I have a user follow/unfollow page that searches Firebase for a list of followers and returns a Boolean if their usedID is found...
Future<Null> _friends() async {
fb.child("users/${userid}/Following/${id}").onValue.listen((Event event) {
setState((){
if (event.snapshot.value != null) {
friends == true;
} else if (event.snapshot.value == null) {
friends == false;
}
});
});
}
The bool is then set in a separate function that changes a public bool...
bool friends;
The trouble is that my Widget/Scaffold doesn't update here...
friends == true ? new RaisedButton(onPressed: unfollow()) :
new RaisedButton(onPressed: follow());
Any ideas? I'll update with exact code once later.
the issue is that you've used an == (equality) comparison operator instead of = (assignment). Change your code to the following:
Future<Null> _friends() async {
fb.child("users/${userid}/Following/${id}").onValue.listen((Event event) {
setState((){
// this will return true or false which is what you want based on your code :)
friends = event.snapshot.value == null;
});
});
}
Related
I have method when icon on pressed ,
onPressed: () {
check(snapshot.data[index]);
},
and method to check if the data found on another list ,I did as below :
void add_cart(item){
for (var x in list){
if (x.id==item.id){
cartCount = 1;
}
else {
cartCount = 0;
}
}
if (cartCount == 1){
list.remove(item);
}
else{
list.add(item);
}
print(cartCount);
notifyListeners();
}
the cartcount work correct but remove method don't work , what is the true way for that ?
you need to override == and hashcode of your cart model like this
class CartModel {
String id;
// other properties
#override
bool operator ==(Object other) => other is CartModel && runtimeType == other.runtimeType && id == other.id;
#override
int get hashCode => id.hashCode;
}
after that list.remove(item); will work as intended
I have component with a couple of properties, using a promise in the willRender hook to try and create a (pagination) object:
export default Ember.Component.extend({
pagination:null,
testing:null, // to check if this.set is ok within the promise!
willRender() {
let page = {};
let model = this.get('data');
model.get('products').then(relatedItems => {
let maxRecords = relatedItems.get('length');
relatedItems.forEach(function(item,index) {
if (item.get('slug') === itemModel.get('id')) {
if (index === 0) {
page.Prev = null;
page.Next = relatedItems.objectAt(index+1).get('slug');
}
else if (index+1 === maxRecords) {
page.Prev = relatedItems.objectAt(index-1).get('slug');
page.Next = null;
}
else {
page.Prev = relatedItems.objectAt(index-1).get('slug');
page.Next = relatedItems.objectAt(index+1).get('slug');
}
}
});
this.set('testing','hello world');
console.log(this.get('testing')); // hello world
this.set('pagination',page);
console.log(this.get('pagination')); // Object {Prev: "product-1", Next: "product-2"}
},reject => {
console.log('error '+reject);
});
}
})
In my template
{{testing}} // prints hello world
However, if I try and access {{pagination}} eg {{log pagination}}, the browser crashes with a loop printing out the object to the console.
I don't know where I'm going wrong here - any help much appreciated!
It's likely you are triggering the template to rerender causing willRender to fire over and over which causes an infinite loop in your code.
willRender is a non-standard place to do this code, init would be more standard since it only fires on initialization of the component. Even better would be to use
myInit: Ember.on('init', function(){
....
})`
instead of overriding willRender on the object.
try to check whether Object is present at specific position. i think its going undefined during iteration of for loop. try to ensure that ObjectAt is not returning undefined or null value during running of for loop.
relatedItems.forEach(function(item,index) {
if (item.get('slug') === itemModel.get('id')) {
if (index === 0) {
page.Prev = null;
if(relatedItems.objectAt(index+1) ! = undefined) {
page.Next = relatedItems.objectAt(index+1).get('slug');
}else{
page.Next == null;
}
}
else if (index+1 === maxRecords) {
if(relatedItems.objectAt(index-1) ! = undefined) {
page.Prev = relatedItems.objectAt(index-1).get('slug');
}else{
page.Prev = null;
}
page.Next = null;
}
else {
if(relatedItems.objectAt(index-1) ! = undefined) {
page.Prev = relatedItems.objectAt(index-1).get('slug');
}else{
page.Prev = null;
}
if(relatedItems.objectAt(index+1) ! = undefined) {
page.Next = relatedItems.objectAt(index+1).get('slug');
}else{
page.Next = null;
}
}
}
Please ensure that Object at is returning object.
There seems to be a few problems here, would be interested to know what your console errors are.
You don't seem to have defined itemModel so don't know how you're referencing that.
Also you can't access this from within a .then. You need to do something like this to set a component variable.
var _this = this;
promise().then(function(results) {
_this.set('testing', 'hello world');
});
you are not using , after testing:null
there should be , after testing property like that
pagination:null,
testing:null, // i use ',' after testing: null property
try to use your pagination code under init hook rather than willrender hook
init() {
//you code
},
I'm having an issue changing the workflow state for an item programmatically. The state isn't being changed no matter what I do to the field. I've tried using (new SecurityDisabler()){} and putting the item in editing mode then changing the field manually. I've noticed that the item itself has the Lock set to <r />, could this be causing an issue?
Here is some sample code of what I've tried to do:
[HttpPost]
[MultipleButton(Name = "action", Argument = "Submit")]
public ActionResult Submit(LoI model)
{
if (model.Submitted || !model.Signed)
{
return Redirect("/Profile/LoI");
}
ModifyCandidateInfo(model, true);
Session["message"] = Translate.Text("loi-submitted-message");
Session["messageClass"] = "success";
return Redirect("/Profile/LoI");
}
private static void ModifyCandidateInfo(LoI model, bool isSubmission)
{
using (new SecurityDisabler())
{
var candidateFolder = CBUtility.GetCandidateFolder();
var loi= candidateFolder.GetChildren().SingleOrDefault(loi => loi.TemplateID == LoITemplateId);
if (loi == null) return;
loi.Editing.BeginEdit();
EditFields(loi, model);
EditChildren(loi, model);
//Send emails upon submission
if (isSubmission)
{
loi.ExecuteCommand("Submit",
loi.Name + " submitted for " + model.CandidateName);
using (new SecurityDisabler())
{
loi.Editing.BeginEdit();
loi.Fields["__Workflow state"].Value = "{F352B651-341B-4CCF-89FE-BD77F5E4D540}";
loi.Editing.EndEdit();
}
}
loi.Editing.EndEdit();
}
}
I initalized the item's workflow with the following function:
public static void InitializeWorkflow(Item item, ID workflowId)
{
item.Editing.BeginEdit();
var workflow =
item.Database.WorkflowProvider.GetWorkflow(workflowId.ToString());
workflow.Start(item);
item.Editing.EndEdit();
}
The item starts at the default drafting state and executed a "Submit" command that fires off emails. Through the Sitecore UI if I hit submit it'll go to the next workflow state but not programmatically when I fire off the ExecuteCommand function. Below you'll find the ExecuteCommand function.
public static WorkflowResult ExecuteCommand(this Item item, string commandName, string comment)
{
using (new SecurityDisabler())
{
var workflow = item.Database.WorkflowProvider.GetWorkflow(item);
if (workflow == null)
{
return new WorkflowResult(false, "No workflow assigned to item");
}
var command = workflow.GetCommands(item[FieldIDs.WorkflowState])
.FirstOrDefault(c => c.DisplayName == commandName);
return command == null
? new WorkflowResult(false, "Workflow command not found")
: workflow.Execute(command.CommandID, item, comment, false);
}
}
The command fires off fine and the emails are sent but I can't figure out why the state won't change. Could someone provide me with other suggestions or a solution?
Am I reading the workflow state id correctly? I'm using the item ID for the workflow state.
I think your code is really similar to my implementation. This is my code's background.
All items have the same workflow named "WF" and it has three workflow states (Working, Awaiting Approval, and Approved). One page-item having "WF" has some rendering items and those datasource items. Suppose a content editor is ready to submit and approve the item with its related items. By hitting the "Submit" and "Approval" button in the page, all page-item's related items have the same workflow state as the page-item's one.
Most code are from Marek Musielak and this code is perfectly working in my side.
