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• Django model manager didn't work with related object when I do aggregated query

  - by Satoru.Logic

  Hi, all. I'm having trouble doing an aggregation query on a many-to-many related field. Let's begin with my models: class SortedTagManager(models.Manager): use_for_related_fields = True def get_query_set(self): orig_query_set = super(SortedTagManager, self).get_query_set() # FIXME `used` is wrongly counted return orig_query_set.distinct().annotate( used=models.Count('users')).order_by('-used') class Tag(models.Model): content = models.CharField(max_length=32, unique=True) creator = models.ForeignKey(User, related_name='tags_i_created') users = models.ManyToManyField(User, through='TaggedNote', related_name='tags_i_used') objects_sorted_by_used = SortedTagManager() class TaggedNote(models.Model): """Association table of both (Tag , Note) and (Tag, User)""" note = models.ForeignKey(Note) # Note is what's tagged in my app tag = models.ForeignKey(Tag) tagged_by = models.ForeignKey(User) class Meta: unique_together = (('note', 'tag'),) However, the value of the aggregated field used is only correct when the model is queried directly: for t in Tag.objects.all(): print t.used # this works correctly for t in user.tags_i_used.all(): print t.used #prints n^2 when it should give n Would you please tell me what's wrong with it? Thanks in advance.

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• Localizing concatenated or dynamic strings

  - by SooDesuNe

  I'm familiar with using NSLocalizedString() to localize strings, but the problem I have today requires a little more finesse. My situation is like this: NSString *userName; //the users name, entered by the user. Does not need localized NSString *favoriteFood; //the users favorite food, also entered by user, and not needing localized NSString *summary = [NSString stringWithFormat:@"%@'s favorite food is %@", userName, favoriteFood]; This works fine for english, but not every language uses the same word ordering as English, for example, a word-by-word translation of the same sentance from Japanese into English would read: UserName's favorite food pizza is Not to mention that 's is doesn't make a possessive in every language. What techniques are available for localizing this type of concatenated sentence?

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• distinct in Xpath ?

  - by Antoine

  Hi, I have this XML file, from which I'd like to count the number of users referenced in it. But they can appear in more than one category, and I'd like these duplicates not to be taken into account. In the example below, the query should return 3 and not 4. Is there a way in XPath to do so? Users are not sorted at all. <list> <group name='QA'> <user name='name1'>name1@email</user> <user name='name2'>name2@email</user> </group> <group name='DEV'> <user name='name3'>name3@email</user> <user name='name2'>name2@email</user> </group> </list>

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• Best Fit Scheduling Algorithim

  - by Teegijee

  I'm writing a scheduling program with a difficult programming problem. There are several events, each with multiple meeting times. I need to find an arrangement of meeting times such that each schedule contains any given event exactly once, using one of each event's multiple meeting times. Obviously I could use brute force, but that's rarely the best solution. I'm guessing this is a relatively basic computer science problem, which I'll learn about once I am able to start taking computer science classes. In the meantime, I'd prefer any links where I could read up on this, or even just a name I could Google.

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• WPF: isolated storage file path too long

  - by user342961

  Hi, I'm deploying my WPF app with ClickOnce. When developing locally in Visual Studio, I store files in the isolated storage by calling IsolatedStorageFile.GetUserStoreForDomain(). This works just fine and the generated path is C:\Users\Frederik\AppData\Local\IsolatedStorage\phqduaro.crw\hux3pljr.cnx\StrongName.kkulk3wafjkvclxpwvxmpvslqqwckuh0\Publisher.ui0lr4tpq53mz2v2c0uqx21xze0w22gq\Files\FilerefData\-581750116 (189 chars) But when I deploy my app with ClickOnce, the generated path becomes too long, resulting in a DirectoryNotFoundException when creating the isolated storage directory. The generated path with ClickOnce is: C:\Users\Frederik\AppData\Local\Apps\2.0\Data\OQ0LNXJT.R5V\8539ABHC.ODN\exqu..tion_e07264ceafd7486e_0001.0000_b8f01b38216164a0\Data\StrongName.wy0cojdd3mpvq45404l3gxdklugoanvi\Publisher.ui0lr4tpq53mz2v2c0uqx21xze0w22gq\Files\FilerefData\-581750116 (247 chars) When I browse the folders all but the last directory of the path exists. Then when trying to create a folder at this location windows tells me I can't create a directory because the resulting path name will be too long. How can I shorten the path generated by the IsolatedStorage?

