Question

我正在尝试在rails中为用户创建一个评论系统。我希望一个用户能够在设备的个人资料页面上为另一个用户评分。我已经尝试了一些不同的方法，但我对rails很新，但却无法实现这一目标。

现在我有默认设计视图，但没有用户个人资料页面。我希望用户在5个左右的不同问题上审核另一个用户。

非常感谢任何帮助！

Answer 1

为此，您可以使用名为has_many through关联的关联： http://guides.rubyonrails.org/association_basics.html#the-has-many-through-association

你的模型应该看起来像那样“

class User < ActiveRecord::Base
  has_many :rates
  has_many :rated_users, through: :rates, class_name: "User", foreign_key: :rated_user_id # The users this user has rated
  has_many :rated_by_users, through: :rates, class_name: "User", foreign_key: :rating_user_id # The users that have rated this client
end

class Rates < ActiveRecord::Base
  belongs_to :rating_user, class_name: "User"
  belongs_to :rated_user, class_name: "User"
end

您的迁移：

class createRates < ActiveRecord::Migration


  def change
    create_table :changes do |t|
      t.belongs_to :rated_user
      t.belongs_to :rating_user
      t.integer :value
      t.timestamps
    end
  end
end

Answer 2

Oxynum - 很棒的概念！添加模型并应用迁移后，从模板开始。您的起点是users_controller.rb。也许，你已经在UsersController中有一个'show'动作。此操作适用于经过身份验证的用户。将此操作修改为如：

class UsersController < ApplicationController
  before_filter :authenticate_user!
  before_filter :load_ratable, :only => [:show, :update_rating] 

  def show        
    # Renders app/views/users/show.html.erb with user profile and rate controls
  end

  def update_rating        
    my_rate_value = params[:value] == 'up' ? +1 : -1        
    if  @rated_by_me.blank?
      Rate.create(rated_user: @userProfile, rating_user: @user, value: my_rate_value)
      flash[:notice] = "You rated #{@userProfile.name}: #{params[:value]}"
    else
      flash[:notice] = "You already rated #{@userProfile.name}" 
    end
    render action: 'show'
  end

  protected:
    def load_ratable
      @userProfile = User.find(params[:id]) # - is a viewed profile.
      @user = current_user                  # - is you
      @rated_by_me = Rate.where(rated_user: @userProfile, rating_user: @user)
    end
end

添加到路线：

get 'users/update_rating/:value' => 'user#update_rating'

启动rails服务器，登录，然后尝试直接更改评级：

  http://localhost:3000/users/update_rating/up

在Rails中设计用户评论/评级系统4

2 个答案: