Sencha Touch Cookbook

Defining the custom validation

In the previous recipe, we saw out-of-the-box validations available in Sencha Touch. However, for various practical reasons, we may have a need to create additional validation rules and use them across the application. For example, the payment amount must not be negative; date must be prior to today's date, and so on.

In this recipe, we will go through the steps to create a new validation rule and use it in the application.

Getting ready

Make sure that you have set up your development environment by following the recipes outlined in Chapter 1.

How to do it...

Carry out the following steps:

1. Create and open a new file named ch05_07.js and paste the following code into it:

   Ext.setup({ onReady: function() { Ext.apply(Ext.data.validations, ...