title: Angualarjs smart table search particular columns
body: <p>i have used this documentation <a href="http://lorenzofox3.github.io/smart-table-website/" rel="nofollow">smart table</a></p>
  
  <pre><code>&lt;form&gt;
      &lt;label for="predicate"&gt;selected predicate:&lt;/label&gt;
      &lt;select class="form-control" id="predicate" ng-model="selectedPredicate" ng-options="predicate for predicate in predicates"&gt;&lt;/select&gt;
  &lt;/form&gt;
  &lt;table st-table="rowCollection" class="table table-striped"&gt;
      &lt;thead&gt;
      &lt;tr&gt;
          &lt;th st-sort="firstName"&gt;first name&lt;/th&gt;
          &lt;th st-sort="lastName"&gt;last name&lt;/th&gt;
          &lt;th st-sort="birthDate"&gt;birth date&lt;/th&gt;
          &lt;th st-sort="balance"&gt;balance&lt;/th&gt;
          &lt;th&gt;email&lt;/th&gt;
      &lt;/tr&gt;
      &lt;tr&gt;
          &lt;th&gt;
              &lt;input st-search="{{firstName}},{{lastName}}" placeholder="search for firstname" class="input-sm form-control" type="search"/&gt;
          &lt;/th&gt;
          &lt;th colspan="3"&gt;
              &lt;input st-search placeholder="global search" class="input-sm form-control" type="search"/&gt;
          &lt;/th&gt;
          &lt;th&gt;
              &lt;input st-search="{{selectedPredicate}}" placeholder="bound predicate" class="input-sm form-control" type="search"/&gt;
          &lt;/th&gt;
      &lt;/tr&gt;
      &lt;/thead&gt;
      &lt;tbody&gt;
      &lt;tr ng-repeat="row in rowCollection"&gt;
          &lt;td&gt;{{row.firstName | uppercase}}&lt;/td&gt;
          &lt;td&gt;{{row.lastName}}&lt;/td&gt;
          &lt;td&gt;{{row.birthDate | date}}&lt;/td&gt;
          &lt;td&gt;{{row.balance | currency}}&lt;/td&gt;
          &lt;td&gt;&lt;a ng-href="mailto:{{row.email}}"&gt;email&lt;/a&gt;&lt;/td&gt;
      &lt;/tr&gt;
      &lt;/tbody&gt;
  &lt;/table&gt;
  </code></pre>
  
  <p>i have used st-search search for particular column . it is working fine but two column not working. can you help me? i need search two column only </p>