title: Render different show pages with category in ruby on rails
body: <p>I need render different show pages for my blog posts.</p>
  
  <p>I have 3 different categories : themes, snippets, projects.</p>
  
  <p>Each blog post must related with those three categories.</p>
  
  <p>If anyone click post(assume related category is snippets), it display in different show...etc... It is same for other categories.</p>
  
  <p>How it is possible with conditional statements.</p>