class Role implements Serializable {
// this is my domain class
private static final long serialVersionUID = 1
String authority
Role(String authority) {
this()
this.authority = authority
}
static constraints = {
authority blank: false, unique: true
}
static mapping = {
cache true
}
}
def indexList(){
render(template: "indexList", model:[roleInstanceList: Role.findAll()])
} // this is the method in the controller that renders the view page 'indexList'
<div class="col-md-12 main-header">Role List</div>
//this is my 'view' gsp page to be rendered
<table class="table manage-table">
<thead>
<tr>
**<g:sortableColumn property="authority"
title="${message(code: 'role.authority.label', default: 'authority')}" />**
</tr>
</thead>
<tbody>
<g:each in="${roleInstanceList}" status="i" var="roleInstance">
<tr id="${roleInstance.id}" class="${(i % 2) == 0 ? 'even' : 'odd'}">
<td>
${fieldValue(bean: roleInstance, field: "authority")}
</td>
</tr>
</g:each>
</tbody>
</table>
Here, when I click on Sortable Column 'authority' - sorting is not done and I am getting a page
refresh with the following URL: role/indexList?sort=authority&order=asc
Any help much appreciated.
Thanks and a note to point that I am new to grails framework
You probably want Role.list(params) instead of Role.findAll().
I am having a lot of difficulty with POSTing back a form to the controller, which should contain simply an arraylist of objects that the user may edit.
The form loads up correctly, but when it's posted, it never seems to actually post anything.
Here is my form:
<form action="#" th:action="#{/query/submitQuery}" th:object="${clientList}" method="post">
<table class="table table-bordered table-hover table-striped">
<thead>
<tr>
<th>Select</th>
<th>Client ID</th>
<th>IP Addresss</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr th:each="currentClient, stat : ${clientList}">
<td><input type="checkbox" th:checked="${currentClient.selected}" /></td>
<td th:text="${currentClient.getClientID()}" ></td>
<td th:text="${currentClient.getIpAddress()}"></td>
<td th:text="${currentClient.getDescription()}" ></td>
</tr>
</tbody>
</table>
<button type="submit" value="submit" class="btn btn-success">Submit</button>
</form>
Above works fine, it loads up the list correctly. However, when I POST, it returns a empty object (of size 0). I believe this is due to the lack of th:field, but anyway here is controller POST method:
...
private List<ClientWithSelection> allClientsWithSelection = new ArrayList<ClientWithSelection>();
//GET method
...
model.addAttribute("clientList", allClientsWithSelection)
....
//POST method
#RequestMapping(value="/submitQuery", method = RequestMethod.POST)
public String processQuery(#ModelAttribute(value="clientList") ArrayList clientList, Model model){
//clientList== 0 in size
...
}
I have tried adding a th:field but regardless of what I do, it causes an exception.
I've tried:
...
<tr th:each="currentClient, stat : ${clientList}">
<td><input type="checkbox" th:checked="${currentClient.selected}" th:field="*{}" /></td>
<td th th:field="*{currentClient.selected}" ></td>
...
I cannot access currentClient (compile error), I can't even select clientList, it gives me options like get(), add(), clearAll() etc, so it things it should have an array, however, I cannot pass in an array.
I've also tried using something like th:field=${}, this causes runtime exception
I've tried
th:field = "*{clientList[__currentClient.clientID__]}"
but also compile error.
Any ideas?
UPDATE 1:
Tobias suggested that I need to wrap my list in a wraapper. So that's what I did:
ClientWithSelectionWrapper:
public class ClientWithSelectionListWrapper {
private ArrayList<ClientWithSelection> clientList;
public List<ClientWithSelection> getClientList(){
return clientList;
}
public void setClientList(ArrayList<ClientWithSelection> clients){
this.clientList = clients;
}
}
My page:
<form action="#" th:action="#{/query/submitQuery}" th:object="${wrapper}" method="post">
....
<tr th:each="currentClient, stat : ${wrapper.clientList}">
<td th:text="${stat}"></td>
<td>
<input type="checkbox"
th:name="|clientList[${stat.index}]|"
th:value="${currentClient.getClientID()}"
th:checked="${currentClient.selected}" />
</td>
<td th:text="${currentClient.getClientID()}" ></td>
<td th:text="${currentClient.getIpAddress()}"></td>
<td th:text="${currentClient.getDescription()}" ></td>
</tr>
Above loads fine:
Then my controller:
#RequestMapping(value="/submitQuery", method = RequestMethod.POST)
public String processQuery(#ModelAttribute ClientWithSelectionListWrapper wrapper, Model model){
...
