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  • Show a django relationship in a template

    - by kevin_82
    I have a django model as follows: class Person(models.Model): name = models.CharField(max_length=255) class Relationship(models.Model): parent = models.ForeignKey(Person) child = models.ForeignKey(Person) description = models.TextField(blank=True) In my view, I pass a certain person, and the relationships in which he/she is parent: person = Person.objects.filter(name ='some name') descendant_relationships = Relationship.objects.filter(parent = person) An I want to show this person's descendants in a list in a template: <ul> {% for item in descendant_relationships%} <li> {{item.child.name}} - {{item.description}} </li> {% endfor %} </ul> But this template code will not show the children of children (i.e. grandchildren, great-grandchildren etc.). How can I get these lower level descendants to show up? I imagine recursion is necessary somewhere, but where?

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  • c# 4.0 - best way to refactor a block of "If (something is Type) {}" statements?

    - by Andrew Johns
    I've got some code that looks like this, public void ResetControls(Control controlOnPage) { if (controlOnPage is TextBox) { ResetTextBoxControl(controlOnPage); } if (controlOnPage is MediaPicker) { ((MediaPicker)controlOnPage).Media = null; } if (controlOnPage is RelatedContentPicker) { ((RelatedContentPicker)controlOnPage).RelatedContentCollection = null; } ... ... foreach (Control child in controlOnPage.Controls) { ResetControls(child); } } The idea behind it is that I can pass a page to the method and it'll recursively reset all the controls on it to their default states - in the case of MediaPicker and RelatedContentPicker, these are user controls that I've created. FXCop warns me "Do Not Cast Unnecessarily" for this code - but I'm unsure how to rewrite it to make it better. Any ideas?

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  • FLEX: why the event is only listened by the dispatcher component ?

    - by Patrick
    hi, I've a parent (Canvas) with many children (LinkButtons) The linkButtons trigger an event to communicate between them: dispatchEvent(new SameBookmarkEvent("SameBookmarkEvent", bookmark.name)); and all linkButtons have a listener this.addEventListener("SameBookmarkEvent", highlightMe); ... private function highlightMe(e:SameBookmarkEvent):void { //do something } Now, the issue is that the event is only listened by the dispatcher child. In other words, only the child triggering the event, is receiving it. I was wondering what's wrong with it, and if I should add a listener to the parent (Canvas)... I basically need the children (LinkButton) communicate between them

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  • Dragging on Different Levels

    - by Fahim Akhter
    Hi, I have a flash project with three non overlapping panels (visual spaces) each of which contains different movie-clips. Each movie-clip in a particular panel is the child of that panel. Now, I want to drag one of the movie-clips from one panel to another (remove it as a child from the first panel and add it to the other) without a jitter and proper drag. What is the appropriate way to handle the drag architecturally. Should the drag be handled in all panels parent. In the panels, or the items themselves? Thanks.

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  • How to update content of one ArrayController from the selected value of another ArrayController in Ember.js

    - by CodeHugger
    I have the following problem in ember.js. A child controller depends on a selected value in a parent controller in order to determine its content. In the database a child has a parent_id reference. App.parentsController = Em.ArrayController.create({ content: [], selected: null }); App.sonsController = Em.ArrayController.create({ // the value of content depends on the id of // the selected item in the parentsController content: [], selected: null }); App.daughtersController = Em.ArrayController.create({ // the value of content depends on the id of // the selected item in the parentsController content: [], selected: null }); I would prefer to solve this without the parentsController having to know anything about the other controllers. This should be possible with observers, bindings or even through calculations but I have no clue where to start. Any help would be well appreciated.

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  • Navigating between 2 ViewControllers

    - by Kobe.o4
    Im using Navigation Controller for my ViewControllers,I set my importantViewController as something like this to be its RootView: UINavigationController *navControl = [[UINavigationController alloc] initWithRootViewController: vc]; [self presentModalViewController: navControl animated: YES]; Then, I pushView anotherView the FrontViewController like this: [self.navigationController pushViewController:vc animated:YES]; After a button is pressed in FrontViewController another view will be pushed ViewA but it is connected with another ViewController ViewB the same way as this AGAIN: [self.navigationController pushViewController:vc animated:YES]; (Which I think Im doing wrong when dismissing either of them with [self.navigationController popViewControllerAnimated:YES];) This is an illustration: My problem is, I need to navigate between View A and View B then when I dismiss either of them it will got back to FrontViewController. Like a child of a child View. Thanks.

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  • Are browsers permitted to render <li>s in any order?

    - by ctford
    As I understand the XML spec, the significance of the order of child elements is not guaranteed. XML parsers tend to keep child elements in the same order as they occur in the XML document, but they are under no obligation to do so. If that's so, then are browsers free to render the <li>s in an <ol> or an <ul> in a different order than they occur in the XHTML? Or is it specified in the XHTML spec somewhere that order has to be preserved? I realise that all major browsers will respect the order of my <li>s. I'm just interested in the academic question of whether or not they are technically obliged to.

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  • Drupal removing javascript from Full HTML link

    - by Jen
    I am new to Drupal and am trying to create a node (let's call it child) that will only really be accessed when clicked on from another node (we'll call it parent). When closing the child window, I want to parent window to refresh. Outside of Drupal, that's easy: <a onclick="window.close(); window.opener.location.reload();" href="#">Click to close this window</a> However, when I type this into the body of a node using Full HTML, it still strips the onclick text from my post. How can I include javascript in the body of a node like this? Is there a special module I need. Thanks!

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  • How do I fix this warning in my mx:request tag?

    - by invertedSpear
    I'm running an HTTPService with the following request: <mx:request xmlns=""> <view>{myViewStack.selectedChild.name}</view> </mx:request> The idea being to pass which child is selected on the viewstack to the php page, and then get that back so I can run some logic based on which child of the viewstack was selected at the time. Everything seems to work, but I get the following warning: Data binding will not be able to detect assignments to "name". This doesn't seem to be causing any trouble, but I know warnings usually mean that I am not following the best practice. How can I fix this? I don't really need this item to be bound, because the name will never change at runtime, but I don't know how else to include it in the request.

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  • UIButton does not respond to touch events after changing its position using setFrame

    - by Pranathi
    I have a view controller class (child) which extends from view controller class (parent). In the parent class's loadView() method I create a sub-view (named myButtonView) with two buttons (buttons are horizontally laid out in the subview) and add it to the main view. In the subclass I need to shift these two buttons up by 50pixels. So, I am shifting the buttonView by calling the setFrame method. This makes the buttons shift and render properly but they do not respond to touch events after this. Buttons work properly in the views of Parent class type. In the child class type view also, if I comment out the setFrame() call the buttons work properly. How can I shift the buttons and still make them respond to touch events? Any help is appreciated. Following is snippets of the code. In the parent class: - (void)loadView { // Some code... CGRect buttonFrameRect = CGRectMake(0,yOffset+1,screenRect.size.width,KButtonViewHeight); myButtonView = [[UIView alloc]initWithFrame:buttonFrameRect]; myButtonView.backgroundColor = [UIColor clearColor]; [self.view addSubview:myButtonView]; // some code... CGRect nxtButtonRect = CGRectMake(screenRect.size.width - 110, 5, 100, 40); myNxtButton = [UIButton buttonWithType:UIButtonTypeCustom]; [myNxtButton setTitle:@"Submit" forState:UIControlStateNormal]; myNxtButton.frame = nxtButtonRect; myNxtButton.backgroundColor = [UIColor clearColor]; [myNxtButton addTarget:self action:@selector(nextButtonPressed:) forControlEvents:UIControlEventTouchUpInside]; [myButtonView addSubview:myNxtButton]; CGRect backButtonRect = CGRectMake(10, 5, 100, 40); myBackButton = [UIButton buttonWithType:UIButtonTypeCustom]; [myBackButton setTitle:@"Back" forState:UIControlStateNormal]; myBackButton.frame = backButtonRect; myBackButton.backgroundColor = [UIColor clearColor]; [myBackButton addTarget:self action:@selector(backButtonPressed:) forControlEvents:UIControlEventTouchUpInside]; [myButtonView addSubview:myBackButton]; // Some code... } In the child class: - (void)loadView { [super loadView]; //Some code .. CGRect buttonViewRect = myButtonView.frame; buttonViewRect.origin.y = yOffset; // This is basically original yOffset + 50 [myButtonView setFrame:buttonViewRect]; yOffset += KButtonViewHeight; // Add some other view below myButtonView .. }

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  • C++ inheritance question

    - by user233973
    Hi guys, I have a C++ inheritance related question. I have a set of classes like this (I have not given the complete class structure coz I am lazy :) ). I want to access chiComponent class public methods using com pointer. How should I go about it? Note that I am having to change the object which "com" is pointing to in a lot of places. So I do not think I can have another chiComponent *ccom = <some_cast> com; ccom.chiComponentMethod() How should I go about it? class Component{ }; class chiComponent : public Component { public: void chiComponentMethod() { cout << "Hi! Chi component function called!!"; } } class parent { protected: Component *com; }; class child : public parent{ public: child() { com = new chiComponent(); } } Regards Arun

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  • So where is this calling super?

