title: angular ui.grid search by field
body: <p>If I turn off enableFilter and roll my own input fields to search through the grid, how do I search only by one column?</p>
  
  <p>See my <a href="http://plnkr.co/edit/5V5nj7Nt1Fp7nFG2HVE9?p=preview" rel="nofollow noreferrer">plunker</a></p>
  
  <pre><code>    $scope.searchGrid = function(searchTerm){
      console.log("Term: " + searchTerm);
      $scope.gridOptions.data = $filter('filter')(myData, searchTerm, undefined);
    } 
  </code></pre>
  
  <p>I want to have multiple input fields and send in the filter to each column as needed.</p>