filter multiple fields using single input in AngularJS

Considering that your user have this form:

{
  "id": 2,
  "firstName": "Angelina",
  "middleName": null,
  "lastName": "Jolie",
  "address": "Beverley Hills"
}

If you want to search one of your user by his firstname, his lastname or both at the same time, you need to concat them together.

$scope.query = '';

$scope.search = function (user) {
  var query = $scope.query.toLowerCase(),
  fullname = user.firstName.toLowerCase() + ' ' + user.lastName.toLowerCase();

  if (fullname.indexOf(query) != -1) {
    return true;
  }
  return false;
};

This function will return true if the current user satisfies your query and false if not. Inside of the function, I recommend to put your query in lowercases so you won't have to deal with the uppercases your user will enter in the search input.

Here is the HTML:

<input type="text" placeholder="Search" ng-model="query">
<table>
   <tr ng-repeat="user in users | filter:search">
      <td>{{user.firstName}} {{user.lastName}}</td>
   </tr>
</table>

This technic will only work if you try to search Angelina Jolie, Angelina, Jolie or even InA JOLIe (why not after all). If you try to search first the lastname like Jolie Angelina, it won't work. You can easily fix it by creating a second fullname in your function (e.g. a reverseFullname), concat in first the lastName and then the firstName and test it just like the first fullname string.

Try this fiddle.

Essentially, I created a sub-structure for filtering within the data structure being displayed and filter only on that property (e.g. 'filterTerms'):

HTML:

<div ng-controller="MyCtrl">
   <input type="text" ng-model="search.filterTerms">
   <table border="1">
      <tr ng-repeat="row in list | filter:search">
         <td>{{row.firstName}} {{row.lastName}}</td>
      </tr>
   </table>
</div>

JavaScript:

var myApp = angular.module('myApp',[]);
function MyCtrl($scope) {
$scope.list = [{
    "id": 1,
    "address": "New York City",
    "firstName": "Jennifer",
    "middleName": null,
    "lastName": "Aniston",
    "filterTerms": {
        "firstName": "Jennifer",
        "middleName": null,
        "lastName": "Aniston",
    }
}, {
    "id": 1,
    "address": "New York City",
    "firstName": "Jennifer",
    "middleName": null,
    "lastName": "Leela",
    "filterTerms": {
        "firstName": "Jennifer",
        "middleName": null,
        "lastName": "Leela",            
    }
}, {
    "id": 2,
    "address": "Beverley Hills",
    "firstName": "Angelina",
    "middleName": null,
    "lastName": "Jolie",
    "filterTerms": {
        "firstName": "Angelina",
        "middleName": null,
        "lastName": "Jolie",            
    }
}, {
    "id": 3,
    "address": "London",
    "firstName": "Emma",
    "middleName": null,
    "lastName": "Watson",
    "filterTerms": {
        "firstName": "Emma",
        "middleName": null,
        "lastName": "Watson",            
    }
}];
}

You could simplify this even further for this case by putting all the names into one field (see fiddle here:

HTML:

<div ng-controller="MyCtrl">
    <input type="text" ng-model="search.filterTerm" />
    <table border="1">
        <tr ng-repeat="row in list | filter:search">
            <td>{{row.first}} {{row.last}} {{row.address}}</td>
        </tr>
    </table>
</div>

JavaScript:

var myApp = angular.module('myApp', []);
function MyCtrl($scope) {
    $scope.list = [{
        "id": 0, "first": "Jenny", "last": "Sorenson", "address": "123 W. Wallnut St.",
        "filterTerm": "Jenny Sorenson"
    },{
        "id": 0, "first": "Susan", "last": "Hinkle", "address": "456 W. Doorbell Dr.",
        "filterTerm": "Susan Hinkle"
    },{
        "id": 0, "first": "Rachel", "last": "Karlyle", "address": "789 W. Sunset Blvd.",
        "filterTerm": "Rachel Karlyle"
    },{
        "id": 0, "first": "Gwen", "last": "Lippi", "address": "0 W. Silly Cir.",
        "filterTerm": "Gwen Lippi"
    }]
}

You can pass the third argument to the filter function:

$filter('filter')(list, {'firstName':search});

I would have done something like below:

<input type="text" ng-model="search">
<table border="1">
    <tr ng-repeat="row in list | filterBoth:search">
        <td>{{row.firstName}} {{row.lastName}}</td>
    </tr>
</table>

And then write the custom filter as:

myApp.filter('filterBoth', function($filter) {
  return function(list, search) {
    if (!search) return list;

    var arrSearch = search.split(' '),
        lookup = '',
        result = [];

    arrSearch.forEach(function(item) {
      lookup = $filter('filter')(list, {'firstName': item});console.log(lookup);
      if (lookup.length > 0) result = result.concat(lookup);
    });

    return result;
  };
});

Demo: http://jsfiddle.net/wAp4S/1/

The only issue is you will get duplicate rows as you are concatenating two similar arrays which can easily be fixed using _.uniq underscore.js method.