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POBind elements to a list with spring mvc ModelAttribute
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copied!<p>The question is based on <a href="https://stackoverflow.com/questions/13358950/getting-a-spring-model-attribute-list-element-using-an-index-from-javascript">getting a spring model attribute list element using an index from javascript</a> on wich explains that each name of the html element must contain an index. Example user[0]</p> <p>I have a form that allows the user to dinamically add or remove elements from the list before submitting it. Let me put an example: we add 3 users, so the form will now contain 3 inputs:</p> <pre><code><input name="user[0].name" type="text" /> <input name="user[0].surname" type="text" /> <input name="user[1].name" type="text" /> <input name="user[1].surname" type="text" /> <input name="user[2].name" type="text" /> <input name="user[2].surname" type="text" /> </code></pre> <p>If we submit this, we'll have 3 users each having a name and a surname. But, the problem comes when we try to remove the user[1] because I en up with this html:</p> <pre><code><input name="user[0].name" type="text" /> <input name="user[0].surname" type="text" /> <input name="user[2].name" type="text" /> <input name="user[2].surname" type="text" /> </code></pre> <p>If we submit this form, springs still creates 3 users but the user[1] will have null values for the name and surname. </p> <p>I know that I can handle input names to always have a "correct" form. But is there another solution? I thought that a form like </p> <pre><code><input name="user[].name" type="text" /> <input name="user[].surname" type="text" /> <input name="user[].name" type="text" /> <input name="user[].surname" type="text" /> </code></pre> <p>may solve the problem but then I realized: how can spring know wich name comes with wich surname.</p> <p>Any idea on a better solution?</p>

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