Spring can't find bean property in a list element.

[sam White]

Hi with spring MVC 3.0.5 and jsp, I tried to treverse a List of beans, but it thrown the following exception:

...
02:15:53,992 ERROR [org.springframework.web.servlet.tags.form.LabelTag] (http--192.168.1.20-8080-3) Invalid property 'article' of bean class [LuxuryLiving.manager.pagebean.ProductBean]: Bean property 'article' is not readable or has an invalid getter method: Does the return type of the getter match the parameter type of the setter?: org.springframework.beans.NotReadablePropertyException: Invalid property 'article' of bean class [LuxuryLiving.manager.pagebean.ProductBean]: Bean property 'article' 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) [spring-beans-3.0.5.RELEASE.jar:3.0.5.RELEASE]
at org.springframework.beans.BeanWrapperImpl.getNestedBeanWrapper(BeanWrapperImpl.java:555) [spring-beans-3.0.5.RELEASE.jar:3.0.5.RELEASE]
at org.springframework.beans.BeanWrapperImpl.getBeanWrapperForPropertyPath(BeanWrapperImpl.java:532) [spring-beans-3.0.5.RELEASE.jar:3.0.5.RELEASE]
....

jsp code:

<c:forEach var="article" items="${productbean.articles}" >
                   <tr>
                            <td><form:label for="article.header" path="article.header" > Header:</form:label></td>
                            <td colspan="2"><form:textarea path="article.header" value="${article.header}"   /></td>
                    </tr>
                </c:forEach>

productbean class:

public class ProductBean {
    private static final Logger logger = Logger.getLogger(ProductBean.class);
        
        private String productId = "";
	@Size(min=6, max=80, message="Product name must be between 6 and 80 characters")
        private String productName = "";
        private List<ProductArticleBean> articles;
...
public List<ProductArticleBean> getArticles() {
        return articles;
    }

    public void setArticles(List<ProductArticleBean> articles) {
        this.articles = articles;
    }

ProductArticleBean class:

public class ProductArticleBean {
protected String header = "";
    protected String pointForm = "";
    protected String productDesc = "";
public String getHeader() {
        return header;
    }

    public void setHeader(String header) {
        this.header = header;
    }

    public String getPointForm() {
        return pointForm;
    }

    public void setPointForm(String pointForm) {
        this.pointForm = pointForm;
    }

    public String getProductDesc() {
        return productDesc;
    }

    public void setProductDesc(String productDesc) {
        this.productDesc = productDesc;
    }

I know the problem is in my jsp file, but I couldn't figured out how to correct the error.
Any suggestion is very appreciated.
Thanks
Sam

[Mark Spritzler]

Looks like you have a typo somewhere. Not what I see, but somewhere, and might not be that loop in the jsp

"Invalid property 'article' of bean class [LuxuryLiving.manager.pagebean.ProductBean]: Bean property 'article'"

That says to me, somewhere you forgot an "s" in the name of the property, as ProductBean has "articles" but not "article" Do a text find in your jsp.

Mark

[sam White]

I changed to something like this:

<c:forEach var="article" items="${productbean.articles}" varStatus="loopStatus" >
                    <tr>
                       <td>Article Header</td>
                       <td>
                            <spring:bind path = "productbean.articles[${loopStatus.index}].header">
                                 <Error messages></Error>
                                 <form:input name = "header" id = "header" path="${productbean.articles[loopStatus.index].header}" value="${productbean.articles[loopStatus.index].header}"/>
                            </spring:bind>
                       </td>
                    </tr>
                    <tr>
                       <td>Article Description</td>
                       <td>
                            <spring:bind path = "productbean.articles[${loopStatus.index}].productDesc">
                                 <Error messages></Error>
                                 <form:textarea name = "productDesc" id = "productDesc" path="${productbean.articles[loopStatus.index].productDesc}" value="${productbean.articles[loopStatus.index].productDesc}"/>
                            </spring:bind>
                       </td>
                    </tr>
                    <tr>
                       <td>Article Point-form</td>
                       <td>
                            <spring:bind path = "productbean.articles[${loopStatus.index}].pointForm">
                                 <Error messages></Error>
                                 <form:input name = "pointForm" id = "pointForm" path="${productbean.articles[loopStatus.index].pointForm}" value="${productbean.articles[loopStatus.index].pointForm}"/>
                            </spring:bind>
                       </td>
                    </tr>
                </c:forEach>
                

