Using Vaadin 14.7.0.
Inside a CRUD editor (Enhanced CRUD Editor) I'm building various fields, amongst which I have a Select.
The Select is initialized with a list of options but I'm also trying to change the items from CRUD form edit to CRUD form edit depending on changes from my underlying database so that the user can select new values.
BindingBuilder<Item, SelectOption> bindingBuilder = binder.forField(s);
if (prop.isMandatory()) {
bindingBuilder.asRequired(requiredI18n);
}
bindingBuilder.bind(new ValueProvider<Item, SelectOption>() {
private static final long serialVersionUID = 1L;
#Override
public SelectOption apply(final Item item) {
ListPropertyDefinition lp = ((ListPropertyDefinition)prop);
Serializable currentValue = item.get(lp.getName());
Collection<SelectOption> sOptions = null;
if (lp.getSelectOptions() != null) {
ListDataProvider<SelectOption> ldp = (ListDataProvider)s.getDataProvider();
sOptions = ldp.getItems();
} else {
sOptions = getNewOptions(item, prop.getName());
s.setItems(sOptions);
}
return new SelectOption("N/A", currentValue);
}
}, new Setter<Item, SelectOption>() {
private static final long serialVersionUID = 1L;
#Override
public void accept(final Item bean, final SelectOption fieldvalue) {
bean.set(prop.getName(), fieldvalue != null ? fieldvalue.getValue() : null);
}
});
Now, if the s.setItems(sOptions) branch is being called then the Select field gets populated with the new values sent by the backend but when I'm saving the item the value that I get is null, regardless of what I select in the select field.
This does not happen when I do not change the items in the select field (i.e. if branch).
I did some debugging for comparing 2 select fields - one that changes its values on the fly and one that has values that don't change... from what I could see the field that has values changing on the fly has a null buffered value as seen in the attached image:
vs the field that does not have its values modified in the binder's apply method:
Not sure if what I'm doing is the right way of "refreshing" a select field's values and / or what should I do so that I get the selected value back in the bean on CRUD form save.
I think you are doing things in overly complicated manner. Based on your code I think your principal challenge is how to set empty selection to be "N/A"
For that you simply need to enable empty selection to be allowed. You need to have one placeholder item for empty selection, for which you generate "N/A" as caption. Then you can just do:
Binder<Item> binder = new Binder<>();
Select<SelectOption> select = new Select<>();
...
select.setEmptySelectionAllowed(true);
select.setEmptySelectionCaption("N/A");
binder.forField(s).bind(Item::getProperty,Item::setProperty);
public class SelectOption {
...
}
// Make the item bean also to follow POJO convention
public class Item {
private SelectOption property;
public SelectOption getProperty() {
return property;
}
public void setProperty(SelectOption property) {
this.property = property;
}
}
Related
Am using radgrid and creating it in aspx but on certain action i add more GridTemplateColumns to the grid.
private void CreateDateColumns(List<DateTime> occurenceList)
{
if (occurenceList != null && occurenceList.Count > 0)
{
int index = 1;
foreach (DateTime occurence in occurenceList)
{
string templateColumnName = occurence.Date.ToShortDateString();
GridTemplateColumn templateColumn = new GridTemplateColumn();
templateColumn.ItemTemplate = new MyTemplate(templateColumnName, index);
grdStudentAttendanceList.MasterTableView.Columns.Add(templateColumn);
templateColumn.HeaderText = templateColumnName;
templateColumn.UniqueName = templateColumnName;
index++;
}
}
}
private class MyTemplate : ITemplate
{
protected RadComboBox rcbAttendance;
private string colname;
private int _index;
public MyTemplate(string cName, int index)
{
colname = cName;
_index = index;
}
public void InstantiateIn(System.Web.UI.Control container)
{
rcbAttendance = new RadComboBox();
rcbAttendance.Items.Add(new RadComboBoxItem("---Select---", "-1"));
rcbAttendance.Items.Add(new RadComboBoxItem("Present", "1"));
rcbAttendance.Items.Add(new RadComboBoxItem("Absent", "2"));
rcbAttendance.Items.Add(new RadComboBoxItem("Leave", "3"));
rcbAttendance.ID = "rcbAttendance" + _index;
container.Controls.Add(rcbAttendance);
}
}
All are fine with creation but when i press save button or any combobox make postback the only dynamically generated columns content disappear and the other columns stay.
What i noticed that columns still in place with headertext but only content are disappeared (in my case content are comboboxes)
After enabling viewstate for grid only header text appear.
What should i do to keep columns contents after postback and get their values ?
When creating template columns programmatically, the grid must be generated completely in the code-behind using the Page_Init event. Then, you must create the templates dynamically in the code-behind and assign them to the ItemTemplate and EditItemTemplate properties of the column. To create a template dynamically, you must define a custom class that implements the ITemplate interface. Then you can assign an instance of this class to the ItemTemplate or EditTemplateTemplate property of the GridTemplateColumn object.
Blockquote
Column templates must be added in the Page_Init event handler, so that the template controls can be added to the ViewState.
Blockquote
Source: Telerik
Basicly, you need to create all GridTemplateColumns in the Page_Init. We had the same problem and this approach fixed it.
I have a java class:
public Task {
private int id;
private Company sender;
private Company receiver;
//Getter and Setter
...
}
As you can see, I have 2 other custom classes in the task class. And a company has for example Adress and Directory.
I have a CompanyPanel which will reusable be used on the Page. Here is some code from the panel.
public class CompanyPanel extends Panel {
protected List<Company> companies;
public CompanyPanel(String id, IModel<Company> model) {
super(id,new CompoundPropertyModel<Company>(model));
companies = new ArrayList<Company>();
Company company_1 = new Company();
//Setting default predefined values for the company, so I can select it from the dropdown and to set fields automatically
company_1.setFtpAdress("adress1.com");
company_1.setFtpDir("/MusterDir/");
companies.add(company_1);
//SAME for another company
...
companies.add(comany_2);
...
final DropDownChoice<Company> companyList = new DropDownChoice<Company>("companies", model,
new LoadableDetachableModel<List<Company>>() {
#Override
protected List<Company> load() {
return companies;
}
}){
protected boolean wantOnSelectionChangedNotifications() {
return true;
}
};
add(companyList);
final TextField<String> ftpAdress = new TextField<String>("ftpAdress");
ftpAdress.setOutputMarkupId(true);
add(ftpAdress);
final TextField<String> ftpDir = new TextField<String>("ftpDir");
ftpDir.setOutputMarkupId(true);
add(ftpDir);
//added Ajax to dropdown to update textfields automatically, based on selection of dropdown
companyList.add(new AjaxFormComponentUpdatingBehavior("onchange")
{
#Override
protected void onUpdate(AjaxRequestTarget target)
{
target.add(ftpAdress);
target.add(ftpDir);
}
});
}
}
In the Page I use reuseable CompanyPanels.
...
CompanyPanel senderPanel = new CompanyPanel("senderPanel", new PropertyModel(task,"sender"));
senderPanel.setOutputMarkupId(true);
form.add(senderPanel);
CompanyPanel receiverPanel = new CompanyPanel("receiverPanel", new PropertyModel(task,"receiver"));
receiverPanel.setOutputMarkupId(true);
form.add(receiverPanel);
...
When I submit the form I do:
public void onSubmit(AjaxRequestTarget target, Form<?> form) {
//doSomething
target.add(senderPanel);
target.add(receiverPanel);
}
The problem: The company panel is not being rerendered. And I don't really know why.
Workflow:
I select a company from the dropdown panel
The TextFields(which are inside the companyPanel) will be set correctly, based on the dropdown
I modify a textField (which belongs to a company)
I submit the form
I change the company from the dropdown list
I change back to the first company -> PROBLEM: the modified textfields displays still the modified text inside. It was not reseted to the default values.
Any help very appreciated.
Of course they will display the modified values. You create a list of companies in the CompanyPanel constructor. When you modify a company's data, the object is modified inside that list.
A quick way to fix this would be to replace the CompanyPanel panel with a new instance of CompanyPanel in your onSubmit method. That would recreate the list of companies with your default values. You would of course lose the modified values.
Another possibly better fix is to move the companies list creation into the loadabledetachablemodel:
final DropDownChoice<Company> companyList = new DropDownChoice<Company>("companies", model,
new LoadableDetachableModel<List<Company>>() {
#Override
protected List<Company> load() {
List<Company>companies = new ArrayList<Company>();
Company company_1 = new Company();
//Setting default predefined values for the company, so I can select it from the dropdown and to set fields automatically
company_1.setFtpAdress("adress1.com");
company_1.setFtpDir("/MusterDir/");
companies.add(company_1);
//SAME for another company
...
companies.add(comany_2);
...
return companies;
}
This way the list of companies is recreated on every request with the default values.
Make sure you implement a proper equals() and hashCode() method in Company though for DropDownChoice to show the proper selected element though - because in this scenario the object in your model and the objects in the list may never be ==.
You have to provide more code. If you submit the correctly so that the model changes try:
senderPanel.modelChanged();
receiverPanel.modelChanged();
target.add(senderPanel);
target.add(receiverPanel);
I am implementing a custom module in Orchard to track the number of views for each content item. In my handler, I am checking to see if the content item's type is the default Orchard "Page" type, but right now it is using the Equals function and magic strings. Here's my code:
public class ContentItemViewRecordHandler : ContentHandler
{
private readonly IOrchardServices services;
private readonly IRepository<ContentItemViewRecord> repository;
public ContentItemViewRecordHandler(IOrchardServices services, IRepository<ContentItemViewRecord> repository)
{
this.services = services;
this.repository = repository;
OnGetDisplayShape<CommonPart>(RecordView);
}
private void RecordView(BuildDisplayContext context, CommonPart part)
{
var contentItemType = context.ContentItem.ContentType;
// THIS IS THE IF STATEMENT IN QUESTION
if (!contentItemType.Equals("Page", StringComparison.CurrentCultureIgnoreCase))
{
return;
}
var contentItemViewRecord = new ContentItemViewRecord
{
ContentItemRecordId = context.ContentItem.Id,
Username = services.WorkContext.CurrentUser.UserName,
HostAddress = services.WorkContext.HttpContext.Request.UserHostAddress,
DateCreated = DateTime.UtcNow
};
repository.Create(contentItemViewRecord);
}
}
Anyone know if there is a way to determine the content item's type without the magic strings?
Content types are not .NET types. They are dynamic entities that only exist at runtime. Strings are therefore perfectly fine to identify them.
I have some custom fields on my User object that I want to access with APEX code in my VisualForce trigger. When I access it from a Formula field I get to use a nifty $User reference like this:
$User.my_prop__c
From APEX I have to query the User object by UserId like this:
[select my_prop__c from User where id = :UserInfo.getUserId()].my_prop__c;
Is there something baked into APEX already that would let me get at the user properties without the SOQL query? If not, does anyone know of a utility class for lazy loading and caching user properties so the overhead is minimal.
I would use something similar to the following code sample. It uses a singleton pattern to statically store the information in memory for the duration of your transaction. It's similar to the lazy loading that twamley proposed but I feel this is a much simpler approach.
Usage 1: UserUtil.CurrentUser.Email;
Usage 2: User someUser = UserUtil.getUser(someUserId);
This will allow you to access the same information on the current user or other users in the system. Notice the queryUsers method just returns a query result. This makes it easy to add and remove fields from your query as it is isolated in its own method keeping things simple.
Note: that this code pulls in all users when used. Most orgs do not have multiple hundreds of users so heap size shouldn't be a concern. But if it is you can just modify the queryUsers() method to only return active users or filter down based on other criteria.
public class UserUtil {
//Protected Members
private static final UserUtil instance = new UserUtil();
private Map<Id, User> mapUsers;
//Properties
public static User CurrentUser {
get { return getUser(UserInfo.getUserId()); }
}
//Constructor
private UserUtil() {
mapUsers = new Map<Id, User>(queryUsers());
}
//Public Methods
public static User getUser(Id userId) {
if (instance.mapUsers.containsKey(userId)) {
return instance.mapUsers.get(userId);
}
else {
throw new InvalidUserIdException('Unable to locate user id: ' + userId);
}
}
//Private Methods
private List<User> queryUsers() {
return [SELECT
Id
, Name
, UserName
, Email
, Alias
FROM
User];
}
//Internal Classes
public class InvalidUserIdException extends Exception {}
}
I wrote my own utility class. I'm still interested in better techniques though.
This utility class lazy loads when the first property is accessed. Update_Closed_Won_Opportunities__c and Set_Opportunities_to_Closed_Won__c are my custom fields on the User object (visible only to System Administrators so people can't upgrade their permissions).
public with sharing class MyUserInfo {
private Id userId;
private User myUser; // Hold onto the user object once we've loaded it
// Default constructor uses the active user id
public MyUserInfo() {
userId = UserInfo.getUserId();
}
// Secondary constructor accepts a user id as a parameter
public MyUserInfo(Id someOtherUserId) {
userId = someOtherUserId;
}
// Only called one time when we first need it so grab all of the custom fields now
private void LazyLoadUser() {
System.AssertNotEquals(null, userId);
myUser = [
SELECT Update_Closed_Won_Opportunities__c, Set_Opportunities_To_Closed_Won__c
FROM User
WHERE id = :userId
];
System.AssertNotEquals(null, myUser, 'Unable to load user with id ' + userId); // could return defaults instead
}
// Getters (be sure to include each field in the SOQL of LazyLoadUser)
public boolean UpdateClosedWonOpportunities { get {
if (myUser == null) LazyLoadUser();
return myUser.Update_Closed_Won_Opportunities__c;
} }
public boolean SetOpportunitiesToClosedWon { get {
if (myUser == null) LazyLoadUser();
return myUser.Set_Opportunities_To_Closed_Won__c;
} }
}
Here is my trigger utilizing that class. The first line myUserInfo = new MyUserInfo(); doesn't run any SOQL. That won't happen until the first custom get property is used. Subsequent calls don't need SOQL.
trigger LockClosedOpportunity on Opportunity (before update) {
MyUserInfo myUserInfo = new MyUserInfo();
for (Opportunity o : trigger.old)
{
if (!myUserInfo.UpdateClosedWonOpportunities && o.StageName == 'Closed Won')
trigger.newMap.get(o.Id).addError('You do not have permission to change an Opportunity after it has been set to Closed Won.');
}
for (Opportunity o : trigger.new)
{
if ( !myUserInfo.SetOpportunitiesToClosedWon && o.StageName == 'Closed Won' && trigger.oldMap.get(o.Id).StageName != 'Closed Won' )
o.addError('You do not have permission to set an Opportunity to Closed Won.');
}
}
It reads similar to $User in formulas and I don't have to worry about tacking on multiple SOQL calls when one (or zero) suffices.
I'm using SPMetal in order to generate entity classes for my sharepoint site and I'm not exactly sure what the best practice is to use when there are multiple content types for a single list. For instance I have a task list that contains 2 content types and I'm defining them via the config file for SPMetal. Here is my definition...
<List Member="Tasks" Name="Tasks">
<ContentType Class="LegalReview" Name="LegalReviewContent"/>
<ContentType Class="Approval" Name="ApprovalContent"/>
</List>
This seems to work pretty well in that the generated objects do inherit from WorkflowTask but the generated type for the data context is a List of WorkflowTask. So when I do a query I get back a WorkflowTask object instead of a LegalReview or Approval object. How do I make it return an object of the correct type?
[Microsoft.SharePoint.Linq.ListAttribute(Name="Tasks")]
public Microsoft.SharePoint.Linq.EntityList<WorkflowTask> Tasks {
get {
return this.GetList<WorkflowTask>("Tasks");
}
}
UPDATE
Thanks for getting back to me. I'm not sure how I recreate the type based on the SPListItem and would appreciate any feedback.
ContractManagementDataContext context = new ContractManagementDataContext(_url);
WorkflowTask task = context.Tasks.FirstOrDefault(t => t.Id ==5);
Approval a = new Approval(task.item);
public partial class Approval{
public Approval(SPListItem item){
//Set all properties here for workflowtask and approval type?
//Wouldn't there be issues since it isn't attached to the datacontext?
