我在我的网站上有一个博客,其中有访问过的每篇博文的博客记录。我使用这个教程作为指导来设置它。将热门博文功能添加到Ruby on Rails博客
继教程中,我能得到它成立。现在我想使用计数添加一项功能,以在帖子/索引页面上列出热门帖子。
schema.rb
create_table "posts", force: true do |t|
t.string "title"
t.text "text"
t.datetime "created_at"
t.datetime "updated_at"
t.text "description"
t.string "cover_image_file_name"
t.string "cover_image_content_type"
t.integer "cover_image_file_size"
t.datetime "cover_image_updated_at"
t.string "slug"
end
add_index "posts", ["slug"], name: "index_posts_on_slug", unique: true, using: :btree
create_table "visit_details", force: true do |t|
t.integer "visit_id"
t.string "ip_address", limit: 15
t.datetime "created_at"
t.datetime "updated_at"
end
add_index "visit_details", ["ip_address"], name: "index_visit_details_on_ip_address", using: :btree
add_index "visit_details", ["visit_id"], name: "index_visit_details_on_visit_id", using: :btree
create_table "visits", force: true do |t|
t.integer "visitable_id"
t.string "visitable_type", limit: 30
t.integer "total_visits"
t.integer "unique_visits"
t.datetime "created_at"
t.datetime "updated_at"
end
add_index "visits", ["visitable_id"], name: "index_visits_on_visitable_id", using: :btree
add_index "visits", ["visitable_type"], name: "index_visits_on_visitable_type", using: :btree
post.rb
class Post < ActiveRecord::Base
has_one :visit, :as => :visitable
end
visit.rb
class Visit < ActiveRecord::Base
belongs_to :visitable, :polymorphic => true
has_many :visit_details
def self.track(obj, ip_address)
visit = Visit.find_or_create_by_visitable_id_and_visitable_type(obj.id, obj.class.name)
### check if visit is unique
unless VisitDetail.find_by_visit_id_and_ip_address(visit.id, ip_address)
visit.increment!(:unique_visits)
end
visit.increment!(:total_visits)
visit_detail = visit.visit_details.create(:ip_address => ip_address)
end
end
visit_detail.rb
class VisitDetail < ActiveRecord::Base
belongs_to :visit
end
这里就是我试图做这样的事情,添加功能,但这种不访问访问表
posts_controller.rb
class PostsController < ApplicationController
index def
@popular = Post.order('total_visits DESC').limit(5)
end
end
然后在我看来,我期待尝试这样的事情
个帖子/ index.html.erb
<div>
<h3>Popular Posts:</h3>
<ul>
<% @popular.each do |post| %>
<li><%= post.name %></li>
<% end %>
</ul>
</div>
感谢您抽出宝贵的时间来助阵。
什么是错误/问题? – ChrisBarthol
在后控制器@popular导致视图给这个错误:** PG :: UndefinedColumn:错误:列“total_visits”不存在**我试图访问访问表来获取每个职位的__total_visits__列。 – oconn
这是告诉你,你的发布表没有“total_visits”列。看看你的代码,你的“total_visits”存储在访问表中。退房http://guides.rubyonrails.org/active_record_querying.html – ChrisBarthol