While creating an ExtJS form with several radio buttons today I ran into a bug which caused none of them to work as expected, even though there were no errors/exceptions. To cut a long story short, it was because I was setting the name to "schedule[include_type]" - like this:

{
  xtype: 'radio',
  name: 'schedule[include_type]',
  inputValue: 'page',
  boxLabel: 'Show page:'
}

This radio button is one of 4, which allows the user which type of file they want to include on a particular model (a Schedule in this case) - be it Page, Video, Category or one other. The thing is - none of them work with the square brackets in the name. If you remove the brackets, they all work correctly, but the server-side is relying on those brackets to be present to group the data correctly.

In the end I bit the bullet and updated my submit method to add a new parameter directly - here's a full example: