Lukasz Lenart <lukaszlen...@apache.org> kirjoitti 21.9.2014 kello 11.48:
> Can you prepare some exact example app?
Would the example snippet at the bottom be enough? It shows a slightly cleaned
version of one form we use. The form basically consists of a table that lists
the users of the system. Each user can be assigned to a user group. This form
sends two arrays to the action updateGroups: one is ”userIds”, which contains
the user ids, and the other one is ”groupIds”, which contains the group ids
(which may be changed via the select-list in the last column).
Struts generates identical id for each input field that gives values to these
two lists. For example if there are 500 users, the html-code output by Struts
will contain 500 snippets that look like:
<input type="hidden" name="userIds" value="4267"
id="updateUserGroups_userIds"/><select name="groupIds"
id="updateUserGroups_groupIds">
Each of these snippets will differ only in what is the value of the first
hidden field. WWW validator will then output hundreds of errors of form
"Duplicate ID updateUserGroups_groupIds” and "Duplicate ID
updateUserGroups_userIds”.
In this particular case the problem might(?) go away if the form used explicit
index notation with the array names ”userIds" and "groupIds", but as far as I
know (e.g. based on the book Struts 2 in Action), the practice of populating
arrays without explicit indexing is quite normal.
-Heikki
<s:form action="updateGroups">
<table class="tablesorter" id=”userTable">
<thead>
<tr>
<th>Name</th>
<th>Login</th>
<th>Email</th>
<th>Group</th>
</tr>
</thead>
<tbody>
<s:iterator var=”user" value=”users">
<tr>
<td>
<s:url action="viewUser" var="viewUserUrl">
<s:param name="userId" value="%{#user.id}" />
</s:url>
<s:a href="%{viewUserUrl}">
${user.lastName}, ${user.firstName}
</s:a>
</td>
<td>${user.login}</td>
<td><a href="mailto:${user.email}";>${user.email}</a></td>
<td>
<s:hidden name="userIds" value="%{#user.id}" />
<s:select list="groupList" name="groupIds"
value="%{groupValues[#user.id]}" />
</td>
</tr>
</s:iterator>
</tbody>
</table>
<p>
<input type="submit" value=”Save changes" />
</p>
</s:form>
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