Question

我有一个简单的评论模型和控制器。当我在我的应用程序中创建注释时，它不会检查我已分配的验证。

这是我的评论模型：

class Comment < ActiveRecord::Base
  belongs_to :post

  validates_presence_of :commenter
  validates_presence_of :body
end

这是我在控制台中创建评论时的输出：

>> comment = Comment.new
=> #<Comment id: nil, commenter: nil, body: nil, post_id: nil, email: nil, created_at: nil, updated_at: nil>
>> comment.save
=> false
>> comment.errors
=> #<OrderedHash {:body=>["can't be blank"], :commenter=>["can't be blank"]}>

一切看起来都很棒。但是，如果我在应用程序中创建一个空白注释，它只是表示它已成功创建，并且实际上并未创建注释。

这是它记录的内容：

Started POST "/posts/19/comments" for 127.0.0.1 at Tue Aug 16 23:10:26 -0400 2011
Processing by CommentsController#create as HTML
Parameters: {"comment"=>{"body"=>"", "commenter"=>"", "email"=>""}, "commit"=>"Create Comment", "authenticity_token"=>"V/EinZAi2NNYx7AokikTpQFkNtADNiauW5vcNGdhTug=", "utf8"=>"\342\234\223", "post_id"=>"19"}
Post Load (0.1ms)  SELECT "posts".* FROM "posts" WHERE "posts"."id" = 19 LIMIT 1
Redirected to http://localhost:3000/posts
Completed 302 Found in 23ms

对此有何想法？我可以添加我的实际表单代码，如果它会有任何帮助。

UPDATE 控制器代码：

class CommentsController < ApplicationController
  def create
    @post = Post.find(params[:post_id])
    @comment = @post.comments.create(params[:comment])
    flash[:notice] = "Your comment has been saved."
    redirect_to (:back)
  end
end

UPDATE 查看代码：

<%= form_for([post, post.comments.build]) do |f| %>
              <div class="field">
                <h4><%= f.label :name %></h4>
                <%= f.text_field :commenter %>
              </div>
              <div class="field">
                <h4><%= f.label :email_address %></h4>
                <%= f.text_field :email %>
              </div>
              <div class="field">
                <h4><%= f.label :body %></h4>
                <%= f.text_area :body %>
              </div>
              <div class="actions">
                <%= f.submit %>&nbsp;
                <%= link_to 'Cancel', nil, :class => 'cancel' %>
              </div>
            <% end %>

Answer 1

您必须手动检查是否有错误并显示它们。这不会以某种方式神奇地发生。

你必须改变你的控制器动作：

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

    if @comment.save
      flash[:notice] = "Your comment has been saved."
      redirect_to (:back)
    else
      render 'new'
    end
  end
end

您可以在视图中显示错误：

<%= f.error_messages %>

验证问题

1 个答案: