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  • Rails STI validation inheritance

    - by KARASZI István
    Dear Rails users! I have STI models in my Rails application. The ancestor model has validations with the validates_... methods which are working fine. But I have custom validations as well, and I would like to add more different custom validations in the descendants. These custom validations would depend on the class. If I write class DescendantA < Ancestor protected def validate # ... end end It simply overwrites the original validations. Is there a convention to do this in Rails?

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  • "User-defined type not defined" error in VB 6 under Windows 7

    - by sunil.nishad87
    I am using Windows 7 and my project is in VB 6.0. I am getting errors while I am executing my program. It shows the error: User-defined type not defined. Here is my code: Private Sub Toolbar1_ButtonClick(ByVal Button As MSComctlLib.Button) Select Case Button.Key Case "trace": Call mntrace_Click Case "snrplot": Call mnSnrplot_Click Case "skyplot": Call mnskyplot_Click Case "nmea": Call mnNmea_Click Case "navigation": Call mnNavigation_Click Case "survey": Call mnSurvey_Click Case "pause/start": Call mnpause_Click Case "save": Call mnsave_Click Case "print": Call mnprint_Click Case "offline": Call mnoffline_Click End Select End Sub How can I solve this error?

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  • android playback suddenly stopping...

    - by user306517
    I have an app that is streaming audio content and sometimes it just stops all of the suddent. the logcat windows shows -- AudioHardware pcm playback is going to standby and that's it. I saw on another thread (pun intended) that someone was saying it was because he was using too many threads. Could that really be causing this? Could i give the audio thread higher priority? Anyway to prevent the audio hardware pcm from going to standby?

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  • Rails Named Scope and overlapping conditions

    - by Tumtu
    Hi everyone, have a question about rails SQL generation: class Organization < ActiveRecord::Base has_many :people named_scope :active, :conditions => { :active => 'Yes' } end class Person < ActiveRecord::Base belongs_to :organization end Rails SQL for all active people in the first organiztion Organization.first.people.active.all [4;36;1mOrganization Load (0.0ms)[0m [0;1mSELECT TOP 1 * FROM [organizations] [0m [4;35;1mPerson Load (0.0ms)[0m [0mSELECT * FROM [people] WHERE ((([people].[active] = 'Yes') AND ([people].organization_id = 1)) AND ([people].organization_id = 1)) [0m Why Rails generates "[people].organization_id = 1" condition twice ? Does someone know how to make it DRY ? e.g. SELECT * FROM [people] WHERE (([people].[active] = 'Yes') AND ([people].organization_id = 1))

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  • how to change the value to a name depending on case

    - by ZeroSoul13
    i've created a select button with 3 option <%= f.label :prioridad %><br/> <%= f.select :prioridad, options_for_select([['Alta', 1], ['Medio', 2], ['Baja', 3]]) %> The value gets inserted to the DataBase but when i display it i see the number op the option selected (which is correct). What i would like to know is how i can change that so on the index the user can see the name and not the value: def convertidor case llamada.prioridad when prioridad == '1' puts "Alta" when prioridad == '2' puts "Media" else puts "Baja" end end This didn't worked. Regars

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  • sql server 2008 multiple inserts over 2 tables

    - by Rob
    I got the following trigger on my sql server 2008 database CREATE TRIGGER tr_check_stoelen ON Passenger AFTER INSERT, UPDATE AS BEGIN IF EXISTS( SELECT 1 FROM Passenger p INNER JOIN Inserted i on i.flight= p.flight WHERE p.flight= i.flightAND p.seat= i.seat ) BEGIN RAISERROR('Seat taken!',16,1) ROLLBACK TRAN END END The trigger is throwing errors when i try to run the query below. This query i supposed to insert two different passengers in a database on two different flights. I'm sure both seats aren't taken, but i can't figure out why the trigger is giving me the error. Does it have to do something with correlation? INSERT INTO passagier VALUES (13392,5315,3,'Janssen Z','2A','October 30, 2006 10:43','M'), (13333,5316,2,'Janssen Q','2A','October 30, 2006 11:51','V')

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  • Streaming audio to headless linux box

    - by Ralph
    I have a dual boot (Win 7 + Ubuntu) PC connected via wifi with my music collection on a local HDD. I usually use Rhythmbox on Ubuntu or Winamp on Windows to listen to my music but I'll change if I have to. I also have a Raspberry Pi (low power PC running Debian) in the living room that is usually headless and connected via ethernet. The Raspberry Pi is also connected to my living room speakers via an amp. I would like to be able to stream music from my PC over the network to the linux raspberry pi. What software can I use to do this? Some sort of audio client\server?

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  • GetdataBy date doesn't work Why?

    - by vp789
    I am trying to pull the data by date in vb.net. It is not throwing the error nor giving any result. Whereas It shows the results in table adapter configuration wizard when I try through query builder. I am using date time picker in the form. But I have formatted the date in the database as date.I am puzzled. Private Sub ToolStripButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ToolStripButton1.Click Try Dim dt As Date = CDate(tspTextDate.Text) Me.Bank_transactionsTableAdapter.GetDataByDate(dt) 'Catch ex As Exception Catch ex As FormatException MessageBox.Show("date is wrong", "Entry Error") Catch ex As SqlException MessageBox.Show("SQL Server error#" & ex.Number _ & ":" & ex.Message, ex.GetType.ToString) End Try End Sub rows of data BT102 4/5/2010 BKS 200.00 1200.00 1400.00 BT103 4/5/2010 BKS 200.00 1400.00 1600.00 BT105 4/6/2010 BKS 200.00 1800.00 1800.00

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  • nodejs response speed and nginx

    - by user1502440
    I'm just started testing nodejs, and wanted to get some help in understanding following behavior: Example #1: var http = require('http'); http.createServer(function(req, res){ res.writeHeader(200, {'Content-Type': 'text/plain'}); res.end('foo'); }).listen(1001, '0.0.0.0'); Example #2: var http = require('http'); http.createServer(function(req, res){ res.writeHeader(200, {'Content-Type': 'text/plain'}); res.write('foo'); res.end('bar'); }).listen(1001, '0.0.0.0'); When testing response time in Chrome: example #1 - 6-10ms example #2 - 200-220ms But, if test both examples through nginx proxy_pass server{ listen 1011; location / { proxy_pass http://127.0.0.1:1001; } } i get this: example #1 - 4-8ms example #2 - 4-8ms I am not an expert on either nodejs or nginx, and asking if someone can explain this? nodejs - v.0.8.1 nginx - v.1.2.2

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  • Running on Windows CE 6 'and' Windows XP

    - by Psychic
    Is it possible to create a small program that will run, without recompiling and without emulators, on both Windows CE 6 AND Windows XP SP3? From my knowledge, this isn't possible. Source code needs to be recompiled for the target platform. However, a hardware manufacturer for embedded boards is claiming otherwise. The application isn't anything complex, just a simple benchmarking tool analysing floating point operations, CPU ticks etc, and displaying the results on a plain GUI.

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  • Pascal - bad number format

    - by Donator
    Program: program s; type info = record name, surname: string; min, sek: integer; end; type arrays = array[1..50] of info; var c, b: text; A: arrays; gr_sk, grup_dal: integer; begin assign(c, 'info.txt'); reset(c); read(c, gr_sk); read(c, grup_dal); id := 1; read(c, A[id].name); read(c, A[id].sek); close(c); end. info.txt file: 3 4 yhgf 4 Please, tell me what is wrong with that. It says that it is bad number format for line 19 I guess.

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  • save and play recorded sound

    - by blacksheep
    i'd like to save and play again this recorded sounds: @interface Recorder : NSObject { NSMutableArray *times; NSMutableArray *samples; } @end @implementation Recorder – (id) init { [super init]; times = [[NSMutableArray alloc] init]; samples = [[NSMutableArray alloc] init]; return self; } – (void) recordSound: (id) someSound { CFAbsoluteTime now = CFAbsoluteTimeGetCurrent(); NSNumber *wrappedTime = [NSNumber numberWithDouble:now]; [times addObject:wrappedTime]; [samples addObject:someSound]; } @end thanx blacksheep

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  • MS Access: Order of Events in event ApplyFilter (ADP Project)

    - by Jose Valdes
    I'm having problems with the execution of ServerFilterByForm in Access 2003 When I apply the entered filter it returns the requested data but after it appear on screen (Form) it disappears. Don't know why this is happening Does anyone had the same problem? How can it be solved? Heris is part of the code Private Sub Form_ApplyFilter(Cancel As Integer, ApplyType As Integer) Dim stSql As String If Len(ServerFilter) > 0 Then stSql = "SELECT * FROM v_InitialReviewQuery " & _ " WHERE " + ServerFilter & _ " ORDER BY acctnumber" Else stSql = "SELECT top 1 * FROM v_InitialReviewQuery ORDER BY acctnumber" End If Me.RecordSource = stSql End Sub

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  • Decent 1gb switch (16-24 port) for rack...

    - by TomTom
    Hallo, for a rack containing a smaller nubmer of servers (5 at the moment, going to stay in this area), I look to replace the currently aging 100mbit switch with a 1gb switch. This is for the backend between the servers. I expect some ISCIS traffic there ,so a 10gbit option would be nice (preferably for two ports, as extension modules). I dont need management, this is a pure backend of an internal cluster. I do VLAN, but there is no sensible management the switch can do there. I wuold like: * 1he only, obviously * preferable limited moving parts. * Low price ;) * Enough power to run at least half the ports in full speed at the same time. Anyone any recommendations?

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  • Kohana controller shows blank page if missing URI segment/argument

    - by Petruza
    When accessing http://www.nowplayingnashville.com/event2/detail/440698386/Whatever the controller shows normally. But when omitting the last parameter (event's title, which can be any string), http://www.nowplayingnashville.com/event2/detail/440698386/ It shows blank. I added a default value and tried to hardcode the title on the first line of the controller, but it doesn't work anyway. It looks like a view issue, because I can add an echo at the end of the controller and it gets printed, so the controller is executing to the end, but the views aren't displayed. This problem is present on the live site, but I checked out the code on my local machine and it works perfectly without a title. That's strange. Could it be a Kohana or Apache configuration issue?

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  • Checking if parsed date is within a date range

    - by Brett Powell
    So I am using a scripting language with c++-like syntax, and I am trying to think of the best way to check if a date is within range. The problem I am running into is that if the current day is in a new month, the check is failing. Here is what my code looks like: if(iMonth >= iStartMonth && iMonth <= iEndMonth) { if(iDay >= iStartDay && iDay <= iEndDay) { if(iYear >= iStartYear && iYear <= iEndYear) { bEnabled = true; return; When I have something like this: Start date: 3 27 2010 End Date: 4 15 2010 Current Date: 3 31 2010 The day check fails because if (iDay <= iEndDay) does not pass. The scripting language doesn't have a lot of time related functions, and I can't compare timestamps because I'm allowing users to put like "03:27:2010" and "04:15:2010" as start/end dates in a config file. I'm assuming I am just not thinking straight and missing an easy fix.

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  • How to prevent UI from freezing during lengthy process?

    - by OverTheRainbow
    Hello, I need to write a VB.Net 2008 applet to go through all the fixed-drives looking for some files. If I put the code in ButtonClick(), the UI freezes until the code is done: Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click 'TODO Find way to avoid freezing UI while scanning fixed drives Dim drive As DriveInfo Dim filelist As Collections.ObjectModel.ReadOnlyCollection(Of String) Dim filepath As String For Each drive In DriveInfo.GetDrives() If drive.DriveType = DriveType.Fixed Then filelist = My.Computer.FileSystem.GetFiles(drive.ToString, FileIO.SearchOption.SearchAllSubDirectories, "MyFiles.*") For Each filepath In filelist 'Do stuff Next filepath End If Next drive End Sub Google returned information on a BackGroundWorker control: Is this the right/way to solve this issue? If not, what solution would you recommend, possibly with a really simple example? FWIW, I read that Application.DoEvents() is a left-over from VBClassic and should be avoided. Thank you.

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  • startup cassandra layout

    - by davidkomer
    We've got a relatively low-traffic site (~1K pageviews/day) hosted on a single server, and expect it to grow significantly over the next few years. I'm thinking of moving over to Rackspace CloudServer or EC2 and firing up 3 nodes (all on CentOS): 2 x Web (Apache) - with loadbalancer 1 x MySQL (for the Wordpress powered part) The question is where to put Cassandra right now... Should it sit on each Web node, or the MySQL node? My thought right now is to put it on Web nodes. It's my understanding that Cassandra has the benefits of fault-tolerance (i.e. if we take a node down, the site is still operational). So even with only 2 nodes, we'd have that benefit as opposed to just putting it on the MySQL node. Also, as we scale up and add another node, a cassandra instance can come along with it and the php can always run its queries on localhost. Is this a good idea?

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  • How can I handle multiple views of a data object? Which design pattern is acceptable?

    - by tranquil.byte
    I have a person object. class Person { private $name; ... } I need to be able to change how they are displayed on the front-end ( visitors have control ). They can choose list view, grid view, photo view for example. class PersonDisplay { public function displayList() { // Query database // Output html to display in list mode } public function displayPhoto() { // Query database // Output html to display in photo mode } } Is this an acceptable way to handle the presentation of the items on the front-end or is there a specific design pattern I should be researching to help me with this task? Does anyone have any suggestions or ideas where this could go wrong or if this could potentially make maintenance a nightmare? The Person object was just an example very similiar to what I am using.

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  • Formatting my String

    - by pringlesinn
    I need to write currency values like $35.40 (thirty five dollars and forty cents) and after that, i want to write some "****" so at the end it will be: thirty five dollars and forty cents********* in a maximun of 100 characters I've asked a question about something very likely but I couldn't understand the main command. String format = String.format("%%-%ds", 100); String valorPorExtenso = String.format(format, new Extenso(tituloTO.getValor()).toString()); What do I need to change on format to put *** at the end of my sentence? The way it is now it puts spaces.

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  • Rails3 and safe nl2br !

    - by arkannia
    Hi, I have a system for the users to be able to post comments. The comments are grasped into a textarea. My problem is to format the comments with br tag to replace \n In fact, i could do something like that s.gsub(/\n/, '<br />') But the xss protection including in rails escapes br tags. So i could do this s.gsub(/\n/, '<br />').html_safe But then, all the tags are accepted even script.... causing a big security problem So my question is : how to format text with br safely ? Thanks EDIT: For now, i have add this def sanitaze self.gsub(/(<.*?>)/, '') end def nl2br self.sanitaze.gsub(/\n/, '<br />').html_safe end

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  • does a ruby on rails rack class get access to the entire rails environment?

    - by Andrew Arrow
    that is when the def call(env) method is invoked by hitting any url, can I inside that method make some ActiveRecord queries, use classes defined in lib, etc. etc. Or is it more like an irb console without the rails env loaded? Another way to put it with a rake task example: task :foo => :environment do # with env end task :foo2 do # without env end I would think rack classes would NOT get the environment so they are super fast and don't take all the overhead of a normal rails request. But that doesn't seem to be the case. I CAN make ActiveRecord queries inside my rack class. So what is the advantage of rack then?

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  • Keyboard layout to shift wasd keys

    - by Joel Coehoorn
    I like to play video games on my computer. One of the things that bugs me, though, is how the wasd keys became the standard movement keys in first person shooters and mmorpgs. To me, esdf makes a lot more sense, because that matches your normal hand placement for typing. "Fixing" that layout is always the first thing I do when installing a new game. Sadly, this is often a pain in the neck, and some games won't let you do it at all. Is there an alternative keyboard layout you can install that will just switch these around, so the wasd keys fall in the esdf positions? And is low-level enough two work with DirectX/DirectInput, perhaps that works with the language bar for easy swapping back and forth?

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  • SAS disk performance drops a while after reboot.

    - by Flamewires
    So we have some workstations with identical hardware. The Fedora14 box has a couple weeks uptime and still get good performance. hdparm -tT /dev/sda /dev/sda: Timing cached reads: 21766 MB in 2.00 seconds = 10902.12 MB/sec Timing buffered disk reads: 586 MB in 3.00 seconds = 195.20 MB/sec The Cent 5.5 boxes however seem to be okay after a reboot, /dev/sda: Timing cached reads: 34636 MB in 2.00 seconds = 17354.64 MB/sec Timing buffered disk reads: 498 MB in 3.01 seconds = 165.62 MB/sec but some time later( unsure exactly, tested at approx 1 day uptime) /dev/sda: Timing cached reads: 2132 MB in 2.00 seconds = 1064.96 MB/sec Timing buffered disk reads: 160 MB in 3.01 seconds = 53.16 MB/sec drop to this. This is with very low load. I believe they all have the same bios settings. Any ideas what could cause this on Cent? Ask for more info. It might also be worth noting, that passing the --direct flag causes the slow boxes to perform similarly to the non-slow ones for buffered disk reads.

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