public class UpdateWorkflowState
{
// List all controls in page item
public RenderingReference[] GetListOfSublayouts(string itemId, Item targetItem)
{
RenderingReference[] renderings = null;
if (Sitecore.Data.ID.IsID(itemId))
{
renderings = targetItem.Visualization.GetRenderings(Sitecore.Context.Device, true);
}
return renderings;
}
// Return all datasource defined on one item
public IEnumerable<string> GetDatasourceValue(WorkflowPipelineArgs args, Item targetItem)
{
List<string> uniqueDatasourceValues = new List<string>();
Sitecore.Layouts.RenderingReference[] renderings = GetListOfSublayouts(targetItem.ID.ToString(), targetItem);
LayoutField layoutField = new LayoutField(targetItem.Fields[Sitecore.FieldIDs.FinalLayoutField]);
LayoutDefinition layoutDefinition = LayoutDefinition.Parse(layoutField.Value);
DeviceDefinition deviceDefinition = layoutDefinition.GetDevice(Sitecore.Context.Device.ID.ToString());
foreach (var rendering in renderings)
{
if (!uniqueDatasourceValues.Contains(rendering.Settings.DataSource))
uniqueDatasourceValues.Add(rendering.Settings.DataSource);
}
return uniqueDatasourceValues;
}
// Check workflow state and update state
public WorkflowResult ChangeWorkflowState(Item item, ID workflowStateId)
{
using (new EditContext(item))
{
item[FieldIDs.WorkflowState] = workflowStateId.ToString();
}
Sitecore.Layouts.RenderingReference[] renderings = GetListOfSublayouts(item.ID.ToString(), item);
return new WorkflowResult(true, "OK", workflowStateId);
}
// Verify workflow state and update workflow state
public WorkflowResult ChangeWorkflowState(Item item, string workflowStateName)
{
IWorkflow workflow = item.Database.WorkflowProvider.GetWorkflow(item);
if (workflow == null)
{
return new WorkflowResult(false, "No workflow assigned to item");
}
WorkflowState newState = workflow.GetStates().FirstOrDefault(state => state.DisplayName == workflowStateName);
if (newState == null)
{
return new WorkflowResult(false, "Cannot find workflow state " + workflowStateName);
}
unlockItem(newState, item);
return ChangeWorkflowState(item, ID.Parse(newState.StateID));
}
// Unlock the item when it is on FinalState
public void unlockItem(WorkflowState newState, Item item)
{
if (newState.FinalState && item.Locking.IsLocked())
{
using (new EditContext(item, false, false))
{
item["__lock"] = "<r />";
}
}
}
}
I have a task form (OOB) where user needs to enter comments only when clicks on rejected button.
I wrote following script but this is firing even when clicked on approved button.
$('input[value=Rejected]').click(function() {
PreSaveAction();
});
});
function PreSaveAction()
{
var commentsBox = getFieldControl('ApprovalComments','Text');
var comments=$("textarea[title='ApprovalComments']").val();
if(comments.length==0)
{
var errorHtml='';
errorHtml = '<span class="ms-formvalidation"><span role="alert">Please enter Comments<br></span> </span>';
commentsBox.after(errorHtml);
return false;
}
return false;
}
function getFieldControl(fieldName,fieldType)
{
var control = $('[id^=' + fieldName + '_][id$=' + fieldType + 'Field]');
return control;
}
Thanks in advance
You can actually achieve it easily. Below is the jquery code sample:
function PreSaveAction()
{
var currentPage = decodeURIComponent(window.location.href.replace(/\+/g, " "));
if (currentPage.contains("Lists/WorkflowTasks/EditForm.aspx"))
{
var commentsTextArea=$("textarea[title='ApprovalComments']");
if(commentsTextArea.val().trim()=="")
{
var errorHtml='';
errorHtml = '<span class="ms-formvalidation"><span role="alert">Please enter Comments<br></span></span>';
commentsTextArea.after(errorHtml);
return false;
}
else
{
return true;
}
}else
{
return true;
}
}
String.prototype.contains = function (it) {
return this.indexOf(it) != -1;
};
Explanation:
PreSaveAction method will be triggered in all the New and Edit Forms in SP2010/SP2013.
Hence there is no need of Button onClick methods for client side validation on these forms.
In the above code, when you click of Save/Approved/Rejected buttons in your page, PreSaveAction will be fired.
We will be checking if current page is of Task Forms (WorkflowTasks is the name of the task List , please update this accordingly), else return true.
If the ApprovalComments is empty then error message will be shown and return false.
Else, return true.
Also notice the helper method String.prototype.contains.
Is there a way to always have the selected items in a Sitecore Treelist sorted alphabetically?
No, but you could look in to creating your own 'sorted treelist'. Someone asked a different question earlier today but it has basically the same answer:
Sitecore Tree list datasource - VersionExist
Sitecore lets you create custom field types. They can be based on existing ones, but with some added tweaks.
