struts-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Arron Bates <struts-u...@keyboardmonkey.com>
Subject Re: Nested Tags question
Date Fri, 14 Jun 2002 05:22:01 GMT
try...

document.forms[0]["mailingAddress.city"]

...works a treat.


Arron.

Jayaraman Dorai wrote:

>When I use nested tags, I am not able to access it through java scripts since the name
is "mailingAddress.city". Does anyone have a work around or am I missing something?
>
>Jayaraman
>
>-----Original Message-----
>From: Craig R. McClanahan [mailto:craigmcc@apache.org]
>Sent: Thursday, June 13, 2002 12:23 PM
>To: Struts Users Mailing List
>Subject: Re: Re: Nested Tags question
>
>
>
>
>On Thu, 13 Jun 2002 adam.hardy@cyberspaceroad.com wrote:
>
>>Date: Thu, 13 Jun 2002 11:43:59 +0200
>>From: adam.hardy@cyberspaceroad.com
>>Reply-To: Struts Users Mailing List <struts-user@jakarta.apache.org>
>>To: Struts Users Mailing List <struts-user@jakarta.apache.org>
>>Subject: Re: Re: Nested Tags question
>>
>>So Craig,
>>does the process work at submit time (when the request parameters are
>>being put into the nested beans) via calls to the getter methods to get
>>the beans on which the parameters have to be set?
>>
>>I can't see how else it would work.
>>
>
>It depends on what context you are using the expressions in.  For example:
>
>  <!-- Assume the form bean name is "customerForm" -->
>  <html:form action="/editCustomer">
>    ...
>    <html:text property="mailingAddress.city"/>
>    ...
>  </html:form>
>
>will, in effect, do a call to:
>
>  customerForm.getMailingAddress().getCity()
>
>when the page is displayed, and a call to:
>
>  customerForm.getMailingAddress().setCity()
>
>when the request parameters are being copied in to the form bean.
>
>>Adam
>>
>
>Craig
>
>
>>
>>"Craig R. McClanahan" <craigmcc@apache.org> schrieb am 13.06.2002,
>>08:22:43:
>>
>>>
>>>On Thu, 13 Jun 2002, Arron Bates wrote:
>>>
>>>>Date: Thu, 13 Jun 2002 14:14:13 +1000
>>>>From: Arron Bates
>>>>Reply-To: Struts Users Mailing List
>>>>To: Struts Users Mailing List
>>>>Subject: Re: Nested Tags question
>>>>
>>>>>
>>>>>I know JSP will automatically save parameters to a javabean with the
>>>>>correctly named getters and setters, but there's obviously a gap in my
>>>>>knowledge because all my attempts to recreate the situation above have
>>>>>failed.
>>>>>
>>>>Setting form properties against beans is a Struts thing, not a JSP
>>>>thing. The property thing is a Bean thin and can be looked up in the
>>>>JavaBean spec.
>>>>
>>>>The example you quote...
>>>>
>>>>    "monkeyTeamAlpha.monkeyWorkers[0].salary"
>>>>
>>>>        ...is a nested property. An invention implemented within Struts
>>>>(Craig?).
>>>>
>>>Yep, although in Struts 1.1 it is really a "commons-beanutils" thing
>>>because we abstracted out this generally useful code into a separate
>>>package.
>>>
>>>>What it basically is, is a string of calls rather than the
>>>>single property method. Here, it will get a hold of the form bean, get a
>>>>hold of the bean returned from the "monkeyTeamAlpha"property. On this
>>>>bean, it will invoke the indexed property "monkeyWorkers[0]" which will
>>>>pluck a bean from a collection or index provided, from this last bean it
>>>>will will get a hold of its "salary" property, and set the value.
>>>>
>>>At each stage, you also get the benefit of some intelligence that is built
>>>in to the underlying PropertyUtils class.  For example, the JavaBeans spec
>>>defines two ways to define an indexed property -- you can use getter and
>>>setter methods that take a value and a subscript, or you can use getter
>>>and setter methods that return the entire array.  PropertyUtils makes the
>>>expression listed above work for either (or even for a property whose
>>>value is a java.util.List, which is an extension to the JavaBeans spec).
>>>
>>>>All this boils down to, is that you can compose objects a little
>>>>cleaner, rather than have truly enormous beans for everything. Having
>>>>the indexed properties allows for lists and whatever else.
>>>>
>>>>The ability for nesting beans has been in Struts for a long time. The
>>>>nested tags just make it much easier.
>>>>
>>>>There's a primer and tutorial for nested beans here...
>>>>
>>>>    http://www.keyboardmonkey.com/next
>>>>
>>>>        ...it should take you over creating and using such a construct.
>>>>
>>>>Hope this gets you on th path you're after.
>>>>
>>>Another area of useful learning for the future is the JSP Standard Tag
>>>Library (JSTL).  Although the expression language syntax supported by JSTL
>>>is different from the one in Struts, it is well worth learning about --
>>>this expression language will be supported anywhere in a JSP page in JSP
>>>1.3, and (in the mean time) we will likely adapt Struts tags to be able to
>>>use it as well.
>>>
>>>>
>>>>Arron.
>>>>
>>>Craig
>>>
>>>
>>>--
>>>To unsubscribe, e-mail:
>>>For additional commands, e-mail:
>>>
>>--
>>To unsubscribe, e-mail:   <mailto:struts-user-unsubscribe@jakarta.apache.org>
>>For additional commands, e-mail: <mailto:struts-user-help@jakarta.apache.org>
>>
>>
>
>
>--
>To unsubscribe, e-mail:   <mailto:struts-user-unsubscribe@jakarta.apache.org>
>For additional commands, e-mail: <mailto:struts-user-help@jakarta.apache.org>
>
>
>--
>To unsubscribe, e-mail:   <mailto:struts-user-unsubscribe@jakarta.apache.org>
>For additional commands, e-mail: <mailto:struts-user-help@jakarta.apache.org>
>



--
To unsubscribe, e-mail:   <mailto:struts-user-unsubscribe@jakarta.apache.org>
For additional commands, e-mail: <mailto:struts-user-help@jakarta.apache.org>


Mime
View raw message