如何过滤这些帖子，然后将它们添加回列表中？

Question

如何在将查询添加到posts数组之前通过检查来使这个查询工作？我收到以下错误“无法将帖子转换为数组”。我假设可能有更好的方法来查询，但我不确定如何去做。

这是在用户模型中，我在我的home_controller中调用了current_user.personal_feed，然后试图显示每个结果。

另外，我没有任何问题查询用户“朋友”的帖子只是有问题只添加通过某些参数的帖子。比如他们必须在他们/斜杠标签，并且用户还必须订阅该斜杠标签

def personal_feed 
     posts = [] 
     # cycle through all posts (of the users "friends) & check if the user wants to see them 
     Post.find(:all, :conditions => ["user_id in (?)", friends.map(&:id).push(self.id)], :order => "created_at desc").each do |post| 
     # first checkpoint: does this post contain a /slashtag 
     post.message.scan(%r{(?:^|\s+)/(\w+)}).map {|element| 
      # second checkpoint: does this user subscribe to any of these slashtags? 
      if self.subscriptions.find_by_friend_id_and_slashtag(post.user.id, element[0]) 
      posts += post 
      end 
     } 
     end 
    end 

我已经改变了代码这一点。

def personal_feed 
    posts = [] 
    # cycle through all posts (of the users "friends) & check if the user wants to see them 
    Post.find(:all, :conditions => ["user_id in (?)", friends.map(&:id).push(self.id)], :order => "created_at desc").each do |post| 
     # first checkpoint: does this post contain a /slashtag 
     post.message.scan(%r{(?:^|\s+)/(\w+)}).map {|element| 
     # second checkpoint: does this user subscribe to any of these slashtags? 
      posts << post if self.subscriptions.find_by_friend_id_and_slashtag(post.user.id, element[0]) 
     } 
    end 

末

它不会引发任何错误，但它不经过我的条件下运行的职位。即使用户朋友没有订阅该个人订阅，仍然会显示用户朋友的每篇帖子。

Answer 1

def personal_feed 
    if user_signed_in? 
     @good_friends = [] 
     current_user.friends.each do |f| 
     @good_friends << f #if some condition here 
     end 
    else 
     #cannot find friends because there is not a current user. 
     #might want to add the devise authenticate user before filter on this method 
    end 
end 

查找当前用户，然后遍历他们的朋友，只有将它们添加到数组如果xyz。

Answer 2

def personal_feed 
     posts = [] 
     # cycle through all posts (of the users "friends) & check if the user wants to see them 
     Post.find(:all, :conditions => ["user_id in (?)", friends.map(&:id).push(self.id)], :order => "created_at desc").each do |post| 
      # first checkpoint: does this post contain a /slashtag 
      post.message.scan(%r{(?:^|\s+)/(\w+)}).map {|element| 
      # second checkpoint: does this user subscribe to any of these slashtags? 
      posts << post if self.subscriptions.find_by_friend_id_and_slashtag(post.user.id, element[0]) 
      } 
     end 
     posts = posts 
    end 

工作的最终代码片段。