ej2 DataManager with Rails

16 March 2019 • Tags: railsxhrej2

Recently I used syncfusion’s ej2 calendar in a small Rails project and ran into a few problems because Rails is tough on security.

The UrlAdaptor that comes with ej2-data needs to send our beloved csrf-token with all POST requests and this is the way I implemented it:

    class UrlAdaptorWithCredentials extends UrlAdaptor {
      beforeSend(args: DataManager, xhr: XMLHttpRequest) {
        xhr.withCredentials = true;
        var token = document.querySelector('meta[name="csrf-token"]').content
        xhr.setRequestHeader('X-CSRF-Token', token)
        super.beforeSend(args, xhr);
    data = new DataManager({
      url:       '/calendar',
      crossDomain: true,
      adaptor: new UrlAdaptorWithCredentials()

Lastly a general advice on fetch: With rails you’ll need to send the cookie for GET requests and you can do this by adding {credentials: "include"} in the options.

    fetch('/calendar', {credentials: "include"})