Issue Binding AutoPopulating List to a form Spring MVC

I have an issue binding the AutoPupulating List in a form to update the data. I was able to save the data using Autopopulating list though.

Here is the form backing model.

public class AddUpdateShot {

private Integer shootId;
private char shotSelect;
private String shotNotes;   
private Integer numOfItems;
private AutoPopulatingList itemNumColors;
private Integer totalNumOfItems;
private String shotName;

----------

public void setItemNumColors(AutoPopulatingList  itemNumColors){
    this.itemNumColors = itemNumColors;
}

public AutoPopulatingList getItemNumColors(){
    return this.itemNumColors;
}

--------

}

Where itemNumClors is a simple model

public class ItemNumColor {

private Integer id;
private Integer itemNum;
private String itemName;
private String colorCode;
private String colorName;

------get and set methods    

}

When I first saved the data, depending on how many ItemColors the user wanted,using jquery I added the input fields dynamically as shown in the following code.

<form:form id="createShootForm" method="POST"
            commandName="createShoot">
<tr>
<td align="left"><label for="shootName">*Shoot Name:</label></td>
<td><form:input id="shootName" class="required" path="shootName" /></td>
</tr>
 ------- other input fields in form backing obj----

<c:forEach var="i" begin="${start}" end="${end-1}" step="1" varStatus="status">
<tr>
    <td align="left"><label for="itemNumber${i}">Item
            Number${i+1}:</label></td>
    <td><form:input id="itemNumber${i}"
            path="createShoot.itemNumColors[${i}].itemNum" /></td>
    <td><form:select id="color${i}"
            path="createShoot.itemNumColors[${i}].colorCode">
            <form:option value="" label="Color" />
        </form:select>
    </td>
</tr>
</c:forEach>
<tr id="submitRow">
<td></td>
<td></td>
<td align="right"><input name="submit" type="submit" value="Next" /></td>
</tr>
</table>
</form:form>

The above code worked perfectly fine when I initially saved the data. But now when the user want to update the earlier saved data, I am unable to bind the Autopopulating list to the JSP. Here is how am doing it.

<form:form id="updateShotForm" method="POST"
            commandName="shotToUpdate">
----other input fields of form backing object---
<c:forEach var="i" begin="0" end="${totalNumOfItems-1}" step="1"
                    varStatus="status">
<tr><td align="left"><label for="itemNumber${i}">ItemNumber${i+1}:</label></td>  
<td><form:input id="itemNumber${i}"path="shotToUpdate.itemNumColors[${i}].itemNum"  /></td> 
</tr>
</c:forEach>
<tr id="submitRow">
<td></td>
<td></td>
<td align="right"><input name="submit" type="submit"
                        value="Next" />
</td>
</table>
</form:form>

When I open the edit JSP, I get the following run time exception

Sep 7, 2011 10:38:00 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [jalapeno] in context with path [/OnLocation] threw exception [An exception occurred processing JSP page /WEB-INF/views/app/updateShot.jsp at line 256

253:   <tr>
254:    <td align="left"><label for="itemNumber${i}">Item
255:                Number${i+1}:</label></td>
256:    <td><form:input id="itemNumber${i}"
257:        path="shotToUpdate.itemNumColors[${i}].itemNum" /></td>
258:    <td><form:select id="color${i}"
259:        path="shotToUpdate.itemNumColors[${i}].colorCode">

Stacktrace:] with root cause
org.springframework.beans.NotReadablePropertyException: Invalid property 'shotToUpdate' of bean class [com.jcrew.jalapeno.app.model.AddUpdateShot]: Bean property 'shotToUpdate' is not readable or has an invalid getter method: Does the return type of the getter match the parameter type of the setter?
at org.springframework.beans.BeanWrapperImpl.getPropertyValue(BeanWrapperImpl.java:707)
at org.springframework.beans.BeanWrapperImpl.getNestedBeanWrapper(BeanWrapperImpl.java:555)
at org.springframework.beans.BeanWrapperImpl.getBeanWrapperForPropertyPath(BeanWrapperImpl.java:532)
at org.springframework.beans.BeanWrapperImpl.getPropertyValue(BeanWrapperImpl.java:697)
at org.springframework.validation.AbstractPropertyBindingResult.getActualFieldValue(AbstractPropertyBindingResult.java:98)
at org.springframework.validation.AbstractBindingResult.getFieldValue(AbstractBindingResult.java:224)
at org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:120)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getBindStatus(AbstractDataBoundFormElementTag.java:174)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getPropertyPath(AbstractDataBoundFormElementTag.java:194)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getName(AbstractDataBoundFormElementTag.java:160)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.writeDefaultAttributes(AbstractDataBoundFormElementTag.java:123)
at org.springframework.web.servlet.tags.form.AbstractHtmlElementTag.writeDefaultAttributes(AbstractHtmlElementTag.java:408)
at org.springframework.web.servlet.tags.form.InputTag.writeTagContent(InputTag.java:140)
at org.springframework.web.servlet.tags.form.AbstractFormTag.doStartTagInternal(AbstractFormTag.java:102)

I am not sure why I am not able to bind the object this way to the form since my form backing object does have an Autopopulating List which I initialised in the controller before loading this form

    AutoPopulatingList itemNumColors = new AutoPopulatingList(ItemNumColor.class);

    for( OnLocShotItemNumber onLocItemNumColor : itemNumColorsList){
        ItemNumColor itemColor = new ItemNumColor();
        i开发者_如何学CtemColor.setId(onLocItemNumColor.getId());
        itemColor.setColorCode(onLocItemNumColor.getItemColorCode());
        itemColor.setItemNum(onLocItemNumColor.getItemNumber());
        itemNumColors.add(itemColor);
    }

    shotToUpdate.setItemNumColors(itemNumColors);

model.put("shotToUpdate", shotToUpdate);
model.put("totalNumOfItems", itemNumColorsList.size());

Any help is greatly appreciated.

Thanks, Shravanthi

Remove the 'shotToUpdate.' keyword from the PATH attribute. You have already specified the command object name so the PATH attributes should be relative to the command object.