    - by dontWatchMyProfile
    From the Core Data docs: Inheritance If you have two subclasses of NSManagedObject where the parent class implements a dynamic property and its subclass (the grandchild of NSManagedObject) overrides the methods for the property, those overrides cannot call super. @interface Parent : NSManagedObject @property(nonatomic, retain) NSString* parentString; @end @implementation Parent @dynamic parentString; @end @interface Child : Parent @end @implementation Child - (NSString *)parentString { // this throws a "selector not found" exception return parentString.foo; } @end very, very funny, because: I see nobody calling super. Or are they? Wait... parentString.foo results in ... a crash ??? it's a string. How can that thing have a .foo suffixed to it? Just another documentation bug?

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  • Using Java, can I have one JVM spawn another, and then have the original one exit?

    - by CarlG
    I have a need to have a running JVM start another JVM and then exit. I'm currently trying to do this via Runtime.getRuntime().exec(). The other JVM starts, but my original JVM won't exit until the "child" JVM process stops. It appears that using Runtime.getRuntime().exec() creates a parent-child relationship between the processes. Is there some way to de-couple the spawned process so that the parent can die, or some other mechanism to spawn a process without any relationship to the creating process? Note that this seems exactly like this question: http://stackoverflow.com/questions/2566502/using-java-to-spawn-a-process-and-keep-it-running-after-parent-quits but the accepted answer there doesn't actually work, at least not on my system (Windows 7, Java 5 and 6). It seems that maybe this is a platform-dependent behavior. I'm looking for a platform independent way to reliably invoke the other process and let my original process die.

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  • Possible to access all Movie clips on a layer, on timeline, through stage ?

    - by azislo
    I have a code ... var selection:Array = new Array(); var diplayObjCont:* = stage; // The rectangle that defines the selection in the containers coordinate space. // Loop throught the containers children. for(var a:int; a<diplayObjCont.numChildren; a++){ // Get the childs bounds in the containers coordinate space. var child:DisplayObject = diplayObjCont.getChildAt(a); selection.push(child); } trace(selection); that returns just [object MainTimeline] So, can I access layers on this MainTimeline to get all Movie Clips on this layer ? So I can do a simple operation "A_1_2.buttonMode = true;" to all my MC's (in an array for example) without writing every line (lot of MC's on layer and lot of lines).

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  • [as3] Movieclip.width returns higher value than Movieclip stage on Width.

    - by Sawrb
    I have a Movieclip on stage with nested movieclips inside. All referenced at 0,0. None of the child movieclips load any dynamic content, animate or have Masked Layers. It does have an input textfield in one of the child MCs. The parent MC shows 280 px width, while it returns 313 px with a .width trace. There is no code that alters the .width value of the parent MC at run-time. And the ParentMC on stage is not scaled (it is at 100% width/height). Any pointers, to what could be the reasons for the discrepancy in .width values on stage and on run-time? Its breaking the scaling code that follows.

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  • How to handle the close (big X) button at the source?

    - by Simon T.
    We would like under some circumstances to block the action of the close button in the title bar. The problem is that it's a MDI applications and it seems that we will have to add code in each forms to cancel the operation in the Closingevent handler. It seems that the child forms are the first to receive the event. There is no way to add code at a single place to cancel the close operation. Information on how the close event is propagated to the child form would be welcome. Is there a simple way of doing what we want to do?

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  • GWT - Retrieve size of a widget inside an AbsolutePanel

    - by Garagos
    I need to set the size of an absolutePanel regarding to its child size, but the getOffset* methods return 0 because (i think) the child as not been displayed yet. A Quick example: AbsolutePanel aPanel = new AbsolutePanel(); HTML text = new HTML(/*variable lenght text*/); int xPosition = 20; // actually variable aPanel.add(text, xPosition, 0); aPanel.setSize(xPosition + text .getOffsetWidth() + "px", "50px"); // 20px 50px Is there a way to: retrieve the size of a widget that has not been displayed? be notified when a widget is displayed ?

