How can I change the way GRAILS GSP fieldValue formats Integers?

Question

I have a field in my domain object which I define as an Integer...

Integer minPrice

I then access it in a GSP page as follows:

Answer 1

I found the best way to handle this was doing what Victor Sergienko (upped btw) hinted at with using a PropertyEditor.

Create an editor for Integer, put in src/groovy:

class IntegerEditor extends PropertyEditorSupport {
    void setAsText(String s) {
        if (s) value = s as Integer
    }

    public String getAsText() {
        value
    }
}

and register it using a PropertyEditorRegistrar (also in src/groovy):

class MyEditorRegistrar implements PropertyEditorRegistrar {
    public void registerCustomEditors(PropertyEditorRegistry reg) {
        reg.registerCustomEditor(Integer, new IntegerEditor())
    }
}

add your registrar into the spring config (grails-app/conf/spring/resource.groovy):

beans = {
    customEditorRegistrar(MyEditorRegistrar)
}

From now on any Integers that are bound, receive errors (or not) and then redisplayed with the fieldValue tag should be displayed by Integer's default toString - you can customise this behaviour in the editor by amending the getAsText implementation.

Personally I would create a wrapper for this kind of thing so you can set up an editor just for that type rather than across the board for a frequently used type. Though I realise this would mean a little bit of mapping when persisting to the DB...