link

Purpose

Creates an html anchor tag with the href set based on the parameters specified.

Examples

Example controller for an application called "shop":

class BookController {
     def list = { [ books: Book.list( params ) ] }
     def show = { [ book : Book.get( params['id'] ) ] }
}

Example usages for above controller:

<g:link action="show" id="1">Book 1</g:link>
<g:link action="show" id="${currentBook.id}">${currentBook.name}</g:link>
<g:link controller="book">Book Home</g:link>
<g:link controller="book" action="list">Book List</g:link>
<g:link url="[action:'list',controller:'book']">Book List</g:link>
<g:link action="list" params="[sort:'title',order:'asc',author:currentBook.author]">
     Book List
</g:link>
<g:link controller="book" absolute="true">Book Home</g:link>
<g:link controller="book" base="http://admin.mygreatsite.com">Book Home</g:link>

Example as a method call in GSP only:

<%= link(action:'list',controller:'book') { 'Book List' }%>

Results in:

<a href="/shop/book/list">Book List</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
• elementId (optional) - this value will be used to populate the id attribute of the generated href
• 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 containing request parameters
• url (optional) - a map containing the action, controller, id etc.
• absolute (optional) - If set to "true" will prefix the link target address with the value of the grails.serverURL property from Config, or http://localhost:<port> if no value in Config and 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 absolute property, if both are specified.

Source

Show Source

def link = { attrs, body ->
        def writer = getOut()
        def elementId = attrs.remove('elementId')
        writer <<  "<a href=\"${createLink(attrs).encodeAsHTML()}\""
        if(elementId) {
           writer << " id=\"${elementId}\""
        }
        writer << "${attrs.collect {k, v -> " $k=\"$v\"" }.join('')}>"
        writer << "${body()}</a>"
    }