/views/comments/_form.html.erb

Question

I do a simple blog on rails. I have a Post model and a Comment model. When you create a comment, if comment is not valid, i want to show the error. How do I do?

模式员额:

#/models/post.rb 
class Post < ActiveRecord::Base
   has_many :comments
   validates :title, :content, :presence => true
end

model Comment:

#/models/comment.rb
class Comment < ActiveRecord::Base
   belongs_to :post
   validates :name, :comment, :presence => true
end

Comments Controller

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

意见表:

/views/comments/_form.html.erb

<%= form_for([@post, @post.comments.build]) do |f| %>
  <% if @comment.errors.any?  %>
     error! 
  <% end %>
  <div class="field">
    <%= f.label :name %><br />
    <%= f.text_field :name %>
  </div>
  <div class="field">
    <%= f.label :comment %><br />
    <%= f.text_area :comment %>
  </div>
  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

/views/posts/show.html.erb

<%= render  comments/form  %>

如何从控制员评论员那里通过@comment来看待/post/show.html.erb?

Thanks in advance.

Answer 1

Put render “posts/show” und redirect_to post_path(@post) in You Comments Controller。

Answer 2

并且/或对Ryan Bates筛查计划进行考察,了解特有模式和资源:

They 2 2 2 2

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Answer 3

页: 1

class CommentsController < ApplicationController
  def create
    @post = Post.find(params[:post_id])
    @comment = @post.comments.new(params[:comment])

    if @comment.save
      redirect_to post_path(@post), notice:  Comment was successfully created. 
    else
      render action: "posts/show", error:  The comment you typed was invalid. 
    end
  end
end

并修改<代码>/views/comments/_form.html.erb第1行:

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

:

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

那么,如果无法挽救错误信息,你就应当看到错误信息。

/views/comments/_form.html.erb

/views/posts/show.html.erb

友情链接