title: Fields based dynamic mapping elasticsearch
body: <p>Can I use wildcard pattern to determine index analyzer for elasticsearch?</p>
  
  <p>For example:
  "properties":</p>
  
  <pre><code>{ 
      "0_*" : {"type": "string", "index_analyzer": "standard" } , 
      "1_*" : {"type": "string", "index_analyzer": "my_analyzer"}
  }
  </code></pre>
  
  <p>So now if there is a new field when I index the document like</p>
  
  <pre><code>{
      "0_title" : "some string", // should use standard analyzer
      "1_title" : "my anazlyer string" // should use my_analyzer
  }
  </code></pre>
  
  <p>Is there anyway to achieve this?</p>