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• Outlook 2003 Add-In Setup Project with COM DLL Deployment Problem

  - by Malkier

  Hi, I developed an Outlook 2003 add-in which uses the com dll redemption. I created a visual studio 2008 setup project, added a custom action to run "caspol.exe -machine -addgroup 1 -strong -hex [key] -noname -noversion FullTrust -n \"Name\" -description \"desc\" and moved the registry keys under software to HKLM as described in http://msdn.microsoft.com/en-us/library/cc136646.aspx#AutoDeployVSTOse_InstallingtheAddinforAllUsers to ensure all-users compatibility. I included the redemption.dll in the setup with vsdrfCOMSelfReg (vsdrfCOM throwed an error). My problem is: When installing the setup on a test machine under an admin account, it runs fine under all users, however when we use the company wide software deployment which runs under a system account the setup executes but the add-in wont load. If I repair the installation with an admin account again it loads just fine. Shouldn't a system account have the required permissions to install all of the components? What options do I have? Thanks for any suggestions.

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• spring add default value to form:select

  - by Mike

  I'm developing a spring application, now I've added a dropdownlist to one of my jsp pages using: <form:select multiple="single" path="users[y.count-1].X" items="${Y}" itemValue="id" itemLabel="name"/> Now I'd like to add the default value "Nothing selected", however I can't seem to find how to do this. I've tried: <form:select multiple="single" path="users[y.count-1].X" items="${Y}" itemValue="id" itemLabel="name"> <form:option value="Nothing selected" /> </form:select> But "Nothing selected" isn't displayed in my dropdownlist.

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• Drupal auto change user role in module

  - by Marques

  I am trying to write a module that will change a user's permissions once a node form is inserted into the database. I already have a role assigned when a user registers, but i want that role to be changed once they create a 'company' profile in this case which is when they fill out a cck form of 'company_post' type. My code is below... switch ($op) { case 'insert': if ($node->type == 'company_post') { } ? im not sure what to put in the if statement because I don't really know how to reference the users roles or how to change them. ? So my question is what code can I use to change the users current role to a new role? (Both roles are already created in drupal and have seperate permissions)

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• SubSonic IQueryable To String Array

  - by Daniel Draper

  Hey All, I have decided to use SubSonic (v3.0) for the first time and thoroughly enjoy it so far however I seem to have stumbled and I am hoping there is a nice neat solution. I have a users, roles and joining table. SubSonic (ActiveRecord) generated an entity User for my users table. A property of User is UserRoles and is of the type IQueryable this is my joining table. I want to convert the IQueryable column name RoleName to a string array. I have only just started playing with Linq as well and know of ToArray() but seem to be missing something or this isn't the function I want. I could iterate over each item in the UserRoles property but seems a little excessive. I appreciate your help! Cheers.

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• PocketSphinx, file is not of required architecture in iPhone Device but working in simulator?

  - by Jeevan

  Hello all, I'm new to apple development, For my Uni project I try developing an application for iPhone using PocketSphinx to recognise speech commands... I used the "build_for_iphoneos.sh" script available in PocketSphinx SVN and SphinxBase. Program working without any issues when i try it on simulator, today I try to deploy on device and it's giving me this error? can any one help me solve this please? Error: ld: warning: in /Users/me/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.1.2.sdk/lib/libpocketsphinx.a, file is not of required architecture ld: warning: in /Users/me/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.1.2.sdk/lib/libsphinxbase.a, file is not of required architecture and the rest of the references to functions report undefined error! any help? Thanks. Jeevan

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• How to serialize a collection of base type and see the concrete types in easy to read XML

  - by Jason Coyne

  I have a List which is populated with objects of various concrete types which subclass BaseType I am using the WCF DataContractSerializer <Children> <BaseType xmlns:d3p1="http://schemas.datacontract.org/2004/07/Tasks" i:type="d3p1:ConcreteTypeA"></BaseType> <BaseType xmlns:d3p1="http://schemas.datacontract.org/2004/07/Tasks" i:type="d3p1:ConcreteTypeB"></BaseType> </Children> Is there any way to get this to generate <Children> <ConcreteTypeA/> <ConcreteTypeB/> </Children> ? The real goal is to let users generate some XML to load into memory, and the users are of a skill level that asking them for the original XML is not going to be successful.

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• ffmpeg-php permission denied on localhost

  - by user572271

  Hello, I am very new to php. I recently setup php on my mac and I am trying to setup ffmpeg-php to convert various videos to flv or other formats as desired. I used this tutorial FFmpeg Mac Installation and I got ffmpeg to work using the terminal, however, when I try to encode a movie using php I get an error. In my apache error_log file it says permission denied next to the flv file (shown below). FFmpeg version 0.6, Copyright (c) 2000-2010 the FFmpeg developers built on Dec 30 2010 08:36:24 with gcc 4.2.1 (Apple Inc. build 5646) (dot 1) configuration: --prefix=/usr/local --enable-shared --disable-mmx --enable-libmp3lame --enable-gpl --enable-libfaad --enable-zlib --enable-libvorbis --enable-libfaac --enable-nonfree libavutil 50.15. 1 / 50.15. 1 libavcodec 52.72. 2 / 52.72. 2 libavformat 52.64. 2 / 52.64. 2 libavdevice 52. 2. 0 / 52. 2. 0 libswscale 0.11. 0 / 0.11. 0 Seems stream 1 codec frame rate differs from container frame rate: 1200.00 (1200/1) - 30.00 (30/1) Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/myApple/Sites/AdHere/test.mov': Metadata: major_brand : qt minor_version : 537199360 compatible_brands: qt Duration: 00:00:02.04, start: 0.000000, bitrate: 1109 kb/s Stream #0.0(eng): Audio: aac, 44100 Hz, stereo, s16, 97 kb/s Stream #0.1(eng): Video: h264, yuv420p, 640x480, 1027 kb/s, 30.15 fps, 30 tbr, 600 tbn, 1200 tbc /Users/myApple/Sites/AdHere/movteststuff.flv: Permission denied I have no idea what the problem is. I am using the following php code: <?php extension_loaded('ffmpeg') or die('Error in loading ffmpeg'); $ffmpegInstance = new ffmpeg_movie('test.AVI'); echo "getDuration: " . $ffmpegInstance->getDuration() . "<br>getFrameCount: " . $ffmpegInstance->getFrameCount() . "<br>getFrameRate: " . $ffmpegInstance->getFrameRate() . "<br>getFilename: " . $ffmpegInstance->getFilename() . "<br>getComment: " . $ffmpegInstance->getComment() . "<br>getTitle: " . $ffmpegInstance->getTitle() . "<br>getAuthor: " . $ffmpegInstance->getAuthor() . "<br>getCopyright: " . $ffmpegInstance->getCopyright() . "<br>getArtist: " . $ffmpegInstance->getArtist() . "<br>getGenre: " . $ffmpegInstance->getGenre() . "<br>getTrackNumber: " . $ffmpegInstance->getTrackNumber() . "<br>getYear: " . $ffmpegInstance->getYear() . "<br>getFrameHeight: " . $ffmpegInstance->getFrameHeight() . "<br>getFrameWidth: " . $ffmpegInstance->getFrameWidth() . "<br>getPixelFormat: " . $ffmpegInstance->getPixelFormat() . "<br>getBitRate: " . $ffmpegInstance->getBitRate() . "<br>getVideoBitRate: " . $ffmpegInstance->getVideoBitRate() . "<br>getAudioBitRate: " . $ffmpegInstance->getAudioBitRate() . "<br>getAudioSampleRate: " . $ffmpegInstance->getAudioSampleRate() . "<br>getVideoCodec: " . $ffmpegInstance->getVideoCodec() . "<br>getAudioCodec: " . $ffmpegInstance->getAudioCodec() . "<br>getAudioChannels: " . $ffmpegInstance->getAudioChannels() . "<br>hasAudio: " . $ffmpegInstance->hasAudio(); exec('ffmpeg -i /Users/myApple/Sites/AdHere/test.mov /Users/myApple/Sites/AdHere/movteststuff.flv'); ?> I am able to see various parameters like filename, frameheight, framewidth, which leads me to believe that ffmpeg-php is kind of working, but maybe I am just doing something wrong in the exec() command. Anyone have any ideas. I have been struggling with setting up ffmpeg for quite some time now. Thanks! -Jon

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• Appscript to write iTunes artwork

  - by Kartik Aiyer

  I'm trying to capture artwork from a pict file and embed into a track on iTunes using python appscript. I did something like this: imFile = open('/Users/kartikaiyer/temp.pict','r') data = imFile.read() it = app('iTunes') sel = it.current_track.get() sel.artworks[0].data_.set(data[513:]) I get an error OSERROR: -1731 MESSAGE: Unknown object Similar applescript code looks like this: tell application "iTunes" set the_artwork to read (POSIX file "/Users/kartikaiyer/temp.pict") from 513 as picture set data of artwork 1 of current track to the_artwork end tell I tried using ASTranslate but it never instantiates 'the_artwork' and then throws an error when there is a reference to the_artwork. Can anyone help. I'm new to appscript and python in general.

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• Mulitple .edmx files

  - by Shetty

  What are the key points to be considered when deviding the .edmx (Entity framework) to multiple files for a large database?

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• asp.net search application index update help

  - by srinivasan

  hi im developing a simple search application( ASP.Net VB.Net) the index table is actually a hash table ll be stored in my file system. the search page ll open this in read mode n copy this to a hash table object n perform search. other update n delete functions will open this in write mode n update it. what should i ve to do to make this app correct that there shud not be any execption when multiple user accessing these things at the same time. wat do i ve to do to make this robust and error free. i want multiple users to access search page without any problem n the index updation also in a parallel manner thanks srinivasan

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• ASP.net displaying data from SQL data source

  - by c11ada

  hey all, im using linq2SQL to grab information from my SQL database, i have a gridview which shows all the top level information, in this case a list of groups (i.e admin, users and so on) when a user clicks say the admin group, i want to be able to show each member in that group, i have the following code which grabs the information from the database, DataClassesDataContext dc = new DataClassesDataContext(); GridViewRow row = GridView1.SelectedRow; var query1 = from p in dc.Users where p.groups.GroupID == Int32.Parse(row.Cells[1].Text) select new { p.Name, p.Address, p.Contact Number, p.Bio, }; i no i can use gridview again to display the results of the query, but this doesnt really look nice as it shows too much information at one, how would i go about having some sort of display which will show just one user at a time giving me the chance to click next and back ? thanks

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• How to handle concurrent web requests

  - by Rajan

  I am having a simple webservice running in my local system, hosted in IIS 6.0. This webservice is accessible from any other system (within LAN and Internet) and everything works fine as long as the number of systems accessing my webservice is very much limited. Whereas, if more number of users (say 500) are concurrently trying to access my webservice, an exception is thrown saying 'Server is busy'. When i browsed in net, i found that IIS can handle only 100-150 web requests concurrently. What should i do to make my webservice accessible from more than 500 users, concurrently? Thanks in advance. Rajan.

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• Acquiring Table Lock in Database - Interview Question

  - by harigm

  One of my interview Questions, if multiple users across the world are accessing the application, in which it uses a Table which has a Primary Key as Auto Increment Field. The Question how can you prevent the other user getting the Same Primary key when the other user is executing? My answer was I will obtain the Lock on the table and I will make the user to wait Until that user is released with the Primary key. But the Question How do you acquire the Table lock programmatically and implement this? If there are 1000 users coming every minute to the application, if you explicity hold the lock on the table, then the application will become slower? How do you manage this? Please suggest the possible answers for the above question

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• Wrapping WPF UserControl inside VisualStudio Item Template

  - by karthik84

  I am currently started working on a project which will allow users to design reports inside visual studio. Previously, for my similar Winforms App, I had extended the IComponent (Component Class) and wrote our VS Like designer kind of custom control which will allow users to drag drop controls from the visual studio toolbox and then I export it as a VisualStudio C#&VB ItemTemplate. Now I am trying to recreate the same control using WPF considering its power, extensiblity. Could anyone shed some lights on this, on what would be the most preferable way of doing this ? Thanks in advance.

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• Creating a subscription based website in ASP.NET

  - by DotnetDude

  I'd like to update my website to make it subscription based. It's a ASP.NET Web forms project. I am looking for the following functionality: Ability to have users sign up for different plans (Gold, Premium etc) Ability to have users upgrade / downgrade to and from plans Ability to hook this up to a Payment processor Ability to have a credit based system (User buys x credits for $y) as an alternative to plans in (1) Most of this functionality (if not all) is supported by a large number of websites which makes me think I can leverage on an existing framework instead of re-inventing the wheel. Any thoughts?

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• Real time web services

  - by daliz

  Hi everybody, I have a little (maybe the answer could require a book) question about web services and server side programming. But first, a little preamble. Recently we have seen new kind of applications & games using some kind of real-time interaction with a database, or more generally, with other users. I'm talking about shared drawing canvas, games like this , or simple chats, or the Android app "a World of Photo", where in real time you see who is online, to share your photos, etc. Now my question: Are all these apps based on classic TCP client/server architectures or is there a way to make them in a simpler way, like a web platform like LAMP? What I'm asking, in other words is: Can PHP+MySQL (or JSP, or RoR, or any other server language) provide a way to make online users communicate in real time and share data? Is there a way to do that without the ugly and heavy mechanism of temporary tables? Thank you! I hope I've been clear.

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• django authentication .htaccess static

  - by Uszy Wieloryba

  In my app users can upload files for other users. To make the uploaded files accesible only for the addresse I need some kind of static files authentication system. My idea, is to create the apache hosted directory for each user and to limit access to this derectory using .htaccess. This means that each time new django user is created, I need to create a directory and the appropriate .htaccess file in it. I know I should do it using post_save signals on User model but I don't know how to create the .htaccess in the user's directory from python level. Can you help me with that? Or perhaps you have better solution to my problem?

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• What is the best server side solution for a real-time GPS tracking system

  - by Ayman

  Well, I tried to ask this question as a comment on this question, but I thought that maybe no one will notice it, so I decided to ask it as a separate one. The question is about how to do real-time GPS tracking system things; if we have the following scenario: Rather than connecting a GPS receiver to a PC, the user will have a mobile device with an integrated GPS receiver. Location data will be sent over mobile network using GPRS data connection to a server side. The data will be processed and a KML path file will be created and updated on time intervals and used to track the user using Google Earth. The question is: what is the best method to accomplish this scenario for the server side; is it a web service, a web application, a windows service, a windows application or what exactly? Taking into account that the system will serve a number of users simultaneously, and that more users may use the system in the future(scalability issues). Thank you in advance and I highly appreciate any help :)

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• jQuery autocomplete function, how to add support for words not available in the database yet?

  - by Lyon

  Hi, I'm looking to implement a tag system like how SO uses on their site, where users can specify multiple tag words. However, on top of all the other autocomplete functions available as jquery plugins, I also want to allow users to enter new words not in the database. Does anyone know of any plugin that can do that? Or if there isn't, how one can add that functionality to an existing autocomplete function? I'm exploring Drew Wilson's autosuggest plugin at the moment, as it supports multiple tags well: http://code.drewwilson.com/entry/autosuggest-jquery-plugin Any help appreciated! Thanks :)

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• JavaScript private methods

  - by Wayne Kao

  To make a JavaScript class with a public method I'd do something like: function Restaurant() { } Restaurant.prototype.buy_food = function() { // something here } Restaurant.prototype.use_restroom = function() { // something here } That way users of my class can: var restaurant = new Restaurant(); restaurant.buy_food(); restaurant.use_restroom(); How do I create a private method that my public buy_food and use_restroom methods can call but that users of the class can't call externally. In other words, I want my method implementation to be able to do: Restaurant.prototype.use_restroom = function() { this.private_stuff(); } But this shouldn't work: var r = new Restaurant(); r.private_stuff(); How do I define private_stuff as a private method so both of those hold true? I've read Doug Crockford's writeup a few times but it doesn't seem like "private" methods can be called by public methods and "privileged" methods can be called externally.

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