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  • accepts_nested_attributes_for and has_many :through relations.

    - by antiarchitect
    I want to make a simple examing application on RoR 2.3. The problem area is to make an exam_session in a one form with only one submit action. For the exam session there are selected some number of questions from the question pool in random order. For these questions there are selected some number of alternatives (to check is this a single answer question or multi answer question I use the number of correct alternatives: if only 1 - single, 1 - multi. Radiobuttons or checkboxes in form to answer depends on it). I have models: Questions ---< Alternative and ExamSession. I think there must be has_many :through relations between ExamSession and Questions and has_many :through relation between the intermediate table (for example QuestionsExamSession) and Alternative to point what alternatives are answers of the student on this Question. So the questions are: Is this scheme is too complicated and there is a way to do it simple and clear? Is there any way to organize models in such a way to make the form I want to work?

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  • How can I detect client-side when a page load is the result of an AJAX history point?

    - by Nick
    I'm trying to prevent a "flicker" effect that is occurring on my ASP.NET page which occurs when a user navigates to the page via the browser back button after having navigated away from it. The reason for the flicker is that I'm using an Update Panel which has some content in there on the initial page-load. As a result, when the page is loaded via a back button that initial content is shown very briefly before it is updated with the correct History-aware data. In order to overcome this I am intending on having the updatepanel hidden (display: none) on inital page load and then show it as long as we don't have any history to deal with. The problem is that I can't find out what to check to determine if there's any history. I can see that the Sys.Application has a _history member but when I'm checking it on page init it is null each time. Does anyone know what I should be checking to determine if there's history to deal with for a page load client-side? And at what point to do it?

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  • the query is breaking. How to skip rows PHP

    - by Victor
    Hello all. I have a question probably lame but it made me stuck I have the a db query $query_Recordset10 = "SELECT * FROM products WHERE razdel='mix' AND ID='$ID+1' AND litraj='$litri' ORDER BY ID ASC"; $Recordset10 = mysql_query($query_Recordset10, $victor) or die(mysql_error()); $row_Recordset10 = mysql_fetch_array($Recordset10); $totalRows_Recordset10 = mysql_num_rows($Recordset10); This is the query for the next product in the line based in the ID of the current product thats on the page. But if the next product matching the criteria in the query is 2 or more ID's ahead my cycle breaks. So is there a way for skipping this rows and get the next ID matching the criteria. Thank you very much.

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  • dictionary of lists of dictionaries in python

    - by Andy
    I'm a perl scripter working in python and need to know a way to do the following perl in python. $Hash{$key1}[$index_value]{$key2} = $value; I have seen the stackoverflow question here: List of dictionaries, in a dictionary - in Python I still don't understand what self.rules is doing or if it works for my solution. My data will be coming from files, and will I will be using regexes to capture to temporary variables until ready to store in the data structure. If you need to ask, the order related to the $index_value is important and would like to be maintained as an integer. Any suggestions are appreciated or if you think I need to rethink data structures with Python that would be helpful.

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  • Visual Studio C++ multi-project solution

    - by Lucas
    I have created an C++ solution in VS2008. The first project contains the model. The second projects is the view. The problem is that i don't get make references to my model classes defined in the first project. The message error is : Error 1 fatal error C1083: Cannot open include file: 'utils/GeradorSistematicoDeAlturaDoPlanoDeCorteStrategy.h': No such file or directory c:\Users\user\Programação em C++\Simulacao\Simulacao_Testes\src\Teste1.cpp 3 Simulacao_Testes Is there any configuration in VS2008 that makes to be made in order to, from the my view (second project) project, i do make references to the first project, the model?

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  • WPF: "Items collection must be empty before using ItemsSource."

    - by Zack Peterson
    I'm trying to get images to display in a WPF ListView styled like a WrapPanel as described in this old ATC Avalon Team article: How to Create a Custom View. When I try to populate the ListView with a LINQ-to-Entities queried collection of ADO.NET Entity Framework objects I get the following exception: Exception Items collection must be empty before using ItemsSource. My code… Visual Basic Private Sub Window1_Loaded(...) Handles MyBase.Loaded ListViewImages.ItemsSource = From g In db.Graphic _ Order By g.DateAdded Ascending _ Select g End Sub XAML <ListView Name="ListViewImages" SelectionMode="Single" ItemsSource="{Binding}"> <local:ImageView /> </ListView> I put a breakpoint on that line. ListViewImages.ItemsSource is Nothing just before the LINQ assignment.

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  • Display a "Waiting Menssage" before the POST form send

    - by DomingoSL
    I have a upload file form, when you hit Submit it send the file to my server, but it takes a while, in the mean time i need to tell the user wait in order to get the file uploaded, because he can press Submit again because there is no menssage to prevent him. So, the user fill a few fields in the form, including a file. When he Send the form it sends the variables via POST to the same page: <form action="<?php echo $_SERVER['PHP_SELF']; ?>" enctype="multipart/form-data" method="post"> A php script detect the page now have POST variables a do something. In the time between the send action and the page reload i need to display a mensage, how can i do that??? Thanks It will be nice if you now how to trigger that with colorbox. I know how to use it from a link but no from this POST action.

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  • How to structure Python package that contains Cython code

    - by Craig McQueen
    I'd like to make a Python package containing some Cython code. I've got the the Cython code working nicely. However, now I want to know how best to package it. For most people who just want to install the package, I'd like to include the .c file that Cython creates, and arrange for setup.py to compile that to produce the module. Then the user doesn't need Cython installed in order to install the package. But for people who may want to modify the package, I'd also like to provide the Cython .pyx files, and somehow also allow for setup.py to build them using Cython (so those users would need Cython installed). How should I structure the files in the package to cater for both these scenarios? The Cython documentation gives a little guidance. But it doesn't say how to make a single setup.py that handles both the with/without Cython cases.

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  • UITableView: moving a row into an empty section

    - by Frank C
    I have a UITableView with some empty sections. I'd like the user to be able to move a row into them using the standard edit mode controls. The only way I can do it so far is to have a dummy row in my "empty" sections and try to hide it by using tableView:heightForRowAtIndexPath: to give the dummy row a height of zero. This seems to leave it as a 1-pixel row. I can probably hide this by making a special type of cell that's just filled with [UIColor groupTableViewBackgroundColor], but is there a better way? This is all in the grouped mode of UITableView UPDATE: Looks like moving rows into empty sections IS possible without any tricks, but the "sensitivity" is bad enough that you DO need tricks in order to make it usable for general users (who won't be patient enough to slowly hover the row around the empty section until things click)

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  • Whats the significance of named scope in rails?

    - by piemesons
    Before going for details. Question 1:-- Whats the meaning of scope here (ie named scope)? whats the benefits of using named scope? Now:- from agile development with rails book:-- class Order < ActiveRecord::Base named_scope :last_n_days, lambda { |days| {:conditions => ['updated < ?' , days] } } named_scope :checks, :conditions => {:pay_type => :check} end Such a named scope would make finding the last weeks worth of orders a snap. orders = Orders.last_n_days(7) Scopes can also be combined orders = Orders.checks.last_n_days(7) why we are using named_scope here. We can do the same using methods. Whats special thing we got using named_scope.

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  • jQuery preventDefault stops rest of code working

    - by Tim
    I have this code where I am using jQuery to navigate to the next page, because I want some effects to take place before that happens. The problem is, that everything after the prevent.Default(); doesn't seem to work! $("a").click(function(event){ event.preventDefault(); $(".content-center").animate({height: "0px"}, 500); navigate($(this).attr('href')); }); I need things to happen in that order, so that the animation happens and once it's complete - load the next page... Does anyone have any ideas? Many thanks in advance? Tim Updated code (moves to new page but no animation occurs) --- $("a").click(function(event){ event.preventDefault(); var driver = $(this).attr('href'); $(".content-center").animate({ height: "0px" }, 500, function(){ navigate(driver); }); }); see: http://bit.ly/aOeYgE Many thanks for your help!!

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  • Flash AS3 Chrome Mailto link issues

    - by Ryano
    Hi I have a problem with flash in Chrome. I have a couple of mailto: links in my flash web page, when clicking on them in chrome they either don't do anything at all, opens up a blank page/tab and no email client or opens an email client once (have to refresh the page in order to click it again). Does anyone know the best way in which to do a chrome supported mailto? Seems to work in all other browsers. I have changed the target to _blank, _parent, _self etc. Plus I have one link actually on the stage and another running through AS. Hope that makes sense, cheers.

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  • Pros and cons of programmatically enforcing foreign key than in database

    - by Jeffrey
    It is causing so much trouble in terms of development just by letting database enforcing foreign key. Especially during unit test I can’t drop table due to foreign key constrains, I need to create table in such an order that foreign key constrain warning won’t get triggered. In reality I don’t see too much point of letting database enforcing the foreign key constrains. If the application has been properly designed there should not be any manual database manipulation other than select queries. I just want to make sure that I am not digging myself into a hole by not having foreign key constrains in database and leaving it solely to the application’s responsibility. Am I missing anything? P.S. my real unit tests (not those that use mocking) will drop existing tables if the structure of underlying domain object has been modified.

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  • Sending a file from my application (Indy/Delphi) to an ASP page and then onto another server (Amazon

    - by user89691
    I have a need to store files on Amazon AWS S3, but in order to isolate the user from the AWS authentication I want to go via an ASP page on my site, which the user will be logged into. So: The application sends the file using the Delphi Indy library TidHTTP.Put (FileStream) routine to the ASP page, along with some authentication stuff (mine, not AWS) on the querystring. The ASP page checks the auth details and then if OK stores the file on S3 using my Amazon account. Problem I have is: how do I access the data coming in from the Indy PUT using JScript in the ASP page and pass it on to S3. I'm OK with AWS signing, etc, it's just the nuts and bolts of connecting the two bits (the incoming request and the outgoing AWS request) ... TIA R

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  • Problem with numbers

    - by StolePopov
    I am given a number N, and i must add some numbers from the array V so that they wil be equal. V is consisting of numbers that are all powers of 3: N = 17 S = 0 V = 1 3 9 27 81 .. I should add numbers from V to N and S in order to make them equal. The solution to the example above is : 17 + 1 + 9 = 27, 27, 1 and 9 are taken from V, a number from V can be taken only once, and when taken it's removed from V. I tried sorting V and then adding the biggest numbers from V to S until S has reached N, but it fails on some tests when it's like: N = 7 S = 0 V = 1 3 9 27 So the solution will be: 7 + 3 = 9 + 1 In examples like this i need to add numbers both to N and S, and also select them so they become equal. Any idea of solving this ? Thanks.

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  • How to secure connection between PHP and Android

    - by Elad Cohen
    I am developing an application for the Android that requires a connection with PHP pages in order to add sensitive data to a database that will affect the application. Since it's very easy to reverse engineer an android app, one can simply find the url where the data is sent to and manipulate it. I thought about creating a registration based on IMEI, but one can still able to manipulate it for his malicious purposes. I have also checked OAuth but I didn't really understand how it works and if it can help in my condition. What can I do to fully secure my application? Thanks in advance! EDIT: By the way, what I am mostly trying to achieve here is to make sure the requests are being sent from an Android and not from any other device.

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  • Microsoft.Biztalk.explorerom.dll reference in asp.net application resulting system.nullreferenceexce

    - by sheetal.oza
    Hi, I have a asp.net application in order to start/stop applications and ports of Biztalk server 2006 r2. I have used "Microsoft.Biztalk.explorerom.dll (C:/Program Files/Biztalk Server 2006/Developer tool) " to achieve this. This is working fine on development machine since biz talk server is installed on local machine. But in the production environment (asp.net web server ,windows 2003 and iis 6.0)...this give System.nullreferenceexception (object reference not set..) at BtsCatalogExplorer explorer = (BtsCatalogExplorer)myGroup.CreateInstance(typeof(BtsCatalogExplorer)) my biztalk server and sql server are on two different box. In my setup (asp.net web application)..adding Microsoft.Biztalk.explorerom.dll and Microsoft.Biztalk.Applicationdeployment.engine.dll to GAC. But still no luck. Do i need to install biz talk server on my local machine even though I am connecting to different biz talk server?? And help is appreciated...

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  • Trying to cat files - unrecognized wildcard

    - by Barb
    Hello, I am trying to create a file that contains all of the code of an app. I have created a file called catlist.txt so that the files are added in the order I need them. A snippet of my catlist.txt: app/controllers/application_controller.rb app/views/layouts/* app/models/account.rb app/controllers/accounts_controller.rb app/views/accounts/* When I run the command the files that are explicitly listed get added but the wildcard files do not. cat catlist.txt|xargs cat > fullcode I get cat: app/views/layouts/*: No such file or directory cat: app/views/accounts/*: No such file or directory Can someone help me with this. If there is an easier method I am open to all suggestions. Barb

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  • iphone sqlite3 UPDATE with LIMIT and OFFSET clause

    - by Remover
    Does anyone know if the LIMIT and OFFSET clause work when using the UPDATE statement on iphone. on the sqlite3 website it says "if SQLite is built with the SQLITE_ENABLE_UPDATE_DELETE_LIMIT compile-time option then the syntax of the UPDATE statement is extended with optional ORDER BY and LIMIT clauses.." if not, can it be enabled? I'm using "UPDATE TESTDATA SET VAR = 1 LIMIT 1 OFFSET 1" but i get an error: near "LIMIT": syntax error I can get LIMIT and OFFSET clause to work on a SELECT statement. Are there any other ways around this?

