Issue Binding AutoPopulating List to a form Spring MVC - forms

Question

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();
itemColor.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

Answer 1

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.