As mentioned in the answers to the other question, here are 2 articles which are good places to start:
Creating a Composite Custom Field
Apply Dynamic TreeList Source Parameters with the Sitecore ASP.NET CMS
Here's my implementation, which although long, is mostly copy-and-pasted from the decompiled Treelist code. I've highlighted which bits which are new in the Value property and the Add method:
namespace CustomFieldTypes
{
public class Treelist : Sitecore.Shell.Applications.ContentEditor.TreeList
{
public override string Value
{
get
{
// ---------- New code here -----------
var ids = base.Value.Split('|');
var db = Sitecore.Configuration.Factory.GetDatabase("master");
var items = ids.Select(id => db.GetItem(id)).Where(item => item != null);
var orderedItems = items.OrderBy(item => item.Name);
var orderedIds = orderedItems.Select(item => item.ID.ToString());
return String.Join("|", orderedIds);
// ---------------------------------------
}
set
{
base.Value = value;
}
}
protected void Add()
{
if (this.Disabled)
return;
string viewStateString = this.GetViewStateString("ID");
TreeviewEx treeviewEx = this.FindControl(viewStateString + "_all") as TreeviewEx;
Assert.IsNotNull((object) treeviewEx, typeof (DataTreeview));
Listbox listbox = this.FindControl(viewStateString + "_selected") as Listbox;
Assert.IsNotNull((object) listbox, typeof (Listbox));
Item selectionItem = treeviewEx.GetSelectionItem();
if (selectionItem == null)
{
SheerResponse.Alert("Select an item in the Content Tree.", new string[0]);
}
else
{
if (this.HasExcludeTemplateForSelection(selectionItem))
return;
if (this.IsDeniedMultipleSelection(selectionItem, listbox))
{
SheerResponse.Alert("You cannot select the same item twice.", new string[0]);
}
else
{
if (!this.HasIncludeTemplateForSelection(selectionItem))
return;
SheerResponse.Eval("scForm.browser.getControl('" + viewStateString + "_selected').selectedIndex=-1");
ListItem listItem = new ListItem();
listItem.ID = Sitecore.Web.UI.HtmlControls.Control.GetUniqueID("L");
// ----- New Code Here -----------------------
bool listItemAdded = false;
for (int i = 0; i < listbox.Controls.Count; i++ )
{
ListItem control = (ListItem)listbox.Controls[i];
if (control == null)
return;
if (String.Compare(GetHeaderValue(selectionItem), control.Header) < 0)
{
listbox.Controls.AddAt(i, listItem);
listItemAdded = true;
break;
}
}
if (!listItemAdded)
{
Sitecore.Context.ClientPage.AddControl((System.Web.UI.Control)listbox, (System.Web.UI.Control)listItem);
}
// ------------------------------------------
listItem.Header = this.GetHeaderValue(selectionItem);
listItem.Value = listItem.ID + (object) "|" + (string) (object) selectionItem.ID.ToString();
SheerResponse.Refresh((Sitecore.Web.UI.HtmlControls.Control) listbox);
SetModified();
}
}
}
protected static void SetModified()
{
Sitecore.Context.ClientPage.Modified = true;
}
private bool HasIncludeTemplateForSelection(Item item)
{
Assert.ArgumentNotNull((object)item, "item");
if (this.IncludeTemplatesForSelection.Length == 0)
return true;
else
return HasItemTemplate(item, this.IncludeTemplatesForSelection);
}
private bool HasExcludeTemplateForSelection(Item item)
{
if (item == null)
return true;
else
return HasItemTemplate(item, this.ExcludeTemplatesForSelection);
}
private bool IsDeniedMultipleSelection(Item item, Listbox listbox)
{
Assert.ArgumentNotNull((object)listbox, "listbox");
if (item == null)
return true;
if (this.AllowMultipleSelection)
return false;
foreach (Sitecore.Web.UI.HtmlControls.Control control in listbox.Controls)
{
string[] strArray = control.Value.Split(new char[1]
{
'|'
});
if (strArray.Length >= 2 && strArray[1] == item.ID.ToString())
return true;
}
return false;
}
private static bool HasItemTemplate(Item item, string templateList)
{
Assert.ArgumentNotNull((object)templateList, "templateList");
if (item == null || templateList.Length == 0)
return false;
string[] strArray = templateList.Split(new char[1]
{
','
});
ArrayList arrayList = new ArrayList(strArray.Length);
for (int index = 0; index < strArray.Length; ++index)
arrayList.Add((object)strArray[index].Trim().ToLowerInvariant());
return arrayList.Contains((object)item.TemplateName.Trim().ToLowerInvariant());
}
}
}
When this is compiled and in your application you need to go to /sitecore/system/Field types/List Types/Treelist in the core database. In there, you need to fill in the Assembly and Class fields, and clear out the Control fields.
You could create a custom field and sort the items in the selected list using generics, then save the guids back to the field. I covered this in a recent blog post. There isn't that much coding involved.