}
public String SomeProperty{
get{ //get from list item};
set{ //set to list item};
}
Linq2SharePoint will always return an object of the first common base ContentType for all the ContentTypes in the list. This is not only because a base type of some description must be used to combine the different ContentTypes in code but also it will then only map the fields that should definitely exist on all ContentTypes in the list. It is however possible to get access to the underlying SPListItem returned by L2SP and thus from that determine the ContentType and down cast the item.
As part of a custom repository layer that is generated from T4 templates we have a partial addition to the Item class generated by SPMetal which implements ICustomMapping to get the data not usually available on the L2SP entities. A simplified version is below which just gets the ContentType and ModifiedDate to show the methodology; though the full class we use also maps Modified By, Created Date/By, Attachments, Version, Path etc, the principle is the same for all.
public partial class Item : ICustomMapping
{
private SPListItem _SPListItem;
public SPListItem SPListItem
{
get { return _SPListItem; }
set { _SPListItem = value; }
}
public string ContentTypeId { get; internal set; }
public DateTime Modified { get; internal set; }
public virtual void MapFrom(object listItem)
{
SPListItem item = (SPListItem)listItem;
this.SPListItem = item;
this.ContentTypeId = item.ContentTypeId.ToString();
this.Modified = (DateTime)item["Modified"];
}
public virtual void MapTo(object listItem)
{
SPListItem item = (SPListItem)listItem;
item["Modified"] = this.Modified == DateTime.MinValue ? this.Modified = DateTime.Now : this.Modified;
}
public virtual void Resolve(RefreshMode mode, object originalListItem, object databaseObject)
{
SPListItem originalItem = (SPListItem)originalListItem;
SPListItem databaseItem = (SPListItem)databaseObject;
DateTime originalModifiedValue = (DateTime)originalItem["Modified"];
DateTime dbModifiedValue = (DateTime)databaseItem["Modified"];
string originalContentTypeIdValue = originalItem.ContentTypeId.ToString();
string dbContentTypeIdValue = databaseItem.ContentTypeId.ToString();
switch(mode)
{
case RefreshMode.OverwriteCurrentValues:
this.Modified = dbModifiedValue;
this.ContentTypeId = dbContentTypeIdValue;
break;
case RefreshMode.KeepCurrentValues:
databaseItem["Modified"] = this.Modified;
break;
case RefreshMode.KeepChanges:
if (this.Modified != originalModifiedValue)
{
databaseItem["Modified"] = this.Modified;
}
else if (this.Modified == originalModifiedValue && this.Modified != dbModifiedValue)
{
this.Modified = dbModifiedValue;
}
if (this.ContentTypeId != originalContentTypeIdValue)
{
throw new InvalidOperationException("You cannot change the ContentTypeId directly");
}
else if (this.ContentTypeId == originalContentTypeIdValue && this.ContentTypeId != dbContentTypeIdValue)
{
this.ContentTypeId = dbContentTypeIdValue;
}
break;
}
}
}
Once you have the ContentType and the underlying SPListItem available on your L2SP entity it is simply a matter of writing a method which returns an instance of the derived ContentType entity from a combination of the values of the base type and the extra data for the missing fields from the SPListItem.
UPDATE: I don't actually have an example converter class as we don't use the above mapping extension to Item in this way. However I could imagine something like this would work:
public static class EntityConverter
{
public static Approval ToApproval(WorkflowTask wft)
{
Approval a = new Approval();
a.SomePropertyOnWorkflowTask = wft.SomePropertyOnWorkflowTask;
a.SomePropertyOnApproval = wft.SPListItem["field-name"];
return a;
}
}
Or you could put a method on a partial instance of WorkflowTask to return an Approval object.
public partial class WorkflowTask
{
public Approval ToApproval()
{
Approval a = new Approval();
a.SomePropertyOnWorkflowTask = this.SomePropertyOnWorkflowTask;
a.SomePropertyOnApproval = this.SPListItem["field-name"];
return a;
}
public LegalReview ToLegalReview()
{
// Create and return LegalReview as for Approval
}
}
In either situation you would need to determine the method to call to get the derived type from the ContentTypeId property of the WorkflowTask. This is the sort of code I would normally want to generate in one form or another as it will be pretty repetitive but that is a bit off-topic.