Spring form, create elements client side usig javascript

Question

I have a spring form, with backing object that includes a LazyList - works hunky dory.

The form initally shows:

<tr><td>
<form:textarea path="myList[0]" cssClass="myClass" rows="2" cols="35"/>
</td><tr>
<tr><td>
<form:textarea path="myList[1]" cssClass="myClass" rows="2" cols="35"/>
</td><tr>

When a user focusses on the final textarea I want another one to be appended. The html and javascript I have OK, its the binding to the spring backing object that is a problem, my javascript so far:

var myStr =  '<tr><td>'+
    '<form:textarea path="myList[2]" cssClass="myClass" rows="2" cols="35"/>'+
    '</td><tr>'     

function myAppend(){
jq('#myTable tr:last').find("textarea").unbind('focus');
jq('#myTable tr:last').after(myStr);
jq('#instructionTable tr:last').find("textarea").bind('focus', function() {
    myAppend();
    });
}

However the rendering is screwed up ... any tips ?

I've found this, which performs and ajax call for each new line. Is their any other option ?

Are you closing your <tr> tags properly? In the example there are no </tr>. — Rusty Fausak
– Rusty Fausak, Commented Sep 22, 2011 at 17:27
eggsylife.co.uk/2009/11/30/spring-forms-dynamic-lists-and-ajax — NimChimpsky
– NimChimpsky, Commented Sep 23, 2011 at 6:33
stackoverflow.com/questions/1439044/dynamic-forms-in-spring/… — NimChimpsky
– NimChimpsky, Commented Sep 23, 2011 at 7:23

RicoZ · Accepted Answer · 2011-09-23 06:49:20Z

1

The spring <form:textarea ... /> tag is evaluated on server side. It renders the according HTML Element based on the given tag parameters. So a:

<form:textarea path="name"/>

is rendered to

<textarea id="name" name="name"></textarea>

So you have to append a <textarea /> Element with your javascript.

The reason for using the tag is to bind the submited value to the 'commandBean' provided by your spring controller.

edited Sep 23, 2011 at 6:49

answered Sep 22, 2011 at 20:48

RicoZ

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2 Comments

NimChimpsky Over a year ago

A solution to that problem is here : eggsylife.co.uk/2009/11/30/spring-forms-dynamic-lists-and-ajax

NimChimpsky Over a year ago

And stackoverflow.com/questions/1439044/dynamic-forms-in-spring/…

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