解析 @username 的帖子

我建立了一个类似 Twitter 的@replies，允许用户通过用户每日帖子相互联系......类似于 stackoverflow。

以此作为指导https://github.com/kltcalamay/sample_app/compare/original-version...master https://github.com/kltcalamay/sample_app/compare/original-version...master

如何解析/扫描帖子，然后将 @usernames 替换为该用户页面的链接

帖子示例。

Kevins Post:
 @Pzpcreations @john @steve hey everyone lets all hang out today

我想扫描/解析该帖子，然后将用户 @Pzpcreations @john @steve 链接到他们的个人资料

我尝试在 Dailypost 模型中创建一个方法，将用户名存储在数组中......但不知道如何替换它们并将它们链接到适当的用户页面

def username_link
  str = self.content_html
  recipient = str.scan(USERNAME_REGEX)
end

这给了我 [“@Pzpcreations”，“@john”，“@steve”]

请帮助我....rails 新手:)

MODELS

class Recipient < ActiveRecord::Base
  attr_accessible :dailypost_id, :user_id

  belongs_to :user
  belongs_to :dailypost

end

class User < ActiveRecord::Base
  attr_accessible :name, :email, username

  has_many :dailyposts, dependent: :destroy

  has_many :replies, :class_name => 'Recipient', :dependent => :destroy
  has_many :received_replies, :through => :replies, :source => 'dailypost'

end

class Dailypost < ActiveRecord::Base  
  attr_accessible :content, :recipients
  belongs_to :user

  ###What is the Correct REGEX for Rails 4?
  USERNAME_REGEX = /@\w+/i

  has_many :recipients, dependent: :destroy
  has_many :replied_users, :through => :recipients, :source => "user"

  after_save :save_recipients

  **private**

    def save_recipients
      return unless reply?

      people_replied.each do |user|
        Recipient.create!(:dailypost_id => self.id, :user_id => user.id)
      end
    end

    def reply?
      self.content.match( USERNAME_REGEX )
    end

    def people_replied
      users = []
      self.content.clone.gsub!( USERNAME_REGEX ).each do |username|
        user = User.find_by_username(username[1..-1])
        users << user if user
      end
      users.uniq
    end
end

SCHEMA

create_table "recipients", :force => true do |t|
  t.string   "user_id"
  t.string   "dailypost_id"
  t.datetime "created_at",   :null => false
  t.datetime "updated_at",   :null => false
end

[#<Recipient id: 7, **user_id: "103"**, dailypost_id: "316", created_at: "2013-06-18 
10:31:16", updated_at: "2013-06-18 10:31:16">]

User_ID in recipients are the users that are mentioned in the Dailypost.

VIEWS

<%= link_to dailypost.username_link %>

您可以将每场比赛传递到一个块。 在此块中，您返回所需的链接，例如

def username_link
  str = self.content_html
  str.gsub!(USERNAME_REGEX).each do |recipient|
    if User.find_by_name(recipient) 
      "[link to #{recipient}]"
     else 
       recipient
     end
  end
end

Edit

在中创建一个辅助函数app/helpers/posts_helper.rb

def post_with_links(post)
  post.content_html.gsub(/@\w+/).each do |username|
    user = User.find_by_username(username[1..-1])
    if user
      link_to username, user
    else
      username
    end
end

在你看来使用这个

<%= post_with_links(post) %>