}
The page loads correctly, the data is displayed as expected. If I post the form without any selection I get this:
org.springframework.expression.spel.SpelEvaluationException: EL1007E:(pos 0): Property or field 'clientList' cannot be found on null
Not sure why it's complaining
(In the GET Method it has: model.addAttribute("wrapper", wrapper);)
If I then make a selection, i.e. tick the first entry:
There was an unexpected error (type=Bad Request, status=400).
Validation failed for object='clientWithSelectionListWrapper'. Error count: 1
I'm guessing my POST controller is not getting the clientWithSelectionListWrapper. Not sure why, since I have set the wrapper object to be posted back via the th:object="wrapper" in the FORM header.
UPDATE 2:
I've made some progress! Finally the submitted form is being picked up by the POST method in controller. However, all the properties appear to be null, except for whether the item has been ticked or not. I've made various changes, this is how it is looking:
<form action="#" th:action="#{/query/submitQuery}" th:object="${wrapper}" method="post">
....
<tr th:each="currentClient, stat : ${clientList}">
<td th:text="${stat}"></td>
<td>
<input type="checkbox"
th:name="|clientList[${stat.index}]|"
th:value="${currentClient.getClientID()}"
th:checked="${currentClient.selected}"
th:field="*{clientList[__${stat.index}__].selected}">
</td>
<td th:text="${currentClient.getClientID()}"
th:field="*{clientList[__${stat.index}__].clientID}"
th:value="${currentClient.getClientID()}"
></td>
<td th:text="${currentClient.getIpAddress()}"
th:field="*{clientList[__${stat.index}__].ipAddress}"
th:value="${currentClient.getIpAddress()}"
></td>
<td th:text="${currentClient.getDescription()}"
th:field="*{clientList[__${stat.index}__].description}"
th:value="${currentClient.getDescription()}"
></td>
</tr>
I also added a default param-less constructor to my wrapper class and added a bindingResult param to POST method (not sure if needed).
public String processQuery(#ModelAttribute ClientWithSelectionListWrapper wrapper, BindingResult bindingResult, Model model)
So when an object is being posted, this is how it is looking:
Of course, the systemInfo is supposed to be null (at this stage), but the clientID is always 0, and ipAddress/Description always null. The selected boolean is correct though for all properties. I'm sure I've made a mistake on one of the properties somewhere. Back to investigation.
UPDATE 3:
Ok I've managed to fill up all the values correctly! But I had to change my td to include an <input /> which is not what I wanted... Nonetheless, the values are populating correctly, suggesting spring looks for an input tag perhaps for data mapping?
Here is an example of how I changed the clientID table data:
<td>
<input type="text" readonly="readonly"
th:name="|clientList[${stat.index}]|"
th:value="${currentClient.getClientID()}"
th:field="*{clientList[__${stat.index}__].clientID}"
/>
</td>
Now I need to figure out how to display it as plain data, ideally without any presence of an input box...
