Post 和 belong_to User 的评论

Question

I'm trying to add comments to a Post model我正在尝试向帖子 model 添加评论

class Comment < ActiveRecord::Base
    belongs_to :post
    belongs_to :user #should this be has_one :user instead?
....

How do I set up my Comment new and creation actions to get both current_user as well as the current post?如何设置我的新评论和创建操作以同时获取 current_user 和当前帖子？

guides.rubyonrails.org suggested建议使用 guides.rubyonrails.org

Controller: Controller：

def create
    @post = Post.find(params[:post_id])
    @comment = @post.comments.create(params[:comment])
    redirect_to post_path(@post)
end

View看法

<%= form_for([@post, @post.comments.build]) do |f| %>
...

However this only seems to be aiming to associate with the post and not also the user.然而，这似乎只是为了与帖子相关联，而不是与用户相关联。 How can I set up both associations?我怎样才能建立这两个协会？

Answer 1

I assume you have a current_user() method somewhere in your controller.我假设您的 controller 中某处有一个current_user()方法。

So this should do it:所以这应该这样做：

def create
    @post = Post.find(params[:post_id])
    @comment = @post.comments.build(params[:comment])
    @comment.user = current_user
    @comment.save
    redirect_to post_path(@post)
end

Answer 2

Deradon answered the question well but I prefer to have that logic within the new comment form itself. Deradon 很好地回答了这个问题，但我更喜欢在新评论表单本身中包含该逻辑。 For example, instead of calling those variables you can have:例如，您可以不调用那些变量：

app/views/comments/_form.html.erb:应用程序/视图/评论/_form.html.erb：

<%= f.hidden_field :user_id, value: current_user.id %>
<%= f.hidden_field :post_id, value: @post.id %>

This assumes of course that your new comment form is embedded within the 'post show' page, so that @post is available:这当然假设您的新评论表单嵌入在“post show”页面中，因此 @post 可用：

app/views/posts/show.html.erb:应用程序/视图/帖子/show.html.erb：

<body>
  <%= render @post %>
  <%= render 'comments/_form' %>
</body>

This will add post_id and user_id directly into the db for a new comment.这会将 post_id 和 user_id 直接添加到数据库中以获取新评论。 Also, don't forget to make an index for those foreign keys so the database has quicker access.另外，不要忘记为这些外键创建索引，以便更快地访问数据库。 If you don't know how, google it!如果你不知道如何，谷歌它！

belong_to Post 和 belong_to User 的评论

问题描述

2 个解决方案

解决方案1
6 已采纳 2012-04-05 22:47:50

解决方案2
0 2013-12-01 21:06:12

belong_to Post 和 belong_to User 的评论

问题描述

2 个解决方案

解决方案1 6 已采纳 2012-04-05 22:47:50

解决方案2 0 2013-12-01 21:06:12

解决方案1
6 已采纳 2012-04-05 22:47:50

解决方案2
0 2013-12-01 21:06:12