$('.tags-input').tagsinput({
      tagClass: 'label label-disc',
      maxTags: 5,
      maxChars: 8
    });
    $('.tags-input').on('beforeItemAdd', function(event){
      if(event.item.length > 8)
      {
        event.cancel = true
      }
    });
//$("select").val()	["Amsterdam","Washington","Sydney","Beijing","Cairo"]

relationalTopics: () ->
    @topics = new Lms.Collections.TopicsCollection({baseUrl: '/classes/' + current_class.id })
    @topics.fetch
      success: (collection, response, options) ->
        @relateTopicsName = collection.pluck("title")
        JSON.stringify(@relateTopicsName)

        @relateTopics = []
        for title, i in @relateTopicsName
          topic = collection.models[i]
          @relateTopics.push({ value: title , data:{ link: "forums/#{topic.get("forum_id")}/topics/#{topic.get("id")}", posts_count: topic.get("posts_count") } })

        # this is use Auto-complete plugin
        $("#thread-title").devbridgeAutocomplete
          lookup: @relateTopics
          lookupLimit: 8
          triggerSelectOnValidInput: false
          formatResult: (suggestion, currentValue) ->
            return suggestion.value + "     " + suggestion.data.posts_count + "个回答"
          onSelect: (suggestion) ->
            window.location.hash = suggestion.data.link
          onSearchComplete:  (query, suggestions) ->
            if(suggestions.length > 7)
              relationLink = encodeURI("#topics/search?q[title_or_body_cont]=" + $("#thread-title").val())
              $(".autocomplete-suggestions").append('<div class="autocomplete-suggestion" data-index=""><a href="' + relationLink + '">查看全部相关主题</a></div>')

$.alert
      confirmTitle: "确认删除",
      contentText: "是否确定删除此主题？",
      cancelBtnText: "取消",
      confirmBtnText: "确定",
      confirmFunc: () => // 确定后执行函数
        @model.destroy()
        this.remove()
        window.location.hash = 'forums/' + forum_id