I am working with two classes that have a relationship many-to-many. I insert data in both tables, the relationship is usually registered in JoinTable. My question is, how to display the data from both tables in the same form?
Here is my controller:
#Controller
public class RecipeController {
#Autowired
private ReceitaService receitaService;
#RequestMapping(value = "/novaReceita.do", method = RequestMethod.POST)
public String createRecipes(#ModelAttribute("Receita") Receita receita, BindingResult resultReceita,
#ModelAttribute("Tag") Tag tag, BindingResult resultTag, #RequestParam String action, Map<String, Object> map) {
receita.getTag().add(tag);
receitaService.addReceita(receita);
map.put("receita", receita);
map.put("receitaList", receitaService.getAllReceita());
return "listRecipes";
}
Here is where I am having problems because I can only show data for a single table.
public String editForm(#PathVariable("id") int id, ModelMap map) {
map.addAttribute("receita", receitaService.getReceita(id));
return "updateRecipes";
}
Finally, the JSP page to display the data entered:
<c:url var="url" value="/receita/${receita.id}"/>
<form:form action="${url}" method="GET" commandName="receita">
<table width=80% >
<tr>
<td><strong>ID </strong></td>
<td><form:input path="id" disabled="true" class="input-small"/></td>
</tr>
<tr>
<td><strong>Title </strong></td>
<td><form:input path="titulo" class="input-xlarge"/></td>
</tr>
<tr>
<td valign=top><strong>Desc probl</strong></td>
<td><form:textarea path="desc_prob" class="input-xlarge" rows="3" /></td>
</tr>
<tr>
<td valign=top><strong>Desc soluc</strong></td>
<td><form:textarea path="desc_soluc" class="input-xlarge" rows="6" /></td>
</tr>
<tr>
<td><strong>Tag</strong></td>
<td> <form:input path="tag" disabled="true" class="input-small"/></td>
</tr>
</table>
</form:form>
What is missing to be able to show the data from both tables?
Thank's.
For single column/property you can use <form:input/>For Many to One you can use <form:select/>For One to Many you can use <form:select multiple='true'>In your case, you have to select a single ID first for the one side of the relationship which is receita and then display all the tags in that receita, so i think it counts as One to Many at that point. So in your case, try to use this tag:<form:select path="tag" multiple="true"/>
Related
I am new to JSP and Spring. I want to insert a userID(U0005) using textbox in spring form but it is storing(,U0005). From where the "," is inserted?
The code I have written is:
/* In Register.jsp: */
<c:url var="addAction" value="/libUsr/add"></c:url>
<form:form action="${addAction}" commandName="libUsr">
<table>
<tr>
<td>
<form:label path="id">
<spring:message text="ID" />
</form:label>
</td>
<td><form:input path="id" required="true" /></td>
</tr>
</table>
</form:form>
/*
In UserController.java:
*/
#RequestMapping(value= "/libUsr/add", method = RequestMethod.POST)
public String addLibUsr(#ModelAttribute("libUsr") LibUsr libUsr){
libUsrDAO.saveOrUpdate(libUsr);
return "redirect:/register";
}
/*
In DAOImpl:
Saving the data through DAOs
*/
#Transactional
public void saveOrUpdate(LibUsr libusr) {
sessionFactory.getCurrentSession().saveOrUpdate(libusr);
}
Your problem is with this tag:
<form:label path="id">
As you are adding the attribute path to one label, which wont store any value, spring try to get the value and returns empty,yourID.
Change the path attribute of your label to:
<form:label for="id">
<spring:message text="ID" />
</form:label>
If you want to show the value of the id into that label use:
<label>${yourObject.id}</label>
or
<label th:value="${yourObject.id}"></label>
Path attribute is just for input, select, checkbox...not static values as label, span...
I want to bind a List using ModelAttribute. The list contains objects of type Transaction each of which contains transactionid (type int). This is my controller code:
#RequestMapping(value = "/approvecreditdebit.do", method = RequestMethod.POST)
public ModelAndView doActions(HttpServletRequest request,
#ModelAttribute("clc") Clc transactionList, BindingResult result,
ModelMap model) {
/*
* switch (action) { case "approve":
*/
System.out.println("Obj = " + transactionList.getClass());
System.out.println("Val = " + transactionList.getTransactionList());
Users users = new Users();
return new ModelAndView("internal","internal",users);
}
This is my jsp code:
<form:form action="approvecreditdebit.do" method="POST"
modelAttribute="clc">
<table border="1">
<tr>
<th>no</th>
<th>ID</th>
</tr>
<c:forEach items="${clc.transactionList}"
var="transaction" varStatus="status">
<tr>
<td>${status.index}</td>
<td><input name = "transaction[${status.index}].transactionId"
value="${transaction.transactionId}" /></td>
</tr>
</c:forEach>
</table>
<br>
<br>
<center>
<input type="submit" value="approve" />
</center>
</form:form>
This is the Clc class:
public class Clc{
private List<Transaction> transactionList;
public List<Transaction> getTransactionList() {
return transactionList;
}
public void setTransactionList(List<Transaction> transactionList) {
this.transactionList = transactionList;
}
}
The value of transactionList is not being set to the values received from the form. I receive the following error:
Request processing failed; nested exception is java.lang.NullPointerException
I tried searching for the solution on google and got a lot of solutions from stackoverflow but none of them seem to work.
Try something like this (notice the use of <form:input>). I just tried it on a simple Spring MVC app and it works (list is not null and has the values from the form when I try to access it in my POST method).
<c:forEach var="transaction" varStatus="status" items="${clc.transactionList}">
<tr>
<td>${status.index}</td>
<td><form:input path="transactionList[${status.index}].id" /></td>
</tr>
</c:forEach>
I have a controller which sets few values to a model and sends to jsp. In jsp i need to show those values(as labels) along with additional values from user as input values. When i submit the jsp i only get valid values that user has entered and the values set earlier by controller is null.
JSP
<form:form
action="${pageContext.request.contextPath}/admin/deviceAction.html"
modelAttribute="deviceData">
<table class="gridtable" width="500px">
<tr>
<td>Device Name : </td>
<td>${deviceData.deviceName}</td>
</tr>
<tr>
<td>Model Name : </td>
<td>${deviceData.modelName}</td>
</tr>
<tr>
<td>Serial No : </td>
<td>${deviceData.serialNo}</td>
</tr>
<tr>
<td>Device Id : </td>
<td>${deviceData.deviceId}</td>
</tr>
<tr>
<td>Status : </td>
<td>${deviceData.statusCode}</td>
</tr>
<tr>
<td>Action : <span class="required">*</span></td>
<td>
<form:select path="deviceAction" >
<form:option value="" label="--- Select ---" />
<form:options items="${model.actionList}" />
</form:select>
</td>
</tr>
</table>
<input type="submit" value="Submit" id="btn_submit">
</form:form>
Controller:
public ModelAndView beforeSubmit() {
ModelAndView modelView = new ModelAndView();
DeviceData deviceData = new DeviceData();
deviceData.setDevicePk("123");
deviceData.setAccessToken("abcwetrwertewrtetr");
deviceData.setDeviceId("deferterterterterwtetetertg");
deviceData.setDeviceName("test");
deviceData.setEnrolledDate("7-8-13");
deviceData.setModelName("test1");
deviceData.setSerialNo("test2dsfgdfgdfg");
deviceData.setStatusCode("test3");
List<String> actionList = getActionList();
Map<String, List<String>> model = new HashMap<String, List<String>>();
model.put("actionList", actionList);
modelView.addObject("deviceData", deviceData);
modelView.addObject("model", model);
modelView.setViewName("admin/tokenSearchResult");
}
public ModelAndView afterSubmit() {
#ModelAttribute("deviceData") DeviceData deviceData, BindingResult result) {
logger.info("#################device datas are : " + deviceData.getDevicePk() + "###### " + deviceData.getDeviceAction());
return new ModelAndView();
}
deviceData.getDevicePk() is null
Only the drop down value is having valid value. Other values displayed in the screen are received as null.
