[seam-dev] Suppressing parameter inclusion for s:link

[Pete Muir]

On 24 Oct 2008, at 12:48, Christian Bauer wrote:

>
> On Oct 24, 2008, at 13:21 , Pete Muir wrote:
>
>> As Christian said, <f:param name="whatever" /> is probably the  
>> wrong syntax for this, as it implies you are adding a parameter,  
>> not removing it. Maybe we need an <s:suppressPageParameter  
>> name="foo" /> instead.
>
> -1, just document <f:param name="foo" value="#{null}"/> and that's  
> it for suppressing a page parameter. Overriding is then consistent  
> with <f:param name="foo" value="#{override}"/>. This would be the  
> easiest solution. Any syntax we come up with to do the same in a  
> different way is going to be more complex.
>
> Or/and we do this:
>
> <page view-id="one.xhtml">
>  <param name="foo" value="#{binding.getterAndSetter"/>
>  <param name="bar" value="#{binding.getterAndSetter"/>
> </page>
>
> Regular link that evaluates #{binding.getterAndSetter} to get the  
> "foo" and "bar" parameter values (that's the (current) default):
>
> <s:link view-id="one.xhtml" page-parameters="override"/>
>
> Link that only contains the "bar" parameter with  
> #{binding.getterAndSetter} value:
>
> <s:link view-id="one.xhtml" page-parameters="override">
>  <f:param name="foo"/>
> </s:link:
>
> Link that only contains the "bar" parameter with #{binding.other}  
> value:
>
> <s:link view-id="one.xhtml" page-parameters="override">
>  <f:param name="foo"/>
>  <f:param name="bar" value="#{binding.other}"/>
> </s:link:
>
> Link that only contains the "foo" parameter with  
> #{binding.getterAndSetter} value:
>
> <s:link view-id="one.xhtml" page-parameters="ignore">
>  <f:param name="foo"/>
> </s:link>
>
> Link that only includes the "foo" parameter with #{binding.other}  
> value:
>
> <s:link view-id="one.xhtml" page-parameters="ignore">
>  <f:param name="foo" value="#{binding.other}"/>
> </s:link>
>
> The advantage here is that we can keep it backwards compatible, if  
> you have the default page-parameters="override", the #{null} trick,  
> the "" value trick, and the no-value-attribute all continue to work  
> as before.

I like this.

>
>
> But really, this is not so much an absolutely necessary code  
> feature, it's foremost a documentation change. Even an FAQ entry  
> would be OK.
>
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