CODEWITHSUNDEEP
javajspspring-mvc
Eugene
Eugene

Reputation: 5543

How to pass several parameters from view to controller's method

Can you tell me how to pass several parameters from the view to the controller's function in the most convenient way?

JSP-view:

<h2>${topic.getName()}</h2>
<h3>${topic.getText()}</h2>

<form:form method="post" commandName="newComment">
    <fieldset>
        <div class="editor-label">
            <td><form:label path="text">Input comment</form:label></td>
        </div>

        <div class="textarea">
            <form:textarea path="text" />
        </div>

        <p>
            <input type="submit" value="Comment" />
        </p>
    </fieldset>
</form:form>

As you can see, we have topic and newComent properties, which represent topic and comment entities.
Here is a controller:

@RequestMapping(value = "/addComment/{topicId}", method = RequestMethod.POST)
public String saveComment(@ModelAttribute("newComment")Comment comment, BindingResult result, Model model){

    validate(comment, result);
    if (result.hasErrors() )
        {
            return "//";
        }
        return "redirect:details/";
    }
}

the comment entity is recognized fine but i need an instance of Topic object (or it's ID) as well. An instance of topic object was accessible in the view, and topic ID is a part of a response. Can you give me an idea how can I deal with this problem?

Upvotes: 1

Views: 289

Answers (1)

km1
km1

Reputation: 2443

Can you get the topic model if you have the topicId? It's in your path. You can get it by adding @PathVariable annotation in your method parameters.

public String saveComment(@PathVariable String topicId, @ModelAttribute("newComment")Comment comment, BindingResult result, Model model){

Upvotes: 1

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