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Java

Posted by Ricardo Sala
Ricardo Sala
16,212 Points

Getting the list of checked checkboxes! :)

In Spark, with Java I am doing a blog.

In a form, how can I get the checked values in a form where all the checkboxes share the same name?

I thought I would get a list of the values but somehow I am only getting the first one...

My html:

               <li th:if="${entry.tags}" th:each="tag,iterStat : ${entry.tags}">
                    <input
                            type="checkbox"
                            name="tags"
                            th:value="|tag-${iterStat.count}|"
                            th:checked="true"
                            th:text="${tag}">

                </li>

and in the controller I am doing:

String editedTags = request.queryParams("tags");

But I am only getting the value of the first checked one, only one...

I've read that I should get them with queryParams method as a String separated by commas...but that 's not the case, I am only receiving the first one

2 Answers

Seth Kroger
Seth Kroger
56,414 Points
Seth Kroger
Seth Kroger
56,414 Points

The name attribute of each checkbox will need to be different if you want to send the values of each one of them. Otherwise with only one name there is only one value sent.

Ricardo Sala
Ricardo Sala
16,212 Points
Ricardo Sala
Ricardo Sala
16,212 Points

But the checkboxes are generated dinamically (one checkbox for each entry tag, and I do not know how many entry tags the user will enter)...

Isn't there to call all the checkboxes the same? after all, they are all the same: tags!

And I would swear I have seen it done just with one name...

Like here: https://www.w3schools.com/tags/tryit.asp?filename=tryhtml_form_checkbox

Seth Kroger
Seth Kroger
56,414 Points
Seth Kroger
Seth Kroger
56,414 Points

OK, after a bit of research it looks like you should use queryParamsValues() instead of queryParams() since it returns an a String[] instead of a single String.