Question

我有一个带有演示和评级的应用程序。基本思想是每个用户都可以对演示进行评分，他们可以更新评级。但是，我遇到了很多错误：

更新演示的评级
创建表单以更新评级

演示控制器

def show
    @demo = Demo.find(params[:id])
    @user = User.find(@demo.user_id)
    @topic = Subject.find(@demo.subject_id)
    if repeat_reviewer?(current_user)
        @rating = Rating.create(reviewer: current_user, reviewed: @demo)
    else
        @rating = Rating.where(reviewer: current_user, reviewed: @demo)
    end
end

....

def repeat_reviewer?(user)
    @demo = Demo.find(params[:id])
    return false unless user == User.where(reviewed: @demo)
end

def update_average_rating
    @value = 0
    self.ratings.each do |r|
        @rating += @rating.value 
    end
    @total = self.ratings.size

    update_attributes(rating_average: @value.to_f / @total.to_f)
end

评级控制器

before_action :require_user, only: [:create, :update]
after_action :update_demo_rating

def create
    @rating = Rating.create(rating_params)
    if @rating.save 
        redirect_back_or
    end
end

def update
  @rating = Rating.where(reviewer: current_user)
  if @rating.update_attributes(rating_params)
    redirect_back_or
  end
end

private

def rating_params
    params.require(:rating).permit(:value, :reviewer_id, :reviewed_id)
end

def update_demo_rating
    @rating = Rating.find(params[:id])
    @demo = @rating.reviewed
    @demo.update_average_rating
end

演示展示视图

<%= form_for @rating, url: ratings_path(@rating), method: :put do |f| %>
<%= options_for_select([[5,5],[3,3],[1,1]], 1) %>
<%= f.submit %>

我在生成表单时遇到错误，更新了正确的属性，还找到了与演示和用户相关的评级。

Rails表单从不同的控制器更新属性

0 个答案: