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• Rails AR validates_uniqueness_of against polymorphic relationship

  - by aaronrussell

  Is it posible to validate the uniqueness of a child model's attribute scoped against a polymorphic relationship? For example I have a model called field that belongs to fieldable: class Field < ActiveRecord::Base belongs_to :fieldable, :polymorphic => :true validates_uniqueness_of :name, :scope => :fieldable_id end I have several other models (Pages, Items) which have many Fields. So what I want is to validate the uniqueness of the field name against the parent model, but the problem is that occasionally a Page and an Item share the same ID number, causing the validations to fail when they shouldn't. Am I just doing this wrong or is there a better way to do this?

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• Addressing a memory leak stops my UI from showing iphone

  - by dubbeat

  Hi I've being getting a memory leak warning with a UITabbarcontroller. If I release the tabbarcontroller the warning goes away but the tabbar will not show any content. If I debug the app with the warning still in it the app runs but will crash after a couple of minutes UITabBarController *tabBarController = [[UITabBarController alloc] init]; tabBarController.view.frame = CGRectMake(0, 0, 320, 460); tabBarController.viewControllers=localControllersArray; // Clean up objects we don't need anymore [promoTabOptionHome release]; [promoTabOptionInfo release]; [promoTabOptionEvents release]; [promoTabOptionBuy release]; [localControllersArray release]; // Finally, add the tab controller view to the parent view [self.view addSubview:tabBarController.view]; //[tabBarController release]; commenting out this line removes the warning but results in no content being shown

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• A simple factory_girl question

  - by gmile

  I have two factories (post_factory.rb, comment_factory.rb) in separate files. I'd like to create a bit complex factory, which will create a post with associated comments for me. I created a third file, called complex_factory.rb, and wrote the following code: Factory.define :post_with_comments, :parent => :post do |post| post.after_create { |p| Factory(:user_last_state, :post => p) } end But rake spec raises an error, stating that the file is unaware of post and comment factories. At the very next moment, I naïvely wrote requires at the top: require "post_factory.rb" require "comment_factory.rb" But that didn't gave any proper result. Maybe this requires actually looking the wrong direction? Or they pretty much don't matter (as registering factories for visibility might be more complex that I assume). Am I missing something? Any ideas?

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• django admin how to limit selectbox values

  - by SledgehammerPL

  model: class Store(models.Model): name = models.CharField(max_length = 20) class Admin: pass def __unicode__(self): return self.name class Stock(Store): products = models.ManyToManyField(Product) class Admin: pass def __unicode__(self): return self.name class Product(models.Model): name = models.CharField(max_length = 128, unique = True) parent = models.ForeignKey('self', null = True, blank = True, related_name='children') (...) def __unicode__(self): return self.name mptt.register(Product, order_insertion_by = ['name']) admin.py: from bar.drinkstore.models import Store, Stock from django.contrib import admin admin.site.register(Store) admin.site.register(Stock) Now when I look at admin site I can select any product from the list. But I'd like to have a limited choice - only leaves. In mptt class there's function: is_leaf_node() -- returns True if the model instance is a leaf node (it has no children), False otherwise. But I have no idea how to connect it I'm trying to make a subclass: in admin.py: from bar.drinkstore.models import Store, Stock from django.contrib import admin admin.site.register(Store) class StockAdmin(admin.ModelAdmin): def queryset(self, request): qs = super(StockAdmin, self).queryset(request).filter(ihavenoideawhatfilter) admin.site.register(Stock, StockAdmin) but I'm not sure if it's right way, and what filter set.

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• Force VSProps settings to override project settings

  - by Steve

  I have a vsprops file that defines the optimizations all of our projects should be built with for Visual Studio 2008. If I set the properties for the project to "inherit from parent of project defaults" it works, and fills them in the vcproj file. However, this doesn't protect me from a developer checking in a project file that changes the optimizations. In this case, the project settings are used over the vsprops settings. I need to make it so that vsprops always takes precedence over what is in the vcproj file. Is this possible? Other workarounds are also welcome.

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• flex: move item around in a tree control

  - by Markus

  Hi everybody, I have a tree control and I want to give the user the ability that he can move up and down the element he just selected with a up and a downbutton. The tree gets generated from XML. I managed to insert the selected item a second time at a other place, with the following code: var parentXML:XML = XML(containerTree.selectedItem).parent(); var upperItem:XML = topContainer.source[containerTree.selectedIndex-1]; parentXML.insertChildBefore(upperItem,XML(containerTree.selectedItem)); but then I have the item there twice in the List. How can I remove to reinsert it? Thanks for Hints! Markus

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• (External) Java library for creating Tree structure ?

  - by suVasH.....

  I am planning to implement a tree structure where every node has two children and a parent along with various other node properties (and I'd want to do this in Java ) Now, the way to it probably is to create the node such that it links to other nodes ( linked list trick ), but I was wondering if there is any good external library to handle all this low level stuff. ( for eg. the ease of stl::vector vs array in C++ ). I've heard of JDots, but still since i haven't started (and haven't programmed a lot in Java), I'd rather hear out before I begin.

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• Automatically Loading XIB for UITableViewController

  - by ACBurk

  Ran into something interesting, want to know if I'm doing something wrong or if this is the correct behavior. I have a custom UITableViewController. I ASSUMED (first mistake) that if you initialize as such: [[CustomTableController alloc] init]; it would automatically load from a XIB of the same name, CustomTableController.xib, if it is in the same directory and such. HOWEVER This does not work; doesn't load the XIB. BUT, if I change the parent class of my controller from 'UITableViewController' to 'UIViewController', EVERYHTING WORKS FINE! Calling: [[CustomTableController alloc] init]; loads the controller and view from my xib. Am I doing something wrong? Is this a bug? Expected behavior?

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• Routing Business Branches: Granular access control in ASP.NET MVC

  - by FreshCode

  How should ASP.NET MVC routes be structured to allow granular role-based access control to business branches? Every business entity is related to a branch, either by itself or via its parent entities. Is there an elegant way to authorize actions based on user-roles for any number of branches? 1. {branch} in route? {branch}/{controller}/{action}/{id} Action: [Authorize(Roles="Technician")] public ActionResult BusinessWidgetAction(BusinessObject obj) { // Authorize will test if User has Technician role in branch context // ... } 2. Retrieve branch from business entity? {controller}/{action}/{id} Action: public ActionResult BusinessWidgetAction(BusinessObject obj) { if (!User.HasAccessTo("WidgetAction", obj.Branch)) throw new HttpException(403, "No soup for you!"); // or redirect // ... } 3. Or is there a better way?

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• Jquery, get div width when overflow: hidden;

  - by Fabio

  Hello all. How can I get a div width when the div is inside another div with "overflow: hidden;" ? I tried to set overflow as auto and after using $("#divselector").width() but I always get the parent div width! Ex: html: <div id="content"> <div id="item">content content content ...</div> </div> css: #content { width: 760px; height: 100%; overflow: hidden; display: block; position: relative; cursor: move; }

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• Rails 3.1. Cocoon link_to_add_association example needed

  - by BazZy

  pls show any example of using Cocoon's 'link_to_add_association' with html_options. https://github.com/nathanvda/cocoon Documentation says: html_options: extra html-options (see link_to) There are two extra options that allow to conrol the placement of the new link-data: data-association-insertion-node : the jquery selector of the node data-association-insertion-position : insert the new data before or after the given node. But i can not understand what to do, if i want insert partial just before my "add element" link. Not just after parent's div begin. This not gonna work: <%= link_to_add_association "add element", f, :production_years, :position = "after_all" %

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• Jquery draggable persistence either through mysql or saving cookie in the database?

  - by Muhammad Jehanzaib

  I want to know that how can I persist the divs dropped on a draggable. I have been trying since long but stuck at this point. Actually you can see the demo here. I have to save the user designed wedding floor. So whenever user logins next time he/ she is able to see the last design saved. The code is shown below: $(document).ready(function() { $("#droppable").droppable({ accept: '.draggable', drop: function(event, ui) { $(this).append($(ui.draggable).clone()); $("#droppable .draggable").addClass("objects"); $(".objects").removeClass("ui-draggable draggable"); $(".objects").draggable({ containment: 'parent', }); } }); $(".draggable").draggable({ helper: 'clone', tolerance: 'touch', cursor:'move' }); });

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• javascript window.open lost session on closing popup window

  - by user341799

  Hi I'm using window.open function to popup the window as I close it, the link in parent window are not working here is my code `var rcount =0; var radio_val = document.form1.ac_voucher_type_id.length; for (counter = 0; counter < radio_val; counter++){ if (document.form1.ac_voucher_type_id[counter].checked){ radio_choice = document.form1.ac_voucher_type_id[counter].value; //alert(document.form1.ac_voucher_type_id[counter].value); url1 = '?compid=&date='+document.getElementById('datepicker2').value+'&vouchertype='+radio_choice+'&voucherid='; url= typ+"entry.php"+url1; window.open(url,'',"width=500,height=500,scrollbars=yes"); }else{ rcount++; } } // alert(rcount); if(rcount==radio_val){ alert("Please select voucher type"); }` Please suggest the solution for this

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• Make page to tell browser not to cache/preserve input values

  - by queen3

  Most browser cache form input values. So when user refreshes page, the inputs have same values. Here's my problem. When user clicks Save, server validates POSTed data (e.g. checked products), and if not valid, sends it back to browser. However, as stated above, even if server clears selection for some values, they may still be selected because of browser cache! My data has invisible (until parent item selected) checkboxes, so user may be even not aware that some previous value is still selected, until clicks Save again and gets error message - even though user thinks it's not. Which is irritating. This can be resolved by doing Ctrl-F5, but it's not even a solution.Is there automatic/programmatic way to tell browser not to cache form input data on some form/page?

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• Where to start when programming process synchronization algorithms like clone/fork, semaphores

  - by David

  I am writing a program that simulates process synchronization. I am trying to implement the fork and semaphore techniques in C++, but am having trouble starting off. Do I just create a process and send it to fork from the very beginning? Is the program just going to be one infinite loop that goes back and forth between parent/child processes? And how do you create the idea of 'shared memory' in C++, explicit memory address or just some global variable? I just need to get the overall structure/idea of the flow of the program. Any references would be appreciated.

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• Parameter to swf loader with loader class

  - by alejandrobog

  Hi im loading a child swf into my parent swf and I want to pass some parameters to the child swf. Any idea on how to do this. Here is my code: var req:URLRequest = new URLRequest( "test.swf" ); var loader:Loader = new Loader(); loader.contentLoaderInfo.addEventListener( Event.COMPLETE, loadComplete ); loader.load(req); function loadComplete(e:Event){ var childSwf:DisplayObject = e.target.content as DisplayObject; //Im guessing here I need to set the parameter VideoContainer.addChild(childSwf); }

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• How to simulate postback in nested usercontrols?

  - by jaloplo

  Hi all, I'm doing an asp.net application with one page. In this page, I have one usercontrol defined. This usercontrol has a menu (three buttons) and 3 usercontrols defined too. Depending on the clicked button one of the three usercontrols turn to visible true or false. In these three usercontrols I have a button and a message, and I want to show the message "It's NOT postback" when the button of the menu is clicked, and when the button of the usercontrol is clicked the message will be "YES, it's postback!!!". The question is that using property "IsPostBack" of the usercontrol or the page the message will never be "It's NOT postback" because of the clicked button of the menu to show the nested usercontrol. This is the structure of the page: page parent usercontrol menu nested usercontrol 1 message button nested usercontrol 2 nested usercontrol 3 I know it can be done using ViewState but, there is a way to simulate IsPostBack property or know when is the true usercontrol postback? Thanks.

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• CodeIgniter - How to hide index.php from the URL

  - by kapil.israni

  This is what my .htaccess looks like. The .htaccess is sitting in /www/scripts directory which is the parent of codeigniter's "system" directory and which also contains index.php. I have enabled mod_rewrite in my Apache 2.2.x. This is on Ubuntu 9.10 server. I followed this link, but it does not work. Is there anything i need to do in apache2, any specific configuration so that this works?? RewriteEngine on RewriteBase / RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.*)$ index.php/$1 [QSA,L]

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• How do these user/userParam references relate to the Customer and Account lookups?

  - by marmalade

  In the following code example how do the user/userParam references relate to the Customer and Account lookups and what is the relationship between Customer and Account? // PersistenceManager pm = ...; Transaction tx = pm.currentTransaction(); User user = userService.currentUser(); List<Account> accounts = new ArrayList<Account>(); try { tx.begin(); Query query = pm.newQuery("select from Customer " + "where user == userParam " + "parameters User userParam"); List<Customer> customers = (List<Customer>) query.execute(user); query = pm.newQuery("select from Account " + "where parent-pk == keyParam " + "parameters Key keyParam"); for (Customer customer : customers) { accounts.addAll((List<Account>) query.execute(customer.key)); } } finally { if (tx.isActive()) { tx.rollback(); } }

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• How do these user/userParam references relate to the Customer and Account lookups?

  - by plath

  In the following code example how do the user/userParam references relate to the Customer and Account lookups and what is the relationship between Customer and Account? // PersistenceManager pm = ...; Transaction tx = pm.currentTransaction(); User user = userService.currentUser(); List<Account> accounts = new ArrayList<Account>(); try { tx.begin(); Query query = pm.newQuery("select from Customer " + "where user == userParam " + "parameters User userParam"); List<Customer> customers = (List<Customer>) query.execute(user); query = pm.newQuery("select from Account " + "where parent-pk == keyParam " + "parameters Key keyParam"); for (Customer customer : customers) { accounts.addAll((List<Account>) query.execute(customer.key)); } } finally { if (tx.isActive()) { tx.rollback(); } }

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• Allow native DLL to output stdout / stderr in c# console application

  - by xaw

  I have a native DLL which outputs via stdout / stderr. I have a C# console application which calls this DLL and outputs binary data to a parent C# application which started the C# console exe, processing stdout / stderr. Currently when I call the C# exe it works just fine (the DLL hooks up to the stdout of my console application and puts its data in just fine). Is this by design (and shouldn't be broken in future .NET framework versions)? Are there limitations on my managed code's deployment with this strategy (full-trust, permission requirements, GAC issues, etc)? I can't seem to find any documentation about stdout with a managed exe and an unmanaged dll both putting data in that standard output on MSDN. Thanks,

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• Qt drag & drop button; drop not detecting

