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PORemoving items from Spring's AutoPopulatingList
 

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  1. PORemoving items from Spring's AutoPopulatingList
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    <p>I have created a dynamic form using Spring AutoPopulatingList and JQuery. Addition works like a charm, new items are created and persisted to the database. The issue is with deletion: my update method always gets the full list, regardless of deletion of the elements on the browser side.</p> <p>Controller's update method is simple as that</p> <pre><code>@RequestMapping(value = "/user/{id}", method = RequestMethod.POST) @ResponseBody public String updateUser(@PathVariable("id") int id, @ModelAttribute("user") User user, HttpServletRequest request) { userService.update(user); return messageSource.getMessage("user.data_updated", null, request.getLocale()); } </code></pre> <p>User POJO implementation as follows</p> <pre><code>@Entity public class User implements Serializable { ... @OneToMany(targetEntity = Language.class, fetch = FetchType.EAGER, cascade = CascadeType.ALL) private List&lt;Language&gt; languages = new AutoPopulatingList(Language.class); ... } </code></pre> <p>The POST request which goes to my controller looks like that (addition, language 2 added):</p> <pre><code>languages[0].code:pl languages[0].level:Fluent languages[1].code:de languages[1].level:Native languages[2].code:cc languages[2].level:Intermediate </code></pre> <p>and removal(language 1 removed using JQuery <em>.remove()</em> method):</p> <pre><code>languages[0].code:pl languages[0].level:Fluent languages[2].code:cc languages[2].level:Intermediate </code></pre> <p>so from the communication side looks OK, but the user retrieved from @ModelAttribute("user") in updateUser method still has three language elements, all valid (that is not null). Any suggestions? I'm using Spring 3.1.1 and JQuery 1.7.2 if that's relevant.</p> <p>EDIT: The client side code for adding/removal of fields is as follows:</p> <pre><code>$.addLanguage = function() { var newLanguage = $('&lt;input type="text" id="languages' + languagesCounter + '.code" name="languages[' + languagesCounter + '].code" class="langIdentifier"/&gt;' + '&lt;select id="languages' + languagesCounter + '.level" name="languages[' + languagesCounter + '].level" class="langSelect"&gt;' + '&lt;option value="Basic"&gt;Basic&lt;/option&gt;' + '&lt;option value="Intermediate"&gt;Intermediate&lt;/option&gt;' + '&lt;option value="Fluent"&gt;Fluent&lt;/option&gt;' + '&lt;option value="Native"&gt;Native&lt;/option&gt;' + '&lt;/select&gt;' + '&lt;input type="button" id="remove' + languagesCounter + '" onclick="$.removeLanguage(' + languagesCounter + ')"' + 'name="Remove" value="Remove" class="removeButton"/&gt;' + '&lt;br/&gt;'); languagesCounter++; newLanguage.insertBefore($("#add")); } </code></pre> <p>and for removal:</p> <pre><code>$.removeLanguage = function(languageId) { var languageField = '#languages' + languageId + '\\.code'; var levelField = '#languages' + languageId + '\\.level'; var removeButton = '#remove' + languageId; $(languageField).fadeOut(250, function() { $(this).remove(); }); $(levelField).fadeOut(250, function() { $(this).remove(); }); $(removeButton).fadeOut(250, function() { $(this).remove(); }); }; </code></pre>
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