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Articles indexed Sunday June 6 2010

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  • Rails migration to add boolean column to Postgres on Heroku

    - by pmc255
    I'm trying to execute a simple Rails migration to add a boolean column to an existing table. Here's the add_column call: add_column :users, :soliciting, :boolean, :null => false, :default => false However, after the migration runs (successfully, with no errors), I don't see the new column. If I go into the console and list the columns on the User table, for example, with this command: >> User.columns.each { |c| puts "#{c.name} : #{c.type}" } All the other columns show up, but not the one I just added with the migration. What's even more strange is that looking up a random user object yields the Postgres version of booleans (Ruby strings) >> User.find(1).soliciting => "t" However, the existing boolean columns all show up with standard Ruby boolean values of true and false. What's going on here? Is the migration actually complete? Why doesn't the column show up, yet is accessible in the model objects?

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  • Eclipse adding your own build command

    - by user319873
    I am new to eclipse and wanted to do the following;- 1) how to use my custom build commands with eclipse. Till now I only saw make all?I use a shell script for building my project, how can I use that in eclipse environment. 2) When I create a new project with the existing source code, it doesn't add the files, without building the code and if code fails to build (because I generally don't have make all). How to resolve this issue

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  • Custom UIButton for Iphone.

    - by Amal
    I have an view in my App which has a number of buttons based on the number of items returned by the server. So if the server returns say 10 items, there should be 10 buttons and clicking on each button should call a different person. For the above purpose I created a custom button class deriving from UIButton. @implementation HopitalButton @synthesize index; @synthesize button_type; - (id)initWithFrame:(CGRect)frame { if (self = [super initWithFrame:frame]) { UIImage* img = [UIImage imageNamed:@"dr_btn.png"]; [img stretchableImageWithLeftCapWidth:10 topCapHeight:10]; [self setBackgroundImage:img forState:UIControlStateNormal]; [self setTitleColor:[UIColor colorWithRed:0.698 green:0.118 blue:0.376 alpha:1] forState:UIControlStateNormal] ; [self setFont:[UIFont fontWithName:@"Helvetica Bold" size:13]]; self.titleLabel.textColor = [UIColor colorWithRed:178 green:48 blue:95 alpha:1]; self.adjustsImageWhenHighlighted = YES; } return self; } - (void)dealloc { [super dealloc]; } @end Now the problem with the above code is that it does not create buttons that look similar to the buttons created by default in Interface builder. The borders are missing. And I create buttons of the above type by the following code: HopitalButton* hb = [[HopitalButton alloc] init]; hb.button_type = @"call"; hb.frame = CGRectMake(50, 50 + i * 67, 220, 40); [self.scroll_view addSubview:hb]; [hb setTitle:[[[self.office_full_list objectAtIndex:i] objectForKey:@"Staff" ]objectForKey:@"FullName"] forState:UIControlStateNormal]; hb.index = [NSNumber numberWithInt:[self.button_items count]]; [self.button_items insertObject:hb atIndex:[self.button_items count]]; [hb addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside]; I am not finding a way to set the button type for this custom button. Is there a way i can do it ? Or is there a better way to design the code.

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  • How do I access database from WF4?

    - by Patrol02
    Hi Guys, I host a wcf workflow service within my ASP.NET MVC2 application. I need to be able to load/save data inside my workflow (WF4). How it can be done? Should I just instantiate my Entity Framework context within my activities and read/write? Cheers.

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  • UDP Broadcast stress

    - by Ori Cohen
    I am writing an application that relies on UDP Broadcasting. Does anyone know what kind of stress this puts on your network? I would like to have multiple clients on the same network broadcasting frequently. Any information on this would be helpful Thanks

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  • Qt not displaying PNG images on Linux

    - by ereOn
    Hi, I have a software written using Qt which is meant to work on both Windows and Linux. I use PNG images as icons for my QActions, embedded in a resource. I have the following tree directory: / resources/ icons.qrc image.png Here is the content of icons.qrc: <RCC> <qresource prefix="/resources" lang="fr"> <file alias="image.png">image.png</file> </qresource> </RCC> I declare my QIcon like that: QIcon(":/resources/image.png") Under Windows, it works well but on Linux (I only tried on Ubuntu 10.4 so far), the images aren't displayed. Is there anything special I have to do for this to work ? Is this a configuration problem ? Thank you.

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  • Updates and New Home for Sticky Plugin

    Ive created a permanent home for the latest updates for Sticky. Please visit http://johnpapa.net/sticky to stay updated on the latest versions, enhancements, and how tos for Sticky. To download the latest update go here. The latest update includes some bug fixes and added a few enhancements in the latest version: 1.0.50605. Here are the highlights: Choose your Sticky color in the Settings Numbers are formatted Better error handling for invalid data Minor graphical fixes The Settings...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • how to tell which object called a delegate method (objective c)

    - by user353877
    Let's say you have two objects (UITextviews) in your class. When the text view changes, you have a delegate method that catches the change.. but how can you tell programatically WHICH object was changed and called the delegate ?? I have to be missing something, because this should be trivial, but I couldnt find anything. Note: In this case, its not possible to just break up the class to only have one object (there by bypassing ambiguity).. I looked for things like assigned variable names for nsobjects, nothing there

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  • Dynamically creating a TreeViewin HTML with indent lines in ASP.NET

    - by Ben
    Hi, i'm quite new to HTML, and am trying to create a professional looking TreeView. I can not use the in built TreeView in ASP.NET as i need to point the target of the selection to another frame (I have tried, and this doesn't seem possible). My TreeView is built up as follows: Folder1 ChildOne ChildTwo ChildThree Folder2 ChildOne ChildTwo ChildThree I have the collapsing of the folders working, but would like to know how to format this TreeView so it has dotted lines down to the child nodes (as most TreeViews tend to have). How would i go about this? Cheers.

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  • Invalid iPhone Application Binary

    - by Kristopher Johnson
    I'm trying to upload an application to the iPhone App Store, but I get this error message from iTunes Connect: The binary you uploaded was invalid. The signature was invalid, or it was not signed with an Apple submission certificate. My guess is that it is not properly signed. I have downloaded my App Store distribution certficate, but I can't figure out how to "sign" my application with it. The SDK's documentation about code signing is not very helpful. (FWIW, I can install the app on my iPhone just fine using the development provisioning profile.) However, it is possible that I screwed things up on a more basic level. Here's what I did to try to prepare it for upload: In Xcode, select the Device|Release target Select the target and click the Info button. Change "Code Signing Identity" to "iPhone Distribution", and change "Code Signing Provisioning Profile" to my App Store distribution profile. Build Go to the directory where the built MyApp.app bundle is, control-click and choose "Compress" to create MyApp.zip Upload MyApp.zip to the App Store via iTunes Connect (which resulted in the above error message). Can anybody give me any hints? Edit: Found someone with the same problem. Unfortunately, he won't tell us how he fixed it. http://www.rhonabwy.com/wp/2008/07/18/seattlebus-diary-ongoing-update-saga/#comments http://www.rhonabwy.com/wp/2008/07/22/seattlebus-diary-update-is-pending-review/ (Note: For general information on submitting iPhone applications to the App Store, see Steps to upload an iPhone application to the AppStore.)

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  • MD5 hash with salt for keeping password in DB in C#

    - by abatishchev
    Could you please advise me some easy algorithm for hashing user password by MD5, but with salt for increasing reliability. Now I have this one: private static string GenerateHash(string value) { var data = System.Text.Encoding.ASCII.GetBytes(value); data = System.Security.Cryptography.MD5.Create().ComputeHash(data); return Convert.ToBase64String(data); }

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  • nhibernate : a different object with the same identifier value was already associated with the sessi

    - by frosty
    I am getting the following error when i tried and save my "Company" entity in my mvc application a different object with the same identifier value was already associated with the session: 2, of entity: I am using an IOC container private class EStoreDependencies : NinjectModule { public override void Load() { Bind<ICompanyRepository>().To<CompanyRepository>().WithConstructorArgument("session", NHibernateHelper.OpenSession()); } } My CompanyRepository public class CompanyRepository : ICompanyRepository { private ISession _session; public CompanyRepository(ISession session) { _session = session; } public void Update(Company company) { using (ITransaction transaction = _session.BeginTransaction()) { _session.Update(company); transaction.Commit(); } } } And Session Helper public class NHibernateHelper { private static ISessionFactory _sessionFactory; const string SessionKey = "MySession"; private static ISessionFactory SessionFactory { get { if (_sessionFactory == null) { var configuration = new Configuration(); configuration.Configure(); configuration.AddAssembly(typeof(UserProfile).Assembly); configuration.SetProperty(NHibernate.Cfg.Environment.ConnectionStringName, System.Environment.MachineName); _sessionFactory = configuration.BuildSessionFactory(); } return _sessionFactory; } } public static ISession OpenSession() { var context = HttpContext.Current; //.GetCurrentSession() if (context != null && context.Items.Contains(SessionKey)) { //Return already open ISession return (ISession)context.Items[SessionKey]; } else { //Create new ISession and store in HttpContext var newSession = SessionFactory.OpenSession(); if (context != null) context.Items[SessionKey] = newSession; return newSession; } } } My MVC Action [HttpPost] public ActionResult Edit(EStore.Domain.Model.Company company) { if (company.Id > 0) { _companyRepository.Update(company); _statusResponses.Add(StatusResponseHelper.Create(Constants .RecordUpdated(), StatusResponseLookup.Success)); } else { company.CreatedByUserId = currentUserId; _companyRepository.Add(company); } var viewModel = EditViewModel(company.Id, _statusResponses); return View("Edit", viewModel); }

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  • mouseOver event-mapping on iPad Safari with webkit-user-select: none

    - by Tim
    I don't have an iPad yet to find this out; have had only a brief opportunity to look at one at the Apple store. Could someone please describe what, if anything, happens to the mouseOver event of an image-map area when the image-map|area has had user-select disabled with "webkit-user-select: none" in the CSS, as described here in section 5: http://developer.apple.com/safari/library/technotes/tn2010/tn2262/index.html When a finger tip is placed on the image-map area and held there (i.e.not a tap) is the mouseOver eventhandler invoked under those circumstances? Or does nothing happen other than the image-map area doesn't change color because it's now unselectable? In my brief experience with the iPad at the Apple store, when user-select is not disabled, and the image-map area has a mouseOver eventhandler, a tap fires the mouseOver event rather than the click event. Thanks

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  • how to design a database for a specific website.

    - by Steven Spielberg
    i want to design a Database for a website. how i can design it better. are you know any particular thing, tips , technique to design it in better way. in a table of information user can allow to website to show it or hide it. how can i do this like info1 = show info2 = show info3 = show i have a much more field that user can be showed and hide. how i can handle this situation or condition in Database

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  • Word automation - SaveAs

    - by nXqd
    I try to write a simple MFC - Word Automation to save for every 1 minute. I follow this article : http://www.codeproject.com/KB/office/MSOfficeAuto.aspx And this is what Im trying to implement , I'm new to COM so I think there's problem here: my VBA is generated by Word 2010: ActiveDocument.SaveAs2 FileName:="1.docx", FileFormat:=wdFormatXMLDocument _ , LockComments:=False, Password:="", AddToRecentFiles:=True, _ WritePassword:="", ReadOnlyRecommended:=False, EmbedTrueTypeFonts:=False, _ SaveNativePictureFormat:=False, SaveFormsData:=False, SaveAsAOCELetter:= _ False, CompatibilityMode:=14 And my code to implement VBA code above : { COleVariant varName(L"b.docx"); COleVariant varFormat(L"wdFormatXMLDocument"); COleVariant varLockCmt((BYTE)0); COleVariant varPass(L""); COleVariant varReadOnly((BYTE)0); COleVariant varEmbedFont((BYTE)0); COleVariant varSaveNativePicFormat((BYTE)0); COleVariant varForms((BYTE)0); COleVariant varAOCE((BYTE)0); VARIANT x; x.vt = VT_I4; x.lVal = 14; COleVariant varCompability(&x);; VARIANT result; VariantInit(&result); _hr=OLEMethod( DISPATCH_METHOD, &result, pDocApp, L"SaveAs2",10, varName.Detach(),varFormat.Detach(),varLockCmt.Detach(),varPass.Detach(),varReadOnly.Detach(), varEmbedFont.Detach(),varSaveNativePicFormat.Detach(),varForms.Detach(),varAOCE.Detach(),varCompability.Detach() ); } I get no error from this one, but it doesn't work.

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  • How stable is zfs-fuse 0.6.9 on Linux?

    - by Mavrik
    I'm thinking of using ZFS for my home-made NAS array. I would have 4 HDDs in raidz on a Ubuntu Server 10.04 machine. I'd like to use the snapshot capability and dedup when storing data. I'm not so much concerned about the speed, since the machine is accessed via N wireless network and that is probably going to be the bottleneck. So does anyone have any practical experience with zfs-fuse 0.6.9 on such (or simillar) configuration?

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  • Alt+click-drag window resizing on a Mac? (Similar to X-Windows)

    - by Aaron F.
    Is there a way I can get this behavior on Mac OS? alt + right-click-drag will resize the window, relative to where you've clicked within the window and the window's center alt + left-click-drag will move the window, regardless of where you've clicked within the window. There's a Windows port of this behavior as well: http://www.codeproject.com/KB/DLL/wm.aspx

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