Question

基本要点：我目前正在尝试创建一个具有向上或向下功能的评级计数器。我创建了一个单独的模型来显示评级计数器，而计数器属于帖子。我试图创建一些Reddit甚至Stackoverflow的东西。我目前仍然坚持做什么。谢谢大家。

数据库：评级表：post_id，user_id，评级

数据库：发布表：ratings_count

评分模型

class Rating < ActiveRecord::Base
  attr_accessible :post_id, :user_id, :ratings
  has_many :post
  has_many :users

  validates :post_id, presence: true
  validates :user_id, presence: true
end

发布模型

class Post < ActiveRecord::Base
  attr_accessible :ratings_count
  belongs_to :user
  has_many :ratings

  validates :user_id, presence: true
  validates :smiles, presence: true
end

评级控制器

Nothing in it

后置控制器

class PostsController < ApplicationController

  def rate
    @post = post.find(params[:id])
    if params[:ratings_count]
      @post.ratings_count=@post.ratings_count+1
    end
  end

  def unrate

    unsure

  end
end

评级表

<%=form_for @post, :action=>"rate" do |f|%>
<%= f.hidden_field :ratings_count %>
<%=f.submit "Rate"%>
<%end%>

Answer 1

您可以使用以下内容： http://ar.rubyonrails.org/classes/ActiveRecord/Base.html#M000348

class PostsController < ApplicationController

  def rate
    Post.increment_counter(:ratings_count, params[:id]) if params[:ratings_count]
  end

  def unrate
    # You will obviously need to check for a ratings_down or something similar field in your form
    Post.decrement_counter(:ratings_count, params[:id]) if params[:ratings_count]
  end
end

Rails：升级或降级计数器第二部分

1 个答案: