title: ElasticSearch field showing as bad string, causes error when searched
body: <p>I have a problem with data in elasticsearch, basically I need to store the userID that owns the documents below, I can search fine on anything aside from the userID if I view the data in sense I get a "bad string" error on the userID field.</p>
  
  <p>Whats going on? </p>
  
  <pre><code>   {"took":1,"timed_out":false,"_shards":{"total":5,"successful":5,"failed":0},"hits":{"total":3,"max_score":1.0,"hits":[{"_index":"pheme","_type":"searches","_id":"AU__X0W7bLxGTuBqZB_E","_score":1.0,"_source":{
        userID: "AU__X0W7bLxGTuBqZB_E", **&lt;---- This shows as bad string in Sense**
        mustHave: "Laravel",
        notHave: "Moogle",
        couldHave: "AngularJS",
        exclusions: {
          ID : ""
        }
      }
      },{"_index":"pheme","_type":"searches","_id":"AU__ZNA0bLxGTuBqZCCn","_score":0.30685282,"_source":{
        userID: "AU__X0W7bLxGTuBqZB_E",
        mustHave: "Laravel",
        notHave: "Moogle",
        couldHave: "AngularJS",
        exclusions: {
          ID : ""
        }
      }
      },{"_index":"pheme","_type":"searches","_id":"AVAJl5OZbMFoS2ut2YM9","_score":0.30685282,"_source":{
            userID: "AU__X0W7bLxGTuBqZB_E",
            mustHave: "Laravel",
            notHave: "Moogle",
            couldHave: "AngularJS",
            exclusions: {
              ID : ""
            }
          }
          }]}}
  </code></pre>