You need a wrapper object to hold the submited data, like this one:
public class ClientForm {
private ArrayList<String> clientList;
public ArrayList<String> getClientList() {
return clientList;
}
public void setClientList(ArrayList<String> clientList) {
this.clientList = clientList;
}
}
and use it as the #ModelAttribute in your processQuery method:
#RequestMapping(value="/submitQuery", method = RequestMethod.POST)
public String processQuery(#ModelAttribute ClientForm form, Model model){
System.out.println(form.getClientList());
}
Moreover, the input element needs a name and a value. If you directly build the html, then take into account that the name must be clientList[i], where i is the position of the item in the list:
<tr th:each="currentClient, stat : ${clientList}">
<td><input type="checkbox"
th:name="|clientList[${stat.index}]|"
th:value="${currentClient.getClientID()}"
th:checked="${currentClient.selected}" />
</td>
<td th:text="${currentClient.getClientID()}" ></td>
<td th:text="${currentClient.getIpAddress()}"></td>
<td th:text="${currentClient.getDescription()}" ></td>
</tr>
Note that clientList can contain null at
intermediate positions. Per example, if posted data is:
clientList[1] = 'B'
clientList[3] = 'D'
the resulting ArrayList will be: [null, B, null, D]
UPDATE 1:
In my exmple above, ClientForm is a wrapper for List<String>. But in your case ClientWithSelectionListWrapper contains ArrayList<ClientWithSelection>. Therefor clientList[1] should be clientList[1].clientID and so on with the other properties you want to sent back:
<tr th:each="currentClient, stat : ${wrapper.clientList}">
<td><input type="checkbox" th:name="|clientList[${stat.index}].clientID|"
th:value="${currentClient.getClientID()}" th:checked="${currentClient.selected}" /></td>
<td th:text="${currentClient.getClientID()}"></td>
<td th:text="${currentClient.getIpAddress()}"></td>
<td th:text="${currentClient.getDescription()}"></td>
</tr>
I've built a little demo, so you can test it:
Application.java
#SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
ClientWithSelection.java
public class ClientWithSelection {
private Boolean selected;
private String clientID;
private String ipAddress;
private String description;
public ClientWithSelection() {
}
public ClientWithSelection(Boolean selected, String clientID, String ipAddress, String description) {
super();
this.selected = selected;
this.clientID = clientID;
this.ipAddress = ipAddress;
this.description = description;
}
/* Getters and setters ... */
}
ClientWithSelectionListWrapper.java
public class ClientWithSelectionListWrapper {
private ArrayList<ClientWithSelection> clientList;
public ArrayList<ClientWithSelection> getClientList() {
return clientList;
}
public void setClientList(ArrayList<ClientWithSelection> clients) {
this.clientList = clients;
}
}
TestController.java
#Controller
class TestController {
private ArrayList<ClientWithSelection> allClientsWithSelection = new ArrayList<ClientWithSelection>();
public TestController() {
/* Dummy data */
allClientsWithSelection.add(new ClientWithSelection(false, "1", "192.168.0.10", "Client A"));
allClientsWithSelection.add(new ClientWithSelection(false, "2", "192.168.0.11", "Client B"));
allClientsWithSelection.add(new ClientWithSelection(false, "3", "192.168.0.12", "Client C"));
allClientsWithSelection.add(new ClientWithSelection(false, "4", "192.168.0.13", "Client D"));
}
#RequestMapping("/")
String index(Model model) {
ClientWithSelectionListWrapper wrapper = new ClientWithSelectionListWrapper();
wrapper.setClientList(allClientsWithSelection);
model.addAttribute("wrapper", wrapper);
return "test";
}
#RequestMapping(value = "/query/submitQuery", method = RequestMethod.POST)
public String processQuery(#ModelAttribute ClientWithSelectionListWrapper wrapper, Model model) {
System.out.println(wrapper.getClientList() != null ? wrapper.getClientList().size() : "null list");
System.out.println("--");
model.addAttribute("wrapper", wrapper);
return "test";
}
}
test.html
<!DOCTYPE html>
<html>
<head></head>
<body>
<form action="#" th:action="#{/query/submitQuery}" th:object="${wrapper}" method="post">
<table class="table table-bordered table-hover table-striped">
<thead>
<tr>
<th>Select</th>
<th>Client ID</th>
<th>IP Addresss</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr th:each="currentClient, stat : ${wrapper.clientList}">
<td><input type="checkbox" th:name="|clientList[${stat.index}].clientID|"
th:value="${currentClient.getClientID()}" th:checked="${currentClient.selected}" /></td>
<td th:text="${currentClient.getClientID()}"></td>
<td th:text="${currentClient.getIpAddress()}"></td>
<td th:text="${currentClient.getDescription()}"></td>
</tr>
</tbody>
</table>
<button type="submit" value="submit" class="btn btn-success">Submit</button>
</form>
</body>
</html>
UPDATE 1.B:
Below is the same example using th:field and sending back all other attributes as hidden values.
<tbody>
<tr th:each="currentClient, stat : *{clientList}">
<td>
<input type="checkbox" th:field="*{clientList[__${stat.index}__].selected}" />
<input type="hidden" th:field="*{clientList[__${stat.index}__].clientID}" />
<input type="hidden" th:field="*{clientList[__${stat.index}__].ipAddress}" />
<input type="hidden" th:field="*{clientList[__${stat.index}__].description}" />
</td>
<td th:text="${currentClient.getClientID()}"></td>
<td th:text="${currentClient.getIpAddress()}"></td>
<td th:text="${currentClient.getDescription()}"></td>
</tr>
</tbody>
When you want to select objects in thymeleaf, you dont actually need to create a wrapper for the purpose of storing a boolean select field. Using dynamic fields as per the thymeleaf guide with syntax th:field="*{rows[__${rowStat.index}__].variety}" is good for when you want to access an already existing set of objects in a collection. Its not really designed for doing selections by using wrapper objects IMO as it creates unnecessary boilerplate code and is sort of a hack.
Consider this simple example, a Person can select Drinks they like. Note: Constructors, Getters and setters are omitted for clarity. Also, these objects are normally stored in a database but I am using in memory arrays to explain the concept.
public class Person {
private Long id;
private List<Drink> drinks;
}
public class Drink {
private Long id;
private String name;
}
Spring controllers
The main thing here is that we are storing the Person in the Model so we can bind it to the form within th:object.
Secondly, the selectableDrinks are the drinks a person can select on the UI.
#GetMapping("/drinks")
public String getDrinks(Model model) {
Person person = new Person(30L);
// ud normally get these from the database.
List<Drink> selectableDrinks = Arrays.asList(
new Drink(1L, "coke"),
new Drink(2L, "fanta"),
new Drink(3L, "sprite")
);
model.addAttribute("person", person);
model.addAttribute("selectableDrinks", selectableDrinks);
return "templates/drinks";
}
#PostMapping("/drinks")
public String postDrinks(#ModelAttribute("person") Person person) {
// person.drinks will contain only the selected drinks
System.out.println(person);
return "templates/drinks";
}
Template code
Pay close attention to the li loop and how selectableDrinks is used to get all possible drinks that can be selected.
The checkbox th:field really expands to person.drinks since th:object is bound to Person and *{drinks} simply is the shortcut to referring to a property on the Person object. You can think of this as just telling spring/thymeleaf that any selected Drinks are going to be put into the ArrayList at location person.drinks.
<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml"
xmlns:th="http://www.thymeleaf.org"
xmlns:layout="http://www.ultraq.net.nz/thymeleaf/layout" >
<body>
<div class="ui top attached segment">
<div class="ui top attached label">Drink demo</div>
<form class="ui form" th:action="#{/drinks}" method="post" th:object="${person}">
<ul>
<li th:each="drink : ${selectableDrinks}">
<div class="ui checkbox">
<input type="checkbox" th:field="*{drinks}" th:value="${drink.id}">
<label th:text="${drink.name}"></label>
</div>
</li>
</ul>
<div class="field">
<button class="ui button" type="submit">Submit</button>
</div>
</form>
</div>
</body>
</html>
Any way...the secret sauce is using th:value=${drinks.id}. This relies on spring converters. When the form is posted, spring will try recreate a Person and to do this it needs to know how to convert any selected drink.id strings into the actual Drink type. Note: If you did th:value${drinks} the value key in the checkbox html would be the toString() representation of a Drink which is not what you want, hence need to use the id!. If you are following along, all you need to do is create your own converter if one isn't already created.
Without a converter you will receive an error like
Failed to convert property value of type 'java.lang.String' to required type 'java.util.List' for property 'drinks'
You can turn on logging in application.properties to see the errors in detail.
logging.level.org.springframework.web=TRACE
This just means spring doesn't know how to convert a string id representing a drink.id into a Drink. The below is an example of a Converter that fixes this issue. Normally you would inject a repository in get access the database.
#Component
public class DrinkConverter implements Converter<String, Drink> {
#Override
public Drink convert(String id) {
System.out.println("Trying to convert id=" + id + " into a drink");
int parsedId = Integer.parseInt(id);
List<Drink> selectableDrinks = Arrays.asList(
new Drink(1L, "coke"),
new Drink(2L, "fanta"),
new Drink(3L, "sprite")
);
int index = parsedId - 1;
return selectableDrinks.get(index);
}
}
If an entity has a corresponding spring data repository, spring automatically creates the converters and will handle fetching the entity when an id is provided (string id seems to be fine too so spring does some additional conversions there by the looks). This is really cool but can be confusing to understand at first.
I'm new java developer and I need your help. I 've seen already questions-answers with similar topic but still I am not sure how to handle it, so I thought to ask for some help.
I am using Liferay 6.2 & Spring and I have a jsp page with my form that edits a caseType. In this form I want to add a checkbox of Roles (to select the permissions). I'd like to be able to display the selected checkboxes when I edit a caseType. My main issue is that I'm not sure which variables to use.
