rails无法将提交的结果保存在DB中

时间:2012-03-03 16:44:49

标签: ruby-on-rails

我有四个控制器 - 用户,类别,故事和评论。我的问题是评论。当我提交评论@ comment.save是假的,我无法理解问题出在哪里。我在DB for Comment中的表有content,user_id,story_id。这是我的代码的一部分:

def new
  @comment = Comment.new
  @story = Story.find(params[:story_id])
end

def create
  @story = Story.find(params[:story_id])
  if current_user
    @comment = current_user.comments.create(params[:comment])
  end

  if @comment.save
    flash[:success] = "Successfull added comment"
    redirect_to story_path(@story)
  else
    render 'new'
  end
end

storiesController的show.html.erb:

<b><%= @story.title %></b> <br/><br/>

<%= @story.content %> <br/><br/>

<% @story.comments.each do |comment| %>
  <b>Comment:</b>
  <%= comment.content %>
<% end %>

<%= form_for([@story, @story.comments.build]) do |f| %>
  <div class="field">
    <%= f.label :content %><br />
    <%= f.text_area :content %>
  </div>
  <div class="actions">
    <%= f.submit "Add" %>
  </div>
<% end %>

comment.rb:

class Comment < ActiveRecord::Base
  attr_accessible :content, :story_id, :user_id 
  belongs_to :story
  belongs_to :user

  validates :content, :presence => true
  validates :story_id, :presence => true
  validates :user_id, :presence => true

  default_scope :order => 'comments.created_at DESC'
end

story.rb

class Story < ActiveRecord::Base
  attr_accessible :title, :content, :category_id 
  belongs_to :user
  belongs_to :category
  has_many :comments

  validates :title, :presence => true
  validates :content, :presence => true
  validates :user_id, :presence => true

  default_scope :order => 'stories.created_at DESC'
end

更新 当我使用保存!我有一条错误消息,故事不能为空。

1 个答案:

答案 0 :(得分:1)

您需要为自己正在构建的评论设置故事(因为您显然已经解决了),有问题的故事由params[:story_id]给出。那个故事ID并没有神奇地进入params[:comment]哈希。你可以做

@comment = @story.comments.build(params[:comment])
@comment.user = current_user

或为用户创建评论,然后设置其故事。