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  • Multiple Default Routes in ASP.NET MVC to different Default Actions

    - by Alex
    I have multiple controllers with different actions (no "Index" actions). The actions I consider "default" actions, are named differently. I want to create default routes for their names and have the first available action (from my list of default actions) executed if only the controller name is provided in the route. So, for example, I have the following actions which I want to consider default and want checked for their existence in a controller in this order: List() Draw() ViewSingle() The routing should somehow search for /{controller} and then take the first available action from the list above as default action, e.g.: /ControllerA -> ControllerA.List() /ControllerB -> ControllerB.Draw() /ControllerC -> ControllerC.ViewSingle() /ControllerD -> ControllerD.Draw() /ControllerE -> ControllerE.List() Is this possible? I tried creating additional Default actions like this but couldn't get it to work: routes.MapRoute("Default1", "{controller}/{action}", new { controller = UrlParameter.Optional, action = "List" } routes.MapRoute("Default2", "{controller}/{action}", new { controller = UrlParameter.Optional, action = "Draw" } routes.MapRoute("Default3", "{controller}/{action}", new { controller = UrlParameter.Optional, action = "ViewSingle" } Help?

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  • R and SPSS difference

    - by sfactor
    i will be analysing vast amount of network traffic related data shortly. i will pre-process the data in order to analyse it. i have found that R and SPSS are among the most popular tools for statistical analysis. i will also be generating quite a lot of graphs and charts. so i was wondering what is the basic difference between these two softwares. i am not asking which one is better. i just wanted to know what are the difference in terms of workflow between the two besides the fact that SPSS has a GUI. I will be mostly working with scripts in either case anyway so i wanted to know about the other differences.

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  • Smarty debug mode not displaying included templates.

    - by Kyle Sevenoaks
    On www.euroworker.no/order I have set Smarty's debug mode on with {debug output=html} in the header, so it will debug every page. But it says: Smarty Debug Console included templates & config files (load time in seconds): no templates included And after a list of template variables, {$cart} Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 561962 bytes) in /home/euroworkerno/www/library/smarty/libs/plugins/modifier.debug_print_var.php on line 30 It also doesn't display a list of templates for any url.. This is strange, can anyone point me to why it won't display the lit of .tpls? I need to find some HTML comments that someone has left in to rid IE of a display bug. Thanks.

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  • DRUPAL: Spamspan module... how does it work ?

    - by Patrick
    hi, I've installed http://drupal.org/project/spamspan module for Drupal (drupal.org/project/spamspan), in order to obfuscate the e-mail addresses on my website. However I'm not sure it is working. I can see the email url from source html and I think the module is not filtering anything. I've added some e-mails in the text editor CKEditor. Is it automatically detecting these emails written in text editor ? I haven't find any settings menu, after I installed the module. I guess there is not. thanks

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  • database design in google app engine

    - by iamgopal
    hi , i am designing a simple project based to do list. the idea is to define tasks under project ( no workflow - just "task is completed" or not is required. ) in a hirarchial way. i.e. each task has multiple task and that task may have other multiple task. a project can be said to be completed if all task under that project are completed. , i tought of using refrenceproeperty to create hirarchy , but could not figure out easy way ( which do not take more than 30 seconds to find all the children of a project and check weather it is completed or not ) . to detect if project is complete or not. how to design database for such job ? and also , if i need to copy the project in order to define another project , how to copy hierarchical data ?

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  • best way to authenticate and consume web service using phonegap (html5/javascript)

    - by Raiss
    I am going to develop a phonegap application which is pretty simple. I need to implement an authentication and some simple data transfer back and forth to the phone and server. I prefer to use ASP.NET as a web service and our database is MS SQL but I am not sure what approach should I take to create a secure communication between Phonegap App and webservice. The problem with a simple AJAX request is limitation in cross-domain and I’m not sure if JSONP is a good option. I was wondering if someone can tell me what technology I should use in order to make a semi secure connection which works with PhoneGap (html5, javascript ) and .Net webservice. I understand that it’s a general question but I need to know what technology is the best in such a case. thanks

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