title: Exclude a field on a Elasticsearch query
body: <p>Having the following mapping:</p>
  
  <pre><code>curl -XPUT 'localhost:9200/testidx?pretty=true' -d '{
    "mappings": {
      "items": {
         "dynamic": "strict",
         "properties" : {
              "title" : { "type": "string" },
              "body" : { "type": "string" }
  }}}}'
  </code></pre>
  
  <p>I put two items on it:</p>
  
  <pre><code>curl -XPUT 'localhost:9200/testidx/items/1' -d '{
    "title": "Titulo anterior",
    "body": "blablabla blablabla blablabla blablabla blablabla blablabla"
  }'
  
  curl -XPUT 'localhost:9200/testidx/items/2' -d '{
    "title": "Joselr",
    "body": "Titulo stuff more stuff" 
  }'
  </code></pre>
  
  <p>Now I want to search the word <code>titulo</code> on every field but <code>body</code>, so what I do is (following <a href="https://stackoverflow.com/a/32320770/742269">this</a> post):</p>
  
  <pre><code>curl -XGET 'localhost:9200/testidx/items/_search?pretty=true' -d '{
      "query" : {
           "query_string": {
                "query": "Titulo"
           }},
           "_source" : {
                "exclude" : ["*.body"]
           }
      }'
  </code></pre>
  
  <p>It's supposed to show only the <code>1</code> item, as the second one has the word <code>Titulo</code> but it's on the <code>body</code> and that's what I want to ignore. How can archive this?</p>
  
  <p>PS: This is just a simple example, I've a mapping with a lot of properties and I want to ignore some of them in some searches. <br>
  PS2: I'm using ES 2.3.2</p>