You can do this with Struts 2, but I've found that it can be a bit
hairy when it comes to type conversion. The general idea is to use an
action property which is a Map of objects that you want to save keyed
by a unique identifier for each one. The two problems that I run into
when doing this are:
1. The view syntax -- accessing properties in a map using OGNL,
struts tags, JSTL, and/or JSP EL can be confusing, and I sometimes
find that a mixture of all of the above is needed for at least
somewhat concise code. I often find that I need to look at the
rendered source of a page in order to figure out how to get the values
from the page setup action properly displayed, and the user input
values correctly and safely submitted to the post action.
2. Type conversion -- even after I think I have the submit value
correct, I sometimes find that Struts 2 does not do type
conversion/action property population as I expect. In order to get
this sorted out, I rely on a debugger, and make sure the debugger has
access to the Struts 2 and Xwork source (yay open source!)
For example, say you had a set of questions that you wanted to make
editable, you might do something like this:
QuestionSetupAction:
private List<Question> questionList;
public void setQuestionList(List<Question> questionList)...
public List<Question> getQuestionList()...
public String execute() {
questionList = questionDao.findQuestions();
return SUCCESS;
}
QuestionEdit.jsp:
<s:form action="questionPost">
<s:iterator value="questionList">
<s:textfield name="questionMap[%{id}].questionText" value="questionText"/>
</s:iterator>
<s:submit/>
</s:form>
QuestionPostAction:
private Map<Long, Question> questionMap;
public void setQuestionMap(Map<Long, Question>)...
public Map<Long, Question> getQuestionMap()...
If you want to get fancy, you can use javascript to make any cell on
your table editable on click, and submit any change to the server
using ajax. This doesn't really buy you all that much, unless you
have lots and lots of rows and columns, in which case you could
greatly cut the amount of data you need to sort through in the post
action.
Josh
On 10/15/07, wild_oscar <[EMAIL PROTECTED]> wrote:
>
> Imagine a table with a List of items (say, a List of people, each with an ID,
> Name and age). I am thinking about developing a way to make all rows
> editable and able to be saved simultaneously with a single submit button.
>
> Specifically, each item (Person, in the example) is an object mapped with
> hibernate (although this feature should be independent of the persistent
> media). And ideally, the method should be smart enough to detect on which
> rows there were changes and only update these rows.
>
> Has anyone ever developed such a table, or knows of a strategy to implement
> it?
> --
> View this message in context:
> http://www.nabble.com/GridView---save-multiple-items-at-the-same-time-tf4625630.html#a13209261
> Sent from the Struts - User mailing list archive at Nabble.com.
>
>
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