Rails 4 raw html_safe not working -

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i not able escape raw html tags in view

<% array =  @article.tags.collect { |p| (link_to p.name, '#') } %> <%= array.join(' , ') %>

raw , html_safe

<% array =  @article.tags.collect { |p| raw (link_to p.name, '#') } %> <% array =  @article.tags.collect { |p| (link_to p.name, '#').html_safe } %>

giving me output, without escaping html tags 

<a href="#">tag1</a> , <a href="#">tag2</a> , <a href="#">tag4</a>

this solved problem

<%= raw (@article.tags.map { |p| (link_to p.name, '#') }.join(' , ')) %>

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