How to override standard behavior of ApplicationTagLib#createLink and g:link?

Question

Background: I have grails 1.3.7 application which uses g:createLink and g:link on many pages.

Recently I decided to make b

Answer 1

I had a smilar problem. Actually you can decorate g:link tag like this.

1) TagLib

import org.codehaus.groovy.grails.plugins.web.taglib.*

class OverrideDefaultTagLib {

    static namespace = "g"

    def link = { attrs, body ->

        def c = "1" // Get it from session or somewhere else

        if (attrs.params) {
            attrs.params.put("region", c)
        } else {
            attrs.params = [region: c]
        }

        def applicationTagLib = grailsApplication.mainContext.getBean('org.codehaus.groovy.grails.plugins.web.taglib.ApplicationTagLib')
            applicationTagLib.link.call(attrs, body)
        }
    }
}

2) add to UrlMappings.groovy

"/$region/$controller/$action?/$id?"{}