绑定形式——freemarker + Spring MVC

Question

I have a problem with binding my object in ftl form. Here is my controller method:

@RequestMapping(method = RequestMethod.POST)
public String saveConfigProperties(@ModelAttribute("configCmdList") ConfigCmdList configCmdList, BindingResult bindingResult) {
    configurationDao.setConfigValues(configCmdList.getConfigurations());
    return "config";
}

and here is part of my ftl:

<form action="" method="POST">
            <@spring.bind "configCmdList" />                    
            <#list configCmdList.configurations as config>
                ${config.name}
            </#list>                            
            <input type="submit" value="submit"/>
        </form>

I have an access to my list of objects which I sent previous using GET method in my ftl, but my object list is null after sending object without modifications back to controller. I tried to bind my configCmdList.configurations and also bind separately each element of that list in loop but without success. What I'm missing?

VairalPatel web page is down and I remember that he wrote good example about freemarker form and spring mvc.

Thanks in advance for your help.

Answer 1

Ok, I resolved an issue. I had to bind each list element and it parameters separately in loop using ${spring.status.expression} and ${spring.status.value}. Here is my code:

<form action="" method="POST">  
            <#list configCmdList.configurations as config>    
                <@spring.bind path="configCmdList.configurations[${config_index}].id"/>
                <input type="hidden" name="${spring.status.expression}" value="${spring.status.value}" />

                <@spring.bind path="configCmdList.configurations[${config_index}].name"/>
                <input type="text" name="${spring.status.expression}" value="${spring.status.value}" />

                <@spring.bind path="configCmdList.configurations[${config_index}].value"/>
                <input type="text" name="${spring.status.expression}" value="${spring.status.value}" />
            </#list>                    
            <input type="submit" value="submit"/>
        </form>

Thank you for your help :)

Answer 2

This is another way to write Caro's solution :

<form action="" method="POST">  
        <#list configCmdList.configurations as config>    
            <input type="hidden" name="configurations[${config_index}].id" value="${config.id}"/>

            <input type="text" name="configurations[${config_index}].name" value="${config.name}"/>

            <input type="text" name="configurations[${config_index}].value" value="${config.value}" />
        </#list>                    
        <input type="submit" value="submit"/>
    </form>

Answer 3

Well this is not an answer for your post but I had similar issue so continuing to reply to have the reference attached for my question.

Can we use square brackets inside spring bind? I read in the documentation that square brackets can also be used as freemarker tags. So when I use square brackets inside spring.bind tag it is considered as tag inside a tag? Even my editor colors say that by ending tag at square bracket. Did it work for you? my editor image showing color difference after square bracket see attached image for color difference.

<@spring.bind path="adminAutoSaleProdForm.frm_bankProdDetails[${id}].frm_productId"/>