【发布时间】:2016-01-24 14:37:23
【问题描述】:
我正在创建一个允许用户创建帖子并向其添加标签的 Rails 应用程序。我正在尝试实现一个搜索栏,它可以搜索标签并通过显示包含用户搜索过的标签的所有帖子来过滤结果。我已经安装了acts_as_taggable_on gem。
这是我的 Post 模型,我正在尝试实现目前不起作用的搜索方法:
class Post < ActiveRecord::Base
belongs_to :user
acts_as_taggable
def self.search(search)
where("tag_list LIKE", "%#{search}")
end
end
这是我的带有索引方法和私有方法的 Post 控制器:
class PostsController < ApplicationController
before_action :set_post, only: [:show, :edit, :update, :destroy, :upvote]
before_filter :authenticate_user!, except: [:index, :show]
def index
if params[:search]
@posts = Post.search(params[:search]).order("created_at DESC")
else
@posts = Post.all
end
end
private
def set_post
@post = Post.find(params[:id])
end
def post_params
params.require(:post).permit(:title, :content, :tag_list, :user_id)
end
end
这就是我在视图中实现搜索表单的方式:
<%= form_tag(posts_path, :method => 'get', id: "search-form") do %>
<%= text_field_tag :search,params[:search], placeholder: "Search Tags" %>
<%= submit_tag "Search" %>
<% end %>
迁移(全部由acts_as_taggable_on gem 创建):
class CreatePosts < ActiveRecord::Migration
def change
create_table :posts do |t|
t.string :title
t.text :content
t.timestamps null: false
end
end
end
class ActsAsTaggableOnMigration < ActiveRecord::Migration
def self.up
create_table :tags do |t|
t.string :name
end
create_table :taggings do |t|
t.references :tag
t.references :taggable, polymorphic: true
t.references :tagger, polymorphic: true
t.string :context, limit: 128
t.datetime :created_at
end
add_index :taggings, :tag_id
add_index :taggings, [:taggable_id, :taggable_type, :context]
end
def self.down
drop_table :taggings
drop_table :tags
end
end
class AddMissingUniqueIndices < ActiveRecord::Migration
def self.up
add_index :tags, :name, unique: true
remove_index :taggings, :tag_id
remove_index :taggings, [:taggable_id, :taggable_type, :context]
add_index :taggings, [:tag_id, :taggable_id, :taggable_type, :context, :tagger_id, :tagger_type], unique: true, name: 'taggings_idx'
end
def self.down
remove_index :tags, :name
remove_index :taggings, name: 'taggings_idx'
add_index :taggings, :tag_id
add_index :taggings, [:taggable_id, :taggable_type, :context]
end
end
class AddTaggingsCounterCacheToTags < ActiveRecord::Migration
def self.up
add_column :tags, :taggings_count, :integer, default: 0
ActsAsTaggableOn::Tag.reset_column_information
ActsAsTaggableOn::Tag.find_each do |tag|
ActsAsTaggableOn::Tag.reset_counters(tag.id, :taggings)
end
end
def self.down
remove_column :tags, :taggings_count
end
end
class AddMissingTaggableIndex < ActiveRecord::Migration
def self.up
add_index :taggings, [:taggable_id, :taggable_type, :context]
end
def self.down
remove_index :taggings, [:taggable_id, :taggable_type, :context]
end
end
class ChangeCollationForTagNames < ActiveRecord::Migration
def up
if ActsAsTaggableOn::Utils.using_mysql?
execute("ALTER TABLE tags MODIFY name varchar(255) CHARACTER SET utf8 COLLATE utf8_bin;")
end
end
end
【问题讨论】:
-
您能否将服务器日志中生成的参数和 ActiveRecord 调用发布到问题中?
标签: ruby-on-rails ruby ruby-on-rails-4 acts-as-taggable-on