Utilizing scope parameters in conjunction with filters

Question

Utilizing scope parameters in conjunction with filters

I'm looking for a filtering solution to filter results displayed in a table using ngRepeat. The filter should be based on user input.

Currently, I'm implementing it like this:

//HTML
<input type="search" ng-model="search">

<table>
  <tr ng-repeat="person in clients | filter: searchFilter">
    <td><input type="text" ng-model="person.Vorname"></td>            
  </tr>
</table>

The controller / Filter function:

app.controller('MyCtrl',function($scope){
  $scope.searchFilter = function (obj) {
    var re = new RegExp($scope.search, 'i');
    return !$scope.search || re.test(obj.Vorname) || re.test(obj.Firma);
  };
});

Everything is functioning correctly. However, I'm unsure if this is the best approach.

Should I consider moving my filter function to an Angular filter for better standards compliance?

If so, how can I pass the value from my input element to the filter? Passing the scope itself seems too dependent on the scope. What would be the best practice in this case?

Looking for guidance on the most effective way to handle this filtering process.

javascript angularjs

Answer 1

Answer №1

Is it recommended to move my filter function to a proper angular.filter for better standards compliance?

Indeed, the preferred approach is to utilize filters as utilities (similar to singletons like service, provider, factory).

Filters do not rely on $scope; instead, they generate output based on input. Therefore, you can define your filter in the following manner:

app.filter('myfilter', function() {
   return function( items, types) {
    var filtered = [];

    angular.forEach(items, function(item) {
       // <some conditions>
          filtered.push(item);  // dummy usage, returns the same object         
        }
    });

    return filtered;
  };
});

Adapted from Fiddle Demo

For Reference

If you are using the codeigniter framework with angular seed, notice that they employ a separate file named:

filters.js      --> custom angular filters

The project structure resembles:

app/                --> all files utilized in production
  css/              --> cascading style sheets
    app.css         --> default stylesheet
  img/              --> image files
  index.html        --> primary app layout template
  index-async.html  --> loads js files asynchronously from index.html
  js/               --> javascript files
    app.js          --> application logic
    controllers.js  --> application controllers
    directives.js   --> application directives
    filters.js      --> custom angular filters
    services.js     --> custom angular services
  lib/              --> angular and third-party JavaScript libraries
    angular/
      angular.js        --> latest version of AngularJS
      angular.min.js    --> minified AngularJS
      angular-*.js      --> various Angular add-on modules
      version.txt       --> version information
  partials/             --> Angular view partials (HTML templates)
    partial1.html
    partial2.html

Answer 2

Is it recommended to move my filter function to a proper angular.filter for better standards compliance?

Indeed, the preferred approach is to utilize filters as utilities (similar to singletons like service, provider, factory).

Filters do not rely on $scope; instead, they generate output based on input. Therefore, you can define your filter in the following manner:

app.filter('myfilter', function() {
   return function( items, types) {
    var filtered = [];

    angular.forEach(items, function(item) {
       // <some conditions>
          filtered.push(item);  // dummy usage, returns the same object         
        }
    });

    return filtered;
  };
});

Adapted from Fiddle Demo

For Reference

If you are using the codeigniter framework with angular seed, notice that they employ a separate file named:

filters.js      --> custom angular filters

The project structure resembles:

app/                --> all files utilized in production
  css/              --> cascading style sheets
    app.css         --> default stylesheet
  img/              --> image files
  index.html        --> primary app layout template
  index-async.html  --> loads js files asynchronously from index.html
  js/               --> javascript files
    app.js          --> application logic
    controllers.js  --> application controllers
    directives.js   --> application directives
    filters.js      --> custom angular filters
    services.js     --> custom angular services
  lib/              --> angular and third-party JavaScript libraries
    angular/
      angular.js        --> latest version of AngularJS
      angular.min.js    --> minified AngularJS
      angular-*.js      --> various Angular add-on modules
      version.txt       --> version information
  partials/             --> Angular view partials (HTML templates)
    partial1.html
    partial2.html

Utilizing scope parameters in conjunction with filters

Answer №1

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