<form:form name="wblCaseType" method="post" modelAttribute="wblCaseType" action="${saveWblCaseType}">
<form:hidden path="wblCaseTypeId" />
<br/>
<table style="margin-left:80px">
<tbody>
<tr>
<td><form:label path="type"><liferay-ui:message key="type"/></form:label></td>
<td><form:input path="type" /><form:errors path="type" cssClass="errorClass" /></td>
</tr>
<tr>
<td><form:label path="createRoleIds"><liferay-ui:message key="roles"/></form:label></td>
<td><form:checkboxes path="createRoleIds" items="${roles}" value="${wblCaseType.createRoleIds}" itemValue="name" itemLabel="roleId" /></td>
</tr>
Thank you in advance for any help!
Alright, I believe I found the solution. My problem was that I didn't have the proper getter/setter in my Dto.
So in my Controller I have the List where the Roles come from (liferay - roles)
#ModelAttribute("roles")
public List<Role> getRoles() {
List<Role> allRoles = new ArrayList<Role>();
try {
allRoles = RoleLocalServiceUtil.getRoles(QueryUtil.ALL_POS,
ueryUtil.ALL_POS);
} catch (SystemException e) {
logger.error("Could Not get any Liferay Roles" + e.getMessage(), e);
}
return allRoles;
}
In my Dto code I have the getter and the Setter that gets/sets a concatenation of Strings.
public String[] getCreateRoleIdsArray() {
return createRoleIds.split(",");
}
public void setCreateRoleIdsArray(String[] selectedRoles) {
Logger.getLogger(this.getClass()).error("setCreateRoleIdsArray");
String selRoles = new String();
for (String role : selectedRoles) {
selRoles = selRoles + "," + role;
}
setCreateRoleIds(selRoles);
}
and finally in my jsp file
<form:form name="wblCaseType" method="post" modelAttribute="wblCaseType"action="${saveWblCaseType}">
<form:hidden path="wblCaseTypeId" />
....
<tr>
<td><form:label path="createRoleIds"><liferay-ui:message key="roles"/></form:label></td>
<c:forEach items="${roles}" var="role">
<td><form:checkbox path="createRoleIdsArray" id="${role.roleId}" label="${role.name}" value="${role.roleId}" /></td>
</c:forEach>
</tr>
I am trying to iterate an ArrayList "sampleBeanList" in my jsp using logic:iterate. Each SampleBean object contains a variable ArrayList "subBeanList" in it. I am using another logic:iterate tag inside the first tag to iterate such that once the form is submitted, I can retrieve the data in the form of ArrayList "sampleBeanList" and also ArrayList "subBeanList" variable for each SampleBean. I added setters and getters accordingly as shown below. But, I am not able to understand the problem because when I am running, I am getting the below error:
"No getter method for property value of bean subBeanElement"
Source Code:
JSP:
<logic:iterate id="toFamilyElement" name="myRolloverForm" property="sampleBeanList" indexId="toFamilyIndex" type="MYRolloverFamilyBean">
<tr>
<td align="center">
<%=sno%>
</td>
<td align="center" rowspan="<bean:write name="toFamilyElement" property="toFamilyListSize"/>">
<bean:write name="toFamilyElement" property="fromFamily"/>
</td>
<td align="center" rowspan="<bean:write name="toFamilyElement" property="toFamilyListSize"/>">
<IMG src="images/rightArrow.png" width="35px" height="30px" />
</td>
<td align="center">
<table width="100%" height="100%" border="1" cellpadding="0" cellspacing="0">
<%int toFamilyListCount = 0; %>
<logic:iterate id="subBeanElement" name="toFamilyElement" property="toFamilyList" indexId="toFamilyListIndex" type="String">
<html:hidden styleId='<%="toFamilyCode[" + toFamilyCount+"]["+toFamilyListCount+"]"%>' indexed="true" name="subBeanElement" property="value"/>
<tr>
<td>
<bean:write name="subBeanElement" property="value"/>
</td>
</tr>
<%toFamilyListCount++; %>
</logic:iterate>
</table>
</td>
</tr>
<%toFamilyCount++;
sno++;%>
</logic:iterate>
MYRolloverForm (form bean which contains SampleBeanList variable):
public class MYRolloverForm extends ActionForm {
private ArrayList<SampleBean> sampleBeanList= new ArrayList<SampleBean>();
public ArrayList<SampleBean> getSampleBeanList() {
return sampleBeanList;
}
public void setSampleBean(ArrayList<SampleBean> sampleBeanList) {
this.sampleBeanList = sampleBeanList;
}
public void setToFamilyElement(int index, SampleBean value) {
this.sampleBeanList.add(value);
}
public SampleBean getToFamilyElement(int index) {
int size = sampleBeanList.size();
while (index >= size) {
sampleBeanList.add(new SampleBean());
size = sampleBeanList.size();
}
return this.sampleBeanList.get(index);
}
}
SampleBean (contains subBeanList):
public class SampleBean implements Serializable {
private ArrayList<String> subBeanList = new ArrayList<String>();
public ArrayList<String> getSubBeanList() {
return subBeanList;
}
public void setSubBeanList(ArrayList<String> subBeanList) {
this.subBeanList = subBeanList;
}
public void setSubBeanElement(int index, String value) {
this.subBeanList.add(value);
}
public String getSubBeanElement(int index) {
int size = subBeanList.size();
while (index >= size) {
subBeanList.add(new String());
size = subBeanList.size();
}
return this.subBeanList.get(index);
}
}
Please suggest a solution!!!
I think you are messing the elements of the list with the properties of each element:
name should be the bean (a SampleBean) and value the name of the property you want to access (subBeanElement):
<logic:iterate id="mySample" name="toFamilyElement" property="toFamilyList" indexId="toFamilyListIndex" type="String">
<html:hidden styleId='<%="toFamilyCode[" + toFamilyCount+"]["+toFamilyListCount+"]"%>' indexed="true" name="mySample" property="subBeanElement"/>
<tr>
<td>
<bean:write name="mySample" property="subBeanElement"/>
</td>
</tr>
<%toFamilyListCount++; %>
</logic:iterate>
I got the problem. I am trying to get the property "value" of a String element in the second logic:iterate loop. This is why I am getting the above error. I modified such that instead of ArrayList, I am using ArrayList where OptionBean is a class defined with "value" variable in it. It resolved my problem. Thanks for the Answer :)
I'm using spring mvc for the first time and I'm trying to display and edit a structure in jsp.
I have a class Snippet, which holds a list of objects of type Sentence:
public class Snippet {
private int id;
private List<Sentence> sentences;
// getters, setters, default constructor
}
public class Sentence {
private int id;
private int scale;
private String text;
// getters, setters, default constructor
}
In my controller I give a new snippet for editing and when user clicks "save" store it to my db, then return another one. Currently the sentences list of the snippet is null:
#RequestMapping("/snippet")
public ModelAndView getSnippet() {
return new ModelAndView("snippet", "snippet", snippetService.getSnippet());
}
#RequestMapping("/save")
public ModelAndView saveSnippet(#ModelAttribute Snippet snippet) {
if(snippet != null && snippet.getSentences() != null && !snippet.getSentences().isEmpty()) {
snippetService.updateSnippet(snippet);
}
return new ModelAndView("snippet", "snippet", snippetService.getSnippet());
}
In my snippet.jsp I'd like to display the snippet sentences with their scale, and on save, pass snippet with sentences and scales to the controller for storage:
<form:form method="post" action="save" modelAttribute="snippet">
...
<c:forEach var="sentence" items="${snippet.sentences}">
<tr>
<td>${sentence.id}</td>
<td>${sentence.text}</td>
<td><input type="range" name="sentence.scale" value="${sentence.scale}"
path="sentence.scale" min="0" max="5" /></td>
</tr>
</c:forEach>
<tr>
<td colspan="4"><input type="submit" value="Save" /></td>
</tr>
I think I have to find the right way to use the path attribute but I can't figure it out.
The JSTL c:forEach tag provides the attribute varStatus, which will expose the loop status to the specified variable. Reference the index of varStatus to obtain the index of the current loop and use that index to specify the index of the collection item you want to bind or display.
<c:forEach var="sentence" items="${snippet.sentences}" varStatus="i">
<tr>
<td>${sentence.id}</td>
<td>${sentence.text}</td>
<td>
<form:input type="range"
name="snippet.sentences[${i.index}].scale"
path="sentences[${i.index}].scale"
min="0" max="5"
/></td>
</tr>
</c:forEach>