8.3.11 Named URL Mappings
URL Mappings also support named mappings, that is mappings which have a name associated with them. The name may be used to refer to a specific mapping when links are generated.
The syntax for defining a named mapping is as follows:
static mappings = {
name <mapping name>: <url pattern> {
// ...
}
}
For example:
static mappings = {
name personList: "/showPeople" {
controller = 'person'
action = 'list'
}
name accountDetails: "/details/$acctNumber" {
controller = 'product'
action = 'accountDetails'
}
}
The mapping may be referenced in a link tag in a GSP.
<g:link mapping="personList">List People</g:link>
That would result in:
<a href="/showPeople">List People</a>
Parameters may be specified using the params attribute.
<g:link mapping="accountDetails" params="[acctNumber:'8675309']">
Show Account
</g:link>
That would result in:
<a href="/details/8675309">Show Account</a>
Alternatively you may reference a named mapping using the link namespace.
<link:personList>List People</link:personList>
That would result in:
<a href="/showPeople">List People</a>
The link namespace approach allows parameters to be specified as attributes.
<link:accountDetails acctNumber="8675309">Show Account</link:accountDetails>
That would result in:
<a href="/details/8675309">Show Account</a>
To specify attributes that should be applied to the generated href
, specify a Map
value to the attrs
attribute. These attributes will be applied directly to the href, not passed through to be used as request parameters.
<link:accountDetails attrs="[class: 'fancy']" acctNumber="8675309">
Show Account
</link:accountDetails>
That would result in:
<a href="/details/8675309" class="fancy">Show Account</a>