(Quick Reference)
                createLink
Purpose
Creates a link that can be used where necessary (for example in an href, JavaScript, Ajax call etc.)
Examples
Example controller for an application called "shop":
class BookController {    static defaultAction = "list"    def list() {
        [books: Book.list(params)]
    }    def show() {
        [book: Book.get(params.id)]
    }
}Example usages for above controller:
// generates "/shop/book/show/1"
<g:createLink action="show" id="1" />// generates "/shop/book/show?foo=bar&boo=far"
<g:createLink action="show" params="[foo: 'bar', boo: 'far']"/>// generates "/shop/book"
<g:createLink controller="book" />// generates "/shop/book/list"
<g:createLink controller="book" action="list" />// generates "/shop/book/list"
<g:createLink url="[action:'list',controller:'book']" />// generates a link tot he book controller in the publishing namespace
<g:createLink controller="book" namespace="publishing"/>// generates "http://portal.mygreatsite.com/book"
<g:createLink controller="book" absolute="true"/>// generates "http://admin.mygreatsite.com/book"
<g:createLink controller="book" base="http://admin.mygreatsite.com"/>// generates "/shop/book/list/1?title=The+Shining&author=Stephen+King"
<g:createLink controller="book" action="list"
              params="[title: 'The Shining', author: 'Stephen King', id: '1']"/>Example as a method call in GSP:
<a href="${createLink(action: 'list')}">my link</a>results in:
<a href="/shop/book/list">my link</a>
Description
Attributes
- action(optional) - The name of the action to use in the link; if not specified the default action will be linked
- controller(optional) - The name of the controller to use in the link; if not specified the current controller will be linked
- namespace(optional) - the namespace of the controller to use in the link
- plugin(optional) - the name of the plugin which provides the controller
- id(optional) - The id to use in the link
- fragment(optional) - The link fragment (often called anchor tag) to use
- mapping(optional) - The named URL mapping to use to rewrite the link
- params(optional) - A Map of request parameters
- url(optional) - A Map containing the action,controller,id etc.
- uri(optional) - A string for a relative path in the running app.
- relativeUri(optional) - Used to specify a uri relative to the current path.
- absolute(optional) - If- truewill prefix the link target address with the value of the- grails.serverURLproperty from- application.groovy, or http://localhost:<port> if there is no setting in- application.groovyand not running in production.
- base(optional) - Sets the prefix to be added to the link target address, typically an absolute server URL. This overrides the behaviour of the- absoluteproperty if both are specified.
- event(optional) - The name of a Webflow event to trigger for the flow associated with the given- action. Requires the Webflow plugin.
Source