Edit:
Till now i have found only one solution:
<form:input path="deviceName" readonly="true" />
But this way UI does not looks good. The editable and non editable values mixup in the screen. Looking for a better answer
Finally i am using hidden parameters to solve the problem.
Example:
<td>${deviceData.deviceName}</td>
is replaced by:
<td><form:hidden path="deviceName"</td>
By this way it helps me to avoid any css work(which i am not much comfortable)
If anyone get a better solution kindly post it here
You need to make them into form inputs using the Spring form tags in much the same way as you have for the form:select. If they are not editable by the user, you can always disable them.
You can simple hide those input. For example :
<input type="hidden" name="VehSeriesModelId" value="${vehDetailsVM.id }">
This way, you can get the data to the controller and the user will also not be able to edit the value. On the other hand, your form will also not show it :)
Why doesn't the server see my list of filled checkboxes?
This question seems to be here asked many times, but the details are so different for each requester that it seems a different answer is needed each time. Here is my story.
These are my data-bearing classes. The Offer contains a list of Filter objects in the filter attribute:.
public class Offer implements Serializable {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
#Column(name="id")
private Long id = null;
#Column(name="title")
private String title = null;
[snip]
#ManyToMany(fetch=FetchType.EAGER)
#JoinTable(name = "offer_filter",
joinColumns = { #JoinColumn(name = "offer_id", nullable = false, updatable = false) },
inverseJoinColumns = { #JoinColumn(name = "filter_id", nullable = false, updatable = false) })
private List<Filter> filters;
[snip]
}
public class Filter implements Serializable {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
#Column(name="id")
private Long id;
#NotBlank
#Length(max=100)
#Column(name="text")
private String text;
[snip]
#Transient
private boolean owned = false;
[snip]
}
The simple controller sends the offerEdit.jsp page, with a fully-populated Offer object. The object contains a list of Filters. Because of the owned attribute, only one of the three Filters is pre-checked. This simulates my eventual plan, where the list of Filters is the whole universe and what the Offer owns is a subset.
Note the annotations, that the Offer has the filter list going to the web page but doesn't see it coming back.
public class OfferController {
[snip]
#RequestMapping(value = "/edit", method = RequestMethod.GET)
public String getEdit(#RequestParam("id") Long id, Model model, HttpSession session) {
Offer offerAttribute = offerService.get(id);
// At this point, offerAttribute.filters has three elements.
// Mockup -- tells web page that only the middle one of the three Filters should be checked.
List<Filter> filters = offer.getFilters();
Filter filter = filters.get(1);
filter.setOwned(true);
model.addAttribute("offerAttribute", offerAttribute);
return "offer/offerEdit";
}
#RequestMapping(value = "/edit", method = RequestMethod.POST)
public String postEdit(#RequestParam("id") Long id, #Valid #ModelAttribute("offerAttribute") Offer offerAttribute, BindingResult result, HttpSession session, Model model) {
// At this point, offerAttribute.filters is null.
if(result.hasErrors()) {
result.reject("offer.invalidFields");
return "offer/offerEdit";
}
offerAttribute.setId(id);
offerService.edit(offerAttribute);
return "redirect:/offer/list";
}
[snip]
}
The web page has this for its checkbox section. I use form:checkbox over form:checkboxes because I want to use a table,
[snip]
<form:form modelAttribute="offerAttribute" method="POST" action="${saveUrl}">
<table>
<tr>
<td></td>
<td><form:hidden path="id" /></td>
</tr>
<tr>
<td><form:label path="title">Title:</form:label></td>
<td><form:input path="title" size="80" /></td>
<td><form:errors path="title" cssClass="error" /></td>
</tr>
[snip]
</table>
<table>
</table>
<table>
<c:forEach items="${offerAttribute.filters}" var="filter">
<tr>
<td><form:checkbox
path="filters"
label="${filter.text}"
value="${filter.id}"
checked="${filter.owned ? 'true' : ''}" />
</td>
</tr>
</c:forEach>
</table>
[snip]
The displayed web page has three filter checkboxes displayed, with just the middle checkbox filled in.
For the returned list, I expect the server to get only the middle checkbox, which is just what I want.
Here is what the generated checkboxes look like as source:
<table style="border: 1px solid; width: 100%; text-align:left;">
<tr>
<td>
<input id="filters1" name="filters" type="checkbox" value="1"/>
<label for="filters1">Adults (18+) desired, please</label>
<input type="hidden" name="_filters" value="on"/>
</td>
</tr>
<tr>
<td>
<input id="filters2" name="filters" checked="true" type="checkbox" value="2"/>
<label for="filters2">Quiet audiences, please</label>
<input type="hidden" name="_filters" value="on"/>
</td>
</tr>
<tr>
<td>
<input id="filters3" name="filters" type="checkbox" value="4"/>
<label for="filters3">Filter Text First</label>
<input type="hidden" name="_filters" value="on"/>
</td>
</tr>
</table>
My checkbox is set, and in the HTML. To restate my question,
Why doesn't the checkbox value get seen in the controller's POST handler?
Thanks for any answers,
Jerome.
The values of checkboxes could not be directly bind to List.
To get this working you need to create a simple pojo databean that will hold the values of your form fields in jsp. And in that databean to bind the values you need to declare int[] filterId and the values of your checkboxes will bind in that array.
Hope this helps you.
After a lot of web research and different debugging sessions, I came up with a configuration I can live with.
In my controller I provide a model attribute of "filterList", containing List. The "offerAttribute" is an Offer object, containing List filters.
The view has this sequence:
<table>
<c:forEach items="${filterList}" var="filter" varStatus="status">
<tr>
<td><input type="checkbox" name="filters[${status.index}].id"
value="${filter.id}"
${filter.owned ? 'checked' : ''} /> ${filter.text}
</td>
</tr>
</c:forEach>
</table>
When the POST is done the ownerAttribute.filters list is just as long as the original filterList object that created the checkboxes. The checked ones contains a Filter.id value. The unchecked ones contain a null. (That is, the returned filters list is "sparse".) If the user clicks on just a few checkboxes then I must parse the returned list to find those that were chosen.
Once I know the ID values of the checked-on filters, I fetch each of them through Hibernate, put them into my reconstructed Offer object and then persist them to the database.
I realize that I'm not (currently) using the form:checkbox. But it works, and I'm pressed for time here. I'll come back later, perhaps, and see what form:checkbox can do for me.
I have the below table in a .JSP page:
<form:form method="post" action="update.dtt" id="contactForms" modelAttribute="contactForms" >
<c:forEach items="${pList}" var="cf">
<tr>
<td align="center"><c:out value="${cf.fname}" /></td>
<td align="center"><c:out value="${cf.lname}" /></td>
<td align="center"><c:out value="${cf.cprovider}" /></td>
<td align="center"><c:out value="${cf.id}" /></td>
<td align="center"><c:out value="${cf.phone}" /></td>
<td><input type="submit" value="Update Contact"/></td>
</tr>
</c:forEach>
</form:form>
I'm iterating over the list (this is list of objects) and adding an Update Contact button for each record in the list. How can I pass on the particular instance (object) to the controller when the Update button is clicked?
The controller I have is as below. However I'm getting null.
#RequestMapping(value = "/user/update.dtt", method = RequestMethod.POST)
public String updateView(#ModelAttribute("contactForms") Banks bank, HttpServletRequest request, HttpServletResponse response, Model model) {
System.out.println("*First Name*" + bank.getFname());
//......
return "detailBank"; //name of jsp file
}
You'll need to have a hidden form field for each information you want to send to the server.
Since you have one button for each row, you should also have one form for each row. So the <form:form> and </form:form> lines should be inside the <c:forEach>, and not outside.
You need reference the instance by position, accessing to the element of the list by position.
list[i].name
list[i].surname
where list is the element in your pojo.