Is this correct? Now error is free, but I am not sure whether this will pick up the value from my backing bean (productbean).
thanks
Sam

[sam White]

I have added more codes to it, but error comes back.
Here is the code:

<c:forEach var="article" items="${productbean.articles}" varStatus="loopStatus" >
                    <tr>
                       <td>Article Header</td>
                       <td>
                            <spring:bind path = "productbean.articles[${loopStatus.index}].header">
                                 <Error messages></Error>
                                 <form:input name = "header" id = "header" path="${productbean.articles[loopStatus.index].header}" size="100" 
                                             value="${productbean.articles[loopStatus.index].header}"/>
                            </spring:bind>
                       </td>
                    </tr>
                    <tr>
                       <td>Article Description</td>
                       <td>
                            <spring:bind path = "productbean.articles[${loopStatus.index}].productDesc">
                                 <Error messages></Error>
                                 <form:textarea name = "productDesc" id = "productDesc" path="${productbean.articles[loopStatus.index].productDesc}" 
                                                value="${productbean.articles[loopStatus.index].productDesc} " rows="8" cols="65"/>
                            </spring:bind>
                       </td>
                    </tr>
                    <c:forEach var="pf" items="$article.pointForms" varStatus="loopStatus" >
                        <tr>
                           <td>Article Point-form</td>
                           <td>
                                <spring:bind path = "pf.pointFormDesc">
                                     <Error messages></Error>
                                     <form:input name = "pointForm" id = "pointForm" path="${pf.pointFormDesc}" value="${pf.pointFormDesc}" size="100" />
                                </spring:bind>
                           </td>
                        </tr>
                    </c:forEach>
                </c:forEach>

The error message is:

10:22:26,607 ERROR [org.springframework.web.servlet.tags.BindTag] (http--192.168.1.20-8080-8) Invalid property 'pf' of bean class [LuxuryLiving.manager.pagebean.ProductBean]: Bean property 'pf' is not readable or has an invalid getter method: Does the return type of the getter match the parameter type of the setter?: org.springframework.beans.NotReadablePropertyException: Invalid property 'pf' of bean class [LuxuryLiving.manager.pagebean.ProductBean]: Bean property 'pf' 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) [spring-beans-3.0.5.RELEASE.jar:3.0.5.RELEASE]
at org.springframework.beans.BeanWrapperImpl.getNestedBeanWrapper(BeanWrapperImpl.java:555) [spring-beans-3.0.5.RELEASE.jar:3.0.5.RELEASE]
at org.springframework.beans.BeanWrapperImpl.getBeanWrapperForPropertyPath(BeanWrapperImpl.java:532) [spring-beans-3.0.5.RELEASE.jar:3.0.5.RELEASE]
at org.springframework.beans.BeanWrapperImpl.getPropertyValue(BeanWrapperImpl.java:697) [spring-beans-3.0.5.RELEASE.jar:3.0.5.RELEASE]
at org.springframework.validation.AbstractPropertyBindingResult.getActualFieldValue(AbstractPropertyBindingResult.java:98) [spring-context-3.0.5.RELEASE.jar:3.0.5.RELEASE]
at org.springframework.validation.AbstractBindingResult.getFieldValue(AbstractBindingResult.java:224) [spring-context-3.0.5.RELEASE.jar:3.0.5.RELEASE]
at org.springframework.web.servlet.supp