The form submission process can be halted by replying to the maybe:submit request on a form specific radio channel (TODO: Add link to Radio docs). The return value (boolean) of the callback will determine if the form continues to submit.
Setting form “extra data” can be used as a flag to conditionally halt a submission. This can be very useful for an asyn callback that re-starts the form submission process.
| var myCustomController = Marionette.Object.extend({ | |
| initialize: function() { | |
| // … | |
| Backbone.Radio.channel( 'form-' + formID ).reply( 'maybe:submit', this.beforeSubmit, this, formID ); | |
| }, | |
| beforeSubmit: function( formID ) { | |
| var formModel = nfRadio.channel( 'app' ).request( 'get:form', formID ); | |
| if( formModel.getExtra( 'my_restart_flag' ) ) return true; | |
| this.otherProcessing( formModel ); | |
| // Halt form submission. | |
| return false; | |
| }, | |
| otherProcessing: function( formModel ) { | |
| // Set re-start flag | |
| nfRadio.channel( 'form-' + this.formModel.get( 'id' ) ).request( 'add:extra', 'my_restart_flag', true ); | |
| // Re-start submission. | |
| nfRadio.channel( 'form-' + formModel.get( 'id' ) ).request( 'submit', formModel ); | |
| }, | |
| }); | |
| jQuery( document ).ready( function( $ ) { | |
| new myCustomController(); | |
| }); |