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  • Perl parsing ps fwaux output

    - by Magic Hat
    I am trying to figure out children processes of a given parent from ps fwaux (there may very well be a better way to do this). Basically, I have daemons running that may or may not have a child process running at any given time. In another script I want to check if there are any child processes, and if so do something. If not, error out. ps fwaux|grep will show me the tree, but I'm not exactly sure what to do with it. Any suggestions would be great.

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  • Entity diagram with tables that have foreign keys that point to a non-PK column do not show relation

    - by Jason Coyne
    I have two tables parent and child. If I make a foreign key on child that points to the primary key of parent, and then make an entity diagram, the relationship is shown correctly. If I make the foreign key point to a different column, the relationship is not shown. I have tried adding indexes to the column, but it does not have an effect. The database is sqlite, but I am not sure if that has an effect since its all hidden behind ADO.net. How do I get the relationship to work correctly?

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  • Getting all parent rows in one SQL query

    - by Alex
    I have a simple MySQL table thats contains a list of categories, level is determined by parent_id: id name parent_id --------------------------- 1 Home 0 2 About 1 3 Contact 1 4 Legal 2 5 Privacy 4 6 Products 1 7 Support 1 I'm attempting to make a breadcrumb trail. So i have the 'id' of the child, I want to get all available parents (iterating up the chain until we reach 0 "Home"). There could be any number or child rows going to an unlimited depth. Currently I am using an SQL call for each parent, this is messy. Is there a way in SQL to do this all on one query?

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  • FLEX: how to ignore MouseEvents from the container ?

    - by Patrick
    hi, I've some objects on the canvas, and I added eventListeners to these objects for MOUSE_UP event. I'm know checking if it works by tracing e.target.name, and I found out that the event is triggered twice, before on the element container (Canvas) and then the element itself. I read several times the documentation about Capture, Bubbling etc.. but I don't understand how to trigger the events only from the element itself... child.addEventListener(MouseEvent.MOUSE_UP, updateSelectedTags); private function updateSelectedTags(e:MouseEvent):void { Alert.show(e.currentTarget.name); //I have 2 alerts, one for canvas, the other one for the child } } thanks

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  • Low-overhead way to access the memory space of a traced process?

    - by vovick
    Hello all. I'm looking for an efficient way to access(for both read and write operations) the memory space of my ptraced child process. The size of blocks being accessed may vary from several bytes up to several megabytes in size, so using the ptrace call with PTRACE_PEEKDATA and PTRACE_POKEDATA which read only one word at a time and switch context every time they're called seems like a pointless waste of resources. The only one alternative solution I could find, though, was the /proc/<pid>/mem file, but it has long since been made read only. Is there any other (relatively simple) way to do that job? The ideal solution would be to somehow share the address space of my child process with its parent and then use the simple memcpy call to copy data I need in both directions, but I have no clues how to do it and where to begin. Any ideas?

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  • C# How to Identify Caller for Template Events

    - by mikeknoop
    I have a ListBox container data bound and templatized as so: <ListBox x:Name="ListBox" ItemsSource="{Binding Source={StaticResource List}}" ItemTemplate="{StaticResource ListTemplate}"> </ListBox> Within my ListTemplate resource, I define a Grid which contains a few child elements. I have setup a click event handler on one of child elements. The event hander is not row-specific, and I need a (best practice) way of identifying which row in the ListBox the event fired upon. From my data source, I have an unique ID which corresponds to the row. I do not currently expose this ID in the data binding, though could. Ideally I would like the event handler to be able to identify the ID of the row the event was fired upon. Thank you!

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  • Are browsers permitted to render <ol>s in any order?

    - by ctford
    As I understand the XML spec, the significance of the order of child elements is not guaranteed. XML parsers tend to keep child elements in the same order as they occur in the XML document, but they are under no obligation to do so. If that's so, then are browsers free to render the <li>s in an <ol> in a different order than they occur in the XHTML? Or is it specified in the XHTML spec somewhere that order has to be preserved? I realise that all major browsers will respect the order of my <li>s. I'm just interested in the academic question of whether or not they are technically obliged to.

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