  - by Thomas Verbeke

  I'm creating a 2D game in QT and i'm trying to implement a drag & drop into my program. For some reason the drop is not registered: qDebug should print a message on dropping but this doesn't happen. #include "dialog.h" #include "ui_dialog.h" #include "world.h" #include <vector> Dialog::Dialog(QWidget *parent) : QDialog(parent), ui(new Ui::Dialog) { ui->setupUi(this); scene = new QGraphicsScene(this); ui->graphicsView->setScene(scene); MySquare *item; QGraphicsRectItem *enemyItem; World *myWorld = new World(); std::vector<Tile*> tiles = myWorld->createWorld(":/texture.jpg"); int count = 0; foreach (Tile *tile, tiles){ count++; item = new MySquare(tile->getXPos()*4,tile->getYPos()*4,4,4); item->setBrush(QColor(tile->getValue()*255,tile->getValue()*255,tile->getValue()*255)); item->setAcceptDrops(true); scene->addItem(item); } player = new MySquare(10,20,10,10); player->setAcceptDrops(true); scene->addItem(player); //drag & drop part QPushButton *pushButton = new QPushButton("Click Me",this); connect(pushButton,SIGNAL(pressed()),this,SLOT(makeDrag())); setAcceptDrops(true); } void Dialog::makeDrag() { QDrag *dr = new QDrag(this); // The data to be transferred by the drag and drop operation is contained in a QMimeData object QMimeData *data = new QMimeData; data->setText("This is a test"); // Assign ownership of the QMimeData object to the QDrag object. dr->setMimeData(data); // Start the drag and drop operation dr->start(); } mysquare.cpp #include "mysquare.h" MySquare::MySquare(int _x,int _y, int _w, int _h) { isPlayer=false; Pressed=false; setFlag(ItemIsMovable); setFlag(ItemIsFocusable); setAcceptDrops(true); color=Qt::red; color_pressed = Qt::green; x = _x; y = _y; w = _w; h = _h; } QRectF MySquare::boundingRect() const { return QRectF(x,y,w,h); } void MySquare::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) { QRectF rec = boundingRect(); QBrush brush(color); if (Pressed){ brush.setColor(color); } else { brush.setColor(color_pressed); } painter->fillRect(rec,brush); painter->drawRect(rec); } void MySquare::mousePressEvent(QGraphicsSceneMouseEvent *event) { Pressed=true; update(); QGraphicsItem::mousePressEvent(event); qDebug() << "mouse Pressed"; } void MySquare::mouseReleaseEvent(QGraphicsSceneMouseEvent *event) { Pressed=false; update(); QGraphicsItem::mousePressEvent(event); qDebug() << "mouse Released"; } void MySquare::keyPressEvent(QKeyEvent *event){ int x = pos().x(); int y = pos().y(); //key handling QGraphicsItem::keyPressEvent(event); } void MySquare::dropEvent(QDropEvent *event) { qDebug("dropEvent - square"); // Unpack dropped data and handle it the way you want qDebug("Contents: %s", event->mimeData()->text().toLatin1().data()); } void MySquare::dragMoveEvent(QDragMoveEvent *event){ qDebug("dragMoveEvent - square "); event->accept(); } void MySquare::dragEnterEvent(QDragEnterEvent *event){ event->setAccepted(true); qDebug("dragEnterEvent - square"); event->acceptProposedAction(); } void MySquare::setBrush(QColor _color){ color = _color; color_pressed = _color; update(); //repaint } edit; there is no problem with qDebug() i'm just using it to test them i'm inside the drag events..which i'm not

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• Redirecting Page(php) using Jquery Timer

  - by rag

  i have tried this code to redirect a php page.but it s not working .can any body please tell me the solution(is there any changes needed in the body part of parent page?).... / / here am pasting the code(header part) / <script type="text/javascript" src="jquery/jquery-latest.pack.js"></script> <script type="text/javascript" src="jquery/jquery.timer.js"></script> <script type="text/javascript"> $(document).ready(function() { // This will hold our timer var myTimer = {}; // delay 3 seconds myTimer = $.timer(3000, function() { //redirect to home page window.location = "http://sys3/shinshiva9/shin_shiva/booking_table.php"; }); }); </script>

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• How to check if a variable is defined in a Master file in ASP.NET MVC

  - by Mortanis

  I've got a Site.Master file I've created to be my template for the majority of the site, with a navigation. This navigation is dynamically created, based on a recursive Entity (called Page) - Pages with a parentID of 0 are top level, and naturally each child carries it's parent's Id in that field. I've created a quick little HTML Helper that accepts the ID of an Page and generates the nav by doing a foreach on the children that have a parentId matching the passed Id. On the majority of the site, I want the Site.Master to use a parentId of 0, but if I'm on a strongly typed View displaying a Page, I naturally want to use the Id of the page. Is there a way to do such conditional logic in a Site.Master (and, does that violate MVC rules)? "If I'm on a strongly typed Page of /Page/{Id}, use the Id render nav, else use 0"

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• Fatal error: Call to a member function item() on a non-object

  - by Andree

  Hi there! I have a weird problem. I have a PHP class with the following method: public function __construct() { parent::__construct(); $this->CI =& get_instance(); $this->log(method_exists($this->CI->config, 'item')); // Outputs TRUE $firephp_enabled = $this->CI->config->item('firephp_enabled'); // Error point $this->setEnabled($firephp_enabled); } $this->CI->config has a method item, and it has been verified using method_exists(). But when I call $this->CI->config->item(), I got the following error: Fatal error: Call to a member function item() on a non-object Can anyone tell me what might be the problem here? Thanks, Andree.

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